TreeList.QueryNodeTemplate Event

Allows you to assign HTML-CSS templates from the HtmlTemplates collection to nodes.

Namespace: DevExpress.XtraTreeList

Assembly: DevExpress.XtraTreeList.v23.2.dll

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

Declaration

C#

[DXCategory("Events")]
public event QueryNodeHtmlTemplateEventHandler QueryNodeTemplate

VB.NET

<DXCategory("Events")>
Public Event QueryNodeTemplate As QueryNodeHtmlTemplateEventHandler

Event Data

The QueryNodeTemplate event's data class is DevExpress.XtraTreeList.QueryNodeTemplateEventArgs.

Remarks

Handle the QueryNodeTemplate event to apply a template from the HtmlTemplates collection based on a condition.

C#

using DevExpress.XtraTreeList;
using DevExpress.HTML.Demos.Modules.TreeList;

// ...
EditingComment editingComment;

private void treeList1_QueryNodeTemplate(object sender, QueryNodeTemplateEventArgs e) {
    var comment = treeList1.GetRow(e.Node.Id);
    if(editingComment != null && editingComment.Comment == comment) {
        if(editingComment.Mode == CommentEditingMode.Editing)
            e.Template.Assign(editCommentTemplate);
        else
            e.Template.Assign(replyCommentTemplate);
    }
}

VB.NET

Imports DevExpress.XtraTreeList
Imports DevExpress.HTML.Demos.Modules.TreeList

' ...
Dim editingComment As EditingComment

Private Sub treeList1_QueryNodeTemplate(ByVal sender As Object, ByVal e As QueryNodeTemplateEventArgs)
    Dim comment = treeList1.GetRow(e.Node.Id)
    If editingComment IsNot Nothing AndAlso editingComment.Comment Is comment Then
        If editingComment.Mode = CommentEditingMode.Editing Then
            e.Template.Assign(editCommentTemplate)
        Else
            e.Template.Assign(replyCommentTemplate)
        End If
    End If
End Sub

Run Demo: HTML/CSS Templates in TreeList

The NodeHtmlTemplate property specifies the default HTML-CSS template for nodes.