TreeList.CustomNodeCellEdit Event

Enables editors to be assigned to cells on an individual basis.

Namespace: DevExpress.XtraTreeList

Assembly: DevExpress.XtraTreeList.v20.1.dll

Declaration

[DXCategory("Editor")]
public event GetCustomNodeCellEditEventHandler CustomNodeCellEdit
<DXCategory("Editor")>
Public Event CustomNodeCellEdit As GetCustomNodeCellEditEventHandler

Event Data

The CustomNodeCellEdit event's data class is GetCustomNodeCellEditEventArgs. The following properties provide information specific to this event:

Property Description
Column Gets a column to which the cell processed by an event belongs. Inherited from CellEventArgs.
Node Gets the current Tree List node. Inherited from NodeEventArgs.
RepositoryItem Gets or sets the editor assigned to the processed cell.

Remarks

The CustomNodeCellEdit event fires for each cell within the Tree List. The event parameter's properties allow the column and node to which the current cell belongs to be identified. The cell's in-place editor is represented by the GetCustomNodeCellEditEventArgs.RepositoryItem property. Note that repository items must be added to the repository.

The editor's repository can be accessed via the Tree List's EditorContainer.RepositoryItems property.

By default, the editor assigned to a cell via the TreeListColumn.ColumnEdit property or the CustomNodeCellEdit event will be also used for editing the cell's contents. If you want to use a different editor for in-place editing, handle the TreeList.CustomNodeCellEditForEditing event.

See Inplace Editors to learn more.

Special notes:

  • The CustomNodeCellEdit event fires whenever a cell is updated. For that reason, this event fires relatively frequently. Do not update Tree List visual elements or implement complex logic for the event handler as it can severely impact application performance.

  • The CustomRowCellEdit event is designed to assign ready-to-use editors to individual data cells. Do not modify properties of any existing Repository Items (including "e.RepositoryItem" objects) on this event.

Examples

The following sample code handles the TreeList.CustomNodeCellEdit event to assign different in-place editors (repository items) to cells. It's assumed that these editors have already been added to the Tree List's repository.

The image below shows the result.

cdInplaceEditors

using DevExpress.XtraTreeList;

private void treeList1_GetCustomNodeCellEdit(object sender, DevExpress.XtraTreeList.GetCustomNodeCellEditEventArgs e) {
    if(e.Column.FieldName != "Category") {
        object obj = e.Node.GetValue(0);
        if(obj != null) {
            switch(obj.ToString()) {
                case "Category":
                    e.RepositoryItem = repositoryImageComboBox1;
                    break;
                case "Supplier":
                    e.RepositoryItem = repositoryItemComboBox1;
                    break;
                case "Unit Price":
                    e.RepositoryItem = repositoryItemCalcEdit1;
                    break;
                case "Units in Stock":
                    e.RepositoryItem = repositoryItemSpinEdit1;
                    break;
                case "Discontinued":
                    e.RepositoryItem = repositoryItemCheckEdit1;
                    break;
                case "Last Order":
                    e.RepositoryItem = repositoryItemDateEdit1;
                    break;
                case "Relevance":
                    e.RepositoryItem = repositoryItemProgressBar1;
                    break;
                case "Phone":
                    e.RepositoryItem = repositoryItemTextEdit1;
                    break;
            }
        }
    }
}
See Also