Global namespace component bind

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentCodeGenerationTestBase.cs

@@ -2743,6 +2743,36 @@ public class MyComponent<T> : ComponentBase
         CompileToAssembly(generated);
     }
 
+    [IntegrationTestFact]
+    public void BindToComponent_SpecifiesValue_WithMatchingProperties_GlobalNamespaceComponent()
+    {
+        // Arrange
+        AdditionalSyntaxTrees.Add(Parse(@"
+using System;
+using Microsoft.AspNetCore.Components;
+
+public class MyComponent : ComponentBase
+{
+    [Parameter]
+    public int Value { get; set; }
+
+    [Parameter]
+    public Action<int> ValueChanged { get; set; }
+}"));
+
+        // Act
+        var generated = CompileToCSharp(@"
+<MyComponent @bind-Value=""ParentValue"" />
+@code {
+    public int ParentValue { get; set; } = 42;
+}");
+
+        // Assert
+        AssertDocumentNodeMatchesBaseline(generated.CodeDocument);
+        AssertCSharpDocumentMatchesBaseline(generated.CodeDocument);
+        CompileToAssembly(generated);
+    }
+
     [IntegrationTestFact]
     public void BindToElement_WritesAttributes()
     {

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties_GlobalNamespaceComponent/TestComponent.codegen.cs

@@ -0,0 +1,71 @@
+// <auto-generated/>
+#pragma warning disable 1591
+namespace Test
+{
+    #line default
+    using global::System;
+    using global::System.Collections.Generic;
+    using global::System.Linq;
+    using global::System.Threading.Tasks;
+    using global::Microsoft.AspNetCore.Components;
+    #line default
+    #line hidden
+    #nullable restore
+    public partial class TestComponent : global::Microsoft.AspNetCore.Components.ComponentBase
+    #nullable disable
+    {
+        #pragma warning disable 219
+        private void __RazorDirectiveTokenHelpers__() {
+        }
+        #pragma warning restore 219
+        #pragma warning disable 0414
+        private static object __o = null;
+        #pragma warning restore 0414
+        #pragma warning disable 1998
+        protected override void BuildRenderTree(global::Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
+        {
+            __o = global::Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<global::System.Int32>(
+#nullable restore
+#line 1 "x:\dir\subdir\Test\TestComponent.cshtml"
+                          ParentValue
+
+#line default
+#line hidden
+#nullable disable
+            );
+            __o = new global::System.Action<System.Int32>(
+            __value => ParentValue = __value);
+            __builder.AddAttribute(-1, "ChildContent", (global::Microsoft.AspNetCore.Components.RenderFragment)((__builder2) => {
+            }
+            ));
+            #pragma warning disable BL0005
+            ((global::MyComponent)default).
+#nullable restore
+#line 1 "x:\dir\subdir\Test\TestComponent.cshtml"
+                   Value
+
+#line default
+#line hidden
+#nullable disable
+             = default;
+            #pragma warning restore BL0005
+#nullable restore
+#line 1 "x:\dir\subdir\Test\TestComponent.cshtml"
+__o = typeof(global::MyComponent);
+
+#line default
+#line hidden
+#nullable disable
+        }
+        #pragma warning restore 1998
+#nullable restore
+#line 2 "x:\dir\subdir\Test\TestComponent.cshtml"
+
+    public int ParentValue { get; set; } = 42;
+
+#line default
+#line hidden
+#nullable disable
+    }
+}
+#pragma warning restore 1591

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties_GlobalNamespaceComponent/TestComponent.ir.txt

