When we create link button Dynamically and add into placeholder ther error occur null reference exception was unhandled by user code please help me to solve this problem.

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When we create link button Dynamically and add into placeholder ther error occur null reference exception was unhandled by user code please help me to solve this problem.

<linkbutton lbl="new" mode="hold"> lbl.Text = _NoticeBoardMaster[i].NOTICEHEADLINE + "<br
string NoticeId = _NoticeBoardMaster[i].NOTICEID.ToString();
lbl.ID = NoticeId;
lbl.ForeColor = System.Drawing.Color.SlateBlue;
lbl.Click += new System.EventHandler(lbl_Click);
PlaceHolder2.Controls.Add(lbl);

Posted 30-Jun-11 22:18pm

Anuj Agnihotri

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Christian Graus · Answer 1 · 2011-06-30T22:21:00

Please edit your posts, don't create new ones. Now I have to delete the old one.

Anything you create dynamically needs to be created before page load, if it's to have view state, and needs to be created on each postback, or it will be gone. Did you create it in the same postback that you ran this code ? What is <linkbutton lbl="new" mode="hold" /> ? It's not part of your code, nor anything useful if it's in an aspx.

This tells us you tried to access something. It doesn't tell us why you expect it to exist, where you called it, etc.

Pete O'Hanlon · Answer 2 · 2011-06-30T23:02:00

Solution 2

I'm going to guess that the problem lies in this line:

C#

_NoticeBoardMaster[i]

I suspect that whatever value of i you are using there, that there is no instance in _NoticeBoardMaster at that point. Put a breakpoint there and verify the value of this variable.

Posted 30-Jun-11 23:02pm

Pete O'Hanlon