<div>
<div class="content wysiwyg-content">
I have several webpages in webapplication. Page Default.aspx contains 2 frames(with identifiers &quot;frame1&quot; and &quot;frame2&quot;) with 2 other pages Menu.apsx and FormGenerator.aspx. Depending on selection option in DropDownList on Menu.aspx I want to load to &quot;frame2&quot; one of pages WebForm1.aspx or WebForm2.aspx or WebForm3.aspx. How to implement this. <br />
I attached the source code of how I tried to implement this issue(but it does not work) <a href="https://filedb.experts-exchange.com/incoming/2010/11_w46/368056/application-form-generator.zip" target="_blank" class="file-inline" title="Complete sorce code of the project (14 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>application-form-generator.zip</a>
</div>
</div>


application-form-generator.zip

I have several webpages in webapplication. Page Default.aspx contains 2 frames(with identifiers "frame1" and "frame2") with 2 other pages Menu.apsx and FormGenerator.aspx. Depending on selection option in DropDownList on Menu.aspx I want to load to "frame2" one of pages WebForm1.aspx or WebForm2.aspx or WebForm3.aspx. How to implement this. 
I attached the source code of how I tried to implement this issue(but it does not work) 

how to change contents of a frame programmatically

The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications

ASP.NET

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.