用C#,SQL Server编写的音乐播放软件
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient; namespace 私属音乐点播
{
public partial class frmMain : Form
{
public frmMain()
{
InitializeComponent();
}
DBHelper db = new DBHelper();
/// <summary>
/// lv的目标界面定义,0歌曲,1歌手,2国家,3性别,
/// 亮点
/// </summary>
int num = ; //lv的目标界面定义,0歌曲,1歌手,2国家,3性别,4字数
//单击歌星点歌按钮事件
private void tsbtnTool_singer_Click(object sender, EventArgs e)
{
//目标项在表中的个数
string strCounts=@"select COUNT(1) from singer_info";
//查询歌手Id和歌手名字,私有dr方法
string str = @"select singer_id,singer_name from singer_info";
//获取歌手方法
GetSinger(strCounts, str);
}
//双击lv_Login组件事件
string gender = "男";
private void lv_Login_DoubleClick(object sender, EventArgs e)
{ //亮点
switch (num)
{
//歌曲双击事件
case :
int result = Convert.ToInt32(lv_Login.SelectedItems[].Tag);
DoubleClickSong(result);
break;
//歌手双击事件
case :
int singerId = Convert.ToInt32(lv_Login.SelectedItems[].Tag);
string str = @"select song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_info.singer_id=" + singerId + " and song_info.singer_id = singer_info.singer_id";
num = ;
SingerToSongs(str);
break;
//国家双击事件
case :
int type_id = Convert.ToInt32(lv_Login.SelectedItems[].Tag);
string strCount = @"select count(1) from singer_info where singer_sex='" + gender + "' and singertype_id=" + type_id + "";
string strInfo=@"select singer_id,singer_name from singer_info where singer_sex='" + gender + "' and singertype_id=" + type_id + "";
//下一个lv_Login为歌曲,num=1
num = ;
GetSinger(strCount,strInfo);
break;
//性别双击事件
case :
gender = lv_Login.SelectedItems[].Text;
//下一个为歌手地区,num值为2
num = ;
//搞出国家lv方法
GetSingerType();
break;
//字数点歌
case :
num = ;
string playCount;
if (Convert.ToInt32(lv_Login.SelectedItems[].Tag)!=)
{
playCount = @"select song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_word_count = " + lv_Login.SelectedItems[].Tag + " and song_info.singer_id = singer_info.singer_id";
}
else
{
playCount = @"select song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_word_count > 10 and song_info.singer_id = singer_info.singer_id";
}
SingerToSongs(playCount);
break;
//其他非合法组件双击事件,直接跳出
default:
//不用思索,直接跳出
return;
}
}
//类型点歌按钮事件
private void tsbtnTool_type_Click(object sender, EventArgs e)
{
//打开性别lv
//目标lv为性别,所以num为3
num = ;
imglist.Images.Clear();
lv_Login.Clear();
lv_Login.Controls.Clear();
lv_Login.View = View.LargeIcon;
try
{
imglist.ImageSize = new Size(, );
imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\male.png"));
imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\female.png"));
imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\couple.png"));
}
catch (Exception)
{
imglist.ImageSize = new Size(, );
ListViewItem male1 = new ListViewItem("男");
ListViewItem female1 = new ListViewItem("女");
ListViewItem couple1 = new ListViewItem("组合");
lv_Login.Items.Add(male1);
lv_Login.Items.Add(female1);
lv_Login.Items.Add(couple1);
return;
}
lv_Login.LargeImageList = imglist;
ListViewItem male = new ListViewItem("男", );
ListViewItem female = new ListViewItem("女", );
ListViewItem couple = new ListViewItem("组合", );
lv_Login.Items.Add(male);
lv_Login.Items.Add(female);
lv_Login.Items.Add(couple);
}
#region 拼音点歌事件
private void tsbtnTool_pinyin_Click(object sender, EventArgs e)
{
lv_Login.Clear();
lv_Login.Controls.Add(txt);
lv_Login.Controls.Add(lbl);
txt.Location = new Point(, );
txt.Size = new System.Drawing.Size(new Point(, ));
txt.Focus();
lbl.Text = "(请输入要查找的歌曲拼音或缩写)";
lbl.Font = new Font("幼圆", );
lbl.ForeColor = Color.Blue;
lbl.Location = new Point(, );
lbl.Size = new Size(new Point(, ));
txt.TextChanged += txt_TextChanged;
lvNew.Location = new Point(-, );
lvNew.Size = new Size(, );
lvNew.FullRowSelect = true;
lvNew.View = View.Details;
lvNew.Columns.Clear();
lvNew.Columns.Add("歌曲名称", );
lvNew.Columns.Add("歌手", );
lvNew.Columns.Add("点播次数", );
lvNew.DoubleClick += lvNew_DoubleClick;
lv_Login.Controls.Add(lvNew);
}
//添加三个个控件
TextBox txt = new TextBox();
Label lbl = new Label();
ListView lvNew = new ListView();
//lv_Login的新添项lvNew的Items双击事件
private void lvNew_DoubleClick(object sender, EventArgs e)
{
//在这里引用歌曲双击事件
int result = Convert.ToInt32(lvNew.SelectedItems[].Tag);
//MessageBox.Show(result.ToString());
DoubleClickSong(result);
}
//new出的txt的text值改变时事件
private void txt_TextChanged(object sender, EventArgs e)
{
lvNew.Items.Clear();
string result="";
if (!txt.Text.Trim().Equals(string.Empty))
{
foreach (char item in txt.Text)
{
if (item>='a'&&item<='z')
{
result += item;
result += '%';
}else if (item>='A'&&item<='Z')
{
result += item.ToString().ToLower();
result += '%';
}
}
}
string str;
if (!result.Equals(string.Empty))
{
str = @"select song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_ab like '%" + result + "%' and song_info.singer_id = singer_info.singer_id";
}
else
{
return;
}
try
{
SqlDataReader dr = db.Dr(str);
