Hi all could someone just point out whats my problem?

attached is the screenshot and the code

Imports MySql.Data.MySqlClient

Public Class Form1
    Dim mysqlconn As MySqlConnection
    Dim command As MySqlCommand
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        mysqlconn = New MySqlConnection
        mysqlconn.ConnectionString =
        "Data Source=DESKTOP-4CJK3CC\SQLEXPRESS;Initial Catalog=Inventory;Integrated Security=True"
        Dim reader As MySqlDataReader
        Try
            mysqlconn.Open()
            Dim query As String
            query = "insert into dbo.item (ItemID,Item,asset,item_description,quantity,quantity_description, brand_name,product_name_code,serial,location,supplier,purchase_reff,sup_reff,value_in_PGk,open_stk,close_stk,vari,status,date,comments) values('" & TextBox1.Text & "' , '" & TextBox2.Text & "','" & TextBox3.Text & "','" & TextBox4.Text & "','" & TextBox5.Text & "','" & TextBox6.Text & "','" & TextBox7.Text & "','" & TextBox8.Text & "','" & TextBox9.Text & "','" & TextBox10.Text & "','" & TextBox12.Text & "' ,'" & TextBox13.Text & "','" & TextBox14.Text & "','" & TextBox15.Text & "','" & TextBox16.Text & "','" & TextBox17.Text & "','" & TextBox18.Text & "','" & TextBox19.Text & "','" & TextBox20.Text & "','" & TextBox11.Text & "')"
            command = New MySqlCommand(query, mysqlconn)
            reader = command.ExecuteReader
            MessageBox.Show("Data Saved")
            mysqlconn.Close()
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        Finally
            mysqlconn.Dispose()
        End Try
    End Sub
End Class