CompilerParameters.WarningLevel Property

Definition

Namespace:

System.CodeDom.Compiler

Assembly:

System.CodeDom.dll

Source:

CompilerParameters.cs

Gets or sets the warning level at which the compiler aborts compilation.

public:
 property int WarningLevel { int get(); void set(int value); };

public int WarningLevel { get; set; }

member this.WarningLevel : int with get, set

Public Property WarningLevel As Integer

Property Value

Int32

The warning level at which the compiler aborts compilation.

Examples

The following example illustrates using CompilerParameters to specify various compiler settings and options. This code example is part of a larger example provided for the CompilerParameters class.

static bool CompileCode( CodeDomProvider^ provider,
   String^ sourceFile,
   String^ exeFile )
{

   CompilerParameters^ cp = gcnew CompilerParameters;
   if ( !cp)  
   {
      return false;
   }

   // Generate an executable instead of 
   // a class library.
   cp->GenerateExecutable = true;
   
   // Set the assembly file name to generate.
   cp->OutputAssembly = exeFile;
   
   // Generate debug information.
   cp->IncludeDebugInformation = true;
   
   // Add an assembly reference.
   cp->ReferencedAssemblies->Add( "System.dll" );
   
   // Save the assembly as a physical file.
   cp->GenerateInMemory = false;
   
   // Set the level at which the compiler 
   // should start displaying warnings.
   cp->WarningLevel = 3;
   
   // Set whether to treat all warnings as errors.
   cp->TreatWarningsAsErrors = false;
   
   // Set compiler argument to optimize output.
   cp->CompilerOptions = "/optimize";
   
   // Set a temporary files collection.
   // The TempFileCollection stores the temporary files
   // generated during a build in the current directory,
   // and does not delete them after compilation.
   cp->TempFiles = gcnew TempFileCollection( ".",true );

   if ( provider->Supports( GeneratorSupport::EntryPointMethod ) )
   {
      // Specify the class that contains 
      // the main method of the executable.
      cp->MainClass = "Samples.Class1";
   }

   if ( Directory::Exists( "Resources" ) )
   {
      if ( provider->Supports( GeneratorSupport::Resources ) )
      {
         // Set the embedded resource file of the assembly.
         // This is useful for culture-neutral resources,
         // or default (fallback) resources.
         cp->EmbeddedResources->Add( "Resources\\Default.resources" );

         // Set the linked resource reference files of the assembly.
         // These resources are included in separate assembly files,
         // typically localized for a specific language and culture.
         cp->LinkedResources->Add( "Resources\\nb-no.resources" );
      }
   }

   // Invoke compilation.
   CompilerResults^ cr = provider->CompileAssemblyFromFile( cp, sourceFile );

   if ( cr->Errors->Count > 0 )
   {
      // Display compilation errors.
      Console::WriteLine( "Errors building {0} into {1}",
         sourceFile, cr->PathToAssembly );
      for each ( CompilerError^ ce in cr->Errors )
      {
         Console::WriteLine( "  {0}", ce->ToString() );
         Console::WriteLine();
      }
   }
   else
   {
      Console::WriteLine( "Source {0} built into {1} successfully.",
         sourceFile, cr->PathToAssembly );
   }

   // Return the results of compilation.
   if ( cr->Errors->Count > 0 )
   {
      return false;
   }
   else
   {
      return true;
   }
}

public static bool CompileCode(CodeDomProvider provider,
    String sourceFile,
    String exeFile)
{

    CompilerParameters cp = new CompilerParameters();

    // Generate an executable instead of
    // a class library.
    cp.GenerateExecutable = true;

    // Set the assembly file name to generate.
    cp.OutputAssembly = exeFile;

    // Generate debug information.
    cp.IncludeDebugInformation = true;

    // Add an assembly reference.
    cp.ReferencedAssemblies.Add( "System.dll" );

    // Save the assembly as a physical file.
    cp.GenerateInMemory = false;

    // Set the level at which the compiler
    // should start displaying warnings.
    cp.WarningLevel = 3;

    // Set whether to treat all warnings as errors.
    cp.TreatWarningsAsErrors = false;

    // Set compiler argument to optimize output.
    cp.CompilerOptions = "/optimize";

