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，它包含 IL 偏移量与编译此 IL 的源文档中对应的行号和列号之间的映射。 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。