How to find control from current page when use masterpage

Question

0.00/5 (No votes)

See more:

Hi When i am working on page without using master page.
I find control by simply

C#

this.page.findControl("txtcontrol")

but when i integrate master page and other user control to that page and try to find control with same. i am getting null..

help me on this.

one more thing when i am see this.page.conrols.count in quick view at a time of debug count always "1".
where as in previous case without masterpage count will as number of page controls.

give me any idea about this

Thanks

Posted 19-Sep-11 3:45am

AditSheth

Add a Solution

2 solutions

Solution 1

You need to search for the control within the code behind for the user control, not the master page. The master page should never need to know anything about internals of the user controls that are being shown from the master page and the user controls should know nothing of the master page other than the public placeholder names. If you need to do this, then I would suggest that the inherent design of your pages is incorrect and that the solution to your problem is a correction of this design issue as opposed to trying to do things in the wrong place.

Posted 19-Sep-11 3:53am

fjdiewornncalwe

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)

GenJerDan · Accepted Answer · 2011-09-19T04:14:00

Solution 2

You're only seeing "1" control because you're searching te Master Page, not its Content.

To find a control on a page that has a master, you have to do something more like this:

this.Master.FindControl("MainContentPlaceHolder").FindControl("MyControl")

Adjusting the IDs as necessary, of course.

Controls also have a unique ClientID that looks like this:

ctl00_MainContentPlaceHolder_MyControl

Do a View Source in your browser to see what your controls are actually being named at runtime. You could do a FindControl using that ClientID, but it's cleaner to do it the first way.

Posted 19-Sep-11 4:14am

GenJerDan

Comments

fjdiewornncalwe 19-Sep-11 10:27am

It is bad practice for a master page to "know" that much about the children in it. A properly designed UI will have the UI elements of children isolated. If a value from the "txtcontrol" in the child is required by the master page, then the user control should expose the value of txtcontrol as a property that the master page can then read. Even then, the master page should really not know anything about the child controls at all.

GenJerDan 20-Sep-11 11:23am

Isolated how? Where would you put the the controls so they aren't wrapped in the master? Don't you put them in the Content areas?

AditSheth 21-Sep-11 0:05am

Thanks Gen
this.Master.FindControl("MainContentPlaceHolder").FindControl("MyControl")
I implemented it and its really works fine
my vote 5