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CodeChecksumPragma Class

Represents a code checksum pragma code entity.

Namespace: System.CodeDom
Assembly: System (in system.dll)

[SerializableAttribute] 
[ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)] 
[ComVisibleAttribute(true)] 
public class CodeChecksumPragma : CodeDirective
/** @attribute SerializableAttribute() */ 
/** @attribute ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) */ 
/** @attribute ComVisibleAttribute(true) */ 
public class CodeChecksumPragma extends CodeDirective
SerializableAttribute 
ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) 
ComVisibleAttribute(true) 
public class CodeChecksumPragma extends CodeDirective
Not applicable.

The CodeChecksumPragma class inherits from CodeDirective and can be contained in a CodeDirectiveCollection. CodeChecksumPragma provides the unique identification of source files, including files that have been generated.

The following code example shows the use of the CodeChecksumPragma class.

using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections;
using System.Collections.Specialized;
using System.IO;
using System.Reflection;
using System.Text.RegularExpressions;
using System.Globalization;
namespace System.CodeDom
{
    class CodeDirectiveDemo
    {
        static void Main()
        {
            try
            {
                DemonstrateCodeDirectives("cs", "ChecksumPragma.cs", "ChecksumPragmaCS.exe");
            }
            catch (Exception e)
            {
                Console.WriteLine("Unexpected Exception:" + e.ToString());
            }
        }

        // Create and compile code containing code directives.
        static void DemonstrateCodeDirectives(string providerName, string sourceFileName, string assemblyName)
        {

            CodeDomProvider provider = CodeDomProvider.CreateProvider(providerName);

            Console.WriteLine("Building the CodeDOM graph...");

            CodeCompileUnit cu = new CodeCompileUnit();

            CreateGraph(cu);

            StringWriter sw = new StringWriter();

            Console.WriteLine("Generating code...");
            provider.GenerateCodeFromCompileUnit(cu, sw, null);

            string output = sw.ToString();
            output = Regex.Replace(output, "Runtime Version:[^\r\n]*",
                "Runtime Version omitted for demo");

            Console.WriteLine("Dumping source code...");
            Console.WriteLine(output);

            Console.WriteLine("Writing source code to file...");
            Stream s = File.Open(sourceFileName, FileMode.Create);
            StreamWriter t = new StreamWriter(s);
            t.Write(output);
            t.Close();
            s.Close();

            CompilerParameters opt = new CompilerParameters(new string[]{
                                      "System.dll", 
                                      "System.Xml.dll",
                                      "System.Windows.Forms.dll",
                                      "System.Data.dll",
                                      "System.Drawing.dll"});
            opt.GenerateExecutable = false;
            opt.TreatWarningsAsErrors = true;
            opt.IncludeDebugInformation = true;
            opt.GenerateInMemory = true;

            CompilerResults results;

            Console.WriteLine("Compiling with " + providerName);
            results = provider.CompileAssemblyFromFile(opt, sourceFileName);

            OutputResults(results);
            if (results.NativeCompilerReturnValue != 0)
            {
                Console.WriteLine("");
                Console.WriteLine("Compilation failed.");
            }
            else
            {
                Console.WriteLine("");
                Console.WriteLine("Demo complete.");
            }
            File.Delete(sourceFileName);
        }

        private static Guid HashMD5 = new Guid(0x406ea660, 0x64cf, 0x4c82, 0xb6, 0xf0, 0x42, 0xd4, 0x81, 0x72, 0xa7, 0x99);
        private static Guid HashSHA1 = new Guid(0xff1816ec, 0xaa5e, 0x4d10, 0x87, 0xf7, 0x6f, 0x49, 0x63, 0x83, 0x34, 0x60);

        // Create a CodeDOM graph.
        static void CreateGraph( CodeCompileUnit cu)
        {
            cu.StartDirectives.Add(new CodeRegionDirective(CodeRegionMode.Start,
                "Compile Unit Region"));
            cu.EndDirectives.Add(new CodeRegionDirective(CodeRegionMode.End,
                string.Empty));
            CodeChecksumPragma pragma1 = new CodeChecksumPragma();
            pragma1.FileName = "c:\\temp\\test\\OuterLinePragma.txt";
            pragma1.ChecksumAlgorithmId = HashMD5;
            pragma1.ChecksumData = new byte[] { 0xAA, 0xAA };
            cu.StartDirectives.Add(pragma1);
            CodeChecksumPragma pragma2 = new CodeChecksumPragma("test.txt", HashSHA1, new byte[] { 0xBB, 0xBB, 0xBB });
            cu.StartDirectives.Add(pragma2);

