双输入MVC扩展

Question

在这里，我试图让与双输入框

返回模型的属性是空的扩展， 他们没有正确绑定或这里还有另外一个问题， 请帮我写这个扩展名并利用它。 我需要在我的代码中使用它数千次。

public static class DoubleBoxHelper 
{ 
    public static MvcHtmlString DoubleBoxFor<TModel, TProperty>(
     this HtmlHelper<TModel> htmlHelper, 
     //int id, 
     Expression<Func<TModel, TProperty>> expression) 
    { 
     var builder = new StringBuilder(); 
     var metadata = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData); 
     var model = metadata.Model as DoubleNumber; 
     var name = ExpressionHelper.GetExpressionText(expression); 
     var fullName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name); 
     var fieldId = TagBuilder.CreateSanitizedId(fullName); 

     // 1st TextBox 
     var tagInputLeft = new TagBuilder("input"); 
     tagInputLeft.Attributes.Add("name", fullName); 
     tagInputLeft.Attributes.Add("id", fieldId + 1); 
     tagInputLeft.Attributes.Add("type", "text"); 
     tagInputLeft.Attributes.Add("value", model.Num1 == null ? "" : model.Num1.ToString()); 

     // 2nd TextBox 
     var tagInputRight = new TagBuilder("input"); 
     tagInputRight.Attributes.Add("name", fullName); 
     tagInputRight.Attributes.Add("id", fieldId + 2); 
     tagInputRight.Attributes.Add("type", "text"); 
     tagInputRight.Attributes.Add("value", model.Num2 == null ? "" : model.Num2.ToString()); 

     builder.Append(tagInputLeft.ToString(TagRenderMode.SelfClosing)); 
     builder.Append(tagInputLeft.ToString(TagRenderMode.SelfClosing)); 
     return new MvcHtmlString(builder.ToString()); 
    } 
} 

Model类

public class DoubleNumber 
{ 
    public int Num1 { get; set; } // tried strings but again they are null 
    public int Num2 { get; set; } 
} 

，这里是我们需要输入的数字控制器 - 后动作

[HttpPost] 
public ActionResult Index(DoubleNumber g) 
{ 
    int iNum1 = g.Num1; // int or string doesn't matter, it couldn't get the entered(modified) model 
    int iNum2 = g.Num2; 
    var vm = ViewModelOf(g); 
    return View(vm); 
} 

Answer 1

你可能有一个更容易的时间只用编辑模板：

浏览\共享\ EditorTemplates \ DoubleNumber.cshtml

@model DoubleNumber 
@Html.TextBoxFor(m => m.Num1) 
@Html.TextBoxFor(m => m.Num2) 

然后，在你的看法：

@Html.EditorForModel() 

或者，如果你有DoubleNumber类型的属性上的视图模型：

@Html.EditorFor(m => m.MyDoubleNumberProperty)