说明: VB与sql设计代码: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click '选择普通用户登录 If Me.RadioButton1.Checked Then Dim str As String str = "data source=PC-201103171305\SQLEXPRESS;database=学生信息库;user id=
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