问题描述
在Blazor .razor 文件中,您可以使用@typeparam MyType
使用通用参数.例如:
In a Blazor .razor file you can use @typeparam MyType
to use generic parameters.For example:
MyComponent.razor
@typeparam MyType
<SomeHtml />
@code
{
[Parameter]
public List<MyType> MyList{ get; set; }
}
因此您可以致电:
<MyComponent MyType="MyTypeABC" MyList="@MyData.MyList" />
但是我更喜欢(razor.cs)后面的代码,如何在razor.cs文件中使用像@typeparam MyType
这样的类型的参数?
But I prefer code behind (razor.cs), how can I use a parameter for type like @typeparam MyType
in the razor.cs file?
我当前的解决方法是:
MyComponent.razor
@inherits MyComponentCode<MyType>
@typeparam MyType
MyComponent.razor.cs
public class MyComponentCode<MyType> : ComponentBase
{
[Parameter]
public List<MyType> MyList{ get; set; }
}
我想念[TypeParameter]
之类的东西,但是也许有更好的解决方案,有什么想法吗?也许这是关于如何在后面的代码中使用razor @statements"的一般问题.
I miss something like [TypeParameter]
, but maybe there are better solutions, any ideas? Or maybe it's a general question about "how to use razor @statements in a code behind".
从2020-02-27更新:
Update from 2020-02-27:
在罗杰·沃尔夫(见下文)的建议下,一种更好的方法:
With suggestion from Roger Wolf (see below), a bit better way:
MyComponent.razor
@typeparam MyType
MyComponent.razor.cs
public partial class MyComponent<MyType>
{
[Parameter]
public List<MyType> MyList{ get; set; }
}
致电
<MyComponent MyType="MyTypeABC" />
推荐答案
您非常接近,只需在类定义中添加partial
:
You were pretty close, just need to add partial
to the class definition:
using Microsoft.AspNetCore.Components;
namespace BlazorApp1.Components
{
public partial class MyCustomComponent<T> : ComponentBase
{
[Parameter]
public string Label { get; set; }
}
}
剃刀部分:
@namespace BlazorApp1.Components
@typeparam T
<label>@($"{Label}. Provided type is {typeof(T).Name.ToUpper()}")</label>
用法(Index.razor):
The usage (Index.razor):
@page "/"
@using BlazorApp1.Components
<MyCustomComponent T="long" Label="Custom component label" />
这样,您就不需要继承它的组件,因为它们都成为同一个类的一部分.
This way, you wouldn't need inheriting your component from it, as both become parts of the same class.
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