How to open a C# form using button in ASP?

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I created an aspx project and added an existing PURE c# project. They are in one solution now. There is a button in aspx on which the c# form will open and run when clicked. I tried many things but none worked. Im not even sure if this is possible cuz some said its a mismatch thingy but some provided codes but didnt work. I just new in here, it would ve great if someone help.

What I have tried:

This is the closest one I tried but it only opened the cs code behind and not the design itself
Process.Start("c:\\somepath\\form.cs");

I tried this but it cause error could not find namespace sumtin like that.

C#projectname.Form1 f1 = new c#projectname.Form1();
f1.Show();

Im also dne adding references

Please help

Posted 7-Oct-17 7:10am

Member 13450685

Updated 10-Oct-17 7:39am

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OriginalGriff · Answer 1 · 2017-10-07T07:38:00

Solution 1

Try:

C#

form f = new form();
f.Show();

Where form is the name of the class (and normally matches the name of the file you put it in)

Posted 7-Oct-17 7:38am

OriginalGriff

Comments

Member 13450685 7-Oct-17 21:05pm

@OrginalGriff Thanks for answering but i got two errors, "The type or namespace Form1 could not be found (are you missing a using directive or an assembly reference??

The name of the c# class is
public partial class Form1 : Form

OriginalGriff 8-Oct-17 1:45am

So look at the two files: What namespace is the code that tries to open the form in? What namespace is the form class definition in?

Richard Deeming 10-Oct-17 13:31pm

That's not going to work in an ASP.NET application! :)

Richard Deeming · Answer 2 · 2017-10-10T07:39:00

In an ASP.NET application, the C# code runs on the server. Even if you were able to start a new interactive process, or open a Windows Forms / WPF window, it would appear on the server where nobody would be able to see it.

It might appear to work when you debug your application in Visual Studio. But that's only because, in that specific instance, the server and client are the same computer. As soon as you deploy to a real server, you'll either get an exception telling you that the current process is not interactive, or your code will hang waiting for an administrator to close the thousands of hidden instances of your form.

And you can't launch your form from script running on the client either. Even if the client is running a supported operating system, and has the required version of .NET installed, websites cannot launch random programs, because that would be a security nightmare.