CODEWITHSUNDEEP
asp.netwinforms
Tony_Henrich
Tony_Henrich

Reputation: 44075

MessageBox.Show() not working in ASP.NET

I am trying to display some text using MessageBox.Show as shown below in a page_load event in ASP.NET. Before anyone jumps on the case why I am using it in ASP.NET, the use is for debugging only on my own dev box for a special need. There's a reference to System.Windows.Forms in the app.

I used it a few years ago so I know WinForm's MessageBox works. I am using .NET 4.0 and VS 2010. I don't think anything related to this function has changed.

MessageBox.Show("Message", "Caption", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1, MessageBoxOptions.DefaultDesktopOnly); //used also ServiceNotification option

Any ideas why the message box doesn't display? I have only that line in the code.

ADDITION:

I am VERY AWARE of the message box thing implications. It's a temporary thing for debugging only. The line won't go into production. I have no access to javascript. Please put your thought into why it doesn't work instead of why I shouldn't be using it. I have used it before in 2.0 and it does work. I want to know if the newer .NET changed anything or I misused the option.

Direct Answer: it works in Visual Studio's web server , not in IIS.

Upvotes: 3

Views: 5391

Answers (3)

user240141
user240141

Reputation:

@Tony, if you add System.Winform.dll to your rference, then you will be able to call message box.show at you development machine. But when you deploy it to some live server it will not work. So alternatively, you need to use javascript alerts. For this you can use this 

 private void ShowMessage(string message)     
   {
      ScriptManager.RegisterClientScriptBlock(control, GetType(),"key","string.format("alert('{0}');",message),true);
   }

Upvotes: 1

Joe
Joe

Reputation: 669

Back in .Net 2.0 days, you could do this by including system.windows (I think) in your using statement.

Then, in the method, it would be system.windows.forms.Messagebox.show("foo");

I won't presume to tell you "yer doin it wrong"...

Just be aware that this will only show up on the server box, and could cause issues in a production environment.

The alert() is better, and console.log() is even better.

Upvotes: -1

Felice Pollano
Felice Pollano

Reputation: 33242

The web application is hosted in a process that does not have a desktop, so you cant see any messageboxes.

Upvotes: 5

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