如何在asp.net c＃中的另一个文本框中拆分电子邮件ID并显示@之前的文本

Question

It is a web application i have login it some fields like name,email id,login name like that but i need to split the email id @ before text it will display automatically in login name text box. when i entered email id split and display another name another text box like this:

i want to display like this

 eamil id: xyz@gmail.com login name: xyz 

i tried this code but not working:

String str= txtemailid.Text;
String[] name=str.split('@');
txtloginname.Text=name[0].Tostring();

can any one help me out

Answer 1

Here is working example ; It is better to check for the array Length after split since there may be a chance for entering wrong input, that may lead to exception in case of invalid input;

string str= "xyz@gmail.com";
string[] name=str.Split('@');
if (name.Length > 1)
 {
    Console.WriteLine("login name:{0}", name[0]);
    Console.WriteLine("login Domain:{0}", name[1]);  
 }

I thing You have not compile your code; since it having lots of errors;

split() will be .Split() S is capital; Tostring() will be ToString() here also S is capital; Here .ToString() is not necessary since name is a string array. And one more Thing in C# String and string are Different ; so use string to declare variables;

Answer 2

var email = "xyz@gmail.com";
var name = email.Substring(0, email.IndexOf('@'));
Console.WriteLine(name);

Simply without index of array.

Answer 3

string email = "xyz@gmail.com";
var name = email.Split('@')[0];

This works, but split is called with capital S. C# is case sensitive.

Answer 4

You only need to change to capital "S" in two words (Split and ToString). If you do it, your code will work:

String str = txtemailid.Text;
String[] name = str.Split('@');
txtloginname.Text = name[0].ToString();