Question

大家好，我是新手，还是开始学习代码我创建了一个表单，并使用datagridview来存储数据库数据，还创建了搜索文本框和搜索按钮。但是我想在上面放一个过滤器如果用户要从Diamond班级搜索学生姓名，则他们在第一个组合框中选择Diamon。现在他们想从状态为“缺席”的钻石级学生中搜索学生姓名，因此他们在第二个文本框中输入“缺席”，数据网格显示状态为“缺席”的钻石级学生。你能帮我吗我作为初学者使用vb.net第一编程语言和ms访问权限？我不知道你能告诉我如何做吗

 Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
    If ComboBox1.Text = "Diamon" Then
        If ComboBox2.Text = "StudentName" Then
            Attendance()
        End If
    End If
End Sub

Public Sub Attendance()
    Try
        Dim sCon As String = String.Format("Provider= Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\db.accdb")
        Dim str As String = "SELECT * FROM dbtable WHERE Attendance = @A1"
        Dim dt As New DataTable

        Using con1 As OleDbConnection = New OleDbConnection(sCon)
            con1.Open()
            Using cmd1 As OleDbCommand = New OleDbCommand(str, con1)
                With cmd1.Parameters
                    .Add("@A", OleDbType.VarChar).Value = TextBox1.Text
                End With
                Dim adp As New OleDbDataAdapter(cmd1)
                adp.Fill(dt)
                DataGridView1.DataSource = dt
            End Using
            con1.Close()
        End Using
    Catch ex As Exception
        MsgBox(ex.Message)
    End Try
End Sub

如何过滤我的Datagriview？

0 个答案: