逗号小数点分隔符是由ASP.NET MVC模型绑定忽略 [英] Comma decimal separator is ignored by ASP.NET MVC model binder

问题描述

从http请求120,12在双模式转换为12012。我读了ASP.NET MVC应该处理这样的事情，但我不能使它工作。

120,12 from http request is converted to 12012 in double model. I read that ASP.NET MVC should handle such things but I couldn't make it work

请求：

Accept-Language:da,en;q=0.8,ru;q=0.6,en-US;q=0.4
...
Price: "120,12"

操作方法的模式包括：公共双价{搞定;组; }

Action method' model contains: public double Price { get; set; }

在行动：

var uICulture = Thread.CurrentThread.CurrentUICulture; // {da}
var culture = Thread.CurrentThread.CurrentCulture; // {da-DK}

本地化在的Global.asax <控制/ code> Application_AcquireRequestState 里面的：

var cultureInfo = new CultureInfo("da"); 
Thread.CurrentThread.CurrentUICulture = cultureInfo;
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(cultureInfo.Name);

在您的帮助！

推荐答案

您可以编写一个自定义的模型绑定

You can write a custom model binder.

    public class DecimalModelBinder : IModelBinder
    {
        public object BindModel(ControllerContext controllerContext,
            ModelBindingContext bindingContext)
        {
            var valueResult = bindingContext.ValueProvider
                .GetValue(bindingContext.ModelName);
            var modelState = new ModelState {Value = valueResult};
            object actualValue = null;
            try
            {
                //Check if this is a nullable decimal and a null or empty string has been passed
                var isNullableAndNull = (bindingContext.ModelMetadata.IsNullableValueType &&
                                          string.IsNullOrEmpty(valueResult.AttemptedValue));

                //If not nullable and null then we should try and parse the decimal
                if (!isNullableAndNull)
                {
                    actualValue = decimal.Parse(valueResult.AttemptedValue, NumberStyles.Any, CultureInfo.CurrentCulture);
                }
            }
            catch (FormatException e)
            {
                modelState.Errors.Add(e);
            }

            bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
            return actualValue;
        }
    }
}

只要改变CultureInfo.CurrentCulture到所述一个的用户在decimal.Parse声明已经选择。然后注册在启动新的ModelBinder的。

Just change the CultureInfo.CurrentCulture to that of the one the user has selected in the decimal.Parse statement. Then register the new modelbinder at startup.

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