我实现了自定义验证器,添加了分组的有效性。问题(在下面的代码中解决)是parse方法会删除所有的千位分隔符,所以1,2,2也被认为是有效的。
这是我的十进制绑定器。
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web.Mvc;
namespace EA.BUTruck.ContactCenter.Model.Extensions
{
public class DecimalModelBinder : IModelBinder
{
public object BindModel(ControllerContext controllerContext,
ModelBindingContext bindingContext)
{
ValueProviderResult valueResult = bindingContext.ValueProvider
.GetValue(bindingContext.ModelName);
ModelState modelState = new ModelState { Value = valueResult };
object actualValue = null;
try
{
var trimmedvalue = valueResult.AttemptedValue.Trim();
actualValue = Decimal.Parse(trimmedvalue, CultureInfo.CurrentCulture);
string decimalSep = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
string thousandSep = CultureInfo.CurrentCulture.NumberFormat.NumberGroupSeparator;
thousandSep = Regex.Replace(thousandSep, @"\u00A0", " ");
if (trimmedvalue.IndexOf(thousandSep) >= 0)
{
string integerpart = trimmedvalue.Split(new string[] { decimalSep }, StringSplitOptions.None)[0];
string reconvertedvalue = Regex.Replace(((decimal)actualValue).ToString("N").Split(new string[] { decimalSep }, StringSplitOptions.None)[0], @"\u00A0", " ");
if (integerpart == reconvertedvalue)
return actualValue;
int nThousands = integerpart.Count(x => x == thousandSep[0]);
int nThousandsconverted = reconvertedvalue.Count(x => x == thousandSep[0]);
if (nThousands == nThousandsconverted)
{
int[] groupsize = CultureInfo.CurrentCulture.NumberFormat.NumberGroupSizes;
bool valid = ValidateNumberGroups(integerpart, thousandSep, groupsize);
if (!valid)
throw new FormatException();
}
else
throw new FormatException();
}
}
catch (FormatException e)
{
modelState.Errors.Add(e);
}
bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
return actualValue;
}
private bool ValidateNumberGroups(string value, string thousandSep, int[] groupsize)
{
string[] parts = value.Split(new string[] { thousandSep }, StringSplitOptions.None);
for (int i = parts.Length - 1; i > 0; i--)
{
string part = parts[i];
int length = part.Length;
if (groupsize.Contains(length) == false)
{
return false;
}
}
return true;
}
}
}
对于可空的十进制数,您需要在之前添加一些代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web.Mvc;
namespace EA.BUTruck.ContactCenter.Model.Extensions
{
public class DecimalNullableModelBinder : IModelBinder
{
public object BindModel(ControllerContext controllerContext,
ModelBindingContext bindingContext)
{
ValueProviderResult valueResult = bindingContext.ValueProvider
.GetValue(bindingContext.ModelName);
ModelState modelState = new ModelState { Value = valueResult };
object actualValue = null;
try
{
if (string.IsNullOrWhiteSpace(valueResult.AttemptedValue))
return actualValue;
var trimmedvalue = valueResult.AttemptedValue.Trim();
actualValue = Decimal.Parse(trimmedvalue,CultureInfo.CurrentCulture);
string decimalSep = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
string thousandSep = CultureInfo.CurrentCulture.NumberFormat.NumberGroupSeparator;
thousandSep = Regex.Replace(thousandSep, @"\u00A0", " ");
if (trimmedvalue.IndexOf(thousandSep) >=0)
{
string integerpart = trimmedvalue.Split(new string[] { decimalSep }, StringSplitOptions.None)[0];
string reconvertedvalue = Regex.Replace(((decimal)actualValue).ToString("N").Split(new string[] { decimalSep }, StringSplitOptions.None)[0], @"\u00A0", " ");
if (integerpart == reconvertedvalue)
return actualValue;
int nThousands = integerpart.Count(x => x == thousandSep[0]);
int nThousandsconverted = reconvertedvalue.Count(x => x == thousandSep[0]);
if(nThousands == nThousandsconverted)
{
int[] groupsize = CultureInfo.CurrentCulture.NumberFormat.NumberGroupSizes;
bool valid = ValidateNumberGroups(integerpart, thousandSep, groupsize);
if (!valid)
throw new FormatException();
}
else
throw new FormatException();
}
}
catch (FormatException e)
{
modelState.Errors.Add(e);
}
bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
return actualValue;
}
private bool ValidateNumberGroups(string value, string thousandSep, int[] groupsize)
{
string[] parts = value.Split(new string[] { thousandSep }, StringSplitOptions.None);
for(int i = parts.Length-1; i > 0; i--)
{
string part = parts[i];
int length = part.Length;
if (groupsize.Contains(length) == false)
{
return false;
}
}
return true;
}
}
}
您需要为double、double?、float和float?创建类似的绑定器(代码与DecimalModelBinder和DecimalNullableModelBinder相同;只需要在其中"type"出现的2个位置上替换类型即可)。
接下来,在global.asax中进行设置。
ModelBinders.Binders.Add(typeof(decimal), new DecimalModelBinder());
ModelBinders.Binders.Add(typeof(decimal?), new DecimalNullableModelBinder());
ModelBinders.Binders.Add(typeof(float), new FloatModelBinder());
ModelBinders.Binders.Add(typeof(float?), new FloatNullableModelBinder());
ModelBinders.Binders.Add(typeof(double), new DoubleModelBinder());
ModelBinders.Binders.Add(typeof(double?), new DoubleNullableModelBinder());
这个解决方案在服务器端运行良好,客户端部分使用jquery globalize以及我在此处报告的修复
https://github.com/globalizejs/globalize/issues/73#issuecomment-275792643。