数据库开发002测试SQL语句

Imports System.Data.OleDb
Public Class Form1
    Dim conn As OleDbConnection
    Dim comm As OleDbCommand
    Dim dataAdapter As OleDbDataAdapter
    Dim ds As New DataSet
    Dim dt As New DataTable
    Private Function GetConnection() As OleDbConnection
        Return New OleDbConnection(My.Settings.personConnectionString)
    End Function

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            conn = GetConnection()
            'Dim strComm As String = ""'这里需要输入完整的SQL语句

            'Dim strComm As String = "select * from grade where 姓名 like '%" & TextBox1.Text & "%'"
            'Dim strComm As String = insert into grade(学号,姓名,数学) values (99,'小蔡',128)
            'Dim strComm As String = delete from grade where 姓名='小蔡'
            'Dim strComm As String = update grade set 数学=165 where 姓名='小蔡'

            conn.Open()
            comm = New OleDbCommand(TextBox1.Text, conn)
            comm.ExecuteNonQuery()
            conn.Close()

            MsgBox("成功")
        Catch ex As Exception
            MsgBox("有错")
        End Try

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        ds.Clear()
        DataGridView1.DataSource = ds

        conn = GetConnection()
        Dim strComm As String = "select * from grade"
        dataAdapter = New OleDbDataAdapter(strComm, conn)
        dataAdapter.Fill(ds, "grade")

        DataGridView1.DataSource = ds.Tables("grade")
        DataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        ds.Clear()
        DataGridView1.DataSource = ds

        'Dim strComm As String = "select * from grade where 性别='男'"
        Dim strComm As String = "select * from grade where 姓名 like '%" & TextBox1.Text & "%'"
        'Dim strComm As String =insert into grade(学号,姓名,数学) values (99,'小蔡',128)
        'Dim strComm As String =delete from grade where 姓名='小蔡'
        'Dim strComm As String =update grade set 数学=165 where 姓名='小蔡'
        'Dim strComm As String = TextBox1.Text '


        dataAdapter = New OleDbDataAdapter(strComm, GetConnection)
        dataAdapter.Fill(ds, "grade")
        DataGridView1.DataSource = ds.Tables("grade")
        DataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill
    End Sub
End Class