字符串处理

Title#region GetSubString
 /// <summary>
 /// 取得指定开始和结束字符串中间的数据串
 /// </summary>
 /// <param name="content"></param>
 /// <param name="startStr"></param>
 /// <param name="endStr"></param>
 /// <returns></returns>
 protected string GetSubString(string content, string startStr, string endStr)
 {
 try
 {
 int indexStart = content.IndexOf(startStr);
 if (indexStart >= 0)
 {
 int indexEnd = content.IndexOf(endStr, indexStart + startStr.Length);
 if (indexEnd >= 0)
 {
 return content.Substring(indexStart + startStr.Length, indexEnd - indexStart - startStr.Length);

     }
    }
   }
   catch (Exception ex)
   {
   }

return string.Empty;
}

/// <summary>
 /// 取得指定结束字符串中间的数据串
 /// </summary>
 /// <param name="content"></param>
 /// <param name="endStr"></param>
 /// <returns></returns>
 protected string GetSubString(string content, string endStr)
 {
 try
 {
 int indexStart = 0;

    int indexEnd = content.IndexOf(endStr, 0);
    if (indexEnd >= 0)
    {
     return content.Substring(indexStart, indexEnd);

    }
   }
   catch (Exception ex)
   {
   }

   return string.Empty;
  }
  #endregion

#region Replace
 /// <summary>
 ///
 /// </summary>
 /// <param name="content"></param>
 /// <param name="startStr"></param>
 /// <param name="endStr"></param>
 /// <param name="newValue"></param>
 /// <returns></returns>
 protected string Replace(string content, string startStr, string endStr, string newValue)
 {
 return Replace(content, startStr, endStr, newValue, true);
 }

/// <summary>
 ///
 /// </summary>
 /// <param name="content"></param>
 /// <param name="startStr"></param>
 /// <param name="endStr"></param>
 /// <param name="newValue"></param>
 /// <param name="onlyReplaceFirst"></param>
 /// <returns></returns>
 protected string Replace(string content, string startStr, string endStr, string newValue, bool onlyReplaceFirst)
 {
 try
 {
 string result = this.GetSubString(content, startStr, endStr);

string str = startStr + result + endStr;

//Response.Write(" " + Server.HtmlEncode(str) + " ");

    if (!onlyReplaceFirst)
    {
     return content.Replace(startStr + result + endStr, newValue);
    }
    else
    {
     int indexStr = content.IndexOf(str);

     if (indexStr >= 0)
     {
      //得到前辍
      string preStr = content.Substring(0, indexStr);

content = content.Substring(indexStr, content.Length - preStr.Length);

//得到后辍
string lastStr = content.Substring(str.Length, content.Length - str.Length);

      return preStr + lastStr;
     }
    }

   }
   catch (Exception ex)
   {
   }

return content;
 }
 #endregion#region GetSubString
 /// <summary>
 /// 取得指定开始和结束字符串中间的数据串
 /// </summary>
 /// <param name="content"></param>
 /// <param name="startStr"></param>
 /// <param name="endStr"></param>
 /// <returns></returns>
 protected string GetSubString(string content, string startStr, string endStr)
 {
 try
 {
 int indexStart = content.IndexOf(startStr);
 if (indexStart >= 0)
 {
 int indexEnd = content.IndexOf(endStr, indexStart + startStr.Length);
 if (indexEnd >= 0)
 {
 return content.Substring(indexStart + startStr.Length, indexEnd - indexStart - startStr.Length);