ModelBinder 请求容错性

    //using System.Web.Mvc;
    public class TrimToDBCModelBinder : DefaultModelBinder
    {
        public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
        {
            object value = base.BindModel(controllerContext, bindingContext);
            if (value is string)
            {
                var strValue = (string)value;
                strValue = ToDBC(strValue).Trim(); 
                return strValue;
            }
            else
            {
                return value;
            }
        }

        /// <summary> 全角转半角的函数(DBC case) 
        /// <para>全角空格为12288，半角空格为32</para>
        /// <para>其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248</para>
        /// </summary>
        /// <returns>半角字符串</returns>
        private static string ToDBC(string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 12288)
                {
                    c[i] = (char)32;
                    continue;
                }
                if (c[i] > 65280 && c[i] < 65375)
                {
                    c[i] = (char)(c[i] - 65248);
                }
            }
            return new string(c);
        }
    }

            ModelBinders.Binders.Add(typeof(string), new TrimToDBCModelBinder());
            ModelBinders.Binders.Add(typeof(int), new TrimToDBCModelBinder());
            ModelBinders.Binders.Add(typeof(long), new TrimToDBCModelBinder());
            ModelBinders.Binders.Add(typeof(double), new TrimToDBCModelBinder());