winform —— 对话框和流及打印

对话框：  注意引用using System.IO;
showdialog();显示对话框，返回一个dialogresult的枚举类型

colorDialog：color属性，用来获取颜色
folderBrowserDialog:SelectedPath选中路径
fontDialog:font属性，返回一个font类型的值，里面存储了关于字体的设置
openFileDialog:
filename获取或设置文件路径包含文件名
filenames 是文件路径字符串数组
filter:文件筛选器 格式为 提示文本一|*.后缀|提示文本二|*.后缀|提示文本三|*.后缀
saveFileDialog1:
filename获取或设置文件路径包含文件名
filenames 是文件路径字符串数组
filter:文件筛选器 格式为 提示文本一|*.后缀|提示文本二|*.后缀|提示文本三|*.后缀

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.IO;

 namespace WindowsFormsApplication6
 {
     public partial class Form1 : Form
     {
         public Form1()
         {
             InitializeComponent();
         }
         //颜色
         private void button1_Click(object sender, EventArgs e)
         {
             DialogResult dr = colorDialog1.ShowDialog();
             if (dr == DialogResult.OK)
             {
                 this.BackColor = colorDialog1.Color;
             }
         }
         //文件夹浏览器
         private void button2_Click(object sender, EventArgs e)
         {
            DialogResult dr = folderBrowserDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                MessageBox.Show(folderBrowserDialog1.SelectedPath);
            }
            else
            {
                MessageBox.Show(folderBrowserDialog1.SelectedPath);
            }
         }
         //字体
         private void button3_Click(object sender, EventArgs e)
         {
             fontDialog1.ShowDialog();
             MessageBox.Show(fontDialog1.Font.Size.ToString());
         }
         //打开
         private string Files;
         private void button4_Click(object sender, EventArgs e)
         {
             DialogResult dr = openFileDialog1.ShowDialog();
             if (DialogResult.OK == dr)
             {
                 string filename = openFileDialog1.FileName;
                 StreamReader sr = new StreamReader(filename);
                 textBox1.Text = sr.ReadToEnd();
                 sr.Close();

                 Files = filename;
             }
         }
         //保存
         private void button5_Click(object sender, EventArgs e)
         {
             if (Files == null)
             {
                 saveFileDialog1.Filter = "文本 |*.txt|word|*.doc|excel|*.xls";
                 DialogResult dr = saveFileDialog1.ShowDialog();
                 if (dr == DialogResult.OK)
                 {
                     string filename = saveFileDialog1.FileName;

                     StreamWriter sw = new StreamWriter(filename);
                     sw.Write(textBox1.Text);
                     sw.Close();
                 }
             }
             else
             {
                 StreamWriter sw = new StreamWriter(Files);
                 sw.Write(textBox1.Text);
                 sw.Close();
             }
         }

         private void Form1_Load(object sender, EventArgs e)
         {

         }
         //关闭窗体
         private void button6_Click(object sender, EventArgs e)
         {
             this.Close();
         }
         //页面设置
         private void button7_Click(object sender, EventArgs e)
         {
             pageSetupDialog1.Document = printDocument1;
             pageSetupDialog1.ShowDialog();
         }
         //打印
         private void button8_Click(object sender, EventArgs e)
         {
             printDialog1.Document = printDocument1;
             DialogResult dr = printDialog1.ShowDialog();
             if (dr == DialogResult.OK)
             {
                 printDocument1.Print();
             }
         }

         private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
         {
             System.Drawing.Font f = new System.Drawing.Font("宋体",);
             e.Graphics.DrawString(textBox1.Text,f,System.Drawing.Brushes.Aqua,,);
         }
     }
 }

流：
输入流：

string filename = openFileDialog1.FileName;
//通过读入流进行文件读取
StreamReader sr = new StreamReader(filename);
textBox1.Text = sr.ReadToEnd();
sr.Close();

输出流：

string filename = saveFileDialog1.FileName;
//写入流，可以在硬盘上创建文件，并为文件写入信息
StreamWriter sw = new StreamWriter(filename);
sw.Write(this.textBox1.Text);
sw.Close();
this:代表的它所在的那个类当前对象

