How to Dynamically initilatize controls of User control after postback using c#?

Question

1.50/5 (2 votes)

See more:

Hi,
I have a Aspx page and a ascx page. And in aspx page I have radTabstrip and in each RadTb I am using Ascx.
I want to dynamically load the controls of ascx page in aspx page.
It is not able to find the controls of ascx once after aspx page is done if I again try to assign value to those ascx controls in ascx.cs page.
It says for the controls like label:

"Object reference not set to an instance of an object"

ASCX code:

protected void Page_Load(object sender, EventArgs e)
    {

        if (!IsPostBack)
        {
            bindControls();

        }public void bindControls()
    {
//setting controlls values
lbl.text=some value;
    }

         
   }

ASpx Code:

HTML

protected voidGridView_RowCommand(object sender, GridViewCommandEventArgs e)
    {
//calling the ascx method
acsxpage objacsxpage=new acsxpage(); 
objacsxpage.bindControls();
}

Here it is not fininding the control lbl.

Thanks,
Please help to resolve this issue.

Posted 27-Sep-11 23:52pm

veershilpa

Updated 28-Sep-11 2:06am

v7

Add a Solution

Comments

jim lahey 28-Sep-11 6:14am

You need to show us some code if you want help with this.

veershilpa 28-Sep-11 6:30am

ASCX code:
protected void Page_Load(object sender, EventArgs e)
{

if (!IsPostBack)
{
bindControls();

}
public void bindControls()
{
//setting controlls values
lbl.text=some value;
}

}

ASpx Code:

protected voidGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
//calling the ascx method
acsxpage objacsxpage=new acsxpage();
objacsxpage.bindControls();
}

here it is not fininding the control lbl

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Arun Jacob · Answer 1 · 2011-09-28T01:57:00

Solution 2

I think you are creating new user controls instead of finding the usercontrols from RadTab or from whatever container you are using.

C#

acsxpage objacsxpage=new acsxpage();

Instead of the above code you have to access the instance which is already initialized in the aspx page.

Posted 28-Sep-11 1:57am

Arun Jacob

Updated 28-Sep-11 1:58am

v2

OriginalGriff · Answer 2 · 2011-09-28T01:18:00

Solution 1

It can't find it, because it has no direct access to it.

Think about it: if you use this control on a different ASPX page, it will not have a lbl control. What is the control supposed to do then?

Find a better solution, or pass the lbl instance through to the ASCX control method instead.

Posted 28-Sep-11 1:18am

OriginalGriff