如何匹配数据库中的数据而无需回传,如比较验证器? [英] how to match the data from database without post back like compare validater ?
问题描述
我想匹配数据库中的用户名吗?
没有回复像'odesk.com'
i想要使用这个像比较验证器
任何人都可以帮我吗?
受保护的 Sub btnSignup_Click( ByVal sender As 对象, ByVal e As EventArgs)句柄 btnSignup.Click
con.Open()
com.Connection = con
com.CommandText = SELECT userName FROM signUp WHERE userName = @ userName
com.Parameters.Add( 新 SqlClient.SqlParameter( @ userName txtUsername.Text))
Dim str As 字符串 = com.ExecuteScalar
如果 str = 然后
lblusernametaken.Visible = False
其他
lblusernametaken.Visible = True
退出 Sub
结束 如果
结束 sub
i想要删除此按钮点击活动
请帮助我
谢谢
i want to match the username from database ? 这篇关于如何匹配数据库中的数据而无需回传,如比较验证器?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
http://www.aspsnippets.com/Articles/Check-UserName-Availability-in-ASP.Net-using-JQuery.aspx [ ^ ]
without post back like 'odesk.com'
i want to use this like compare validater
any one can help me please ?
Protected Sub btnSignup_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnSignup.Click
con.Open()
com.Connection = con
com.CommandText = "SELECT userName FROM signUp WHERE userName =@userName"
com.Parameters.Add(New SqlClient.SqlParameter("@userName", txtUsername.Text))
Dim str As String = com.ExecuteScalar
If str = "" Then
lblusernametaken.Visible = False
Else
lblusernametaken.Visible = True
Exit Sub
End If
End sub
i want to remove this button click event
plz help me
thank youCheck this
http://www.aspsnippets.com/Articles/Check-UserName-Availability-in-ASP.Net-using-JQuery.aspx[^]