TreeListColumnDisplayTextEventArgs Class

Provides data for the ASPxTreeList.CustomColumnDisplayText event.

Namespace: DevExpress.Web.ASPxTreeList

Assembly: DevExpress.Web.ASPxTreeList.v19.2.dll

Declaration

public class TreeListColumnDisplayTextEventArgs :
    EventArgs
Public Class TreeListColumnDisplayTextEventArgs
    Inherits EventArgs

Examples

The following example illustrates the use of the TreeListSettingsBehavior.SortMode property.

In this example, according to the specified sorting mode (the "Sort by Display Text" check box), TreeList's column data is hierarchically sorted. It means that TreeList's nodes and their subnodes are sorted separately. For demonstration purposes, each node level is colored with an appropriate color.

ASPxTreeList-SortMode

protected void Page_Load(object sender, EventArgs e)
{
    TreeList.SettingsBehavior.SortMode = cbSortByDisplayText.Checked ? ColumnSortMode.DisplayText : ColumnSortMode.Value;
    TreeList.DataSource = GetItems();
    TreeList.DataBind();
}

public List<NodeItem> GetItems()
{
    return new List<NodeItem>() {
        new NodeItem(1, 0, 2),
            new NodeItem(2, 1, 3),
            new NodeItem(3, 1, 1),
            new NodeItem(4, 1, 4),
            new NodeItem(5, 1, 2),
            new NodeItem(6, 1, 3),
                new NodeItem(7, 3, 3),
                new NodeItem(8, 3, 6),
                new NodeItem(9, 3, 5),
        new NodeItem(10, 0, 4),
        new NodeItem(11, 0, 3)
    };
}
public class NodeItem
{
    public NodeItem(int id, int parentID, int categoryID)
    {
        ID = id;
        ParentID = parentID;
        CategoryID = categoryID;
    }
    public int ID { get; set; }
    public int ParentID { get; set; }
    public int CategoryID { get; set; }
}

Dictionary<int, Color> colors = new Dictionary<int, Color>() {
    { 0, Color.LightCoral },
    { 1, Color.LightCyan },
    { 3, Color.LightGreen },
};

protected void TreeList_HtmlRowPrepared(object sender, DevExpress.Web.ASPxTreeList.TreeListHtmlRowEventArgs e)
{
    e.Row.BackColor = colors[Convert.ToInt32(e.GetValue(TreeList.ParentFieldName))];
}
protected void TreeList_CustomColumnDisplayText(object sender, DevExpress.Web.ASPxTreeList.TreeListColumnDisplayTextEventArgs e)
{
    if (e.Column.FieldName == "ID")
        e.DisplayText = Convert.ToInt32(e.Value) % 2 == 0 ? "DisplayText=Text1;   value=" + e.Value : "DisplayText=Text2;   value=" + e.Value;        
}

Inheritance

Object
EventArgs
TreeListColumnDisplayTextEventArgs
See Also