Substring()、lastIndexOf()的用法

lastIndexOf()

例如：

 

string str = "abcdefg";
str = str.Substring(0, str.LastIndexOf("c"));
Response.Write(str);

//结果为 ab    
//就是截取c前面的字符串。

Substring()

例如:

　　string qian = null;
    string hou = null;
    string str = "abcdefg";
    qian = str.Substring(0, 1);//从第一个开始截取，共截取一位
    hou = str.Substring(str.Length - 1, 1);//从最后一个开始截取，共截取一位
    Response.Write(qian + "***" + hou);

    //结果为a***g

 

评论人：<%#Eval("userIp").ToString().Substring(0,1)+"***" + Eval("userIp").ToString().Substring(Eval("userIp").ToString().Length - 1, 1)  %>

输出效果：

 

 

 

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标签：lastIndexOf,string,qian,截取,用法,Substring,location,str
来源： https://www.cnblogs.com/lyj0810/p/16341075.html