DisplayFormat为TextBoxFor在MVC [英] DisplayFormat for TextBoxFor in MVC

问题描述

我需要4位十进制四舍五入到2位数，展现在MVC 3 UI

事情是这样的58.8964至58.90

试过下面这个<一个href=\"http://stackoverflow.com/questions/5080451/how-should-i-use-editorfor-in-mvc-for-a-currency-money-type\">How我应该使用MVC EditorFor（）的货币/货币类型？但不工作。

  

由于我使用我TextBoxFor =>我删除ApplyFormatInEditMode在这里。甚至
  我试着用ApplyFormatInEditMode，但没有任何工程。仍呈现
  我58.8964。

MyModelClass

  [DisplayFormat（DataFormatString ={0：F2}）]
 公共小数？总金额{搞定;组; } @ Html.TextBoxFor（M = GT; m.TotalAmount）
 

我怎样才能做到这轮关闭？的

我不能使用EditorFor（M => m.TotalAmount）在这里，因为我需要通过一些htmlAttributes

编辑：

与MVC源$ C ​​$ C调试后，他们在内部使用

 字符串valueParameter = Convert.ToString（值，CultureInfo.CurrentCulture）;
 

在MvcHtmlString InputHelper（）InputExtension.cs的方法，该方法的目标值为的参数和转换。他们没有使用任何有显示格式。我们怎么能解决？

我设法用这种方式来解决。因为我有一个自定义的帮手，我可以能够与低于code管理

 如果（！string.IsNullOrEmpty（modelMetaData.DisplayFormatString））
   {
     字符串的formatString = modelMetaData.DisplayFormatString;
     字符串FormattedValue的=的String.Format（CultureInfo.CurrentCulture，formatString中，modelMetaData.Model）;
     字符串名称=前pressionHelper.GetEx pressionText（如pression）;
     字符串全名= htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName（名）;
       返回htmlHelper.TextBox（全名，FormattedValue的，htmlAttributes）;
   }
   其他
   {
       返回htmlHelper.TextBoxFor（如pression，htmlAttributes）;
   }
 

解决方案

您应该使用 Html.EditorFor 而不是 Html.TextBoxFor 如果要考虑到自定义格式：

  @ Html.EditorFor（M = GT; m.TotalAmount）
 

另外，还要确保您已设置 ApplyFormatInEditMode 为true：

  [DisplayFormat（DataFormatString ={0：F2}，ApplyFormatInEditMode = TRUE）]
公共小数？总金额{搞定;组; }
 

该DisplayFormat属性旨在与模板佣工只用于诸如 EditorFor 和 DisplayFor 。这是推荐的方法，而不是使用 TextBoxFor 。

I need to round off 4 digit decimal to 2 digits and show in MVC 3 UI

Something like this 58.8964 to 58.90

Tried following this How should I use EditorFor() in MVC for a currency/money type? but not working.

As i am using TextBoxFor=> i removed ApplyFormatInEditMode here. Even i tried with ApplyFormatInEditMode , but nothing works. Still showing me 58.8964.

MyModelClass

 [DisplayFormat(DataFormatString = "{0:F2}")]
 public decimal? TotalAmount { get; set; }

 @Html.TextBoxFor(m=>m.TotalAmount)

How can i achieve this round off?

I can't use EditorFor(m=>m.TotalAmount) here, as i need to pass some htmlAttributes

Edit:

After debugging with MVC source code, they internally use

 string valueParameter = Convert.ToString(value, CultureInfo.CurrentCulture);

in MvcHtmlString InputHelper() method of InputExtension.cs that takes object value as parameter and converting. They are not using any display format there. How could we fix?

I managed to fix in this way. As i have a custom helper, i can able to manage with the below code

 if (!string.IsNullOrEmpty(modelMetaData.DisplayFormatString))
   {
     string formatString = modelMetaData.DisplayFormatString;
     string formattedValue = String.Format(CultureInfo.CurrentCulture, formatString, modelMetaData.Model);
     string name = ExpressionHelper.GetExpressionText(expression);
     string fullName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name);
       return htmlHelper.TextBox(fullName, formattedValue, htmlAttributes);
   }
   else
   {
       return htmlHelper.TextBoxFor(expression, htmlAttributes);
   }

解决方案

You should use Html.EditorFor instead of Html.TextBoxFor if you want the custom format to be taken into account:

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

Also make sure that you have set ApplyFormatInEditMode to true:

[DisplayFormat(DataFormatString = "{0:F2}", ApplyFormatInEditMode = true)]
public decimal? TotalAmount { get; set; }

The DisplayFormat attribute is intended to be used only with templated helpers such as EditorFor and DisplayFor. This is the recommended approach instead of using TextBoxFor.

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