@@ -0,0 +1,27 @@
+Document - 
+    NamespaceDeclaration -  - Test
+        UsingDirective - (3:1,1 [20] ) - global::System
+        UsingDirective - (26:2,1 [40] ) - global::System.Collections.Generic
+        UsingDirective - (69:3,1 [25] ) - global::System.Linq
+        UsingDirective - (97:4,1 [36] ) - global::System.Threading.Tasks
+        UsingDirective - (136:5,1 [45] ) - global::Microsoft.AspNetCore.Components
+        ClassDeclaration -  - public partial - TestComponent - global::Microsoft.AspNetCore.Components.ComponentBase - 
+            DesignTimeDirective - 
+            CSharpCode - 
+                IntermediateToken -  - CSharp - #pragma warning disable 0414
+            CSharpCode - 
+                IntermediateToken -  - CSharp - private static object __o = null;
+            CSharpCode - 
+                IntermediateToken -  - CSharp - #pragma warning restore 0414
+            MethodDeclaration -  - protected override - void - BuildRenderTree
+                Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
+                    ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - Value - AttributeStructure.DoubleQuotes
+                        CSharpExpression - 
+                            LazyIntermediateToken - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - ParentValue
+                    ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - ValueChanged - ValueChanged - AttributeStructure.DoubleQuotes
+                        CSharpExpression - 
+                            IntermediateToken -  - CSharp - __value => ParentValue = __value
+                HtmlContent - (41:0,41 [2] x:\dir\subdir\Test\TestComponent.cshtml)
+                    LazyIntermediateToken - (41:0,41 [2] x:\dir\subdir\Test\TestComponent.cshtml) - Html - \n
+            CSharpCode - (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
+                LazyIntermediateToken - (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n    public int ParentValue { get; set; } = 42;\n

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties_GlobalNamespaceComponent/TestComponent.mappings.txt

@@ -0,0 +1,19 @@
+Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
+|ParentValue|
+Generated Location: (1135:29,26 [11] )
+|ParentValue|
+
+Source Location: (19:0,19 [5] x:\dir\subdir\Test\TestComponent.cshtml)
+|Value|
+Generated Location: (1663:44,19 [5] )
+|Value|
+
+Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
+|
+    public int ParentValue { get; set; } = 42;
+|
+Generated Location: (2071:62,7 [50] )
+|
+    public int ParentValue { get; set; } = 42;
+|
+

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties_GlobalNamespaceComponent/TestComponent.codegen.cs

@@ -0,0 +1,53 @@
+// <auto-generated/>
+#pragma warning disable 1591
+namespace Test
+{
+    #line default
+    using global::System;
+    using global::System.Collections.Generic;
+    using global::System.Linq;
+    using global::System.Threading.Tasks;
+    using global::Microsoft.AspNetCore.Components;
+    #line default
+    #line hidden
+    #nullable restore
+    public partial class TestComponent : global::Microsoft.AspNetCore.Components.ComponentBase
+    #nullable disable
+    {
+        #pragma warning disable 1998
+        protected override void BuildRenderTree(global::Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
+        {
+            __builder.OpenComponent<global::MyComponent>(0);
+            __builder.AddComponentParameter(1, nameof(global::MyComponent.
+#nullable restore
+#line (1,20)-(1,25) "x:\dir\subdir\Test\TestComponent.cshtml"
+Value
+
+#line default
+#line hidden
+#nullable disable
+            ), global::Microsoft.AspNetCore.Components.CompilerServices.RuntimeHelpers.TypeCheck<global::System.Int32>(
+#nullable restore
+#line (1,27)-(1,38) "x:\dir\subdir\Test\TestComponent.cshtml"
+ParentValue
+
+#line default
+#line hidden
+#nullable disable
+            ));
+            __builder.AddComponentParameter(2, nameof(global::MyComponent.ValueChanged), (global::System.Action<System.Int32>)(__value => ParentValue = __value));
+            __builder.CloseComponent();
+        }
+        #pragma warning restore 1998
+#nullable restore
+#line (2,8)-(4,1) "x:\dir\subdir\Test\TestComponent.cshtml"
+
+    public int ParentValue { get; set; } = 42;
+
+#line default
+#line hidden
+#nullable disable
+
+    }
+}
+#pragma warning restore 1591

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties_GlobalNamespaceComponent/TestComponent.ir.txt

