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Hello, Marc,
Thank you for writing.
The ColumnChooserElement internally uses its own ColumnChooserItems to display the columns. These items are not supposed to be selected but draggable. That is why if you need to accomplish multiple columns to be dragged from the column chooser and dropped to the grid I would recommend you to create a separate form with a RadListView for example hosting the invisible columns as data items. By using the drag and drop service that both RadGridView and RadListView support you can implement the custom columns visibility logic. Thus, you will be able to hide columns from the grid when dragging a column from the grid to the list view and show this column in the other drag drop direction. Additional information for RadDragDropService and how to customize it is available in the following help articles:
https://docs.telerik.com/devtools/winforms/listview/drag-and-drop/listviewdragdropservice
https://docs.telerik.com/devtools/winforms/listview/drag-and-drop/drag-and-drop-using-raddragdropservice
I hope this information helps. Should you have further questions I would be glad to help.
Regards,
Dess
Progress Telerik
Thank you for writing.
The ColumnChooserElement internally uses its own ColumnChooserItems to display the columns. These items are not supposed to be selected but draggable. That is why if you need to accomplish multiple columns to be dragged from the column chooser and dropped to the grid I would recommend you to create a separate form with a RadListView for example hosting the invisible columns as data items. By using the drag and drop service that both RadGridView and RadListView support you can implement the custom columns visibility logic. Thus, you will be able to hide columns from the grid when dragging a column from the grid to the list view and show this column in the other drag drop direction. Additional information for RadDragDropService and how to customize it is available in the following help articles:
https://docs.telerik.com/devtools/winforms/listview/drag-and-drop/listviewdragdropservice
https://docs.telerik.com/devtools/winforms/listview/drag-and-drop/drag-and-drop-using-raddragdropservice
I hope this information helps. Should you have further questions I would be glad to help.
Regards,
Dess
Progress Telerik
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Marc
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answered on 25 Jan 2018, 03:59 PM
I'll try this. Thank you for your help.
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Marc
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answered on 26 Jan 2018, 02:56 PM
Hey Dess,
DragDrop from ListView to GridView works fine now.
But if I Drag a ColumnHeader to the ListView, I don't know how to get the information about the ColumnHeader.
Element is type of SimpleListViewVisualItem.
Don't know how to get the draged HeaderElement.
Kind regards
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Hello, Marc,
Thank you for writing back.
If you drag a column header from RadGridView to RadListView, the target element is supposed to be SimpleListViewVisualItem not the dragged item. The SimpleListViewVisualItem represents the visual item in RadListView. If you need to extract the data from the column header you should do it from the dragged instance. In the referred forum thread it is demonstrated how to handle the case when you drag a GridHeaderCellElement. You can access the dragged column by the GridHeaderCellElement.ColumnInfo property and thus get the information you need.
If you have any additional questions, please let me know.
Regards,
Dess
Progress Telerik
Thank you for writing back.
If you drag a column header from RadGridView to RadListView, the target element is supposed to be SimpleListViewVisualItem not the dragged item. The SimpleListViewVisualItem represents the visual item in RadListView. If you need to extract the data from the column header you should do it from the dragged instance. In the referred forum thread it is demonstrated how to handle the case when you drag a GridHeaderCellElement. You can access the dragged column by the GridHeaderCellElement.ColumnInfo property and thus get the information you need.
If you have any additional questions, please let me know.
Regards,
Dess
Progress Telerik
Try our brand new, jQuery-free Angular components built from ground-up which
deliver the business app essential building blocks - a grid component,
data visualization (charts) and form elements.