[英]Format decimal value with comma MVC 5
我有个问题! 我正在使用Mvc5,并且具有这样的属性。
[DisplayFormat(DataFormatString = "{0:n2}", ApplyFormatInEditMode = true)]
public decimal Total { get; set; }
和剃刀:
@Html.EditorFor(modelItem => Model.Total, new { htmlAttributes = new { @class = "form-control input-sm" } })
此时没有错误。 但是,如果我发送1.300,40,则我总是得到0。
但是,如果我发送1300,40,则我得到正确的值。 我该如何解决? 如果我发送1300,50或1.300,40,我想获取正确的值
您将必须添加自己的ModelBinder
:
public class DecimalModelBinder : IModelBinder
{
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
var valueResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
var modelState = new ModelState { Value = valueResult };
decimal actualValue = 0;
try
{
actualValue = Convert.ToDecimal(valueResult.AttemptedValue,
CultureInfo.CurrentCulture);
}
catch (FormatException e)
{
modelState.Errors.Add(e);
}
bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
return actualValue;
}
}
并在您的Application_Start中注册:
ModelBinders.Binders.Add(typeof(decimal), new DecimalModelBinder());
参考: http : //haacked.com/archive/2011/03/19/fixing-binding-to-decimals.aspx/
如果我们想为所有c#值类型使用通用ModelBinder,则
using System;
using System.Globalization;
using System.Web.Mvc;
public class ValueTypeModelBinder<T> : IModelBinder
{
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
var valueResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
var modelState = new ModelState { Value = valueResult };
var result = default(T);
try
{
var srcValue = valueResult.AttemptedValue;
var targetType = typeof(T);
//Hp --> Logic: Check whether target type is nullable (or) not?
//If Yes, Take underlying type for value conversion.
if (targetType.IsGenericType &&
targetType.GetGenericTypeDefinition().Equals(typeof(Nullable<>)))
{
targetType = Nullable.GetUnderlyingType(targetType);
}
if (targetType.IsValueType && (!string.IsNullOrWhiteSpace(srcValue)))
{
result = (T)Convert.ChangeType(srcValue, targetType, CultureInfo.CurrentUICulture);
}
}
catch (Exception ex)
{
modelState.Errors.Add(ex);
}
bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
return result;
}
}
添加上述类之后,在Global.asax.cs文件的“ Application_Start”方法下配置ModelBinders。
using System.Web;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
public class MvcApplication : HttpApplication
{
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
ModelBinders.Binders.Add(typeof(decimal?), new ValueTypeModelBinder<decimal?>());
ModelBinders.Binders.Add(typeof(decimal), new ValueTypeModelBinder<decimal>());
ModelBinders.Binders.Add(typeof(int), new ValueTypeModelBinder<int>());
ModelBinders.Binders.Add(typeof(double?), new ValueTypeModelBinder<double?>());
}
}
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