How to update the CRUD operations in database in WinForms GridGroupingControl?

//Event Subscription
this.gridGroupingControl1.SourceListRecordChanged += gridGroupingControl1_SourceListRecordChanged;
 
//Event Customization
void gridGroupingControl1_SourceListRecordChanged(object sender, Syncfusion.Grouping.RecordChangedEventArgs e)
{
    //To update database for addition.
    if (e.Action == Syncfusion.Grouping.RecordChangedType.Added)
    {
        String column1Value = e.Record.GetValue("id").ToString();
        string column2Value = e.Record.GetValue("desc").ToString();
        string txtSQLQuery = "insert into  mains ([id],[desc]) values ('" + column1Value + "','" + column2Value + "')";
        ExecuteQuery(txtSQLQuery);
    }
    //Update db for Deletion.
    if (e.Action == Syncfusion.Grouping.RecordChangedType.Removed)
    {
        String value = e.Record.GetValue("id").ToString();
        string txtSQLQuery = "delete from  mains where id =" + value;
 
        ExecuteQuery(txtSQLQuery);
    }
    //Update the db when modify the cell value.
    if (e.Record.Kind == Syncfusion.Grouping.DisplayElementKind.AddNewRecord)
        return;
    String columnName = e.Record.GetValue("id").ToString();
    Object val = e.Record.GetValue(columnName);
    object unique = e.Record.GetValue("id");
    if (val == null || unique == null)
        return;
    string value1 = val.ToString();
 
    string txtSQLQuery1 = "update  mains set  " + columnName + " =\"" + value1 + "\" where id =" + unique.ToString();
    ExecuteQuery(txtSQLQuery1);
}

'Event Subscription
AddHandler Me.gridGroupingControl1.SourceListRecordChanged, AddressOf gridGroupingControl1_SourceListRecordChanged
 
'Event Customization
Private Sub gridGroupingControl1_SourceListRecordChanged(ByVal sender As Object, ByVal e As Syncfusion.Grouping.RecordChangedEventArgs)
    'Update db when adding records.
    If e.Action = Syncfusion.Grouping.RecordChangedType.Added Then
        Dim column1Value As String = e.Record.GetValue("id").ToString()
        Dim column2Value As String = e.Record.GetValue("desc").ToString()
        ExecuteQuery("insert into  mains ([id],[desc]) values ('" & column1Value & "','" & column2Value & "')")
    End If
    'Update db for Deletion.
    If e.Action = Syncfusion.Grouping.RecordChangedType.Removed Then
        Dim value1 As String = e.Record.GetValue("id").ToString()
        Dim txtSQLQuery1 As String = "delete from  mains where id =" & value1
 
        ExecuteQuery(txtSQLQuery1)
    End If
    'Update the db when modify the cell value.
    If e.Record.Kind = Syncfusion.Grouping.DisplayElementKind.AddNewRecord Then
        Return
    End If
    Dim columnName As String = e.Record.GetValue("id").ToString()
    Dim val As Object = e.Record.GetValue(columnName)
    Dim unique As Object = e.Record.GetValue("id")
    If val Is Nothing OrElse unique Is Nothing Then
        Return
    End If
    Dim value As String = val.ToString()
 
    Dim txtSQLQuery As String = "update  mains set  " & columnName & " =""" & value & """ where id =" & unique.ToString()
    ExecuteQuery(txtSQLQuery)
End Sub