User Control Strange Problem

Raed Sawalha

I created a very simple user control which contains lable and drag the
control to page

<%@ Page language="c#" Codebehind="Validate.aspx.cs" AutoEventWireup="false"
Inherits="Learning.Validate" %>
<%@ Register TagPrefix="uc1" TagName="GroupFilesManager"
Src="GroupFilesManager.ascx" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>Validate</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5"
name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<uc1:GroupFilesManager id="oGroupFilesManager"
runat="server"></uc1:GroupFilesManager></form>
</body>
</HTML>

in cs file i define the control object as GroupFileManager oGroupFilesManager;
but when try to use a function in
oGroupFilesManager it null??? why

Nov 19 '05 #1

Subscribe Post Reply

1073

Raymond Yuen

Hi Raed Sawalha,

Try to declare it as protected member:
protected GroupFileManager oGroupFilesManager;

Raymond

"Raed Sawalha" wrote:

I created a very simple user control which contains lable and drag the
control to page

<%@ Page language="c#" Codebehind="Validate.aspx.cs" AutoEventWireup="false"
Inherits="Learning.Validate" %>
<%@ Register TagPrefix="uc1" TagName="GroupFilesManager"
Src="GroupFilesManager.ascx" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>Validate</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5"
name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<uc1:GroupFilesManager id="oGroupFilesManager"
runat="server"></uc1:GroupFilesManager></form>
</body>
</HTML>

in cs file i define the control object as GroupFileManager oGroupFilesManager;
but when try to use a function in
oGroupFilesManager it null??? why

Nov 19 '05 #2

Raed Sawalha

Great! it worked well....but what is the reason that I need to declare it as
protected?

"Raymond Yuen" wrote:

Hi Raed Sawalha,

Try to declare it as protected member:
protected GroupFileManager oGroupFilesManager;

Raymond

"Raed Sawalha" wrote:
I created a very simple user control which contains lable and drag the
control to page

<%@ Page language="c#" Codebehind="Validate.aspx.cs" AutoEventWireup="false"
Inherits="Learning.Validate" %>
<%@ Register TagPrefix="uc1" TagName="GroupFilesManager"
Src="GroupFilesManager.ascx" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>Validate</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5"
name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<uc1:GroupFilesManager id="oGroupFilesManager"
runat="server"></uc1:GroupFilesManager></form>
</body>
</HTML>

in cs file i define the control object as GroupFileManager oGroupFilesManager;
but when try to use a function in
oGroupFilesManager it null??? why

Nov 19 '05 #3

Raymond Yuen

If you declare it as "protected" member, then the ASP.NET runtime will "know"
that the control declared on your WebForm is inherited from the object
declared in its code-behind page. Otherwise, the object declared in the
code-behind will be an independent object.

Raymond

"Raed Sawalha" wrote:

Great! it worked well....but what is the reason that I need to declare it as
protected?

"Raymond Yuen" wrote:
Hi Raed Sawalha,

Try to declare it as protected member:
protected GroupFileManager oGroupFilesManager;

Raymond

"Raed Sawalha" wrote:
I created a very simple user control which contains lable and drag the
control to page

<%@ Page language="c#" Codebehind="Validate.aspx.cs" AutoEventWireup="false"
Inherits="Learning.Validate" %>
<%@ Register TagPrefix="uc1" TagName="GroupFilesManager"
Src="GroupFilesManager.ascx" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>Validate</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5"
name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<uc1:GroupFilesManager id="oGroupFilesManager"
runat="server"></uc1:GroupFilesManager></form>
</body>
</HTML>

in cs file i define the control object as GroupFileManager oGroupFilesManager;
but when try to use a function in
oGroupFilesManager it null??? why

Nov 19 '05 #4

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