if (dr.HasRows)
{
while (dr.Read())
{
ListViewItem item = new ListViewItem(dr["song_name"].ToString());
item.Tag = dr["song_id"].ToString();
item.SubItems.Add(dr["singer_name"].ToString());
item.SubItems.Add(dr["song_play_count"].ToString());
lvNew.Items.Add(item);
}
dr.Close();
}
}
catch (Exception)
{
MessageBox.Show("私有连接异常!");
}
finally
{
db.CloseConnection();
}
}
#endregion
//金榜排行按钮点击事件
private void tsbtnTool_order_Click(object sender, EventArgs e)
{
imglist.Images.Clear();
lv_Login.SmallImageList = imglist;
string str = @"select top 10 song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_info.singer_id=singer_info.singer_id order by song_play_count desc";
num = ;
SingerToSongs(str);
lv_Login.View = View.List;
imglist.ImageSize = new Size(, );
try
{
for (int i = ; i < ; i++)
{
imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\" + i + ".png"));
lv_Login.Items[i].ImageIndex = i;
}
}
catch (Exception)
{ }
}
//单击字数点歌按钮事件
private void tsbtnTool_counts_Click(object sender, EventArgs e)
{
//目标lv_Login为字数lv, num为4
num = ;
lv_Login.Clear();
lv_Login.Controls.Clear();
imglist.Images.Clear();
lv_Login.LargeImageList = imglist;
imglist.ImageSize = new System.Drawing.Size(, );
lv_Login.View = View.LargeIcon;
for (int i = ; i < ; i++)
{
imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\" + i + ".png"));
ListViewItem item = new ListViewItem((i) + "个字",i-);
item.Tag = i+;
lv_Login.Items.Add(item);
}
imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\N.png"));
ListViewItem itemN = new ListViewItem("N个字", );
itemN.Tag = ;
lv_Login.Items.Add(itemN);
}
//定时器事件
private void timer_Tick(object sender, EventArgs e)
{
Playing();
}
/// <summary>
/// 歌手双击方法
/// </summary>
/// <param name="str">查询歌曲语句</param>
public void SingerToSongs(string str)
{
num = ;
lv_Login.View = View.Details;
lv_Login.Clear();
lv_Login.Controls.Clear();
lv_Login.Columns.Add("歌曲名称", );
lv_Login.Columns.Add("歌手", );
lv_Login.Columns.Add("点播次数", );
try
{
SqlDataReader dr = db.Dr(str);
if (dr.HasRows)
{
while (dr.Read())
{
ListViewItem item = new ListViewItem(dr["song_name"].ToString());
item.Tag = dr["song_id"].ToString();
item.SubItems.Add(dr["singer_name"].ToString());
item.SubItems.Add(dr["song_play_count"].ToString());
lv_Login.Items.Add(item);
}
dr.Close();
}
}
catch (Exception)
{
MessageBox.Show("私有连接异常!");
}
finally
{
db.CloseConnection();
}
}
/// <summary>
/// 播放列表专属数组
/// </summary>
Song[] playing_list = new Song[];
/// <summary>
/// 歌曲双击方法
/// </summary>
/// <param name="result">双击歌曲项的Tag值</param>
public void DoubleClickSong(int result)
{
//循环判定
foreach (Song song in playing_list)
{
if (song!=null && song.SongId == result.ToString())
{
MessageBox.Show("已点!");
return;
}
else if (song==null)
{
break;
}
}
int i = ;
foreach (Song one in playing_list)
{
if (one != null)
i++;
}
string str = @"select song_name from song_info where song_id = " + result + "";
try
{
SqlDataReader dr = db.Dr(str);
if (dr.HasRows)
{
if (dr.Read())
{
playing_list[i] = new Song();
playing_list[i].SongName = dr["song_name"].ToString();
playing_list[i].SongId = result.ToString();
}
}
dr.Close();
}
catch (Exception)
{
MessageBox.Show("私有连接异常!");
}
finally
{
db.CloseConnection();
if (playing_list[i]!=null)
{
playing_list[i].Songurl = GetSongurlById(result.ToString());
}
}
ListViewItem item = new ListViewItem(playing_list[i].SongName);
///注意
///注意
if (i == )
{
item.SubItems.Add("正在播放");
wmp.URL = playing_list[i].Songurl;
try
{
SetPlayCount(playing_list[i].SongId);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
item.SubItems.Add("未播放");
try
{
SetPlayCount(playing_list[i].SongId);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
item.SubItems.Add(playing_list[i].SongId);
item.Tag = playing_list[i].Songurl;
lvPlay_list.Items.Add(item);
timer.Enabled = true;
}
/// 当前播放的歌曲在对象数组中的下标
/// </summary>
int playingIndex = ;
/// <summary>
/// 播放方法
/// </summary>
public void Playing()
{
//重新写
if (wmp.playState==WMPLib.WMPPlayState.wmppsPlaying)
{
try
{
//面板信息更改
lblPlaying_name.Text = playing_list[playingIndex].SongName;
lblNext_name.Text = playing_list[playingIndex+].SongName;
}
catch (Exception)
{
lblNext_name.Text = "无";
}
}
else if (wmp.playState == WMPLib.WMPPlayState.wmppsStopped)
{
try
{
//状态更新
lvPlay_list.Items[playingIndex].SubItems[].Text = "已播放";
}
catch (Exception)
{
return;
}
playingIndex++;
//为播放列表的最后一个时,返回index,跳出方法
if (playing_list[playingIndex] == null)
{
playingIndex--;
wmp.URL = string.Empty;
return;
}
wmp.URL = playing_list[playingIndex].Songurl;
lvPlay_list.Items[playingIndex].SubItems[].Text = "正在播放";
//面板提示信息更新
lblPlaying_name.Text = playing_list[playingIndex].SongName;
try
{
lblNext_name.Text = playing_list[playingIndex + ].SongName;
}
catch (Exception)
{
lblNext_name.Text = "无";
}
}
//歌曲读取异常(为空,或,路径异常)
else if (wmp.playState==WMPLib.WMPPlayState.wmppsReady)
