在ASP.NET 2.0中直接得到本页面生成的HTML代码 -优快云博客

本文介绍如何在ASP.NET 2.0中获取页面生成的HTML代码，并将其保存为静态文件。通过覆写Render方法，利用StringWriter和HtmlTextWriter实现整个页面内容的捕获。

在ASP.NET 2.0中，有时候需要对ASP.NET生成的HTML代码进行处理，或者是保存成静态文件。ASP.NET 提供了直接将请求保存成文件的方法：HttpRequest.SaveAs方法。下面这个方法就是在ASP.NET 2.0中得到ASP.NET生成的HTML代码，同时，生成一个静态文件的方法。

<% @ Page Language = " C# " AutoEventWireup = " true " %> <! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > < script runat ="server" > // 计算数据，完全可以从数据看取得 ICollection CreateDataSource( ) { System.Data.DataTable dt = new System.Data.DataTable(); System.Data.DataRow dr; dt.Columns.Add( new System.Data.DataColumn( " 学生班级 " , typeof (System.String))); dt.Columns.Add( new System.Data.DataColumn( " 学生姓名 " , typeof (System.String))); dt.Columns.Add( new System.Data.DataColumn( " 语文 " , typeof (System.Decimal))); dt.Columns.Add( new System.Data.DataColumn( " 数学 " , typeof (System.Decimal))); dt.Columns.Add( new System.Data.DataColumn( " 英语 " , typeof (System.Decimal))); dt.Columns.Add( new System.Data.DataColumn( " 计算机 " , typeof (System.Decimal))); for ( int i = 0 ; i < 50 ; i ++ ) { System.Random rd = new System.Random(Environment.TickCount * i); ; dr = dt.NewRow(); dr[ 0 ] = " 班级 " + i.ToString(); dr[ 1 ] = " 【孟子E章】 " + i.ToString(); dr[ 2 ] = System.Math.Round(rd.NextDouble() * 100 , 2 ); dr[ 3 ] = System.Math.Round(rd.NextDouble() * 100 , 2 ); dr[ 4 ] = System.Math.Round(rd.NextDouble() * 100 , 2 ); dr[ 5 ] = System.Math.Round(rd.NextDouble() * 100 , 2 ); 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.DataSource = CreateDataSource(); GridView1.DataBind(); } } protected override void Render( HtmlTextWriter writer ) { System.IO.StringWriter html = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter tw = new System.Web.UI.HtmlTextWriter(html); base.Render(tw); System.IO.StreamWriter sw; sw = new System.IO.StreamWriter(Server.MapPath( " a.htm " ), false , System.Text.Encoding.Default); sw.Write(html.ToString()); sw.Close(); tw.Close(); Response.Write(html.ToString()); } </ script > < html xmlns ="http://www.w3.org/1999/xhtml" > < head > < title > 得到ASP.NET生成的HTML </ title > </ head > < body > < form id ="Form1" runat ="server" > < asp:GridView ID ="GridView1" runat ="server" Font-Size ="12px" BackColor ="#FFFFFF" GridLines ="Both" CellPadding ="4" Width ="560" > < HeaderStyle BackColor ="#EDEDED" Height ="26px" /> </ asp:GridView > </ form > </ body > </ html >

VB.NET

<% @ 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( " 学生班级 " , GetType(System.String))) dt.Columns.Add(New System.Data.DataColumn( " 学生姓名 " , GetType(System.String))) dt.Columns.Add(New System.Data.DataColumn( " 语文 " , GetType(System.Decimal))) dt.Columns.Add(New System.Data.DataColumn( " 数学 " , GetType(System.Decimal))) dt.Columns.Add(New System.Data.DataColumn( " 英语 " , GetType(System.Decimal))) dt.Columns.Add(New System.Data.DataColumn( " 计算机 " , GetType(System.Decimal))) Dim i As Integer = 0 For i = 0 To 50 - 1 Dim rd As System.Random = New System.Random(Environment.TickCount * i) dr = dt.NewRow dr( 0 ) = " 班级 " + i.ToString dr( 1 ) = " 【孟子E章】 " + i.ToString dr( 2 ) = System.Math.Round(rd.NextDouble * 100 , 2 ) dr( 3 ) = System.Math.Round(rd.NextDouble * 100 , 2 ) dr( 4 ) = System.Math.Round(rd.NextDouble * 100 , 2 ) dr( 5 ) = System.Math.Round(rd.NextDouble * 100 , 2 ) dt.Rows.Add(dr) Next 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.DataSource = CreateDataSource() GridView1.DataBind() End If End Sub Protected Overloads Overrides Sub Render(ByVal writer As HtmlTextWriter) Dim html As System.IO.StringWriter = New System.IO.StringWriter Dim tw As System.Web.UI.HtmlTextWriter = New System.Web.UI.HtmlTextWriter(html) MyBase.Render(tw) Dim sw As System.IO.StreamWriter sw = New System.IO.StreamWriter(Server.MapPath( " a.htm " ), False, System.Text.Encoding.Default) sw.Write(html.ToString) sw.Close() tw.Close() Response.Write(html.ToString) End sub </ script > < html xmlns ="http://www.w3.org/1999/xhtml" > < head > < title > 得到ASP.NET生成的HTML </ title > </ head > < body > < form id ="Form1" runat ="server" > < asp:GridView ID ="GridView1" runat ="server" Font-Size ="12px" BackColor ="#FFFFFF" GridLines ="Both" CellPadding ="4" Width ="560" > < HeaderStyle BackColor ="#EDEDED" Height ="26px" /> </ asp:GridView > </ form > </ body > </ html