.net数据库实现Excel的导入与导出

.net数据库实现Excel的导入与导出

参考路径：https://www.cnblogs.com/splendidme/archive/2012/01/05/2313314.html

1.default.aspx文件

 <form id="form1" runat="server">
     <table style="width: 858px">
         <tr>
             <td style="width: 334px">
                 <asp:Button ID="readFromDB" runat="server"

 OnClick="readFromDB_Click" Text="从数据库读取数据" />
                 <asp:GridView ID="GridView1" runat="server"

 AutoGenerateColumns="True" BackColor="White" BorderColor="#E7E7FF"

 BorderStyle="None" BorderWidth="1px" CellPadding="" Font-Names="Arial"

 Font-Size="12px" GridLines="Horizontal" RowStyle-HorizontalAlign="Center"

 Width="98%">
                 <FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />

 <RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C"

 HorizontalAlign="Center" />
                 <SelectedRowStyle BackColor="#738A9C" Font-Bold="True"

 ForeColor="#F7F7F7" />
                 <PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C"

 HorizontalAlign="Right" />
                 <HeaderStyle BackColor="#4A3C8C" Font-Bold="True"

 ForeColor="#F7F7F7" HorizontalAlign="Center" />
                 <AlternatingRowStyle BackColor="#F7F7F7" /> </asp:GridView>
                 <asp:FileUpload ID="FileUpload1" runat="server" />
                 <asp:Button ID="Import" runat="server" OnClick="Import_Click" Text="

 导入" />
                 <asp:Button ID="output" runat="server" OnClick="btnOut_Click" Text="

 导出" />
             </td>
         </tr>
     </table>
     </form>

2.default.aspx.cs文件

 using System;
 using System.Data;
 using System.Configuration;
 using System.Collections;
 using System.Web;
 using System.Web.Security;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 using System.Web.UI.WebControls.WebParts;
 using System.Web.UI.HtmlControls;
 using System.Data.SqlClient;
 using System.Data.OleDb;
 using System.Text;
 using JJoobb.Web;
 using System.IO;
 public partial class _Default : System.Web.UI.Page
 {
     string strConn = SiteSetting.ConnectionString;
     string sqlSelectALL = SiteSetting.sqlSelALL;
     string exToDB = SiteSetting.ExToDB;
     protected void Page_Load(object sender, EventArgs e)
     {

     }
     protected void readFromDB_Click(object sender, EventArgs e)
     {
         Bind();
     }
     public void btnOut_Click(object sender, EventArgs e)
     {
         try
         {
             CreateExcel(getds());
             Response.Write("<script>alert('数据导出成功!')</script>");
         }
         catch
         {
             Response.Write("<script>alert('数据导出失败!')</script>");
         }
     }
     public void CreateExcel(DataSet ds)
     {
         string outPutPath=SiteSetting.OutPutPath +DateTime.Now.ToString

 ("yyyyMMddHHmmss-")+SiteSetting.FileName;
         FileStream file = new FileStream(outPutPath, FileMode.Create);
         StreamWriter sw = new StreamWriter(file,Encoding.Default);//设置编码为当

 面页面编码
         string colHeaders = "", ls_item = "";
         //定义表对象与行对象，同时用DataSet对其值进行初始化
         DataTable dt = ds.Tables[];
         DataRow[] myRow = dt.Select();//可以类似dt.Select("id>10")之形式达到数

 据筛选目的
         int i = ;
         int cl = dt.Columns.Count;
         //取得数据表各列标题，各标题之间以\t分割，最后一个列标题后加回车

 符
         for (i = ; i < cl; i++)
         {
             if (i == (cl - ))//最后一列，加\n
             {
                 colHeaders += dt.Columns[i].Caption.ToString() + "\n";
             }
             else
             {
                 colHeaders += dt.Columns[i].Caption.ToString() + "\t";
             }
         }
         sw.Write(colHeaders);
         foreach (DataRow row in myRow)
         {
             //当前行数据写入输出流，并且置空ls_item以便下行数据
             for (i = ; i < cl; i++)
             {
                 if (i == (cl - ))
                 {
                     ls_item += row[i].ToString() + "\n";
                 }
                 else
                 {
                     ls_item += row[i].ToString() + "\t";
                 }
             }
             sw.Write(ls_item);
             ls_item = "";
         }
         sw.Flush();
         sw.Close();
         file.Close();
     }

