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For components, allow attribute values to be arbitrary objects

This commit is contained in:
Steve Sanderson 2018-01-26 09:54:35 -08:00
parent 1b4fa4781a
commit 3940ca8b60
3 changed files with 26 additions and 6 deletions
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16
src/Microsoft.AspNetCore.Blazor/RenderTree/RenderTreeBuilder.cs
View File

@ -102,8 +102,20 @@ namespace Microsoft.AspNetCore.Blazor.RenderTree
/// <param name="value">The value of the attribute.</param> /// <param name="value">The value of the attribute.</param>
public void AddAttribute(int sequence, string name, object value) public void AddAttribute(int sequence, string name, object value)
{ {
AssertCanAddAttribute(); if (_lastNonAttributeNodeType == RenderTreeNodeType.Element)
Append(RenderTreeNode.Attribute(sequence, name, value.ToString())); {
// Element attribute values can only be strings or UIEventHandler
Append(RenderTreeNode.Attribute(sequence, name, value.ToString()));
}
else if (_lastNonAttributeNodeType == RenderTreeNodeType.Component)
{
Append(RenderTreeNode.Attribute(sequence, name, value));
}
else
{
// This is going to throw. Calling it just to get a consistent exception message.
AssertCanAddAttribute();
}
} }
/// <summary> /// <summary>

8
src/Microsoft.AspNetCore.Blazor/RenderTree/RenderTreeNode.cs
View File

@ -106,6 +106,14 @@ namespace Microsoft.AspNetCore.Blazor.RenderTree
AttributeValue = value AttributeValue = value
}; };
internal static RenderTreeNode Attribute(int sequence, string name, object value) => new RenderTreeNode
{
Sequence = sequence,
NodeType = RenderTreeNodeType.Attribute,
AttributeName = name,
AttributeValue = value
};
internal static RenderTreeNode ChildComponent<T>(int sequence) where T: IComponent => new RenderTreeNode internal static RenderTreeNode ChildComponent<T>(int sequence) where T: IComponent => new RenderTreeNode
{ {
Sequence = sequence, Sequence = sequence,

8
test/Microsoft.AspNetCore.Blazor.Test/RenderTreeDiffComputerTest.cs
View File

@ -684,9 +684,9 @@ namespace Microsoft.AspNetCore.Blazor.Test
var diff = new RenderTreeDiffComputer(renderer); var diff = new RenderTreeDiffComputer(renderer);
var testObject = new object(); var testObject = new object();
newTree.OpenComponentElement<FakeComponent>(0); newTree.OpenComponentElement<FakeComponent>(0);
//newTree.AddAttribute(1, nameof(FakeComponent.IntProperty), 123); newTree.AddAttribute(1, nameof(FakeComponent.IntProperty), 123);
newTree.AddAttribute(2, nameof(FakeComponent.StringProperty), "some string"); newTree.AddAttribute(2, nameof(FakeComponent.StringProperty), "some string");
//newTree.AddAttribute(3, nameof(FakeComponent.ObjectProperty), testObject); newTree.AddAttribute(3, nameof(FakeComponent.ObjectProperty), testObject);
newTree.CloseElement(); newTree.CloseElement();
// Act // Act
@ -696,9 +696,9 @@ namespace Microsoft.AspNetCore.Blazor.Test
// Assert // Assert
AssertEdit(result.Edits.Single(), RenderTreeEditType.PrependNode, 0); AssertEdit(result.Edits.Single(), RenderTreeEditType.PrependNode, 0);
Assert.NotNull(componentInstance); Assert.NotNull(componentInstance);
//Assert.Equal(123, componentInstance.IntProperty); Assert.Equal(123, componentInstance.IntProperty);
Assert.Equal("some string", componentInstance.StringProperty); Assert.Equal("some string", componentInstance.StringProperty);
//Assert.Same(testObject, componentInstance.ObjectProperty); Assert.Same(testObject, componentInstance.ObjectProperty);
} }
[Fact] [Fact]