Call Master page method from another aspx page in web forms

Zabron Muyambo 41

Hi guys

I have an asp.net web-forms application with a Master page. I am loading a separate (not content) page using Ajax popup extender, when a button is clicked (from master page). When the popup closes, I want to call a method in the calling (popping) master page so that it refreshes some controls.

Am using C#, asp.net 4.5

Please assist.

AgaveJoe 26,136 Reputation points

2021-11-24T16:07:09.36+00:00

I'm not sure that I totally understand the design intent but an AJAX request to a web method is required to call to invoke code behind logic. It's not possible to address a web method tin a master page. You'll need to use an ASMX service or a Web Method in a content page. You might be able to take advantage of an UpdatePanel. But, I have no idea as I cannot see your code.
Zabron Muyambo 41 Reputation points

2021-11-24T17:10:48.843+00:00
Oh thank you very much. Now let me explain in some other way. I have the following:

Application called MyApp

MyApp uses a single MasterPage called MasterPageMain

Have 1 content page called ContentPage0 that I will open inside MasterPageMain

MasterPageMain had an Image link/Button control on the left "side-navigation" bar, with image called "NotUpdated.jpg"

When clicked, the button image opens a popup window (using ajax popup extender), that contains a separate page called PopupPage.aspx

On closing the popup, I need to "change" the image on the master page, to "Updated.jpg"

The method to change the image is in the MasterPageMain called "Public void ChangeImage()"

I need to call this method to change the image, once the popup closes

In the content page, I would call the methods as: (this.Master as MasterPageMain).ChangeImage();

Now I want to do the same from the page in the popup window???
AgaveJoe 26,136 Reputation points

2021-11-24T19:22:10.693+00:00

Again, it is not possible to call a method in a master page without doing a post back. A few options are write a little JavaScript code to update the DOM, take advantage of the update panel which executes the page life cycle, or do a standard post back.
Zabron Muyambo 41 Reputation points

2021-11-24T21:45:09.593+00:00

Thanks again. I am not that experienced so the JavaScript way is a no-brainer for me.

The Postback way would do. Would you mind explain how I can do that?

Accepted answer

Yijing Sun-MSFT 7,066 Reputation points

2021-11-25T04:17:33.05+00:00

Hi @Zabron Muyambo ,
As far as I think,there is impossible to call the method which in the masterpage from the other page. My idea is like this: your PopupPage is inside the modalpopup and then when you close the modalpopup,it trigger the event to change the image using javascript.
My demo is like this:

Best regards,
Yijing Sun

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Zabron Muyambo 41 Reputation points

2021-11-25T06:29:14.173+00:00

A million thanks to you Yijing Sun, this looks very close to what I am looking for. How can I write the code for the method "Button1_Click" from the following code: OR, I need to include other database logic inside method test() OR, can I run/invoke a page method from test()??

This is because: the JavaScript function Test() has other logic that must access the database to check if content was entered before it changes the image to a tick (Updated.jpg). I just tried this but it was not invoked hence did not work
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Call Master page method from another aspx page in web forms

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