Esempio n. 1
0
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            if (provider != null && context != null)
            {
                IWindowsFormsEditorService service = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
                if (service == null || context.Instance == null)
                {
                    return(value);
                }
                IDataGrid eg = context.Instance as IDataGrid;
                DataGridViewColumnCollection cols;
                if (eg != null)
                {
                    DlgEditColumns dlgCols = new DlgEditColumns();
                    cols = value as DataGridViewColumnCollection;
                    if (cols == null)
                    {
                        cols = new DataGridViewColumnCollection((DataGridView)eg);
                    }
                    dlgCols.LoadData(cols);
                    eg.DisableColumnChangeNotification = true;
                    if (service.ShowDialog(dlgCols) == DialogResult.OK)
                    {
                        value = cols;
                        eg.OnChangeColumns(cols);
                    }
                    eg.DisableColumnChangeNotification = false;
                }

                {
                    IDesignerHost host = (IDesignerHost)provider.GetService(typeof(IDesignerHost));
                    if (host == null)
                    {
                        IComponent ic = context.Instance as IComponent;
                        if (ic != null && ic.Site != null)
                        {
                            host = ic.Site.GetService(typeof(IDesignerHost)) as IDesignerHost;
                        }
                    }
                    if (host == null)
                    {
                        return(value);
                    }
                    if (dataGridViewColumnCollectionDialog == null)
                    {
                        dataGridViewColumnCollectionDialog = CreateColumnCollectionDialog(provider, value as DataGridViewColumnCollection, context.Instance as DataGridView);
                    }
                    if (dataGridViewColumnCollectionDialog == null)
                    {
                        return(value);
                    }
                    //Unfortunately we had to make property which returns inner datagridview
                    //to access it here because we need to pass DataGridView into SetLiveDataGridView () method
                    DataGridView grid = context.Instance as DataGridView;
                    //we have to set Site property because it will be accessed inside SetLiveDataGridView () method
                    //and by default it's usually null, so if we do not set it here, we will get exception inside SetLiveDataGridView ()
                    //var oldSite = grid.Site;
                    //grid.Site = ((UserControl) context.Instance).Site;
                    //execute SetLiveDataGridView () via reflection
                    SetLiveDataGridView(dataGridViewColumnCollectionDialog, grid);
                    using (DesignerTransaction transaction = host.CreateTransaction("DataGridViewColumnCollectionTransaction"))
                    {
                        if (service.ShowDialog(dataGridViewColumnCollectionDialog) == DialogResult.OK)
                        {
                            transaction.Commit();
                            if (eg != null)
                            {
                                cols = value as DataGridViewColumnCollection;
                                eg.OnChangeColumns(cols);
                                IDevClass dc = eg.GetDevClass();
                                if (dc != null)
                                {
                                    dc.NotifyChange(eg, context.PropertyDescriptor.Name);
                                }
                            }
                        }
                        else
                        {
                            transaction.Cancel();
                        }
                    }
                }
            }
            return(value);
        }