How To Reference Web User Control
Jun 10, 2013
I have created a web user control. It contains a table that has several image buttons. I want them to behave link a tab control. Here's the souce view:
Code:
<%@ Control Language="VB" AutoEventWireup="false" CodeFile="ProcessMenuContrl.ascx.vb" Inherits="ProcessMenuContrl" %>
<table >
<tr>
<td><asp:ImageButton ID="imgCustomerInformation" runat="server" CausesValidation="false" ImageUrl="~/Images/TabButton_CustomerInformation.jpg" /></td>
[Code] ....
From another page, I have placed this user control into the main content of the form. I have registered it at the top of the page:
Code:
<%@ Register src="ProcessMenuContrl.ascx" tagname="ProcessMenuContrl" tagprefix="uc1" %>
Here's portion of the source where you can see the control is placed under the MainContent of the page. :
Code:
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" Runat="Server">
<link href="Styles/QuoteStyles.css" rel="stylesheet" type="text/css" />
<uc1:ProcessMenuContrl ID="ProcessMenuContrl1" imgOrderInformation="" runat="server" />
When the user saves information that's on a form from this same page, I want to enable one of the image buttons (imgOrderInformation).
The problem is that i don't know how to reference this image button that's on the user control.
I've been trying to use Findcontrol, but must be doing it wrong.
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Feb 17, 2011
I am trying to assign user control from another user control ..first time its binding control successfully but when we refresh the data its giving error
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My senerio below :
1 Aspx page
2. User control
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Jul 15, 2010
i am trying to enter a value into a texbox that is placed inside a user control called CollectionRequest. i have referenced this user control in my code behind and created an instance of it but i seem to get the above error when i try to enter some manual text. code as follows:
protected CollectionRequest collReq;
protected void Page_Load( object sender, EventArgs e )
{
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<%@ Reference Control="~/CollectionRequest.ascx"%>
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Feb 2, 2010
Here is the contents of my test.ascx file:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="test.ascx.cs" Inherits="UserControls_test" %>
<p id="XXX">aaa</p>
and here is the contents of my test.ascx.cs file:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class UserControls_test : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
this.XXX.InnerHtml = "BBB";
}
}
I get an error when I refer to the id, "XXX" (underlined above) in code behind which reads: 'UserControls_test' does not contain a definition for 'XXX' and no extension method 'XXX' accepting a first argument of type 'UserControls_test' could be found (are you missing a using directive or an assembly reference?)
I have tried XXX.InnerHtml and I have tried this.XXX.InnerHtml and get same problem.
How do I successfully refer to ID'ed HTML elements in code behind?
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Oct 19, 2010
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Aug 11, 2010
Usage :
[code]...
The problem is it gives me following error :
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 21: {
Line 22: base.OnInit(e);
Line 23: _ContentTemplate.InstantiateIn(BodyControlSpace);
Line 24: }
Line 25:
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Jul 7, 2010
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Feb 18, 2011
I'm attempting to create a simple menu user control just as outlined here.
The attached code results in an "Object reference not set to an instance of an object" error, but I can't figure out why.
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<head runat="server">......
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Jun 11, 2010
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Mar 10, 2011
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[Code]....
Instead of using @Register directives, I register the user controls in web.config and so far this has worked just fine.
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Feb 3, 2010
I have a custom control that is based off the gridview control located at: here The control is basically a gridview that automatically creates a column of checkboxes that can be used to "check" individual rows in the gridview. During the gridview's "CreateColumns" event, the "checkboxcolumn" is created dynamically. The checkboxcolumn also contains another checkbox in the header that is used to "select/deselect all" checkboxes in the column. Since the gridview does not automatically remember the state of the checkboxes in the checkboxcolumn on postback, I added a method to the control called "SaveCheckBoxState" which stores the indexes of the checked rows in Viewstate, and then I modified the "OnRowDataBound" event to check the Viewstate and reset the checkboxes based on the Viewstate.
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protected override void OnPreRender(EventArgs e)
{
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{
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style.CssClass,
headerCheckBoxID);
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if (cb.Checked)
{
r.BackColor = SelectedRowStyle.BackColor;
r.ForeColor = SelectedRowStyle.ForeColor;
r.Font.Bold = SelectedRowStyle.Font.Bold;
}
else
{
r.BackColor = style.BackColor;
r.ForeColor = style.ForeColor;
r.Font.Bold = style.Font.Bold;
}
}
}
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Jul 16, 2010
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have two user controls on one aspx page. UC1 has a grid which contains a link button column which user clicks. Based on the value of clicked cell, I need to show some data into UC2.How do I pass data from UC1 to UC2? How do I invoke a function of UC2 from UC1?
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Apr 16, 2010
All I would like to be able to do is include one user control within another! Is this possible? I have spent the last hour searching the internet and it seems that I can't find a single thing.
In classic ASP it would be something like:
<!--#include file="EditProject.ascx"-->
I tried this but no luck!
Parser Error Message:
There can be only one 'control' directive.
Source Error:
[Code]....
Line 1: <%@ Control Language="VB" AutoEventWireup="false" CodeFile="EditProject.ascx.vb"Line 2: Inherits="Controls_WebUserControl" %>Line 3: <form runat="server">
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Sep 2, 2010
Null Reference Exception was not handled by user Object Reference not set to instance of an object
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Oct 22, 2010
I have 2 controls within my master page that I am using. One is to display user information (which is static), and the other is to display basic data associated with that user (which is not static)
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So I have the following structure:
[code]....
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Instead of repeating that code on every page content page, can I make control 2 deal with control 1 or vice versa?
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