求教vb.net用户注册功能大概应该怎么实现。

你去学习如何建立窗体，如何调出窗体，隐藏窗体，等等，就可以了。如果这个些不会，你就没法做成注册的。

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vb.net怎么写注册代码

Private Sub 提交_Click()

Dim stemp As String

Dim rs As ADODB.Recordset

Set rs = New ADODB.Recordset

stemp = "select * from user"

rs.Open stemp, CurrentProject.Connection, adOpenKeyset, adLockOptimistic

If Me!密码 确认密码 Then

MsgBox "两次输入的密码不一致，请重新输入", vbExclamation, "Error"

Exit Sub

Else

stemp = "insert into user"

stemp = stemp "(用户名，密码，身份证号)"

stemp = stemp " values('" Me!用户名 "','" Me!密码 "','" Me!身份证号 "')"

DoCmd.RunSQL stemp1

Set rs = Nothing

End If

MsgBox "The information of register have saved already!", vbExclamation, "information"

End Sub

VB.NET 注册代码

写两个函数，一个检测是否有重复用户，第二个插入

检测属用户是否存在

private function checkUser(byval uname as string) as boolean

dim sql as string = "select * from [user] where username=" uname

dim cmd as sqlcommand = new sqlcommand(sql,conn)

dim read as sqldatareader = cmd.excutereader

dim result as boolean = read.hasrows

cmd=nothing

return result

end function

新增用户

private sub adduser(byval uname as string,byval password as string)

if checkUser(uname)

messagebox.show("用户已存在")

exit sub

end if

try

dim sql as string = "insert into [user](username,password) values(@uname,@upass)"

dim cmd as sqlcommand = new sqlcommand(sql,conn)

cmd.parameters.add("@uname",sqldbtype.varchar).value=uname

cmd.parameters.add("@upass",sqldbtype.varchar).value=password

cmd.ExecuteNonQuery

cmd=nothing

messagebox.show("用户添加成功！")

catch ex As Exception

messagebox.show("用户添加失败！" + ex.message)

end try

end sub

vb.net 注册问题

改为：

sql = "insert into 表1 values(用户名='" TextBox1.Text "' ,密码='" TextBox2.Text "')"

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