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New Message on BDOTNET

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From: vipin4dotnet
Message 1 in Discussion

Hello Folks,
           I am trying to Insert username and password in the Database-"login"
           and TableName-"Users". the Fields are-
           UserID  |  UserName |  Password Getting Error:-
               
Cannot insert the value NULL into column 'UserID', table 'login.dbo.Users'; 
olumn does not allow  nulls. INSERT fails.   NOTE- UserID is Primary Key Hence It 
should be Auto-Incremented.
 
 I am trying to Insert with the following Script:- <script runat="server">
   
    Sub Btn_Click(Sender As Object, E As EventArgs)
   
    dim strsql as string = "insert into users(username,password) values _ 
"(@uname,@pwd) SELECT @@IDENTITY as 'Identity'"
    dim constr as string = "server=localhost;database=login;user id=sa;password=;"
   ' dim ds as new dataset()
    dim con as new sqlconnection(constr)
    dim cmd as new sqlcommand(strsql,con)
   cmd.parameters.add("@uname",sqldbtype.varchar,20)
   cmd.parameters.add("@pwd",sqldbtype.varchar,15)
   cmd.parameters("@uname").value = txtuname.text                                ' 
textbox for username
   cmd.parameters("@pwd").value=txtpwd.text                                          ' 
textbox for password
   con.open()
   cmd.executereader()
   con.close() 
............................................
Please Guide me Whats wrong with the above script...  Thanks
                                                                                       
           
                                  Regards  Vipin

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