Wsrtjtyk

I have table with two columns : "Total" and "Returned" I am trying to take all column values from both but it not work with me. It takes only the first row in the column I want total values in the column

My code :

 Private Sub TotalTextBox_TextChanged(sender As Object, e As EventArgs) Handles TotalTextBox.TextChanged

    Dim str As String = "Server=localhost;Port=3306;Database=testdb;Uid=root;Pwd=password"



    Using net As New MySqlConnection(str)



        Dim totalnet As String = "Select * from testata where Qty_Returned and Total" 



        Dim cm As New MySqlCommand(totalnet, net)



        net.Open()

        Dim rdnet As MySqlDataReader = cm.ExecuteReader()



        If rdnet.Read() Then

            Label16.Text = rdnet.GetString(12) - rdnet.GetString(11)

        Else



        End If

    End Using



End Sub

Glad you got it working. Just a few suggestions...
Turn on Option Strict for this and all your code.
Comments are inline.

Private Sub testdataDataGridView_DataBindingComplete(sender As Object, e As DataGridViewBindingCompleteEventArgs) Handles testataDataGridView.DataBindingComplete

        'A Using...End Using block will ensure that your objects that use unmanages 

        'resources are closed and disposed event if there is an error in the code

        Using con As New MySqlConnection("Server=localhost;Port=3306;Database=testdb;   Uid=root;Pwd=1234")

            'A command object constructor can take an query string and connection as arguments

            Using cmd As New MySqlCommand("select sum(Qty_Returned) FROM testdata", con)

                'Open the connection at the last possible minute

                con.Open()

                Dim sqlresult = cmd.ExecuteScalar

                Label16.Text = sqlresult.ToString

            End Using

            Using cmg As New MySqlCommand("select sum(Total) FROM testgdata", con)

                Dim sqlresult2 = cmg.ExecuteScalar

                Label10.Text = sqlresult2.ToString

            End Using

        End Using

        Label18.Text = (CInt(La

End Sub

Not sure why this code is in this event.

I got the solution with this code:

 Private Sub testdataDataGridView_DataBindingComplete(sender As Object, e As     DataGridViewBindingCompleteEventArgs) Handles testataDataGridView.DataBindingComplete

    Dim con As New MySqlConnection("Server=localhost;Port=3306;Database=testdb;   Uid=root;Pwd=1234")



    Dim cmd As New MySqlCommand

    Dim cmg As New MySqlCommand



    con.Open()

    cmd.Connection = con

    cmd.CommandText = "select sum(Qty_Returned) FROM testdata"

    Dim sqlresult As Object

    sqlresult = cmd.ExecuteScalar

    Dim str1 As String

    str1 = sqlresult

    Label16.Text = str1

    cmg.Connection = con

    cmg.CommandText = "select sum(Total) FROM testgdata"

    Dim sqlresult2 As Object

    sqlresult2 = cmg.ExecuteScalar

    Dim str2 As String

    str2 = sqlresult2

    Label10.Text = str2



    Label18.Text = Label10.Text - Label16.Text

End Sub