มีปัญหาเกี่ยวกับการ UPDATE ข้อมูลไปยัง MYSQL มัน Error ช่วยดูให้ทีครับ แต่ INSERT ข้อมูลไม่มีปัญหา ผมใส่อะไรผิด

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        mysqlcon.Open()
        With mysqlcmd
            .Connection = mysqlcon
            .CommandText = "UPDATE data SET zzz1 = '" & text1.Text & "',zzz2 = '" & text2.Text & "',zzz3 = '" & text3.Text & "',zzz4 = '" & text4.Text & "',zzz5 = '" & text5.Text & "',zzz6 = '" & text6.Text & "',zzz7 = '" & text7.Text & "',zzz8 = '" & text8.Text & "',text9 = '" & text9.Text & "' WHERE id = " & DataGridView1.SelectedRows(0).Cells(0).Value
            i = .ExecuteNonQuery
        End With
        If i > 0 Then
            MsgBox("แก้ไขข้อมูล เรียบร้อยแล้ว", MsgBoxStyle.Information)
        End If
        mysqlcon.Close()
        showdata()
    End Sub

Imports MySql.Data.MySqlClient
Imports MySql.Data.Types
Imports System.IO
Imports System.Net
Imports System.Data
Imports System

Public Class Form11
    Dim mysqlcon As New MySqlConnection("SERVER=127.0.0.1;USERID=root;PASSWORD=1;DATABASE=test;Character Set=utf8;")
    Dim mysqlcmd As New MySqlCommand
    Dim da As New MySqlDataAdapter
    Dim dt As New DataTable
    Dim i As Integer



    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        DataGridView1.RowTemplate.Height = 30
        showdata()


    End Sub

    Private Sub DataGridView1_CellClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellClick
        id.Text = DataGridView1.Item(0, e.RowIndex).Value
        text1.Text = DataGridView1.Item(1, e.RowIndex).Value
        text2.Text = DataGridView1.Item(2, e.RowIndex).Value
        text3.Text = DataGridView1.Item(3, e.RowIndex).Value
        text4.Text = DataGridView1.Item(4, e.RowIndex).Value
        text5.Text = DataGridView1.Item(5, e.RowIndex).Value
        text6.Text = DataGridView1.Item(6, e.RowIndex).Value
        text7.Text = DataGridView1.Item(7, e.RowIndex).Value
        text8.Text = DataGridView1.Item(8, e.RowIndex).Value
        text9.Text = DataGridView1.Item(9, e.RowIndex).Value
    End Sub


    Private Sub showdata()
        Dim cmd1 As New MySqlCommand
        Dim ada As MySqlDataAdapter
        Dim table As DataTable

        Try
            mysqlcon.Open()
            cmd1.Connection = mysqlcon
            ada = New MySqlDataAdapter("SELECT*FROM data", mysqlcon)
            table = New DataTable
            ada.Fill(table)

            DataGridView1.DataSource = table

            mysqlcon.Close()
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub
 
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click


        If MessageBox.Show("คุณต้องการบันทึกข้อมูลนี้", "ยืนยันการบันทึก", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) = Windows.Forms.DialogResult.OK Then
            mysqlcon.Open()
            With mysqlcmd
                .Connection = mysqlcon
                .CommandText = "INSERT INTO data(zzz1,zzz2,zzz3,zzz4,zzz5,zzz6,zzz7,zzz8,zzz9)VALUES('" & text1.Text & "','" & text2.Text & "','" & text3.Text & "','" & text4.Text & "','" & text5.Text & "','" & text6.Text & "','" & text7.Text & "','" & text8.Text & "','" & text9.Text & "')"
                i = .ExecuteNonQuery

            End With
            If i > 0 Then
                MsgBox("บันทึกข้อมูล เรียบร้อยแล้ว !", MsgBoxStyle.Information)
                reset()

            End If
            mysqlcon.Close()
            showdata()
        Else
            MsgBox("ยกเลิกการบันทึก", MsgBoxStyle.Exclamation)
        End If




    End Sub

    Private Sub Data_History_Bus_Form_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
        If MessageBox.Show("คุณต้องการปิดหน้าต่างนี้", "ออกจากหน้าต่าง", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) = Windows.Forms.DialogResult.OK Then
            e.Cancel = False
        Else
            e.Cancel = True
        End If
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        mysqlcon.Open()
        With mysqlcmd
            .Connection = mysqlcon
            .CommandText = "UPDATE data SET zzz1 = '" & text1.Text & "',zzz2 = '" & text2.Text & "',zzz3 = '" & text3.Text & "',zzz4 = '" & text4.Text & "',zzz5 = '" & text5.Text & "',zzz6 = '" & text6.Text & "',zzz7 = '" & text7.Text & "',zzz8 = '" & text8.Text & "',text9 = '" & text9.Text & "' WHERE id = " & DataGridView1.SelectedRows(0).Cells(0).Value
            i = .ExecuteNonQuery
        End With
        If i > 0 Then
            MsgBox("แก้ไขข้อมูล เรียบร้อยแล้ว", MsgBoxStyle.Information)
        End If
        mysqlcon.Close()
        showdata()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        mysqlcon.Open()
        With mysqlcmd
            .Connection = mysqlcon
            .CommandText = "DELETE FROM data WHERE id = " & id.Text 'DataGridView1.SelectedRows(0).Cells(0).Value
            i = .ExecuteNonQuery
        End With
        If i > 0 Then
            MsgBox("ลบข้อมูล เรียบร้อยแล้ว", MsgBoxStyle.Information)
            reset()
        End If
        mysqlcon.Close()
        showdata()
    End Sub
    Private Sub reset()
        text1.Text = ""
        text2.Text = ""
        text3.Text = ""
        text4.Text = ""
        text5.Text = ""
        text6.Text = ""
        text7.Text = ""
        text8.Text = ""

    End Sub


    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)



    End Sub

End Class