如何检查用户名 [英] how to check username

问题描述

如何通过点击按钮来检查用户名?
它必须检查sql server中的数据库.

How to check the username by hitting a button?
It has to check a database in sql server.
How to write the codebehind code for that?

推荐答案

^ ]

http://www.dotnetspider.com/resources/7450-Check-Username-Exists-或否 [^ ]

http://forums.asp.net/t/1567065.aspx?UserName+exist+in+database+or+not%3F[^]

http://www.dotnetspider.com/resources/7450-Check-Username-Exists-or-Not[^]

string struname = txtusername.Text;

ds = new DataSet();
ada = new SqlDataAdapter("SELECT username FROM DBFile WHERE id ="+userid, con);
ada.Fill(ds, "DBFile");

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