            CodeNamespace ns = new CodeNamespace("Namespace1");
            ns.Imports.Add(new CodeNamespaceImport("System"));
            ns.Imports.Add(new CodeNamespaceImport("System.IO"));
            cu.Namespaces.Add(ns);
            ns.Comments.Add(new CodeCommentStatement("Namespace Comment"));
            CodeTypeDeclaration cd = new CodeTypeDeclaration("Class1");
            ns.Types.Add(cd);

            cd.Comments.Add(new CodeCommentStatement("Outer Type Comment"));
            cd.LinePragma = new CodeLinePragma("c:\\temp\\test\\OuterLinePragma.txt", 300);

            CodeMemberMethod method1 = new CodeMemberMethod();
            method1.Name = "Method1";
            method1.Attributes = (method1.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;


            CodeMemberMethod method2 = new CodeMemberMethod();
            method2.Name = "Method2";
            method2.Attributes = (method2.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;
            method2.Comments.Add(new CodeCommentStatement("Method 2 Comment"));

            cd.Members.Add(method1);
            cd.Members.Add(method2);

            cd.StartDirectives.Add(new CodeRegionDirective(CodeRegionMode.Start,
                "Outer Type Region"));

            cd.EndDirectives.Add(new CodeRegionDirective(CodeRegionMode.End,
                string.Empty));

            CodeMemberField field1 = new CodeMemberField(typeof(String), "field1");
            cd.Members.Add(field1);
            field1.Comments.Add(new CodeCommentStatement("Field 1 Comment"));

            CodeRegionDirective codeRegionDirective1 = new CodeRegionDirective(CodeRegionMode.Start,
                "Field Region");
            field1.StartDirectives.Add(codeRegionDirective1);
            CodeRegionDirective codeRegionDirective2 = new CodeRegionDirective(CodeRegionMode.End,
                "");
            codeRegionDirective2.RegionMode = CodeRegionMode.End;
            codeRegionDirective2.RegionText = string.Empty;
            field1.EndDirectives.Add(codeRegionDirective2);

            CodeSnippetStatement snippet1 = new CodeSnippetStatement();
            snippet1.Value = "            Console.WriteLine(field1);";

            CodeRegionDirective regionStart = new CodeRegionDirective(CodeRegionMode.End, "");
            regionStart.RegionText = "Snippet Region";
            regionStart.RegionMode = CodeRegionMode.Start;
            snippet1.StartDirectives.Add(regionStart);
            snippet1.EndDirectives.Add(new CodeRegionDirective(CodeRegionMode.End, string.Empty));

            // CodeStatement example
            CodeConstructor constructor1 = new CodeConstructor();
            constructor1.Attributes = (constructor1.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;
            CodeStatement codeAssignStatement1 = new CodeAssignStatement(
                                        new CodeFieldReferenceExpression(
                                            new CodeThisReferenceExpression(),
                                            "field1"),
                                        new CodePrimitiveExpression("value1"));
            codeAssignStatement1.StartDirectives.Add(new CodeRegionDirective(CodeRegionMode.Start, "Statements Region"));
            cd.Members.Add(constructor1);
            codeAssignStatement1.EndDirectives.Add(new CodeRegionDirective(CodeRegionMode.End, string.Empty));
            method2.Statements.Add(codeAssignStatement1);
            method2.Statements.Add(snippet1);

        }

        static void OutputResults(CompilerResults results)
        {
            Console.WriteLine("NativeCompilerReturnValue=" +
                results.NativeCompilerReturnValue.ToString());
            foreach (string s in results.Output)
            {
                Console.WriteLine(s);
            }
        }

    }
}

System.Object
   System.CodeDom.CodeObject
     System.CodeDom.CodeDirective
      System.CodeDom.CodeChecksumPragma
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0
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