@@ -0,0 +1,18 @@
+Document - 
+    NamespaceDeclaration -  - Test
+        UsingDirective - (3:1,1 [22] ) - global::System
+        UsingDirective - (26:2,1 [42] ) - global::System.Collections.Generic
+        UsingDirective - (69:3,1 [27] ) - global::System.Linq
+        UsingDirective - (97:4,1 [38] ) - global::System.Threading.Tasks
+        UsingDirective - (136:5,1 [47] ) - global::Microsoft.AspNetCore.Components
+        ClassDeclaration -  - public partial - TestComponent - global::Microsoft.AspNetCore.Components.ComponentBase - 
+            MethodDeclaration -  - protected override - void - BuildRenderTree
+                Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
+                    ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - Value - AttributeStructure.DoubleQuotes
+                        CSharpExpression - 
+                            LazyIntermediateToken - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - ParentValue
+                    ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - ValueChanged - ValueChanged - AttributeStructure.DoubleQuotes
+                        CSharpExpression - 
+                            IntermediateToken -  - CSharp - __value => ParentValue = __value
+            CSharpCode - (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
+                LazyIntermediateToken - (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n    public int ParentValue { get; set; } = 42;\n

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties_GlobalNamespaceComponent/TestComponent.mappings.txt

@@ -0,0 +1,19 @@
+Source Location: (19:0,19 [5] x:\dir\subdir\Test\TestComponent.cshtml)
+|Value|
+Generated Location: (874:23,0 [5] )
+|Value|
+
+Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
+|ParentValue|
+Generated Location: (1134:31,0 [11] )
+|ParentValue|
+
+Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
+|
+    public int ParentValue { get; set; } = 42;
+|
+Generated Location: (1548:43,0 [50] )
+|
+    public int ParentValue { get; set; } = 42;
+|
+

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/CSharp/ComponentTagHelperDescriptorProvider.cs

@@ -55,14 +55,22 @@ protected override void Collect(ISymbol symbol, ICollection<TagHelperDescriptor>
                 var shortNameMatchingDescriptor = CreateShortNameMatchingDescriptor(type, properties);
                 results.Add(shortNameMatchingDescriptor);
 
-                var fullyQualifiedNameMatchingDescriptor = CreateFullyQualifiedNameMatchingDescriptor(type, properties);
-                results.Add(fullyQualifiedNameMatchingDescriptor);
+                // If the component is in the global namespace, skip adding this descriptor which will be the same as the short name one.
+                TagHelperDescriptor? fullyQualifiedNameMatchingDescriptor = null;
+                if (!type.ContainingNamespace.IsGlobalNamespace)
+                {
+                    fullyQualifiedNameMatchingDescriptor = CreateFullyQualifiedNameMatchingDescriptor(type, properties);
+                    results.Add(fullyQualifiedNameMatchingDescriptor);
+                }
 
                 foreach (var childContent in shortNameMatchingDescriptor.GetChildContentProperties())
                 {
                     // Synthesize a separate tag helper for each child content property that's declared.
                     results.Add(CreateChildContentDescriptor(shortNameMatchingDescriptor, childContent));
-                    results.Add(CreateChildContentDescriptor(fullyQualifiedNameMatchingDescriptor, childContent));
+                    if (fullyQualifiedNameMatchingDescriptor is not null)
+                    {
+                        results.Add(CreateChildContentDescriptor(fullyQualifiedNameMatchingDescriptor, childContent));
+                    }
                 }
             }
         }
@@ -111,8 +119,7 @@ private static TagHelperDescriptor CreateNameMatchingDescriptor(
 
                 metadata.Add(ComponentMetadata.Component.NameMatchKey, ComponentMetadata.Component.FullyQualifiedNameMatch);
             }
-            // If the component is in the global namespace, skip adding this rule which is the same as the fully qualified one.
-            else if (!type.ContainingNamespace.IsGlobalNamespace)
+            else
             {
                 builder.TagMatchingRule(r =>
                 {