Server-side code working with JavaScript using ASP.NET

Question

I am trying to get a server side code working with JavaScript. What am I doing wrong?

function openUp(name)
{
    document.getElementById(name).style.display =  <%if (Request.ServerVariables["HTTP_USER_AGENT"].Contains("FireFox"))Then %>
        response.write('table-row'); <%else%> response.write('block');
}

For starters, you're trying to build JavaScript dynamically, which is almost always a bad idea. Use classes and [data-*] attributes to pass data to the client side, and keep your scripts in external .js files. — zzzzBov
– zzzzBov, Commented Sep 26, 2012 at 14:05

Peter Mortensen · Accepted Answer · 2012-11-20 15:27:12Z

2

Your Response.Write statement (which is not properly cased) should be inside the <% %> tags. You also seem to have an odd mixture of C# and VB.NET in your code. Which of the following are you using?

C#

document.getElementById(name).style.display =  
    <% if (Request.ServerVariables["HTTP_USER_AGENT"].Contains("FireFox"))
           Response.Write("'table-row'");
       else
           Response.Write("'block'"); %>; // Semi-colon outside of %> is for JavaScript

VB.NET

document.getElementById(name).style.display =  
    <% If (Request.ServerVariables("HTTP_USER_AGENT").Contains("FireFox")) Then
           Response.Write("'table-row'") 
       Else
           Response.Write("'block'")
       End If %>; // Semi-colon outside of %> is for JavaScript

edited Nov 20, 2012 at 15:27

Peter Mortensen

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answered Sep 26, 2012 at 14:09

Joel Etherton

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Comments

Tim B James · Accepted Answer · 2012-09-26 14:10:13Z

0

To answer your question, you can update your code to;

C#

document.getElementById(name).style.display = '<%Response.Write((Request.ServerVariables["HTTP_USER_AGENT"].Contains("FireFox") ? "table-row": "block")); %>';

VB

document.getElementById(name).style.display = '<%Response.Write(IIF(Request.ServerVariables["HTTP_USER_AGENT"].Contains("FireFox"), "table-row", "block")) %>';

answered Sep 26, 2012 at 14:10

Tim B James

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