@Helpers In ASP.NET Core

Question

我想在Razor helper内核中使用.net

我使用这个代码

@{
   void DrawRow(CategoryModel child, int parentNo)
    {
     @<text>
       <tr  style="display: none;">
        <td><span class="treegrid-indent"></span><span class="treegrid-expander"></span>@child.Name</td>
        </td>
       </tr>
      </text>;
     }
 }

但是当使用这个时，得到错误

"@“字符后面必须有":”、"(“)或C#标识符。如果要切换到标记，请使用HTML开始标记，

Answer 1

您可以在视图组件核心应用程序中使用ASP.NET实现相同的需求，如下所示。

ViewComponent类

[ViewComponent(Name = "DrawRow")]
public class DrawRowComponent : ViewComponent
{
    public async Task<IViewComponentResult> InvokeAsync(DrawRowModel model)
    {
        return View(model);
    }
}

ViewComponent Razor视图

@model DrawRowModel

@*display: none;*@

<tr style="">
    <td>
        <span class="treegrid-indent"></span>
        <span class="treegrid-expander"></span>
        @Model.child.Name
    </td>
</tr>

模型类(Es)

public class CategoryModel
{
    public string Name { get; set; }
}

public class DrawRowModel
{
    public CategoryModel child { get; set; }
    public int parentNo { get; set; }
}

调用Test视图页面中的视图组件

@{
    ViewData["Title"] = "Test";


    var model = new DrawRowModel { child = new CategoryModel { Name = "Category" }, parentNo = 0 };
}

<h1>Test</h1>


@for (int i = 1; i < 6; i++)
{
    model.child.Name = "Category" + i.ToString();
    model.parentNo = i;
    <table>
        @await Component.InvokeAsync("DrawRow", model)
    </table>
}

测试结果

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