最近剛好有人討論到這個問題...

小弟到網路上找了一下資料...其實還滿多資料的...

小弟做了一個簡單的範例..如何由GridView匯出資料至excel,word,txt

ps.註解的部分屬於儲存檔案的程式碼

excel.aspx
1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="excel.aspx.cs" Inherits="excel" %>  
2  
3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
4  
5 <html xmlns="http://www.w3.org/1999/xhtml" >  
6 <head runat="server">  
7     <title>未命名頁面</title>  
8 </head>  
9 <body>  
10     <form id="form1" runat="server">  
11     <div>  
12         <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1">  
13             <Columns>  
14                 <asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True" 
15                     SortExpression="id" />  
16                 <asp:BoundField DataField="gender" HeaderText="gender" SortExpression="gender" />  
17             </Columns>  
18         </asp:GridView>  
19         <asp:Button ID="ExportExcel" runat="server" Text="匯出Excel檔/儲存Excel檔" OnClick="ExportExcel_Click" Width="200px" /><br />  
20         <asp:Button ID="ExportWord" runat="server" Text="匯出Word檔/儲存Word檔" OnClick="ExportWord_Click" Width="200px" /><br />  
21         <asp:Button ID="ExportText" runat="server" Text="匯出txt檔/儲存txt檔" Width="200px" OnClick="ExportText_Click" />  
22         <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DatabaseConnectionString %>" 
23             SelectCommand="SELECT * FROM [user]"></asp:SqlDataSource>  
24     </div>  
25     </form>  
26 </body>  
27 </html> 
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excel.aspx.cs
1 using System;  
2 using System.Data;  
3 using System.Configuration;  
4 using System.Collections;  
5 using System.Web;  
6 using System.Web.Security;  
7 using System.Web.UI;  
8 using System.Web.UI.WebControls;  
9 using System.Web.UI.WebControls.WebParts;  
10 using System.Web.UI.HtmlControls;  
11  
12 public partial class excel : System.Web.UI.Page  
13 {  
14     protected void Page_Load(object sender, EventArgs e)  
15     {  
16  
17     }  
18     protected void ExportExcel_Click(object sender, EventArgs e)  
19     {  
20         //匯出excel檔  
21         Response.Clear();  
22         Response.AddHeader("content-disposition", "attachment;filename=test.xls");//excel檔名  
23         Response.ContentType = "application/vnd.ms-excel";  
24         Response.Charset = "";  
25         System.IO.StringWriter sw = new System.IO.StringWriter();  
26         System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);  
27         DataGrid dg = new DataGrid();  
28         dg.DataSource = this.SqlDataSource1.Select(DataSourceSelectArguments.Empty);  
29         dg.DataBind();  
30         dg.RenderControl(htw);  
31         Response.Write(sw.ToString());  
32         Response.End();  
33  
34  
35         //儲存excel檔  
36         //System.IO.StringWriter sw = new System.IO.StringWriter();  
37         //System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);  
38         //DataGrid dg = new DataGrid();  
39         //dg.DataSource = this.SqlDataSource1.Select(DataSourceSelectArguments.Empty);  
40         //dg.DataBind();  
41         //dg.RenderControl(htw);  
42         //System.IO.File.WriteAllText(@"c:\test.xls", sw.ToString());  
43     }  
44     protected void ExportWord_Click(object sender, EventArgs e)  
45     {  
46         //匯出word檔  
47         Response.Clear();  
48         Response.AddHeader("content-disposition", "attachment;filename=test.doc");//word檔名  
49         Response.ContentType = "application/vnd.ms-word";  
50         Response.Charset = "";  
51         System.IO.StringWriter sw = new System.IO.StringWriter();  
52         System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);  
53         DataGrid dg = new DataGrid();  
54         dg.DataSource = this.SqlDataSource1.Select(DataSourceSelectArguments.Empty);  
55         dg.DataBind();  
56         dg.RenderControl(htw);  
57         Response.Write(sw.ToString());  
58         Response.End();  
59  
60  
61         //儲存word檔  
62         //System.IO.StringWriter sw = new System.IO.StringWriter();  
63         //System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);  
64         //DataGrid dg = new DataGrid();  
65         //dg.DataSource = this.SqlDataSource1.Select(DataSourceSelectArguments.Empty);  
66         //dg.DataBind();  
67         //dg.RenderControl(htw);  
68         //System.IO.File.WriteAllText(@"c:\test.doc", sw.ToString());  
69     }  
70     protected void ExportText_Click(object sender, EventArgs e)  
71     {  
72         //匯出txt檔  
73         Response.Clear();  
74         Response.AddHeader("content-disposition", "attachment;filename=test.txt");//txt檔名  
75         Response.ContentType = "application/vnd.ms-word";  
76         Response.Charset = "";  
77         System.Text.StringBuilder sb = new System.Text.StringBuilder();  
78         DataTable dt = new DataTable();  
79         dt = ((DataView)this.SqlDataSource1.Select(DataSourceSelectArguments.Empty)).ToTable();  
80         //欄位名  
81         for (int i = 0; i < dt.Columns.Count; i++)  
82         {  
83             sb.Append(dt.Columns[i].ColumnName);  
84             sb.Append(",");  
85         }  
86         sb.Append(Environment.NewLine);  
87         //資料  
88         for (int i = 0; i < dt.Rows.Count; i++)  
89         {  
90             for (int j = 0; j < dt.Columns.Count; j++)  
91             {  
92                 sb.Append(dt.Rows[i][j].ToString());  
93                 sb.Append(",");  
94             }  
95             sb.Append(Environment.NewLine);  
96         }  
97         Response.Write(sb.ToString());  
98         Response.End();  
99  
100  
101         //儲存txt檔  
102         //System.Text.StringBuilder sb = new System.Text.StringBuilder();  
103         //DataTable dt = new DataTable();  
104         //dt = ((DataView)this.SqlDataSource1.Select(DataSourceSelectArguments.Empty)).ToTable();  
105         ////欄位名  
106         //for (int i = 0; i < dt.Columns.Count; i++)  
107         //{  
108         //    sb.Append(dt.Columns[i].ColumnName);  
109         //    sb.Append(",");  
110         //}  
111         //sb.Append(Environment.NewLine);  
112         ////資料  
113         //for (int i = 0; i < dt.Rows.Count; i++)  
114         //{  
115         //    for (int j = 0; j < dt.Columns.Count; j++)  
116         //    {  
117         //        sb.Append(dt.Rows[i][j].ToString());  
118         //        sb.Append(",");  
119         //    }  
120         //    sb.Append(Environment.NewLine);  
121         //}  
122         //System.IO.File.WriteAllText(@"c:\test.txt", sb.ToString());  
123     }  
124 }  
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參考來源： http://www.codersource.net/published/view/283/exporting_data_grid_to_excel.aspx