How to add a define to an ASP.net solution?

问题

i can add a define to a WinForms project through the Project Properties:

How do i add a define to an ASP.net solution?

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Update: Here's what Visual Studio 2010 looks like when working in an ASP.net solution:

回答1:

Solution Explorer > WebApplicationProject (Name of your Web Application) > Properties > Build:

回答2:

Have you tried using the compilerOptions attribute of the compilerv element in web.config? Like so:

<system.codedom>
    <compilers>
        <compiler language="c#;cs;csharp" 
            extension=".cs" 
            warningLevel="4" 
            type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
            compilerOptions="/define:TRACE">
            <providerOption name="CompilerVersion" value="v3.5"/>
            <providerOption name="WarnAsError" value="false"/>
        </compiler>
....

Should do the trick I think...

来源：https://stackoverflow.com/questions/11397158/how-to-add-a-define-to-an-asp-net-solution