     //从数据库取出要导出的Detset数据集
     private DataSet getds()
     {
         SqlConnection conns = new SqlConnection(strConn);
         SqlDataAdapter da = new SqlDataAdapter(sqlSelectALL, conns);
         DataSet ds = new DataSet();
         da.Fill(ds);
         conns.Close();
         conns.Dispose();
         return ds;
     }
     //绑定数据
     public void Bind()
     {
         DataSet ds = new DataSet();
         using (SqlConnection conn = new SqlConnection())
         {
             SqlDataAdapter sda = new SqlDataAdapter(sqlSelectALL, strConn);
             sda.Fill(ds, "ex_test");
         }
         GridView1.DataSource = ds.Tables["ex_test"];
         GridView1.DataBind();
     }
     //导入数据
     protected void Import_Click(object sender, EventArgs e)
     {
         string getErrMsg = "";
         DataSet excelDs = new DataSet();
         if (FileUpload1.PostedFile.FileName == "")
         {
             Response.Write("<script language=javascript>alert('请选择要上传的文件

 ！');</script>");
             return;
         }
         //从Excel读取数据
         string filePath = FileUpload1.PostedFile.FileName;
         string connString = exToDB + filePath;
         OleDbConnection excelConn = new OleDbConnection(connString);
         OleDbDataAdapter ExcelDA = new OleDbDataAdapter("SELECT * FROM

 [Sheet1$]", excelConn);
         try
         {
             ExcelDA.Fill(excelDs, "ex_test");
         }
         catch (Exception err)
         {
             Response.Write(err.Message);
         }
         finally
         {
             excelConn.Close();
             excelConn = null;
         }
         //将数据写入数据库
         if (excelDs.Tables[].Rows.Count != )
         {
             SqlConnection sqlConn = new SqlConnection(strConn);
             sqlConn.Open();
             SqlCommand myCommand = sqlConn.CreateCommand();
             SqlTransaction myTrans = sqlConn.BeginTransaction();
             myCommand.Transaction = myTrans;
             try
             {
                 for (int i = ; i < excelDs.Tables[].Rows.Count; i++)
                 {
                     string sql = "insert into ex_test(id, name, sex,email,address) values('"

 + excelDs.Tables[].Rows[i]["编号"].ToString() + "','" + excelDs.Tables[].Rows[i]["

 姓名"].ToString() + "','" + excelDs.Tables[0].Rows[i]["性别"].ToString() + "','" +

 excelDs.Tables[].Rows[i]["邮箱"].ToString() + "','" + excelDs.Tables[].Rows[i]["地

 址"].ToString() + "')";
                     myCommand.CommandText = sql; myCommand.ExecuteNonQuery();
                 }
                 myTrans.Commit();
             }
             catch (Exception ex)
             {
                 getErrMsg = ex.Message.ToString();
                 Response.Write(ex.Message.ToString());
                 myTrans.Rollback();
             }
             finally
             {
                 sqlConn.Close();
                 sqlConn = null;
             }

         }
         //返回提示信息
         if (getErrMsg == "" || getErrMsg == null)
         {
             Response.Write("<script language='Javascript'>alert('导入成功！')

 </script>");
             Bind();
         }
         else
         {
             Response.Write("<script language='Javascript'>alert('导入失败！')

 </script>");
             return;
         }
     }

 }

3.SiteSetting.cs

 using System;
 using System.Configuration;
 using System.Collections.Generic;
 using System.Text;

 /// <summary>
 /// SiteSetting 的摘要说明
 /// </summary>
 namespace JJoobb.Web
 {
     public class SiteSetting
     {
         //数据库连接字符串
         public static string ConnectionString =

 ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString;

         //导出文件名称
         public static string FileName = "OutPut.xls";

         //导出文件地址
         public static string OutPutPath = "C:\\Documents and

 Settings\\Administrator\\桌面\\excleFile\\";

         //sql语句
         public static string sqlSelALL = "select

 id,title,contents,userName,phone,email,CONVERT(varchar(), AddDate, )

 AddDate,ReContents from Feedback";

         //从excel读数据
         public static string ExToDB = "Provider=Microsoft.Jet.OLEDB.4.0;Extended

 Properties=\"Excel 8.0;HDR=Yes;IMEX=1\";Data Source=";
     }
 }

4.web.config

<connectionStrings>
<add name="connectionString"

connectionString="server=local;uid=sa;pwd=pwd;database=TestExcel"

providerName="System.Data.SqlClient"/>
</connectionStrings>