Row deleting

TreeGrid documentation

When a user deletes row, the row is not physically removed. The deleted row is marked as Deleted and is hidden or colored red depending on ShowDeleted.
The deleted row can be still undeleted, by a user if it is visible or by API.
After the changes are uploaded to server and server accepts the changes, the deleted row is physically removed from grid and its data.
If rows can be deleted from grid.
If set to 0, it disables Panel Delete button, the deleting actions and DeleteRow method. The DeleteRowT and RemoveRow are still working.
If deleted rows and columns are visible and colored.
If set to 1, deleted rows and columns are still visible and can be undeleted. The deleted rows are colored in red, it can be changed in Grid.css.
If set to 0, deleted rows and columns are hidden and cannot be undeleted by a user.
Setting to 1 when AutoUpdate is true has no effect - the rows are immediately deleted.
If the confirmation message for deleting row, selected rows, column and selected columns will be shown.
0 - never, 1 - only if ShowDeleted is on, 2 always.
If the row can be deleted.
By default variable rows can be deleted and fixed rows cannot. Deleting fixed rows is not good idea, fixed rows cannot be added.
Deprecated since 12.0. Use Panel Buttons or Panel value instead to define the panel buttons for header row.
If the Panel DeleteAll button is enabled. Header row itself can never be deleted.
It is set to 1 when the row has been deleted.
The row is hidden if ShowDeleted='0' or visible and colored red (by default setting in Grid.css) when ShowDeleted='1'.
If the row is shown, it can be undeleted. Child row of deleted parent cannot be undeleted.
When user deletes row, all its children are automatically deleted to. When user undeletes the parent, all its children are undeleted too, except they were deleted directly.
In API, deleted children due its parent deletion has Deleted='2'.
The deleted row is ignored in summary calculations. The deleted row cannot be moved and does not accept children by dragging or adding.
After uploading changes to server or calling AcceptChanges the deleted row is physically removed from grid.
If the default Panel button Delete is visible. This button is hidden also if <Cfg Deleting="0"/>. This button is inactive when the row has CanDelete='0'.
Click to this button deletes row or undeletes deleted row.
Used only if the Panel Buttons and the cell value are not set.
Called before the row is deleted. Called after the row is marked as Deleted, but before it is hidden or colored.
Fires for every row being deleted, even for deleted children of deleted parent. First are deleted children and after them the parent.
type = 1 delete row, 2 delete row because its parent is deleted.
If row is removed by RemoveRow ( ), event is not fired!
Called before the row is undeleted. Called after the row has cleared its Deleted attribute, but before it is shown or colored.
Fires for every row being undeleted, even for undeleted children of undeleted parent. First are undeleted children and after them the parent.
Called before row is deleted or undeleted. Called to find out if and how can the row be deleted or undeleted. It is not called for its children.
type = 0 - cannot delete, 1 - user must confirm deleting, 2 - delete, 3 - undelete.
Return new type. Or return the type to not change the behavior. Returning 2 for deleted row and 3 for not deleted row has no effect.
If fires when deleting selected rows, type = 1 has no meaning.
(Since 11.0) rows are set if called on deleting selected rows and contain all the selected rows to delete or undelete. For every of these rows is called the OnCanRowDelete.
Called before all selected rows are deleted or undeleted. Return true to suppress the action.
type = 0 undelete, 1 delete, 2 remove.
Remember, this event can be called more times, depending on Actions settings for event ClickHeaderDelete.
Deletes / undeletes row from grid. Displays changes. Prepares deleting and calls DeleteRowT ( ).
type = 1 - delete + confirm dialog, 2 - delete, 3 - undelete.
Deletes or undeletes row with its children. Only marks rows as deleted.
Returns true if the deletion was done.
(Since 12.0) If set test = 1, does not delete row, only tests if it is possible, but does not show confirm message, takes it as confirmed.
Deletes / undeletes row from grid. Displays changes. type = 2 - delete, 3 - undelete.
Deletes or undeletes row with its children.
Physically removes the row from grid and data. The row is really deleted, not just marked! For marking row as Deleted use DeleteRow() instead.
Deleted rows are not in output data, thus server cannot see which rows were deleted (only by comparing with original data).
Only variable row can be removed.
Remember, removed row cannot be used in any API function, especially take care in loops, you cannot use GetNext / GetPrev functions with removed row.
Deletes (del = 1), or undeletes (del = 0) or removes (del = 2) all given rows in grid.
Returns final count of affected rows.
Deletes actual or focused row, the row is marked as Deleted. Undeletes actual or focused row.
It is used only if the deleted rows are visible (<Cfg ShowDeleted='1'/>).
To invert deletion use action setting "DeleteRow OR UndeleteRow".
Physically removes the actual or focused row. The row will no longer exist in grid and cannot be updated to server!
Deletes all focused rows, the rows are marked as Deleted. Without ...F fails if the actual row is not focused.
This action can be asynchronous!
Undeletes all focused rows. Without ...F fails is the actual row if not focused.
This action can be asynchronous!
Physically removes all focused rows. The rows will no longer exist in grid and cannot be updated to server! Without ...F fails if the actual row is not focused.
This action can be asynchronous!
Deletes all selected rows. It fails if there is no selected row or all selected rows are deleted. (Since 12.0) Without ...F fails if the actual row is not selected.
This action can be asynchronous!
Undeletes all selected rows. It fails if there is no selected deleted row. (Since 12.0) Without ...F fails if the actual row is not selected.
It is used only if the deleted rows are visible (<Cfg ShowDeleted='1'/>).
To invert deletion use "UndeleteSelected OR DeleteSelected" - remember, here it depends on the order!
This action can be asynchronous!
Physically removes all selected rows. The rows will no longer exist in grid and cannot be updated to server! (Since 12.0) Without ...F fails if the actual row is not selected.
This action can be asynchronous!