GanttControl.QueryItemTemplate Event

Allows you to assign HTML-CSS templates from the GanttControl.HtmlTemplates collection to UI elements of the required type.

Namespace : DevExpress.XtraGantt

Assembly : DevExpress.XtraGantt.v25.2.dll

NuGet Package : DevExpress.Win.Gantt

Declaration

C#
VB.NET

csharp

[DXCategory("Events")]
public event QueryItemTemplateEventHandler QueryItemTemplate

<DXCategory("Events")>
Public Event QueryItemTemplate As QueryItemTemplateEventHandler

Event Data

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

Property	Description
Item	Gets the information about the processed UI element (regular task, summary task, baseline, etc.).
ItemType	Gets a value that identifies the element type (regular task, summary task, baseline, etc.).
Template	Gets the HTML-CSS template.

Remarks

The code below assigns the “TaskTemplate” template to regular and summary tasks, “TaskProgressTemplate” to progress lines of regular and summary tasks, and “TaskTextLabelTemplate” to text labels.

C#
VB.NET

csharp

void GanttControl1_QueryItemTemplate(object sender, QueryItemTemplateEventArgs e) {
    switch(e.ItemType) {
        case GanttChartItemType.Task:
        case GanttChartItemType.SummaryTask:
            e.Template.Assign(TaskTemplate);
            break;
        case GanttChartItemType.Progress:
        case GanttChartItemType.SummaryTaskProgress:
            e.Template.Assign(TaskProgressTemplate);
            break;
        case GanttChartItemType.TextLabel:
            e.Template.Assign(TaskTextLabelTemplate);
            break;
    }
}

Private Sub GanttControl1_QueryItemTemplate(ByVal sender As Object, ByVal e As QueryItemTemplateEventArgs)
    Select Case e.ItemType
        Case GanttChartItemType.Task, GanttChartItemType.SummaryTask
            e.Template.Assign(TaskTemplate)
        Case GanttChartItemType.Progress, GanttChartItemType.SummaryTaskProgress
            e.Template.Assign(TaskProgressTemplate)
        Case GanttChartItemType.TextLabel
            e.Template.Assign(TaskTextLabelTemplate)
    End Select
End Sub

See this documentation article for more information: HTML Templates in Gantt Control.