CodeChecksumPragma Classe

Definizione

Spazio dei nomi:

System.CodeDom

Assembly:

System.CodeDom.dll

Pacchetto:

System.CodeDom v8.0.0

Origine:

CodeChecksumPragma.cs

Rappresenta un'entità di codice pragma del checksum di un codice.

public ref class CodeChecksumPragma : System::CodeDom::CodeDirective

public class CodeChecksumPragma : System.CodeDom.CodeDirective

type CodeChecksumPragma = class
    inherit CodeDirective

Public Class CodeChecksumPragma
Inherits CodeDirective

Ereditarietà

Object

CodeObject

CodeDirective

CodeChecksumPragma

Esempio

Nell'esempio di codice seguente viene illustrato l'uso della CodeChecksumPragma classe.

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);
        }

        // This example uses the SHA1 and MD5 algorithms.
        // Due to collision problems with SHA1 and MD5, Microsoft recommends SHA256 or better.
        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);
            }
        }
    }
}

Imports System.CodeDom
Imports System.CodeDom.Compiler
Imports System.Collections
Imports System.Collections.Specialized
Imports System.IO
Imports System.Reflection
Imports System.Text.RegularExpressions
Imports System.Globalization


Class CodeDirectiveDemo

    Shared Sub Main()
        Try
            DemonstrateCodeDirectives("vb", "ChecksumPragma.vb", "ChecksumPragmaVB.exe")
        Catch e As Exception
            Console.WriteLine(("Unexpected exception:" + e.ToString()))
        End Try

    End Sub


    ' Create and compile code containing code directives.
    Shared Sub DemonstrateCodeDirectives(ByVal providerName As String, ByVal sourceFileName As String, ByVal assemblyName As String)

        Dim provider As CodeDomProvider = CodeDomProvider.CreateProvider(providerName)
        
        Console.WriteLine("Building the CodeDOM graph...")
        Dim cu As New CodeCompileUnit()
        CreateGraph(cu)

        Dim sw As New StringWriter()

        Console.WriteLine("Generating code...")
        provider.GenerateCodeFromCompileUnit(cu, sw, Nothing)
        Dim output As String = sw.ToString()
        output = Regex.Replace(output, "Runtime version:[^" + vbCr + vbLf + "]*", "Runtime version omitted for this demo")

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

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

        Dim opt As 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

        Dim results As CompilerResults

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

        OutputResults(results)
        If results.NativeCompilerReturnValue <> 0 Then
            Console.WriteLine("")
            Console.WriteLine("Compilation failed.")
        Else
            Console.WriteLine("")
            Console.WriteLine("Demo completed successfully.")
        End If
        File.Delete(sourceFileName)

    End Sub

    ' This example uses the SHA1 and MD5 algorithms.
    ' Due to collision problems with SHA1 and MD5, Microsoft recommends SHA256 or better.
    Private Shared HashMD5 As New Guid(&H406EA660, &H64CF, &H4C82, &HB6, &HF0, &H42, &HD4, &H81, &H72, &HA7, &H99)
    Private Shared HashSHA1 As New Guid(&HFF1816EC, &H65FF, &H4D10, &H87, &HF7, &H6F, &H49, &H63, &H83, &H34, &H60)

    ' Create a CodeDOM graph.
    Shared Sub CreateGraph(ByVal cu As CodeCompileUnit)  'ICodeGenerator generator, 
        cu.StartDirectives.Add(New CodeRegionDirective(CodeRegionMode.Start, "Compile Unit Region"))
        cu.EndDirectives.Add(New CodeRegionDirective(CodeRegionMode.End, String.Empty))
        Dim pragma1 As New CodeChecksumPragma()
        pragma1.FileName = "c:\temp\test\OuterLinePragma.txt"
        pragma1.ChecksumAlgorithmId = HashMD5
        pragma1.ChecksumData = New Byte() {&HAA, &HAA}
        cu.StartDirectives.Add(pragma1)
        Dim pragma2 As New CodeChecksumPragma("test.txt", HashSHA1, New Byte() {&HBB, &HBB, &HBB})
        cu.StartDirectives.Add(pragma2)

        Dim ns As 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"))
        Dim cd As 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)

        Dim method1 As New CodeMemberMethod()
        method1.Name = "Method1"
        method1.Attributes = method1.Attributes And Not MemberAttributes.AccessMask Or MemberAttributes.Public


        Dim method2 As New CodeMemberMethod()
        method2.Name = "Method2"
        method2.Attributes = method2.Attributes And Not MemberAttributes.AccessMask Or MemberAttributes.Public
        method2.Comments.Add(New CodeCommentStatement("Method2 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))

        Dim field1 As New CodeMemberField(GetType(String), "field1")
        cd.Members.Add(field1)
        field1.Comments.Add(New CodeCommentStatement("Field1 Comment"))

        Dim codeRegionDirective1 As New CodeRegionDirective(CodeRegionMode.Start, "Field Region")
        field1.StartDirectives.Add(codeRegionDirective1)
        Dim codeRegionDirective2 As New CodeRegionDirective(CodeRegionMode.End, "")
        codeRegionDirective2.RegionMode = CodeRegionMode.End
        codeRegionDirective2.RegionText = String.Empty
        field1.EndDirectives.Add(codeRegionDirective2)
        Dim snippet1 As New CodeSnippetStatement()
        snippet1.Value = "            Console.WriteLine(field1)"

        Dim regionStart As 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
        Dim constructor1 As New CodeConstructor()
        constructor1.Attributes = constructor1.Attributes And Not MemberAttributes.AccessMask _
            Or MemberAttributes.Public
        Dim codeAssignStatement1 As 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)

    End Sub

    Shared Sub OutputResults(ByVal results As CompilerResults)
        Console.WriteLine(("NativeCompilerReturnValue=" + results.NativeCompilerReturnValue.ToString()))
        Dim s As String
        For Each s In results.Output
            Console.WriteLine(s)
        Next s

    End Sub
End Class

Commenti

La CodeChecksumPragma classe eredita da e può essere contenuta CodeDirective in un CodeDirectiveCollectionoggetto . CodeChecksumPragma fornisce l'identificazione univoca dei file di origine, inclusi i file generati.

Costruttori

CodeChecksumPragma()	Inizializza una nuova istanza della classe CodeChecksumPragma.
CodeChecksumPragma(String, Guid, Byte[])	Inizializza una nuova istanza della classe CodeChecksumPragma utilizzando un nome file, un GUID che rappresenta l'algoritmo di checksum e un flusso di byte che rappresenta i dati di checksum.

Proprietà

ChecksumAlgorithmId	Ottiene o imposta un GUID che identifica l'algoritmo di checksum da utilizzare.
ChecksumData	Ottiene o imposta il valore dei dati per il calcolo del checksum.
FileName	Ottiene o imposta il percorso del file di checksum.
UserData	Ottiene i dati definibili dall'utente per l'oggetto corrente. (Ereditato da CodeObject)

Metodi

Equals(Object)	Determina se l'oggetto specificato è uguale all'oggetto corrente. (Ereditato da Object)
GetHashCode()	Funge da funzione hash predefinita. (Ereditato da Object)
GetType()	Ottiene l'oggetto Type dell'istanza corrente. (Ereditato da Object)
MemberwiseClone()	Crea una copia superficiale dell'oggetto Object corrente. (Ereditato da Object)
ToString()	Restituisce una stringa che rappresenta l'oggetto corrente. (Ereditato da Object)