如何调试服务器端JScript代码

Question

I need to maintain a classic ASP project which requires debugging server-side JScript code. For example, consider an A.aspx file with the following code:

<% @Page Language="JScript" aspcompat="true" %>
<%
var a = 1;
var b = a + a;
...// Other statements here
Response.Write(b);
%>

In Visual Studio, I cannot put any breakpoint on any server-side jscript lines or blocks, eg put a breakpoint on line var b = a + a;

However, it's okay for client-side javascript code debugging. It becomes a big pain for me to debug code like this.

I want to know how to debug server-side jscript code or if any tools support such features?

Thanks.

Answer 1

I saw this online but I haven't tried before.

So far I try to debug in writing it on the scree by

<%@ LANGUAGE="JavaScript" %>
<%
var blnTrace;
var strTrace = Application("g_Trace");
if (strTrace && strTrace.toUpperCase() == "TRUE")
    blnTrace = true;
else
    blnTrace = false;

var a = 1;
var b = a + a;
...// Other statements here

if (blnTrace)
{
    Response.Write(b);
}

...// Other statements here

%>

So that I can turn on/off the debug message.

Answer 2

I ran into this same issue recently while working on an old website.

You can cause the application to break by calling Debugger.Break .

Press F5 to debug the website, when the application hits that line of code it will behave the same as if there is a breakpoint there.

Make sure to remove this before you move to a production enviroment or set Debug="false"

<% @Page Language="JScript" aspcompat="true" %>
<%
var a = 1;
System.Diagnostics.Debugger.Break();
var b = a + a;
...// Other statements here
Response.Write(b);
%>