SequencePoint 结构

定义

public value class SequencePoint : IEquatable<System::Reflection::Metadata::SequencePoint>

public readonly struct SequencePoint : IEquatable<System.Reflection.Metadata.SequencePoint>

public struct SequencePoint : IEquatable<System.Reflection.Metadata.SequencePoint>

type SequencePoint = struct

Public Structure SequencePoint
Implements IEquatable(Of SequencePoint)

继承

Object

ValueType

SequencePoint

实现

IEquatable<SequencePoint>

示例

此示例演示如何读取元数据标记定义的方法的序列点并显示其源行映射：

public static void ReadSourceLineData(string pdbPath, int methodToken)
{
    // Determine method row number
    EntityHandle ehMethod = MetadataTokens.EntityHandle(methodToken);

    if (ehMethod.Kind != HandleKind.MethodDefinition)
    {
        Console.WriteLine($"Invalid token kind: {ehMethod.Kind}");
        return;
    }

    int rowNumber = MetadataTokens.GetRowNumber(ehMethod);

    // MethodDebugInformation table is indexed by same row numbers as MethodDefinition table
    MethodDebugInformationHandle hDebug = MetadataTokens.MethodDebugInformationHandle(rowNumber);

    // Open Portable PDB file
    using var fs = new FileStream(pdbPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
    using MetadataReaderProvider provider = MetadataReaderProvider.FromPortablePdbStream(fs);
    MetadataReader reader = provider.GetMetadataReader();

    if (rowNumber > reader.MethodDebugInformation.Count)
    {
        Console.WriteLine("Error: Method row number is out of range");
        return;
    }

    // Print source line information as console table
    MethodDebugInformation di = reader.GetMethodDebugInformation(hDebug);
    Console.WriteLine("IL offset | Start line | Start col. | End line | End col. |");

    foreach (SequencePoint sp in di.GetSequencePoints())
    {
        if (sp.IsHidden)
        {
            Console.WriteLine($"{sp.Offset.ToString().PadLeft(9)} | (hidden sequence point)");
        }
        else
        {
            Console.WriteLine("{0} |{1} |{2} |{3} |{4} |", 
                sp.Offset.ToString().PadLeft(9), 
                sp.StartLine.ToString().PadLeft(11),
                sp.StartColumn.ToString().PadLeft(11),
                sp.EndLine.ToString().PadLeft(9),
                sp.EndColumn.ToString().PadLeft(9));
        }
    }
}

注解

序列点是一种结构，其中包含 IL 偏移量与源文档中的相应行号和列号之间的映射。此 IL 是从中编译的。 序列点存储在 MethodDebugInformation 可移植 PDB 调试符号表中。 有关详细信息，请参阅 可移植 PDB v1.0：格式规范。