Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim connStr As String
        Dim conn As MySqlConnection
        If Not conn Is Nothing Then conn.Close() ''pooling=false CharSet=gbk;
        connStr = "server=" & TextBox1.Text & "; port=" & TextBox2.Text & "; user id=" & TextBox3.Text & "; password=" & TextBox4.Text & "; database=" & TextBox5.Text & "; "
        Try
            conn = New MySqlConnection(connStr)
            conn.Open()
            Dim sqlstr As String
            Dim checkname As String
            checkname = "admin1"
            Dim rs As MySqlDataReader ''这里定义肯定是错了
            sqlstr = "select * from users  where User='" + checkname + "'"
            TextBox8.Text = rs.GetByte(sqlstr) '这里也错了 求助想在textbox8显示出所要内容写法

            conn.Close()
        Catch ex As MySqlException
            TextBox8.Text = "连接到服务器的错误：" + ex.Message
        End Try
    End Sub

[招生]科锐逆向工程师培训(2024年11月15日实地，远程教学同时开班, 第51期)