{
if (wmp.URL==string.Empty)
{
//只要路径为空,只需要判定播放列表是否为空,否则直接播放
if (playing_list[playingIndex] == null)
{
return;
}
wmp.URL = playing_list[playingIndex].Songurl;
try
{
lvPlay_list.Items[playingIndex].SubItems[].Text = "正在播放";
}
catch (Exception)
{
return;
}
//面板提示信息更新
lblPlaying_name.Text = playing_list[playingIndex].SongName;
try
{
lblNext_name.Text = playing_list[playingIndex +].SongName;
}
catch (Exception)
{
lblNext_name.Text = "无";
}
}
else
{
lvPlay_list.Items[playingIndex].SubItems[].Text = "路径异常";
playingIndex++;
//为播放列表的最后一个时,返回index,跳出方法
if (playing_list[playingIndex] == null)
{
wmp.URL = string.Empty;
return;
}
wmp.URL = playing_list[playingIndex].Songurl;
try
{
lvPlay_list.Items[playingIndex].SubItems[].Text = "正在播放";
}
catch (Exception)
{
return;
} //面板提示信息更新
lblPlaying_name.Text = playing_list[playingIndex].SongName;
try
{
lblNext_name.Text = playing_list[playingIndex + ].SongName;
}
catch (Exception)
{
lblNext_name.Text = "无";
}
}
}
else
{
return;
}
}
/// <summary>
/// 根据歌手id查找歌手图片路径
/// </summary>
/// <param name="id">singerId</param>
/// <returns>singerPhotoUrl</returns>
public string GetSingerurlById(string id)
{
string str2 = @"select resource_path from resource where resource_type='歌手图片地址'";
string singerphoto_url = db.ScalForString(str2);
string str = @"select singer_photo_url from singer_info where singer_id='" + id + "'";
string singer_url = db.ScalForString(str);
string sb = singerphoto_url + singer_url;
return sb;
}
/// <summary>
/// 根据歌曲id查找歌曲路径
/// </summary>
/// <param name="id">songId</param>
/// <returns>songUrl</returns>
public string GetSongurlById(string id)
{
string str = @"select resource_path from resource where resource_type = '歌曲地址'";
StringBuilder sb = new StringBuilder(db.ScalForString(str));
string str2 = @"select song_url from song_info where song_id = " + id + "";
sb.Append(db.ScalForString(str2));
return sb.ToString();
}
/// <summary>
/// 播放次数更新方法
/// </summary>
/// <param name="songId">歌曲Id的字符串格式</param>
/// <returns>是否成功</returns>
public bool SetPlayCount(string songId)
{
int result;
string str1 = @"select song_play_count from song_info where song_id=" + songId + "";
try
{
result = Convert.ToInt32(db.Scal(str1));
}
catch (Exception)
{
result = ;
}
result++;
string str = @"update song_info set song_play_count = " + result + " where song_id=" + songId + "";
if (db.Non(str)>)
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// new国家lv_Login方法
/// </summary>
private void GetSingerType()
{
lv_Login.Clear();
lv_Login.Controls.Clear();
imglist.Images.Clear();
lv_Login.View = View.LargeIcon;
lv_Login.LargeImageList = imglist;
string str1 = @"select count(1) from singer_type";
int result;
try
{
result = Convert.ToInt32(db.Scal(str1));
}
catch (Exception)
{
return;
}
string str = @"select singertype_id, singertype_name from singer_type";
try
{
SqlDataReader dr = db.Dr(str);
if (dr.HasRows)
{
for (int i = ; i < result; i++)
{
dr.Read();
Image img;
try
{
img = Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image" + Convert.ToString(dr["singertype_name"]) + ".png");
}
catch (Exception)
{
img = Image.FromFile("D:\\课程\\S1\\KTV\\MyKTV\\image\\singer_temp.jpg");
}
imglist.Images.Add(img);
ListViewItem item = new ListViewItem(dr["singertype_name"].ToString(),i);
item.Tag = Convert.ToString(dr["singertype_id"]);
lv_Login.Items.Add(item);
}
}
dr.Close();
}
catch (Exception)
{
MessageBox.Show("歌手地区读取异常!");
}
finally
{
db.CloseConnection();
}
}
/// <summary>
/// 获取歌手信息
/// </summary>
/// <param name="strCounts">条件下歌手个数查询语句</param>
/// <param name="str">条件下歌手信息查询语句</param>
private void GetSinger(string strCounts, string str)
{
//歌手lv的目标lv为歌曲
num = ;
imglist.Images.Clear();
lv_Login.Clear();
lv_Login.Controls.Clear();
lv_Login.View = View.LargeIcon;
//确定大图标的图像列表对象
lv_Login.LargeImageList = imglist;
imglist.ImageSize = new System.Drawing.Size(, );
int result = db.ScalForInt(strCounts);
SqlCommand comm = new SqlCommand(str, db.conn);
//new出对象数组,用于存储目标表格信息
Song[] song = new Song[result];
try
{
db.OpenConnection();
SqlDataReader dr = comm.ExecuteReader();
if (dr != null)
if (dr.HasRows)
{
for (int i = ; i < result; i++)
{
if (dr.Read())
{
//读取了歌手id,歌手名称
song[i] = new Song();
song[i].SingerId = dr["singer_id"].ToString();
song[i].SingerName = dr["singer_name"].ToString();
}
}
dr.Close();
}
}
catch (Exception)
{
MessageBox.Show("私有连接异常!");
}
finally
{
db.CloseConnection();
} //改变imagelist的图片大小:imglist.ImageSize = new Size(32, 32); //循环读出图片url,加载对应图片到imglist,给items组合项添加对象数组中每一项
for (int i = ; i < result; i++)
{
song[i].SingerPhoto = GetSingerurlById(song[i].SingerId);
Image img;
//亮点
try
{
img = Image.FromFile(song[i].SingerPhoto);
}
catch (Exception)
{
img = Image.FromFile("D:\\课程\\S1\\KTV\\MyKTV\\image\\singer_temp.jpg");
}
imglist.Images.Add(img);
