Skip to main content

DevExpress v24.2 Update — Your Feedback Matters

Our What's New in v24.2 webpage includes product-specific surveys. Your response to our survey questions will help us measure product satisfaction for features released in this major update and help us refine our plans for our next major release.

Take the survey Not interested

DiagramControl.ItemInitializing Event

Fires each time an item is created via the DevExpress.Diagram.Core.ItemTool.

Namespace: DevExpress.XtraDiagram

Assembly: DevExpress.XtraDiagram.v24.2.dll

NuGet Package: DevExpress.Win.Diagram

#Declaration

[DiagramCategory(DiagramCategory.DiagramItems)]
public event EventHandler<DiagramItemInitializingEventArgs> ItemInitializing

#Event Data

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

Property Description
Item Returns the diagram item that is being initialized.
ItemUsage Indicates whether the item is a part of the diagram or toolbox preview.

#Remarks

The event parameter’s DiagramItemInitializingEventArgs.ItemUsage property indicates whether the item has been created in the diagram or toolbox preview.

See the example below.

void Diagram_ItemInitializing(object sender, DiagramItemInitializingEventArgs e) {
            if ((e.Item is DiagramConnector) && (e.ItemUsage == DevExpress.Diagram.Core.ItemUsage.Diagram)) {
                (e.Item as DiagramConnector).Type = DevExpress.Diagram.Core.ConnectorType.Straight;
                e.Item.ThemeStyleId = (e.Item as DiagramConnector).BeginItem.ThemeStyleId;
                e.Item.StrokeId = (e.Item as DiagramConnector).BeginItem.ForegroundId;
                e.Item.Appearance.Options.UseBorderSize = true;
                e.Item.Appearance.BorderSize = 3;
            }
        }
See Also