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.IO;

 namespace FirstForm
 {
     public partial class JiShiben : Form
     {
         public JiShiben()
         {
             InitializeComponent();
         }

         private void textBox1_TextChanged(object sender, EventArgs e)
         {
             //MessageBox.Show("你好");
             if (this.textBox1.Text.Length > )
             {
                 撤销ToolStripMenuItem.Enabled = true;
             }
         }

         private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             textBox1.Copy();
         }

         private void 粘贴ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             textBox1.Paste();
         }

         private void 剪切ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             textBox1.Cut();
         }

         private void 撤销ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             if (textBox1.CanUndo == true)
             {
                 // Undo the last operation.
                 textBox1.Undo();
                 // Clear the undo buffer to prevent last action from being redone.
                 textBox1.ClearUndo();
             }
         }

         private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             textBox1.SelectedText = "";
         }

         private void 全选ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             textBox1.SelectAll();
         }

         private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
         {
            DialogResult dr =  openFileDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                string filename = openFileDialog1.FileName;
                //通过读入流进行文件读取
                StreamReader sr = new StreamReader(filename);
                textBox1.Text = sr.ReadToEnd();
                sr.Close();
            }
         }

         private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             if (this.textBox1.Text.Length > )
             {
                DialogResult drg= MessageBox.Show("是否进行保存?","保存对话框",MessageBoxButtons.YesNo);
                if (DialogResult.Yes == drg)
                {
                    if (FileName == null)
                    {
                        DialogResult dr = saveFileDialog1.ShowDialog();
                        if (dr == DialogResult.OK)
                        {
                            string filename = saveFileDialog1.FileName;
                            //写入流，可以在硬盘上创建文件，并为文件写入信息
                            StreamWriter sw = new StreamWriter(filename);
                            sw.Write(this.textBox1.Text);
                            sw.Close();
                        }
                    }
                    else
                    {
                        //写入流，可以在硬盘上创建文件，并为文件写入信息
                        StreamWriter sw = new StreamWriter(FileName);
                        sw.Write(this.textBox1.Text);
                        sw.Close();
                    }
                }
             }

             FileName = null;
             this.textBox1.Text = "";
         }
         private string FileName;
         private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             if (FileName == null)
             {
                 DialogResult dr = saveFileDialog1.ShowDialog();
                 if (dr == DialogResult.OK)
                 {
                     string filename = saveFileDialog1.FileName;
                     //写入流，可以在硬盘上创建文件，并为文件写入信息
                     StreamWriter sw = new StreamWriter(filename);
                     sw.Write(this.textBox1.Text);
                     sw.Close();
                 }
             }
             else
             {
                 //写入流，可以在硬盘上创建文件，并为文件写入信息
                 StreamWriter sw = new StreamWriter(FileName);
                 sw.Write(this.textBox1.Text);
                 sw.Close();
             }
         }

         private void 另存为ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             saveFileDialog1.Filter = "文本文件(*.txt)|*.txt|word文件(*.doc)|*.doc";
             DialogResult dr = saveFileDialog1.ShowDialog();
             if (dr == DialogResult.OK)
             {
                 string filename = saveFileDialog1.FileName;
                 //写入流，可以在硬盘上创建文件，并为文件写入信息
                 StreamWriter sw = new StreamWriter(filename);
                 sw.Write(this.textBox1.Text);
                 sw.Close();
             }
         }

         private void 页面设置ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             pageSetupDialog1.Document = printDocument1;//为页面设置对话框指定打印对象
             pageSetupDialog1.ShowDialog();//打开页面对话框
         }

         private void 打印ToolStripMenuItem_Click(object sender, EventArgs e)
         {
            DialogResult dr =  printDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                printDocument1.Print();
            }
         }

         private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
         {
             //设置打印的画板内容
             System.Drawing.Font f = new System.Drawing.Font("宋体", );
             e.Graphics.DrawString(this.textBox1.Text, f, SystemBrushes.ActiveBorder, 10.0f, 0f);
         }

         private void 查找ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             //Find ff = new Find(this.textBox1.SelectedText,this);
             //ff.Owner = this;
             //ff.Show();
         }

         private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
         {
             this.Close();
         }

         private void JiShiben_Load(object sender, EventArgs e)
         {

         }
     }
 }

打印：
打印对话框：printdialog
页面设置：pagesetupdialog
这两个对话框都需要通过设置printdocument来指定打印对象
printdocument：打印对象，必须要有，一块画板，用于打印机与打印内容之间中转，打印机打印的是printdoment
printDocument1_PrintPage:事件，每打印一页之前触发，用于给printdocument指定打印内容
通过画板把内容画到打印对象的页上：
System.Drawing.Font f = new System.Drawing.Font("宋体",12);
e.Graphics.DrawString(textBox1.Text,f,System.Drawing.Brushes.Aqua,5,5);
最后打印： 打印对话框那，如果打印对话框返回确定打印，就执行printdocument.print();