ListViewItem item = new ListViewItem(song[i].SingerName, i);
item.Tag = song[i].SingerId;
lv_Login.Items.Add(item);
}
}
#region 删除播放列表歌曲,双击播放
////删除选中歌曲按钮事件
private void btnDel_Click(object sender, EventArgs e)
{
int result;
try
{
result = Convert.ToInt32(lvPlay_list.SelectedItems[].Index);
}
catch (Exception)
{
return;
}
//清空对象数组与列表
lvPlay_list.SelectedItems[].Remove();
///亮点
if (result == playingIndex)
{ try
{
if (playing_list[result + ] != null)
{
for (int i = result + ; i < playing_list.Length; i++)
{
playing_list[i - ].SongId = playing_list[i].SongId;
playing_list[i - ].SongName = playing_list[i].SongName;
playing_list[i - ].Songurl = playing_list[i].Songurl;
}
wmp.URL = playing_list[result].Songurl;
}
else
{
playing_list[result] = playing_list[result + ];
wmp.URL = string.Empty;
}
}
catch (Exception)
{
wmp.URL = string.Empty;
}
} }
////双击播放列表组件时
private void lvPlay_list_DoubleClick(object sender, EventArgs e)
{
try
{
wmp.URL = playing_list[Convert.ToInt32(lvPlay_list.SelectedItems[].Index)].Songurl;
lvPlay_list.Items[playingIndex].SubItems[].Text = "已播放";
playingIndex = Convert.ToInt32(lvPlay_list.SelectedItems[].Index);
lvPlay_list.Items[playingIndex].SubItems[].Text = "正在播放";
}
catch (Exception)
{
return;
}
}
////列表循环方式按钮点击事件
private void btnState_Click(object sender, EventArgs e)
{
// Timer timeResult = new Timer();
// if (btnState.Text=="列表循环模式")
// {
// btnState.Text = "单曲循环模式";
// timer.Enabled = false;
// timeResult.Enabled = true;
// timeResult.Interval = 1000;
// timeResult.Tick += timeResult_Tick;
// }
// else if (btnState.Text=="单曲循环模式")
// {
// btnState.Text = "无循环模式";
// timer.Enabled = true;
// timeResult.Enabled = false;
// }
// else if (btnState.Text=="无循环模式")
// {
// btnState.Text = "列表循环模式";
// timer.Enabled = false;
// timeResult.Enabled = true;
// timeResult.Interval = 1000;
// timeResult.Tick += timeResult_Tick;
// }
}
////附加定时器事件
void timeResult_Tick(object sender, EventArgs e)
{ // if (wmp.playState==WMPLib.WMPPlayState.wmppsStopped&&btnState.Text=="单曲循环模式")
// {
// wmp.URL = playing_list[playingIndex].Songurl;
// }
// else if (btnState.Text=="列表循环模式")
// {
// int result=-1;
// foreach (Song item in playing_list)
// {
// if (item!=null)
// {
// result++;
// }
// else
// {
// break;
// }
// }
// if (playingIndex==result)
// {
// playingIndex = 0;
// }
// }
}
#endregion }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;
using System.Data; namespace 私属音乐点播
{
class DBHelper
{
public static string sql = @"Data source=.;initial catalog=KTV;uid=sa;pwd=liuzs";
public SqlConnection conn = new SqlConnection(sql);
//打开数据库连接
public void OpenConnection()
{
if (conn.State == ConnectionState.Closed)
{
conn.Open(); }
else if (conn.State == ConnectionState.Broken)
{
conn.Close();
conn.Open();
}
}
//关闭数据库连接
public void CloseConnection()
{
if (conn.State == ConnectionState.Open || conn.State == ConnectionState.Broken)
{
conn.Close();
}
}
//返回受影响行号方法
public int Non(string str)
{
SqlCommand comm = new SqlCommand(str,conn);
int result = ;
try
{
OpenConnection();
result = Convert.ToInt32(comm.ExecuteNonQuery());
}
catch (Exception)
{
System.Windows.Forms.MessageBox.Show("获取表行号网络异常!");
}
finally
{
CloseConnection();
}
return result;
}
//返回查询首行首列为Int值方法
public int ScalForInt(string str)
{
SqlCommand comm = new SqlCommand(str,conn);
int result = ;
try
{
OpenConnection();
result = Convert.ToInt32(comm.ExecuteScalar());
}
catch (Exception)
{
System.Windows.Forms.MessageBox.Show("获取整型查询值网络异常!");
}
finally
{
CloseConnection();
}
return result;
}
//返回查询首行首列为String值方法
public string ScalForString(string str)
{
SqlCommand comm = new SqlCommand(str,conn);
string result = "";
try
{
OpenConnection();
result = Convert.ToString(comm.ExecuteScalar());
}
catch (Exception)
{
System.Windows.Forms.MessageBox.Show("获取字符串查询值网络异常!");
}
finally
{
CloseConnection();
}
return result;
}
//返回查询首行首列值方法
public object Scal(string str)
{
SqlCommand comm = new SqlCommand(str,conn);
object result = null;
try
{
OpenConnection();
result = comm.ExecuteScalar();
}
catch (Exception)
{
System.Windows.Forms.MessageBox.Show("获取查询值网络异常!");
}
finally
{
CloseConnection();
}
return result;
}
/// <summary>
/// 返回DataReader方法
/// 需要手动关闭读取器,关闭连接
/// 不可与其他数据库查询方法连用,da除外
/// </summary>
/// <param name="str">查询语句</param>
/// <returns>dr对象</returns>
public SqlDataReader Dr(string str)
{
SqlCommand comm = new SqlCommand(str,conn);
SqlDataReader dr = null;
try
{
OpenConnection();
dr = comm.ExecuteReader();
}
catch (Exception)
{
System.Windows.Forms.MessageBox.Show("获取查询值集合网络异常!");
}
return dr;
}
//返回DataAdapter方法
public SqlDataAdapter Da(string str)
{
SqlDataAdapter da = null;
try
{
da = new SqlDataAdapter(str, conn);
}
catch (Exception)
{
System.Windows.Forms.MessageBox.Show("获取表单网络异常!");
}
finally
{
CloseConnection();
}
return da;
} }
}
写这些代码也是我在S1的总结,虽然不是半年来学习的全部,但也是大部分了.
