Using a combobox to query the database

Question

I have all the days of the week in a combobox, yet when selecting a day all the days are shown in my data grid... How can I use the one selected value from the combobox to searc

Answer 1

You can Simply make a filter in your datagridview using following code

Dim column As String = 'Your weekday column Name in Datagridview
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged

    Dim rows = ds.Tables(0).Select("Convert(" & column & ", 'System.String') LIKE '*" + ComboBox1.SelectedItem + "*'")

    Try
        DGTimeTable.DataSource = rows.CopyToDataTable
    Catch ex As Exception
    End Try
End Sub

Answer 2

you are passing cbDay as a string, try changing this line

Dim SqlQuery As String = "SELECT Time, Activity, Equipment FROM TimeTable WHERE Day = cbDay"

to something like this

Dim SqlQuery As String = String.Format("SELECT Time, Activity, Equipment FROM TimeTable WHERE Day = {0}", cbDay.Text)