urvinayan
asked on
ASP.NET Control Html Render Issue
Am getting an error as
Control 'ctl00_cph1_sa' of type 'Button' must be placed inside a form tag with runat=server.
This happens while i try to get html of a control(in fact of a div control)
The page is a content page.. and i have gone through the source html file
after i got the error..I could find only one form tag and the div is well placed
inside the form tag as well.. am wondering why am getting this..Please help
Control 'ctl00_cph1_sa' of type 'Button' must be placed inside a form tag with runat=server.
This happens while i try to get html of a control(in fact of a div control)
The page is a content page.. and i have gone through the source html file
after i got the error..I could find only one form tag and the div is well placed
inside the form tag as well.. am wondering why am getting this..Please help
Protected Sub btnHtml_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnHtml.Click
Dim s As String = GetHtmlFromControl(out)
div1.InnerHtml = s
End Sub
Private Function GetHtmlFromControl(ByVal aControl As Control) As String
Dim SB As New StringBuilder
Dim SW As New StringWriter(SB)
Dim htmlTW As New HtmlTextWriter(SW)
aControl.RenderControl(htmlTW)
Return SB.ToString()
End Function
Design page as follows
<%@ Page Language="VB" MasterPageFile="~/Users/File.master" AutoEventWireup="false"
CodeFile="FileGeneral.aspx.vb" Inherits="FileGeneral" Title="Main" %>
<asp:Content ID="Content1" ContentPlaceHolderID="CPH1" runat="Server">
<table class="wrapper" id="tblCont" style="height: 100%; width: 100%;">
<tr>
<td style="height: 100%; width: 100%; vertical-align: text-top;" id="tdMainContainer"
runat="server">
<uc3:PatFileHeader ID="PatFileHeader1" runat="server"></uc3:PatFileHeader>
<h2>
<asp:Label runat="server" ID="lblSection" Text="Defined"></asp:Label>
</h2>
<div style="background-color:Green; width:90px;height:150px" id="out" runat="server">
<asp:Button ID="sa" runat="server" Text ="sadsa" />
<asp:Label ID="asasdas" runat="server" Text ="assadsadsadsadas"></asp:Label>
</div>
Last Comment
ASKER
Ur right.. I know that .. But i ve seen posts in web
saying that the above code would give the html
representation of a control thats why I tried the
above code.. and the thing seemed worked for
my friend as well.. thats why i asked.. and for the
points i know its less.. coz am running out of money
saying that the above code would give the html
representation of a control thats why I tried the
above code.. and the thing seemed worked for
my friend as well.. thats why i asked.. and for the
points i know its less.. coz am running out of money
ok, np. I'll do some checkin' of your method and I'll get back to you.
ASKER
one more thing.. i think the guys who got this rendering html
worked, i found , using forms not inherited from masterpage
worked, i found , using forms not inherited from masterpage
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I do not object to closing this question. I am, however, interested in what solution you have found. That might be of interest to future people when they get here having similar problems.
ASKER
Hai all....
The above code would be working well if u were
using asp.net 1.1 ..But for 2.0 things are a bit
different..mY SOLUTION is as follows
}
The above overriding is needed for asp.net 2.0.. I dont know why
If anyone could explain that, then thanks in advance
Now to get things work well I have to set EnableEventvalidation="fal
Now things are done.. I had a div tag with numerous controls in it
and i successfully rendered its html.. so that i could use any pdf
tool to convert that part into pdf........
The above code would be working well if u were
using asp.net 1.1 ..But for 2.0 things are a bit
different..mY SOLUTION is as follows
public string RenderControl(Control ctrl)
{
StringBuilder sb = new StringBuilder();
StringWriter tw = new StringWriter(sb);
HtmlTextWriter hw = new HtmlTextWriter(tw);
ctrl.RenderControl(hw);
return sb.ToString();
}
public
override
void
VerifyRenderingInServerForm(Control
control)
}
The above overriding is needed for asp.net 2.0.. I dont know why
If anyone could explain that, then thanks in advance
Now to get things work well I have to set EnableEventvalidation="fal
Now things are done.. I had a div tag with numerous controls in it
and i successfully rendered its html.. so that i could use any pdf
tool to convert that part into pdf........
ASKER
Sorry.. something had happended to the override function
some formating elements came there.. So let me add it
as a snippet
some formating elements came there.. So let me add it
as a snippet
public string RenderControl(Control ctrl)
{
StringBuilder sb = new StringBuilder();
StringWriter tw = new StringWriter(sb);
HtmlTextWriter hw = new HtmlTextWriter(tw);
ctrl.RenderControl(hw);
return sb.ToString();
}
public override void VerifyRenderingInServerForm(Control control)
{
}
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If you want to display the contents of a server control on a web page, it is probably easier to do it with javascript and show it using the innerHtml property.
In the code above you seem to want to move your control onto some other place. You can do that using the Controls collection.