AJAX之xmlHttp

来源：教程360

'''

''' 检测用户是否存在
'''

''' Created by dzh @2006/06/27 18:22
Partial Class Web_User_CheckUser
Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Request.QueryString("LogonName") Is Nothing Then
Response.Write("false" + "?EX")
Response.End()
Exit Sub
End If

If (New EasyClick.EasyBusiness.UserBusiness).GetUserByLogonName(Request.QueryString("LogonName").ToString) Is Nothing Then
Response.Write("false" + "?EX")
Response.End()
Exit Sub
Else
Response.Write("true" + "?EX")
Response.End()
Exit Sub
End If
End Sub
End Class