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Merge pull request #9207 from dotnet/main
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78
...ets/csharp/System.Reflection.Metadata/CustomAttribute/Overview/CustomAttributeSnippets.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| using System; | ||
| using System.IO; | ||
| using System.Reflection.Metadata; | ||
| using System.Reflection.PortableExecutable; | ||
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| static class CustomAttributeSnippets | ||
| { | ||
| // <SnippetPrintAttributes> | ||
| class MyAttribute : Attribute | ||
| { | ||
| public int X { get; set; } | ||
| } | ||
|
|
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| [My(X = 1)] | ||
| class ExampleType1 { } | ||
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| [My(X = 2)] | ||
| class ExampleType2 { } | ||
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| static void PrintCustomAttributes(MetadataReader mr, TypeDefinition t) | ||
| { | ||
| // Enumerate custom attributes on the type definition | ||
| foreach (CustomAttributeHandle attrHandle in t.GetCustomAttributes()) | ||
| { | ||
| CustomAttribute attr = mr.GetCustomAttribute(attrHandle); | ||
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| // Display the attribute type full name | ||
| if (attr.Constructor.Kind == HandleKind.MethodDefinition) | ||
| { | ||
| MethodDefinition mdef = mr.GetMethodDefinition((MethodDefinitionHandle)attr.Constructor); | ||
| TypeDefinition tdef = mr.GetTypeDefinition(mdef.GetDeclaringType()); | ||
| Console.WriteLine($"Type: {mr.GetString(tdef.Namespace)}.{mr.GetString(tdef.Name)}"); | ||
| } | ||
| else if (attr.Constructor.Kind == HandleKind.MemberReference) | ||
| { | ||
| MemberReference mref = mr.GetMemberReference((MemberReferenceHandle)attr.Constructor); | ||
|
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| if (mref.Parent.Kind == HandleKind.TypeReference) | ||
| { | ||
| TypeReference tref = mr.GetTypeReference((TypeReferenceHandle)mref.Parent); | ||
| Console.WriteLine($"Type: {mr.GetString(tref.Namespace)}.{mr.GetString(tref.Name)}"); | ||
| } | ||
| else if (mref.Parent.Kind == HandleKind.TypeDefinition) | ||
| { | ||
| TypeDefinition tdef = mr.GetTypeDefinition((TypeDefinitionHandle)mref.Parent); | ||
| Console.WriteLine($"Type: {mr.GetString(tdef.Namespace)}.{mr.GetString(tdef.Name)}"); | ||
| } | ||
| } | ||
|
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| // Display the attribute value | ||
| byte[] data = mr.GetBlobBytes(attr.Value); | ||
| Console.Write("Value: "); | ||
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| for (int i = 0; i < data.Length; i++) Console.Write($"{data[i]:X2} "); | ||
|
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| Console.WriteLine(); | ||
| } | ||
| } | ||
|
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| static void PrintTypesCustomAttributes(MetadataReader mr) | ||
| { | ||
| foreach (TypeDefinitionHandle tdh in mr.TypeDefinitions) | ||
| { | ||
| TypeDefinition t = mr.GetTypeDefinition(tdh); | ||
| Console.WriteLine($"{mr.GetString(t.Namespace)}.{mr.GetString(t.Name)}"); | ||
| PrintCustomAttributes(mr, t); | ||
| } | ||
| } | ||
| // </SnippetPrintAttributes> | ||
|
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| public static void Run() | ||
| { | ||
| using var fs = new FileStream(typeof(Program).Assembly.Location, FileMode.Open, FileAccess.Read, FileShare.ReadWrite); | ||
| using var peReader = new PEReader(fs); | ||
| MetadataReader mr = peReader.GetMetadataReader(); | ||
| PrintTypesCustomAttributes(mr); | ||
| } | ||
| } |
9 changes: 9 additions & 0 deletions
9
...csharp/System.Reflection.Metadata/CustomAttribute/Overview/CustomAttributeSnippets.csproj
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net7.0</TargetFramework> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
|
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| </Project> |
9 changes: 9 additions & 0 deletions
9
snippets/csharp/System.Reflection.Metadata/CustomAttribute/Overview/Program.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| using System; | ||
|
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| class Program | ||
| { | ||
| static void Main() | ||
| { | ||
| CustomAttributeSnippets.Run(); | ||
| } | ||
| } |
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