title: input box in asp.net c#
body: <p>I need to create a simple input box on my website in C#.
  It should pop up, when i call it in the code like that</p>
  
  <pre><code>String input = InputBox("Name the file"); 
  </code></pre>
  
  <p>and then I need the use string the users enters later in the code
  In a .net application, it is pretty easy to accomplish, but how can i make it work in a web application? I think it should be possible with ajax, but it seems pretty complicated for such a (seemingly) trivial thing.
  Is there any kind of library or framework, that I can use for this right away?</p>
  
  <p>thanks in advance</p>