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;using System.Data.SqlClient;
namespace 私属音乐点播{ public partial class frmMain : Form { public frmMain() { InitializeComponent(); } DBHelper db = new DBHelper(); /// <summary> /// lv的目标界面定义,0歌曲,1歌手,2国家,3性别, /// 亮点 /// </summary> int num = 0; //lv的目标界面定义,0歌曲,1歌手,2国家,3性别,4字数 //单击歌星点歌按钮事件 private void tsbtnTool_singer_Click(object sender, EventArgs e) { //目标项在表中的个数 string strCounts=@"select COUNT(1) from singer_info"; //查询歌手Id和歌手名字,私有dr方法 string str = @"select singer_id,singer_name from singer_info"; //获取歌手方法 GetSinger(strCounts, str); } //双击lv_Login组件事件 string gender = "男"; private void lv_Login_DoubleClick(object sender, EventArgs e) { //亮点 switch (num) { //歌曲双击事件 case 0: int result = Convert.ToInt32(lv_Login.SelectedItems[0].Tag); DoubleClickSong(result); break; //歌手双击事件 case 1: int singerId = Convert.ToInt32(lv_Login.SelectedItems[0].Tag); string str = @"select song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_info.singer_id=" + singerId + " and song_info.singer_id = singer_info.singer_id"; num = 0; SingerToSongs(str); break; //国家双击事件 case 2: int type_id = Convert.ToInt32(lv_Login.SelectedItems[0].Tag); string strCount = @"select count(1) from singer_info where singer_sex='" + gender + "' and singertype_id=" + type_id + ""; string strInfo=@"select singer_id,singer_name from singer_info where singer_sex='" + gender + "' and singertype_id=" + type_id + ""; //下一个lv_Login为歌曲,num=1 num = 1; GetSinger(strCount,strInfo); break; //性别双击事件 case 3: gender = lv_Login.SelectedItems[0].Text; //下一个为歌手地区,num值为2 num = 2; //搞出国家lv方法 GetSingerType(); break; //字数点歌 case 4: num = 0; string playCount; if (Convert.ToInt32(lv_Login.SelectedItems[0].Tag)!=11) { playCount = @"select song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_word_count = " + lv_Login.SelectedItems[0].Tag + " and song_info.singer_id = singer_info.singer_id"; } else { playCount = @"select song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_word_count > 10 and song_info.singer_id = singer_info.singer_id"; } SingerToSongs(playCount); break; //其他非合法组件双击事件,直接跳出 default: //不用思索,直接跳出 return; } } //类型点歌按钮事件 private void tsbtnTool_type_Click(object sender, EventArgs e) { //打开性别lv //目标lv为性别,所以num为3 num = 3; imglist.Images.Clear(); lv_Login.Clear(); lv_Login.Controls.Clear(); lv_Login.View = View.LargeIcon; try { imglist.ImageSize = new Size(166, 168); imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\male.png")); imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\female.png")); imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\couple.png")); } catch (Exception) { imglist.ImageSize = new Size(100, 100); ListViewItem male1 = new ListViewItem("男"); ListViewItem female1 = new ListViewItem("女"); ListViewItem couple1 = new ListViewItem("组合"); lv_Login.Items.Add(male1); lv_Login.Items.Add(female1); lv_Login.Items.Add(couple1); return; } lv_Login.LargeImageList = imglist; ListViewItem male = new ListViewItem("男", 0); ListViewItem female = new ListViewItem("女", 1); ListViewItem couple = new ListViewItem("组合", 2); lv_Login.Items.Add(male); lv_Login.Items.Add(female); lv_Login.Items.Add(couple); } #region 拼音点歌事件 private void tsbtnTool_pinyin_Click(object sender, EventArgs e) { lv_Login.Clear(); lv_Login.Controls.Add(txt); lv_Login.Controls.Add(lbl); txt.Location = new Point(200, 10); txt.Size = new System.Drawing.Size(new Point(150, 18)); txt.Focus(); lbl.Text = "(请输入要查找的歌曲拼音或缩写)"; lbl.Font = new Font("幼圆", 10); lbl.ForeColor = Color.Blue; lbl.Location = new Point(350, 10); lbl.Size = new Size(new Point(250, 18)); txt.TextChanged += txt_TextChanged; lvNew.Location = new Point(-1, 40); lvNew.Size = new Size(680, 580); lvNew.FullRowSelect = true; lvNew.View = View.Details; lvNew.Columns.Clear(); lvNew.Columns.Add("歌曲名称", 300); lvNew.Columns.Add("歌手", 150); lvNew.Columns.Add("点播次数", 100); lvNew.DoubleClick += lvNew_DoubleClick; lv_Login.Controls.Add(lvNew); } //添加三个个控件 TextBox txt = new TextBox(); Label lbl = new Label(); ListView lvNew = new ListView(); //lv_Login的新添项lvNew的Items双击事件 private void lvNew_DoubleClick(object sender, EventArgs e) { //在这里引用歌曲双击事件 int result = Convert.ToInt32(lvNew.SelectedItems[0].Tag); //MessageBox.Show(result.ToString()); DoubleClickSong(result); } //new出的txt的text值改变时事件 private void txt_TextChanged(object sender, EventArgs e) { lvNew.Items.Clear(); string result=""; if (!txt.Text.Trim().Equals(string.Empty)) { foreach (char item in txt.Text) { if (item>='a'&&item<='z') { result += item; result += '%'; }else if (item>='A'&&item<='Z') { result += item.ToString().ToLower(); result += '%'; } } } string str; if (!result.Equals(string.Empty)) { str = @"select song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_ab like '%" + result + "%' and song_info.singer_id = singer_info.singer_id"; } else { return; } try { SqlDataReader dr = db.Dr(str); if (dr.HasRows) { while (dr.Read()) { ListViewItem item = new ListViewItem(dr["song_name"].ToString()); item.Tag = dr["song_id"].ToString(); item.SubItems.Add(dr["singer_name"].ToString()); item.SubItems.Add(dr["song_play_count"].ToString()); lvNew.Items.Add(item); } dr.Close(); } } catch (Exception) { MessageBox.Show("私有连接异常!"); } finally { db.CloseConnection(); } } #endregion //金榜排行按钮点击事件 private void tsbtnTool_order_Click(object sender, EventArgs e) { imglist.Images.Clear(); lv_Login.SmallImageList = imglist; string str = @"select top 10 song_id,song_name,singer_name,song_play_count from song_info,singer_info where song_info.singer_id=singer_info.singer_id order by song_play_count desc"; num = 0; SingerToSongs(str); lv_Login.View = View.List; imglist.ImageSize = new Size(60, 60); try { for (int i = 0; i < 