Cannot use Page.FindControl in button event handler?

[wll6568]

I have the control id name in string, and try to find it in the event handler:

1 protected void btnGo_OnClick(object sender, EventArgs e)
2 {
3 ((TextBox)Page.FindControl("txb" + strColumn)).Text
4 }

but that throws an object reference not set to an instance of an object. It seems as if the control cannot be found?

[serkan sendur]

where do you define "strColumn"?

[achristov]

Often controls are buried into deeper level of control hierarchy. Obviously the control you were trying to find is not in the next level. Add trace="true" in your Page directive attributes and try to locate the control. Also, it is often decorated with some additional symbols, especially if it is repeatedly created by, say, a data control. Try to add a TextBox in a Repeater and watch the control list...

[greeny_1984]

hi,

there are few flaws in u r code.did u declare strcolumn

protected void btnGo_OnClick(object sender, EventArgs e)
2 {
3 ((TextBox)Page.FindControl("txb" + strColumn)).Text [B];[/B]
4 }