.NET截取指定长度汉字超出部分以"..."代替

///<summary> 
/// 将指定字符串按指定长度进行剪切， 
///</summary> 
///<param name= "oldStr "> 需要截断的字符串 </param> 
///<param name= "maxLength "> 字符串的最大长度 </param> 
///<param name= "endWith "> 超过长度的后缀 </param> 
///<returns> 如果超过长度，返回截断后的新字符串加上后缀，否则，返回原字符串 </returns>
publicstaticstring StringTruncat(string oldStr, int maxLength, string endWith)
{
if (string.IsNullOrEmpty(oldStr))
// throw new NullReferenceException( "原字符串不能为空 "); 
return oldStr + endWith;
if (maxLength <1)
thrownew Exception("返回的字符串长度必须大于[0] ");
if (oldStr.Length > maxLength)
{
string strTmp = oldStr.Substring(0, maxLength);
if (string.IsNullOrEmpty(endWith))
return strTmp;
else
return strTmp + endWith;
}
return oldStr;
} 

 简单方法

  //截取字符串函数
        protected string PartSubString(string s)
        {
            if (s.Length > 5)
            {
                return s.Substring(0, 5) + "...";
            }
            return s;
        }

 

调用

 <asp:Label ID="Label22" runat="server" Text='<%# PartSubString(DataBinder.Eval(Container.DataItem,"Note").ToString()) %>'
                                                        ToolTip='<%# Bind("Note") %>'></asp:Label>