How to render a page’s HTML?
I’ve been trying to get the Html of a gridview and in the process I found the way to get the Html of an aspx page @ Microsoft .NET Framework Group at Google. I’ve tested the code and now I’m trying to modify it to get the HTML of a gridview. Wish me luck!
<%@ Page Language=”VB” %>
<script runat=”server”>
Protected Overrides Sub Render(ByVal writer As
System.Web.UI.HtmlTextWriter)
Const OUTPUT_FILENAME As String = “renderedpage.html”
Dim renderedOutput As StringBuilder = Nothing
Dim strWriter As IO.StringWriter = Nothing
Dim tWriter As HtmlTextWriter = Nothing
Dim outputStream As IO.FileStream = Nothing
Dim sWriter As IO.StreamWriter = Nothing
Dim filename As String
Dim nextPage As String
Try
‘create a HtmlTextWriter to use for rendering the page
renderedOutput = New StringBuilder
strWriter = New IO.StringWriter(renderedOutput)
tWriter = New HtmlTextWriter(strWriter)
MyBase.Render(tWriter)
’save the rendered output to a file
filename = Server.MapPath(“.”) & “\” & OUTPUT_FILENAME
outputStream = New IO.FileStream(filename, _
IO.FileMode.Create)
sWriter = New IO.StreamWriter(outputStream)
sWriter.Write(renderedOutput.ToString())
sWriter.Flush()
‘ redirect to another page
‘ NOTE: Continuing with the display of this page will result in the
‘ page being rendered a second time which will cause an exception
‘ to be thrown
nextPage = “DisplayMessage.aspx?” & _
”PageHeader=Information” & “&” & _
”Message1=HTML Output Saved To ” & OUTPUT_FILENAME
’Response.Redirect(nextPage)
‘Response.Write(renderedOutput.ToString())
writer.Write(renderedOutput.ToString())
Finally
‘clean up
If (Not IsNothing(outputStream)) Then
outputStream.Close()
End If
If (Not IsNothing(tWriter)) Then
tWriter.Close()
End If
If (Not IsNothing(strWriter)) Then
strWriter.Close()
End If
End Try
End Sub
</script>
<html xmlns=”http://www.w3.org/1999/xhtml” >
<head id=”Head1″ runat=”server”>
<title>Capture Page</title>
</head>
<body>
<form id=”form1″ runat=”server”>
<div>
<asp:dropdownlist id=”DropDownList1″ runat=”server”>
<asp:listitem>red</asp:listitem>
<asp:listitem>blue</asp:listitem>
<asp:listitem>green</asp:listitem>
</asp:dropdownlist></div>
</form>
</body>
</html>
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C# Lovers! dont be disapointed, here’s the code in C# too:-
protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
const string OUTPUT_FILENAME = “renderedpage.html”;
StringBuilder renderedOutput = null;
IO.StringWriter strWriter = null;
HtmlTextWriter tWriter = null;
IO.FileStream outputStream = null;
IO.StreamWriter sWriter = null;
string filename;
string nextPage;
try {
//create a HtmlTextWriter to use for rendering the page
renderedOutput = new StringBuilder();
strWriter = new IO.StringWriter(renderedOutput);
tWriter = new HtmlTextWriter(strWriter);
base.Render(tWriter);
//save the rendered output to a file
filename = Server.MapPath(“.”) + “\\” + OUTPUT_FILENAME;
outputStream = new IO.FileStream(filename, IO.FileMode.Create);
sWriter = new IO.StreamWriter(outputStream);
sWriter.Write(renderedOutput.ToString());
sWriter.Flush();
// redirect to another page
// NOTE: Continuing with the display of this page will result in the
// page being rendered a second time which will cause an Exception
// to be thrown
nextPage = “DisplayMessage.aspx?” + “PageHeader=Information” + “&” + “Message1=HTML Output Saved To ” + OUTPUT_FILENAME;
//Response.Redirect(nextPage)
//Response.Write(renderedOutput.ToString())
writer.Write(renderedOutput.ToString());
}
finally {
//clean up
if (((outputStream != null))) {
outputStream.Close();
}
if (((tWriter != null))) {
tWriter.Close();
}
if (((strWriter != null))) {
strWriter.Close();
}
}
}
you can easily get the HTML code of a gridview by calling it’s RenderControl method!
well, actually I tried it this way but it wasn’t working, but I succeeded in doing it another way by getting the html of the whole page with just the gridview and some other labels etc and succeeded. I redirected the control to that page by using Server.Transfer() , so that the user doesnt notice the change in URL and at the end of its page_load I redirected it again to another page (after sending the email) to the page after that… Moral of the story: All is well that ends well.
Thanks for the comment, I appreciate this