10; i++) { imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\" + i + ".png")); lv_Login.Items[i].ImageIndex = i; } } catch (Exception) { } } //单击字数点歌按钮事件 private void tsbtnTool_counts_Click(object sender, EventArgs e) { //目标lv_Login为字数lv, num为4 num = 4; lv_Login.Clear(); lv_Login.Controls.Clear(); imglist.Images.Clear(); lv_Login.LargeImageList = imglist; imglist.ImageSize = new System.Drawing.Size(60, 60); lv_Login.View = View.LargeIcon; for (int i = 1; i < 11; i++) { imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\" + i + ".png")); ListViewItem item = new ListViewItem((i) + "个字",i-1); item.Tag = i+1; lv_Login.Items.Add(item); } imglist.Images.Add(Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image\N.png")); ListViewItem itemN = new ListViewItem("N个字", 10); itemN.Tag = 11; lv_Login.Items.Add(itemN); } //定时器事件 private void timer_Tick(object sender, EventArgs e) { Playing(); } /// <summary> /// 歌手双击方法 /// </summary> /// <param name="str">查询歌曲语句</param> public void SingerToSongs(string str) { num = 0; lv_Login.View = View.Details; lv_Login.Clear(); lv_Login.Controls.Clear(); lv_Login.Columns.Add("歌曲名称", 300); lv_Login.Columns.Add("歌手", 150); lv_Login.Columns.Add("点播次数", 100); try { SqlDataReader dr = db.Dr(str); if (dr.HasRows) { while (dr.Read()) { ListViewItem item = new ListViewItem(dr["song_name"].ToString()); item.Tag = dr["song_id"].ToString(); item.SubItems.Add(dr["singer_name"].ToString()); item.SubItems.Add(dr["song_play_count"].ToString()); lv_Login.Items.Add(item); } dr.Close(); } } catch (Exception) { MessageBox.Show("私有连接异常!"); } finally { db.CloseConnection(); } } /// <summary> /// 播放列表专属数组 /// </summary> Song[] playing_list = new Song[100]; /// <summary> /// 歌曲双击方法 /// </summary> /// <param name="result">双击歌曲项的Tag值</param> public void DoubleClickSong(int result) { //循环判定 foreach (Song song in playing_list) { if (song!=null && song.SongId == result.ToString()) { MessageBox.Show("已点!"); return; } else if (song==null) { break; } } int i = 0; foreach (Song one in playing_list) { if (one != null) i++; } string str = @"select song_name from song_info where song_id = " + result + ""; try { SqlDataReader dr = db.Dr(str); if (dr.HasRows) { if (dr.Read()) { playing_list[i] = new Song(); playing_list[i].SongName = dr["song_name"].ToString(); playing_list[i].SongId = result.ToString(); } } dr.Close(); } catch (Exception) { MessageBox.Show("私有连接异常!"); } finally { db.CloseConnection(); if (playing_list[i]!=null) { playing_list[i].Songurl = GetSongurlById(result.ToString()); } } ListViewItem item = new ListViewItem(playing_list[i].SongName); ///注意 ///注意 if (i == 0) { item.SubItems.Add("正在播放"); wmp.URL = playing_list[i].Songurl; try { SetPlayCount(playing_list[i].SongId); } catch (Exception ex) { MessageBox.Show(ex.Message); } } else { item.SubItems.Add("未播放"); try { SetPlayCount(playing_list[i].SongId); } catch (Exception ex) { MessageBox.Show(ex.Message); } } item.SubItems.Add(playing_list[i].SongId); item.Tag = playing_list[i].Songurl; lvPlay_list.Items.Add(item); timer.Enabled = true; } /// 当前播放的歌曲在对象数组中的下标 /// </summary> int playingIndex = 0; /// <summary> /// 播放方法 /// </summary> public void Playing() { //重新写 if (wmp.playState==WMPLib.WMPPlayState.wmppsPlaying) { try { //面板信息更改 lblPlaying_name.Text = playing_list[playingIndex].SongName; lblNext_name.Text = playing_list[playingIndex+1].SongName; } catch (Exception) { lblNext_name.Text = "无"; } } else if (wmp.playState == WMPLib.WMPPlayState.wmppsStopped) { try { //状态更新 lvPlay_list.Items[playingIndex].SubItems[1].Text = "已播放"; } catch (Exception) { return; } playingIndex++; //为播放列表的最后一个时,返回index,跳出方法 if (playing_list[playingIndex] == null) { playingIndex--; wmp.URL = string.Empty; return; } wmp.URL = playing_list[playingIndex].Songurl; lvPlay_list.Items[playingIndex].SubItems[1].Text = "正在播放"; //面板提示信息更新 lblPlaying_name.Text = playing_list[playingIndex].SongName; try { lblNext_name.Text = playing_list[playingIndex + 1].SongName; } catch (Exception) { lblNext_name.Text = "无"; } } //歌曲读取异常(为空,或,路径异常) else if (wmp.playState==WMPLib.WMPPlayState.wmppsReady) { if (wmp.URL==string.Empty) { //只要路径为空,只需要判定播放列表是否为空,否则直接播放 if (playing_list[playingIndex] == null) { return; } wmp.URL = playing_list[playingIndex].Songurl; try { lvPlay_list.Items[playingIndex].SubItems[1].Text = "正在播放"; } catch (Exception) { return; } //面板提示信息更新 lblPlaying_name.Text = playing_list[playingIndex].SongName; try { lblNext_name.Text = playing_list[playingIndex +1].SongName; } catch (Exception) { lblNext_name.Text = "无"; } } else { lvPlay_list.Items[playingIndex].SubItems[1].Text = "路径异常"; playingIndex++; //为播放列表的最后一个时,返回index,跳出方法 if (playing_list[playingIndex] == null) { wmp.URL = string.Empty; return; } wmp.URL = playing_list[playingIndex].Songurl; try { lvPlay_list.Items[playingIndex].SubItems[1].Text = "正在播放"; } catch (Exception) { return; } //面板提示信息更新 lblPlaying_name.Text = playing_list[playingIndex].SongName; try { lblNext_name.Text = playing_list[playingIndex + 1].SongName; } catch (Exception) { lblNext_name.Text = "无"; } } } else { return; } } /// <summary> /// 根据歌手id查找歌手图片路径 /// </summary> /// <param name="id">singerId</param> /// <returns>singerPhotoUrl</returns> public string GetSingerurlById(string id) { string str2 = @"select resource_path from resource where resource_type='歌手图片地址'"; string singerphoto_url = db.ScalForString(str2); string str = @"select singer_photo_url from singer_info where singer_id='" + id + "'"; string singer_url = db.ScalForString(str); string sb = singerphoto_url + singer_url; return sb; } /// <summary> /// 根据歌曲id查找歌曲路径 /// </summary> /// <param name="id">songId</param> /// <returns>songUrl</returns> public string