Question

NET WinForms.

VB code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)       Handles Button1.Click

    Label1.Text = "Beginning"

    Dim a As Integer = 20
    Dim b As Integer = 3
    Do Until b > a

        a & " " & b

        a = a - 2
        b = b + 1
    Loop
    Label2.Text = "End"
End Sub

I want to display the result of this row a & ” ” & b in GridView.
How should I change the code to make this work properly?

Answer 1

I would recommend you store the value into DataTable and bind into the DataGridView

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)       Handles Button1.Click

    Label1.Text = "Beginning"

    'Create a new datatable here
    Dim dt As New DataTable
    dt.Columns.Add("Result")


    Dim a As Integer = 20
    Dim b As Integer = 3
    Do Until b > a

        'Create DataRow here and put the value into DataRow
        Dim dr As DataRow = dt.NewRow
        dr("result") = a.ToString & " " & b.ToString
        'a & " " & b
        dt.Rows.Add(dr)

        a = a - 2
        b = b + 1
    Loop

    'Bind your dt into the GridView
    DataGridView.DataSource = dt

    Label2.Text = "End"

End Sub