Question

我想重构视图表单代码以避免copyPaste。但它不起作用。剃刀不允许写

@model System.Linq.Expressions.Expression<Func<TModel, TValue>> expression

和

@Html.Partial("Item", model => model.EmpName)

旧代码，正常工作：

        <tr>
            <td class="editor-label" style="border: 0;">
                @Html.LabelFor(model=>model.EmpName)
            </td>
            <td class="editor-field" style="border: 0">
                @Html.EditorFor(model=>model.EmpName)
                @Html.ValidationMessageFor(model=>model.EmpName)
            </td>
        </tr>
        <tr>
            <td class="editor-label" style="border: 0;">
                @Html.LabelFor(model=>model.Email)
            </td>
            <td class="editor-field" style="border: 0;">
                @Html.EditorFor(model=>model.Email)
                @Html.ValidationMessageFor(model=>model.Email)
            </td>
        </tr>

重构后无效：

Item.cshtml：

   @model System.Linq.Expressions.Expression<Func<TModel, TValue>> expression
        <tr>
            <td class="editor-label" style="border: 0;">
                @Html.LabelFor(expression)
            </td>
            <td class="editor-field" style="border: 0">
                @Html.EditorFor(expression)
                @Html.ValidationMessageFor(expression)
            </td>
        </tr>
    }

新代码：

 @Html.Partial("Item", model => model.EmpName)
 @Html.Partial("Item", model => model.Email)

如何让它发挥作用？

Answer 1

您可以编写自己的HtmlHelper扩展方法，例如：

public static MvcHtmlString MyEditFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression)
{
    var group = new TagBuilder("div");
    group.InnerHtml = html.LabelFor(expression).ToString();
    //more formatting and controls here
    return MvcHtmlString.Create(group.ToString());
}

这将允许你写：

@Html.MyEditFor(m => m.Name)

此方法的缺点是您无法内联HTML，因为这不是视图。但它确实允许您设置标准控件布局。

Answer 2

找到了解决方案。 Thanx到@Paul。

Item.cshtml：

 @model MyClientCustomValidation.Models.LabelEditorValidation 
        <tr>
            <td class="editor-label" style="border: 0;">
                @Model.Label
            </td>
            <td class="editor-field" style="border: 0">
                @Model.Editor
                @Model.Validation
            </td>
        </tr>

哪个有型号：

public class LabelEditorValidation
{
    public MvcHtmlString Label { get; set; }
    public MvcHtmlString Editor { get; set; }
    public MvcHtmlString Validation { get; set; }     
}

内部形式：

@Html.MyEditFor(model=>model.EmpName)
@Html.MyEditFor(model=>model.Email)

MyEditorFor的位置

public static MvcHtmlString MyEditFor<TModel, TProperty>(this HtmlHelper<TModel> html, Expression<Func<TModel, TProperty>> expression)
    {
        return html.Partial("Item", new LabelEditorValidation() { Label = html.LabelFor(expression), Editor = html.EditorFor(expression), Validation = html.ValidationMessageFor(expression) });
    }

重构Html.LabelFor，EditorFor，ValidationMessageFor进入局部视图

2 个答案: