去掉字符串两边空格，全角转半角

TrimToDBCModelBinder.cs

 1 //一定要使用using System.Web.Mvc下的DefaultModelBinder
 2     public class TrimToDBCModelBinder : DefaultModelBinder
 3     {
 4         
 5         public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
 6         {            
 7             object value = base.BindModel(controllerContext, bindingContext);
 8             if(value is string)
 9             {
10                 string strValue = (string)value;
11                 string value2 = ToDBC(strValue).Trim();
12                 return value2;
13             }
14             else
15             {
16                 return value;
17             }
18         }
19 
20         /// <summary> 全角转半角的函数(DBC case) </summary>
21         /// <param name="input">任意字符串</param>
22         /// <returns>半角字符串</returns>
23         ///<remarks>
24         ///全角空格为12288，半角空格为32
25         ///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248
26         ///</remarks>
27         private static string ToDBC(string input)
28         {
29             char[] c = input.ToCharArray();
30             for (int i = 0; i < c.Length; i++)
31             {
32                 if (c[i] == 12288)
33                 {
34                     c[i] = (char)32;
35                     continue;
36                 }
37                 if (c[i] > 65280 && c[i] < 65375)
38                 {
39                     c[i] = (char)(c[i] - 65248);
40                 }
41             }
42             return new string(c);
43         }
44 
45     }

然后在mvc项目的global.asax.cs下的Application_Start()加入

1 ModelBinders.Binders.Add(typeof(string),new TrimToDBCModelBinder());
2             ModelBinders.Binders.Add(typeof(int), new TrimToDBCModelBinder());
3             ModelBinders.Binders.Add(typeof(long), new TrimToDBCModelBinder());
4             ModelBinders.Binders.Add(typeof(double), new TrimToDBCModelBinder());

这样，就可以对string、int、long、double类型起作用了。

来源：https://www.cnblogs.com/dotnetHui/p/8440437.html