value of Master page label not getting updated form content page

Question

I have a content page I am updating the value of asp:Label of Master page from content page . value do get updated but the updated value is not visible. I tried two method using

1). defining a property (on master page) to set and get label value. e.g.

public string setErrorMsg
{        
    get { return lbl1.Text; }
    set { lbl1.Text = value; }
}

2) by finding control (label of master page) from content page and setting its text. e.g.

 Label lblMasterError = this.Page.Master.FindControl("lbl1") as Label;
 lblMasterError.Text="text is updated form content page";

both are updating value if I see it in debug mode but updated label value is not visible on content page.What might be the possible reasons for this behavior?

Singh

Which event is this code in? It's possible you're setting it after it has been rendered. – Shandy

I am updating master page label value on button click event in content page. – Singh

Answer 1

I don't know why is not finding your label but I've had the same to happen before. this is what works for me:

In the master page cs:

public void SetErrorMsg(string ErrorMsg)
{
    this.lbl1.Text = ErrorMsg;
}

From aspx page code behind (replace myMasterPage name w/ yours):

 ((myMasterPage)Master).SetErrorMsg("Some error text");

Bidarka

I solved the issues myself after a lot of search. The issue was I am updating master page label through content page having updated panel in it. There are two solution to this issue. 1)give a partial post back using trigger of updated panel on some event. or (2)If you does not want the page postback placed the master page label in a update panel and use find control property for update panel and call the built in update function of update panel UpdatePanel up_pnl= UpdatePanel)Master.FindControl("UpdatePanel1"); then call after updating the label text up_pnl.update(). – Singh

Hello Muhammad Current I face same issue. Where you find update panel. Is you call this code in master page or content page. Please put your code here. – Nephritic