Utility/CutString.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Utility
{
   public  class CutString
    {
       public static string Text(string inputString, int len)
       {


           System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
           int tempLen = 0;
           string tempString = "";
           byte[] s = ascii.GetBytes(inputString);
           for (int i = 0; i < s.Length; i++)
           {
               if ((int)s[i] == 63)
               {
                   tempLen += 2;
               }
               else
               {
                   tempLen += 1;
               }

               try
               {
                   tempString += inputString.Substring(i, 1);
               }
               catch
               {
                   break;
               }

               if (tempLen > len)
                   break;
           }
           //如果截过则加上半个省略号
           byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
           if (mybyte.Length > len)
               tempString += "…";
           return tempString;
       }
    }
}