字符串处理类

 1 using System;
 2 using System.Configuration;
 3 using System.Collections;
 4 using System.Collections.Generic;
 5 using System.Text;
 6 
 7 namespace SQLServerDAL
 8 {
 9     /// <summary>
     /// 字符串处理类
     /// </summary>
     public class FomatString
     {
         #region 字符串截取函数
         /// <summary>
         /// 截取字符串方法
         /// </summary>
         /// <param name="inputString">要截取的原字符串</param>
         /// <param name="len">要截取的长度</param>
         /// <returns>截取后的字符串</returns>
         public string CutString(string inputString, int len)
         {
             ASCIIEncoding ascii = new 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;
         }
         #endregion
     }
 }