ASP.NET 2.0中将 GridView 导出到 Excel 文件中
下面代碼實(shí)現(xiàn)將 GridView 導(dǎo)出到 Excel文件中。
值得注意的是VerifyRenderingInServerForm重載方法：
MSDN上的 VerifyRenderingInServerForm 方法的描述：
必須位于 <form runat=server> 標(biāo)記中的控件可以在呈現(xiàn)之前調(diào)用此方法，以便在控件被置于標(biāo)記外時(shí)顯示錯(cuò)誤信息。發(fā)送回或依賴于注冊的腳本塊的控件應(yīng)該在 Control.Render 方法的重寫中調(diào)用此方法。呈現(xiàn)服務(wù)器窗體元素的方式不同的頁可以重寫此方法以在不同的條件下引發(fā)異常。
如果回發(fā)或使用客戶端腳本的服務(wù)器控件沒有包含在 HtmlForm 服務(wù)器控件 (<form runat="server">) 標(biāo)記中，它們將無法正常工作。這些控件可以在呈現(xiàn)時(shí)調(diào)用該方法，以在它們沒有包含在 HtmlForm 控件中時(shí)提供明確的錯(cuò)誤信息。
開發(fā)自定義服務(wù)器控件時(shí)，通常在為任何類型的輸入標(biāo)記重寫 Render 方法時(shí)調(diào)用該方法。這在輸入控件調(diào)用 GetPostBackEventReference 或發(fā)出客戶端腳本時(shí)尤其重要。復(fù)合服務(wù)器控件不需要作出此調(diào)用。
沒有這個(gè)方法，程序?qū)?bào)錯(cuò)。
C# 代碼
?
<%@ Page Language="C#" EnableEventValidation="false" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
?"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
? ICollection CreateDataSource( )
? {
??? System.Data.DataTable dt = new System.Data.DataTable();
??? System.Data.DataRow dr;
??? dt.Columns.Add(new System.Data.DataColumn("id", typeof(Int32)));
??? dt.Columns.Add(new System.Data.DataColumn("PkID", typeof(string)));
??? dt.Columns.Add(new System.Data.DataColumn("Title", typeof(string)));
??? for (int i = 0; i < 6; i++)
??? {
????? dr = dt.NewRow();
????? dr[0] = i;
????? dr[1] = "123456789123456789123456789";
????? dr[2] = "<a href='http://dotnet.aspx.cc/'>歡迎光臨【孟憲會(huì)之精彩世界】</a>";
????? dt.Rows.Add(dr);
??? }
??? System.Data.DataView dv = new System.Data.DataView(dt);
??? return dv;
? }
? protected void Page_Load( object sender, EventArgs e )
? {
??? if (!IsPostBack)
??? {
????? GridView1.BorderWidth = Unit.Pixel(2);
????? GridView1.BorderColor = System.Drawing.Color.DarkOrange;
????? GridView1.DataSource = CreateDataSource();
????? GridView1.DataBind();
??? }
? }
? protected void Button1_Click( object sender, System.EventArgs e )
? {
??? Response.Clear();
??? Response.Buffer = true;
??? Response.Charset = "GB2312";
??? Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls");
??? // 如果設(shè)置為 GetEncoding("GB2312");導(dǎo)出的文件將會(huì)出現(xiàn)亂碼！！！
??? Response.ContentEncoding = System.Text.Encoding.UTF7;
??? Response.ContentType = "application/ms-excel";//設(shè)置輸出文件類型為excel文件。
??? System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
??? System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
??? this.GridView1.RenderControl(oHtmlTextWriter);
??? Response.Output.Write(oStringWriter.ToString());
??? Response.Flush();
??? Response.End();
? }
? public override void VerifyRenderingInServerForm( Control control )
? { }
? protected void GridView1_RowDataBound( object sender, GridViewRowEventArgs e )
? {
??? if (e.Row.RowType == DataControlRowType.DataRow)
??? {
//在此設(shè)置身份證號標(biāo)識為文本方式導(dǎo)出，否則EXCEL會(huì)自動(dòng)做去0，科學(xué)計(jì)數(shù)法表示等
????? e.Row.Cells[1].Attributes.Add("style", "vnd.ms-excel.numberformat:@;");
??? }
? }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
? <title>將 GridView 導(dǎo)出到 Excel 文件中</title>
</head>
<body>
? <form id="form1" runat="server">
??? <asp:GridView ID="GridView1" runat="server" OnRowDataBound="GridView1_RowDataBound"
????? AutoGenerateColumns="false">