GetSongurlById(string id) { string str = @"select resource_path from resource where resource_type = '歌曲地址'"; StringBuilder sb = new StringBuilder(db.ScalForString(str)); string str2 = @"select song_url from song_info where song_id = " + id + ""; sb.Append(db.ScalForString(str2)); return sb.ToString(); } /// <summary> /// 播放次数更新方法 /// </summary> /// <param name="songId">歌曲Id的字符串格式</param> /// <returns>是否成功</returns> public bool SetPlayCount(string songId) { int result; string str1 = @"select song_play_count from song_info where song_id=" + songId + ""; try { result = Convert.ToInt32(db.Scal(str1)); } catch (Exception) { result = 0; } result++; string str = @"update song_info set song_play_count = " + result + " where song_id=" + songId + ""; if (db.Non(str)>0) { return true; } else { return false; } } /// <summary> /// new国家lv_Login方法 /// </summary> private void GetSingerType() { lv_Login.Clear(); lv_Login.Controls.Clear(); imglist.Images.Clear(); lv_Login.View = View.LargeIcon; lv_Login.LargeImageList = imglist; string str1 = @"select count(1) from singer_type"; int result; try { result = Convert.ToInt32(db.Scal(str1)); } catch (Exception) { return; } string str = @"select singertype_id, singertype_name from singer_type"; try { SqlDataReader dr = db.Dr(str); if (dr.HasRows) { for (int i = 0; i < result; i++) { dr.Read(); Image img; try { img = Image.FromFile(@"D:\课程\S1\KTV\MyKTV\image" + Convert.ToString(dr["singertype_name"]) + ".png"); } catch (Exception) { img = Image.FromFile("D:\\课程\\S1\\KTV\\MyKTV\\image\\singer_temp.jpg"); } imglist.Images.Add(img); ListViewItem item = new ListViewItem(dr["singertype_name"].ToString(),i); item.Tag = Convert.ToString(dr["singertype_id"]); lv_Login.Items.Add(item); } } dr.Close(); } catch (Exception) { MessageBox.Show("歌手地区读取异常!"); } finally { db.CloseConnection(); } } /// <summary> /// 获取歌手信息 /// </summary> /// <param name="strCounts">条件下歌手个数查询语句</param> /// <param name="str">条件下歌手信息查询语句</param> private void GetSinger(string strCounts, string str) { //歌手lv的目标lv为歌曲 num = 1; imglist.Images.Clear(); lv_Login.Clear(); lv_Login.Controls.Clear(); lv_Login.View = View.LargeIcon; //确定大图标的图像列表对象 lv_Login.LargeImageList = imglist; imglist.ImageSize = new System.Drawing.Size(72, 128); int result = db.ScalForInt(strCounts); SqlCommand comm = new SqlCommand(str, db.conn); //new出对象数组,用于存储目标表格信息 Song[] song = new Song[result]; try { db.OpenConnection(); SqlDataReader dr = comm.ExecuteReader(); if (dr != null) if (dr.HasRows) { for (int i = 0; i < result; i++) { if (dr.Read()) { //读取了歌手id,歌手名称 song[i] = new Song(); song[i].SingerId = dr["singer_id"].ToString(); song[i].SingerName = dr["singer_name"].ToString(); } } dr.Close(); } } catch (Exception) { MessageBox.Show("私有连接异常!"); } finally { db.CloseConnection(); }
//改变imagelist的图片大小:imglist.ImageSize = new Size(32, 32);
//循环读出图片url,加载对应图片到imglist,给items组合项添加对象数组中每一项 for (int i = 0; i < result; i++) { song[i].SingerPhoto = GetSingerurlById(song[i].SingerId); Image img; //亮点 try { img = Image.FromFile(song[i].SingerPhoto); } catch (Exception) { img = Image.FromFile("D:\\课程\\S1\\KTV\\MyKTV\\image\\singer_temp.jpg"); } imglist.Images.Add(img); ListViewItem item = new ListViewItem(song[i].SingerName, i); item.Tag = song[i].SingerId; lv_Login.Items.Add(item); } } #region 删除播放列表歌曲,双击播放 ////删除选中歌曲按钮事件 private void btnDel_Click(object sender, EventArgs e) { int result; try { result = Convert.ToInt32(lvPlay_list.SelectedItems[0].Index); } catch (Exception) { return; } //清空对象数组与列表 lvPlay_list.SelectedItems[0].Remove(); ///亮点 if (result == playingIndex) {
try { if (playing_list[result + 1] != null) { for (int i = result + 1; i < playing_list.Length; i++) { playing_list[i - 1].SongId = playing_list[i].SongId; playing_list[i - 1].SongName = playing_list[i].SongName; playing_list[i - 1].Songurl = playing_list[i].Songurl; } wmp.URL = playing_list[result].Songurl; } else { playing_list[result] = playing_list[result + 1]; wmp.URL = string.Empty; } } catch (Exception) { wmp.URL = string.Empty; } } } ////双击播放列表组件时 private void lvPlay_list_DoubleClick(object sender, EventArgs e) { try { wmp.URL = playing_list[Convert.ToInt32(lvPlay_list.SelectedItems[0].Index)].Songurl; lvPlay_list.Items[playingIndex].SubItems[1].Text = "已播放"; playingIndex = Convert.ToInt32(lvPlay_list.SelectedItems[0].Index); lvPlay_list.Items[playingIndex].SubItems[1].Text = "正在播放"; } catch (Exception) { return; } } ////列表循环方式按钮点击事件 private void btnState_Click(object sender, EventArgs e) { // Timer timeResult = new Timer(); // if (btnState.Text=="列表循环模式") // { // btnState.Text = "单曲循环模式"; // timer.Enabled = false; // timeResult.Enabled = true; // timeResult.Interval = 1000; // timeResult.Tick += timeResult_Tick; // } // else if (btnState.Text=="单曲循环模式") // { // btnState.Text = "无循环模式"; // timer.Enabled = true; // timeResult.Enabled = false; // } // else if (btnState.Text=="无循环模式") // { // btnState.Text = "列表循环模式"; // timer.Enabled = false; // timeResult.Enabled = true; // timeResult.Interval = 1000; // timeResult.Tick += timeResult_Tick; // } } ////附加定时器事件 void timeResult_Tick(object sender, EventArgs e) {
// if (wmp.playState==WMPLib.WMPPlayState.wmppsStopped&&btnState.Text=="单曲循环模式") // { // wmp.URL = playing_list[playingIndex].Songurl; // } // else if (btnState.Text=="列表循环模式") // { // int result=-1; // foreach (Song item in playing_list) // { // if (item!=null) // { // result++; // } // else // { // break; // } // } // if (playingIndex==result) // { // playingIndex = 0; // } // } } #endregion
用C#,SQL Server编写的音乐播放软件的更多相关文章
- SQL Server中的CLR编程——用.NET为SQL Server编写存储过程和函数
原文:SQL Server中的CLR编程--用.NET为SQL Server编写存储过程和函数 很早就知道可以用.NET为SQL Server2005及以上版本编写存储过程.触发器和存储过程的,不过之 ...
