Use JavaScript Function in Window Application C#

This article explains how to use a JavaScript function in a C# Windows application. I have explained the following points:

• How to use a JavaScript function in a Windows application
• How to call C# code method from JavaScript in a Windows application

I have explained these points using an example. In my example I use a WebBrowser control of a Windows application.
 
Step 1: Initially create a new Windows based project. Execute Visual Studio 2010 then go to "File" -> "New" -> "Project..." then select "Windows" -> "Windows Forms Application".

Step 2: Then drag and drop a WebBrowser control to a Windows Forms form and also drag and drop a Print Dialog Control onto the form.

Step 3: Go to "Application" => "Add New Item" => "Add HTML page" to the debug folder of the Windows based application.


 
Step 4: Write this code in HTML Page.



Step 5: Then go to the code for the Windows Forms form and add the following attribute above the class of the Windows Forms form. For this you need to add the following namespace in your code.

using System.Runtime.InteropServices;



Step 6: Then write the following code in the Constructor of this form.


 Step 7: Then write this code in the Form Load method.


 
Step 8: Then write some code in WebBrowser document completed method.

1. Initially add this code: this code contains simple html based report.
   
   
   
   
2. Then write the following code for the WebBrowser DocumentCompleted event.
   
   
   

Step 9: After writing all that code you need to write the following method. This method is called by the JavaScript function.

The Method Access Specifier should be public.


 
Step 10: Then got to the HTML page and write the following function. In this function call the C# code method using window.external.PrintReport().