????? <Columns>
??????? <asp:BoundField HeaderText="序號" DataField="id" />
??????? <asp:BoundField HeaderText="身份證號" DataField="PkID" />
??????? <asp:BoundField HeaderText="網(wǎng)址" DataField="Title" ReadOnly="true" HtmlEncode="false" />
????? </Columns>
??? </asp:GridView>
??? <asp:Literal ID="HiddenOut" runat="server" />
??? <asp:Button ID="Button1" runat="server" Text="導(dǎo)出" OnClick="Button1_Click" />
? </form>
</body>
</html>
VB.NET 代碼
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
?"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Function CreateDataSource() As ICollection
?Dim dt As System.Data.DataTable = New System.Data.DataTable
?Dim dr As System.Data.DataRow
?dt.Columns.Add(New System.Data.DataColumn("id", GetType(Int32)))
?dt.Columns.Add(New System.Data.DataColumn("PkID", GetType(String)))
?dt.Columns.Add(New System.Data.DataColumn("Title", GetType(String)))
?Dim i As Integer = 0
?While i < 6
?? dr = dt.NewRow
?? dr(0) = i
?? dr(1) = "123456789123456789123456789"
?? dr(2) = "<a href='http://dotnet.aspx.cc/'>歡迎光臨【孟憲會(huì)之精彩世界】</a>"
?? dt.Rows.Add(dr)
?? System.Math.Min(System.Threading.Interlocked.Increment(i),i-1)
?End While
?Dim dv As System.Data.DataView = New System.Data.DataView(dt)
?Return dv
End Function
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
?If Not IsPostBack Then
?? GridView1.BorderWidth = Unit.Pixel(2)
?? GridView1.BorderColor = System.Drawing.Color.DarkOrange
?? GridView1.DataSource = CreateDataSource
?? GridView1.DataBind
?End If
End Sub
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
?Response.Clear
?Response.Buffer = True
?Response.Charset = "GB2312"
?Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls")
?Response.ContentEncoding = System.Text.Encoding.UTF7
?Response.ContentType = "application/ms-excel"
?Dim oStringWriter As System.IO.StringWriter = New System.IO.StringWriter
?Dim oHtmlTextWriter As System.Web.UI.HtmlTextWriter = New System.Web.UI.HtmlTextWriter(oStringWriter)
?Me.GridView1.RenderControl(oHtmlTextWriter)
?Response.Output.Write(oStringWriter.ToString)
?Response.Flush
?Response.End
End Sub
Public Overloads Overrides Sub VerifyRenderingInServerForm(ByVal control As Control)
End Sub
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
?If e.Row.RowType = DataControlRowType.DataRow Then
?? e.Row.Cells(1).Attributes.Add("style", "vnd.ms-excel.numberformat:@;")
?End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
? <title>將 GridView 導(dǎo)出到 Excel 文件中</title>
</head>
<body>
? <form id="form1" runat="server">
??? <asp:GridView ID="GridView1" runat="server" OnRowDataBound="GridView1_RowDataBound"
????? AutoGenerateColumns="false">
????? <Columns>
??????? <asp:BoundField HeaderText="序號" DataField="id" />
??????? <asp:BoundField HeaderText="身份證號" DataField="PkID" />
??????? <asp:BoundField HeaderText="網(wǎng)址" DataField="Title" ReadOnly="true" HtmlEncode="false" />
????? </Columns>
??? </asp:GridView>
??? <asp:Literal ID="HiddenOut" runat="server" />
??? <asp:Button ID="Button1" runat="server" Text="導(dǎo)出" OnClick="Button1_Click" />
? </form>
</body>
</html>
轉(zhuǎn)載于:https://www.cnblogs.com/carekee/articles/1803190.html
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