    // Set a temporary files collection.
    // The TempFileCollection stores the temporary files
    // generated during a build in the current directory,
    // and does not delete them after compilation.
    cp.TempFiles = new TempFileCollection(".", true);

    if (provider.Supports(GeneratorSupport.EntryPointMethod))
    {
        // Specify the class that contains
        // the main method of the executable.
        cp.MainClass = "Samples.Class1";
    }

    if (Directory.Exists("Resources"))
    {
        if (provider.Supports(GeneratorSupport.Resources))
        {
            // Set the embedded resource file of the assembly.
            // This is useful for culture-neutral resources,
            // or default (fallback) resources.
            cp.EmbeddedResources.Add("Resources\\Default.resources");

            // Set the linked resource reference files of the assembly.
            // These resources are included in separate assembly files,
            // typically localized for a specific language and culture.
            cp.LinkedResources.Add("Resources\\nb-no.resources");
        }
    }

    // Invoke compilation.
    CompilerResults cr = provider.CompileAssemblyFromFile(cp, sourceFile);

    if(cr.Errors.Count > 0)
    {
        // Display compilation errors.
        Console.WriteLine("Errors building {0} into {1}",
            sourceFile, cr.PathToAssembly);
        foreach(CompilerError ce in cr.Errors)
        {
            Console.WriteLine("  {0}", ce.ToString());
            Console.WriteLine();
        }
    }
    else
    {
        Console.WriteLine("Source {0} built into {1} successfully.",
            sourceFile, cr.PathToAssembly);
        Console.WriteLine("{0} temporary files created during the compilation.",
            cp.TempFiles.Count.ToString());
    }

    // Return the results of compilation.
    if (cr.Errors.Count > 0)
    {
        return false;
    }
    else
    {
        return true;
    }
}

Public Shared Function CompileCode(ByVal provider As CodeDomProvider, _
ByVal sourceFile As String, ByVal exeFile As String) As Boolean

    Dim cp As New CompilerParameters()

    ' Generate an executable instead of 
    ' a class library.
    cp.GenerateExecutable = True

    ' Set the assembly file name to generate.
    cp.OutputAssembly = exeFile

    ' Generate debug information.
    cp.IncludeDebugInformation = True

    ' Add an assembly reference.
    cp.ReferencedAssemblies.Add("System.dll")

    ' Save the assembly as a physical file.
    cp.GenerateInMemory = False

    ' Set the level at which the compiler 
    ' should start displaying warnings.
    cp.WarningLevel = 3

    ' Set whether to treat all warnings as errors.
    cp.TreatWarningsAsErrors = False

    ' Set compiler argument to optimize output.
    cp.CompilerOptions = "/optimize"

    ' Set a temporary files collection.
    ' The TempFileCollection stores the temporary files
    ' generated during a build in the current directory,
    ' and does not delete them after compilation.
    cp.TempFiles = New TempFileCollection(".", True)

    If provider.Supports(GeneratorSupport.EntryPointMethod) Then
        ' Specify the class that contains
        ' the main method of the executable.
        cp.MainClass = "Samples.Class1"
    End If


    If Directory.Exists("Resources") Then
        If provider.Supports(GeneratorSupport.Resources) Then
            ' Set the embedded resource file of the assembly.
            ' This is useful for culture-neutral resources,
            ' or default (fallback) resources.
            cp.EmbeddedResources.Add("Resources\Default.resources")

            ' Set the linked resource reference files of the assembly.
            ' These resources are included in separate assembly files,
            ' typically localized for a specific language and culture.
            cp.LinkedResources.Add("Resources\nb-no.resources")
        End If
    End If

    ' Invoke compilation.
    Dim cr As CompilerResults = _
        provider.CompileAssemblyFromFile(cp, sourceFile)

    If cr.Errors.Count > 0 Then
        ' Display compilation errors.
        Console.WriteLine("Errors building {0} into {1}", _
            sourceFile, cr.PathToAssembly)
        Dim ce As CompilerError
        For Each ce In cr.Errors
            Console.WriteLine("  {0}", ce.ToString())
            Console.WriteLine()
        Next ce
    Else
        Console.WriteLine("Source {0} built into {1} successfully.", _
            sourceFile, cr.PathToAssembly)
        Console.WriteLine("{0} temporary files created during the compilation.", _
                cp.TempFiles.Count.ToString())
    End If

    ' Return the results of compilation.
    If cr.Errors.Count > 0 Then
        Return False
    Else
        Return True
    End If
End Function 'CompileCode