TreeList.NodeCellStyle Event

Allows you to customize the appearance of individual cells.

Namespace: DevExpress.XtraTreeList

Assembly: DevExpress.XtraTreeList.v23.2.dll

NuGet Packages: DevExpress.Win.Navigation, DevExpress.Win.TreeList

Declaration

C#

[DXCategory("Appearance")]
public event GetCustomNodeCellStyleEventHandler NodeCellStyle

VB.NET

<DXCategory("Appearance")>
Public Event NodeCellStyle As GetCustomNodeCellStyleEventHandler

Event Data

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

Property	Description
Appearance	Gets the appearance settings used to paint the cell currently being processed.
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.

Remarks

The NodeCellStyle event raises when a cell is about to be displayed. You can identify the cell by e.Node and e.Column event arguments. To customize appearance settings, use the e.Appearance property.

Read the following topic for information on appearance customization: Appearances.

Important

Do not change cell values, modify the control’s layout, or change the control’s object model in the events used for custom control painting. Actions that update the layout can cause the control to malfunction.

Tip

• Use the RefreshCell, RefreshNode, or LayoutChanged() method to raise the NodeCellStyle event in code when needed.
• Handle the TreeList.CustomDrawNodeCell event to completely redraw a cell.

Example

The following sample code handles the TreeList.NodeCellStyle event to modify the appearance of the “Budget“ column’s cells whose values are greater than 500,000.

C#

using DevExpress.XtraTreeList;

private void treeList1_NodeCellStyle(object sender, GetCustomNodeCellStyleEventArgs e) {
   // Modify the appearance settings used to paint the "Budget" column's cells
   // whose values are greater than 500,000.
   if (e.Column.FieldName != "Budget") return;
   if (Convert.ToInt32(e.Node.GetValue(e.Column.AbsoluteIndex)) > 500000) {
      e.Appearance.BackColor = Color.FromArgb(80, 255, 0, 255);
      e.Appearance.ForeColor = Color.White;
      e.Appearance.FontStyleDelta = FontStyle.Bold;
   }
}

VB.NET

Imports DevExpress.XtraTreeList

Sub TreeList1_NodeCellStyle(sender As Object, e As DevExpress.XtraTreeList.GetCustomNodeCellStyleEventArgs) Handles TreeList1.NodeCellStyle
   ' Modify the appearance settings used to paint the "Budget" column's cells
   ' whose values are greater than 500,000.
   If e.Column.FieldName <> "Budget" Exit Sub
   If Convert.ToInt32(e.Node.GetValue(BudgetColumnID)) > 500000 Then
      e.Appearance.BackColor = Color.FromArgb(80, 255, 0, 255)
      e.Appearance.ForeColor = Color.White
      e.Appearance.FontStyleDelta = FontStyle.Bold
   End If
End Sub