ASP.NET: Passing data from content page to master page

Question

I have a label named headerLabel in my master page, and I'd like to set its text to the title from the content page. How do I do this?

you can use [this question](http://stackoverflow.com/questions/1092784/how-to-control-elements-on-a-asp-net-master-page-from-child-page) — Amir, Jan 16 '14 at 11:20

score 5 · Accepted Answer · answered Jan 16 '14 at 11:18

5

On your master page create a public property - something along the lines of:

public string LabelValue
{
  get{ return this.headerLabel.Text;}
  set{ this.headerLabel.Text = value;}
}

Then, on your child page you can do this:

((MyMasterPage)this.Master).LabelValue = "SomeValue";

answered Jan 16 '14 at 11:18

Liath

2

You have to provide a public property `headerlabel` which returns this label. Then this approach is better than the [`FindControl` approach](http://stackoverflow.com/a/21160299/284240). Otherwise you cannot access it directly since controls are `protected` by default. – Tim Schmelter Jan 16 '14 at 11:19
Nice suggestion - I've updated, I always prefer to access properties - I like the idea of having a public property on the master page rather than the public label. – Liath Jan 16 '14 at 11:22
How do I go about adding a public property? My project says the 'MasterPage' does not contain a definition for 'LabelValue' – Phil Jan 16 '14 at 11:31
@PhilipLoffler add the first code segment to your master page – Liath Jan 16 '14 at 11:33
I have done this but I'm still getting the same issue – Phil Jan 16 '14 at 11:45
@PhilipLoffler where have you added it? In the code behind of the master page class? – Liath Jan 16 '14 at 11:47
I put it in there and in a script in MasterPage.Master – Phil Jan 16 '14 at 11:50
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/45370/discussion-between-liath-and-philip-loffler) – Liath Jan 16 '14 at 11:51

Sain Pradeep · Answer 2 · 2014-01-16T11:41:00.247

2

You need to find control by it's id on the content page then set text property of label like this

(Label)MasterPage.FindControl("headerLabel").Text="Your Title";

it better to check null before assigning the text property like this

 Label mylbl= (Label) MasterPage.FindControl("headerLabel");
    if(mylbl!= null)
    {
        mylbl.Text = "Your Title";
    }

edited Jan 16 '14 at 11:41

answered Jan 16 '14 at 11:18

Sain Pradeep

Hard coding control names as strings is BAD! – Amir Jan 16 '14 at 11:28
@Amir I agree to a point but you have to assume some things are set otherwise you could never redirect or write javascript! – Liath Jan 16 '14 at 11:34
1

Follow this article. It described all of the way of sending data to master page like itle, Meta Tags, and Other HTML Headers in the master page. https://learn.microsoft.com/en-us/aspnet/web-forms/overview/older-versions-getting-started/master-pages/specifying-the-title-meta-tags-and-other-html-headers-in-the-master-page-cs – Kabir Hossain Sep 13 '17 at 05:49

2 Answers2