VB.NET VB

可以用此做VB的实训 Public Class Form8 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim f5 As New Form5 Module1.db() conn.Open() ds.Clear() cmd.CommandText = "select sno,password from stu" da.SelectCommand = cmd da.Fill(ds) Dim i As Integer For i = 0 To ds.Tables(0).Rows.Count - 1 If TextBox1.Text = ds.Tables(0).Rows(i).Item(0) Then If TextBox2.Text = ds.Tables(0).Rows(i).Item(1) Then If TextBox1.Text <> "jolan" Then Form5.维护ToolStripMenuItem.Dispose() End If If (TextBox1.Text = "jolan" And RadioButton1.Checked = True) Or (TextBox1.Text <> "jolan" And RadioButton2.Checked = True) Then Form5.Show() Me.Hide() Exit For End If End If End If Next If i = ds.Tables(0).Rows.Count Then MsgBox("登录失败!") End If conn.Close() End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click End End Sub End Class