- sql server编写通用脚本自动统计各表数据量心得
工作过程中,如果一个数据库的表比较多,手工编写统计脚本就会比较繁琐,于是摸索出自动生成各表统计数据量脚本的通用方法,直接上代码: /* 脚本来源:https://www.cnblogs.com/zha ...
- sql server编写简洁四则运算表达式脚本实现计算批次功能（C#等其它编程语言也能直接用此通用表达式）
问题: 在数据库编程开发中,有时会遇到数据量比较大的情况,如果直接大批量进行添加数据.修改数据.删除数据,就会是比较大的事务,事务日志也比较大,耗时久的话会对正常操作造成一定的阻塞.虽不至于达到删库跑 ...
- 安装 SQL Server 2005 的硬件和软件要求(官方全面)
SQL Server 2005 安装要求 本主题介绍了安装 SQL Server 205 的硬件和软件要求,以及查看安装文档的说明. 硬件和软件要求(32 位和 64 位) 访问 SQL Server ...
- sql server编写脚本求解第1天1分钱之后每天两倍持续一个月的等比数列问题
一.问题 问题1 场景:如果你未来的丈母娘要求你,第1天给她1分钱,第2天给2分钱,第3天给4分钱,以此类推,每天给前一天的2倍,给1个月(按30天)算就行.问:第30天给多少钱,总共给多少钱? 问题 ...
- Sql server 编写99乘法表
Sql 组织编写语句 declare @one int,@tow int,@str varchar(100),@num intselect @one=1while(@one<=9)beginse ...
- 安装 SQL Server 2012 的硬件和软件要求(官方全面)
以下各节列出了安装和运行 SQL Server 2012 的最低硬件和软件要求. 有关 SharePoint 集成模式下 Analysis Services 的要求的详细信息,请参阅硬件和软件要求(S ...
- sql server编写archive通用模板脚本实现自动分批删除数据
博主做过比较多项目的archive脚本编写,对于这种删除数据的脚本开发,肯定是一开始的话用最简单的一个delete语句,然后由于部分表数据量比较大啊,索引比较多啊,会发现删除数据很慢而且影响系统的正常 ...
- sql server编写一个语句脚本自动清空各表数据以初始化数据库
问题:有时已有项目要移植,例如原来在广州地区使用的某系统,突然说惠州那边也要用这套一样的系统.或者,在demo环境下弄了一些测试数据.然后要清空全部表数据.如果表比较多的话,逐个表手工编写脚本就太麻烦 ...
随机推荐
- jquery点击获取子元素ID值
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/ ...
- 杭电ACM1004
Let the Balloon Rise Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Oth ...
- Python 中的数据结构总结（一）
Python 中的数据结构 “数据结构”这个词大家肯定都不陌生,高级程序语言有两个核心,一个是算法,另一个就是数据结构.不管是c语言系列中的数组.链表.树和图,还是java中的各种map,随便抽出一个 ...
- java数据结构_笔记(5)_图的算法
图的算法 1 图的遍历图的遍历就是从图中某个顶点出发,按某种方法对图中所有顶点访问且仅访问一次.遍历算法是求解图的连通性问题.拓扑排序和求关键路径等算法的基础. 2 深度优先遍历从图中某个顶点V 出发 ...
- VMware-workstation-full-12.0.0-2985596&VMware-player-12.0.0-2985596
VMware-workstation-full-12.0.0-2985596 永久KEY:YV3D2-A0D50-481XP-KPNGE-ZV2ZF VMware-player-12.0.0-2985 ...
- Read Excel file from C#
Common way is: var fileName = string.Format("{0}\\fileNameHere", Directory.GetCurrentDirec ...
- iOS学习之设计模式
iOS开发学习中,经常弄不清楚ios的开发模式,今天我们就来进行简单的总结和探讨~ (一)代理模式 应用场景:当一个类的某些功能需要由别的类来实现,但是又不确定具体会是哪个类实现. 优势:解耦合 敏捷 ...
- position属性的四个value
As we all know, position属性有四个值,分别为 relative,fixed,absolute, static. 1,relative相对定位 (不会脱离文档流) 在一个相对定位 ...
- 团队第二周：SRS文档
项目计划: 对于这次的实验,我们组计划进行一个图书管理系统的项目书写,在第一阶段,对该项目先进行一下规划,总结该项目的注意事项以及实验要求,并加以实施. 下面我先对我们项目的要求坐一下说明: 1定义五 ...
- Error running app: This version of Android Studio is incompatible with the Gradle Plugin used. Try disabling Instant Run.
转自:http://blog.csdn.net/qq_15807167/article/details/51984920 参考:http://stackoverflow.com/questions/3 ...