TreeListSettingsBehavior.SortMode Property
Gets or sets how the column’s data is sorted when sorting is applied to it.
Namespace: DevExpress.Web.ASPxTreeList
Assembly: DevExpress.Web.ASPxTreeList.v23.2.dll
NuGet Package: DevExpress.Web
Declaration
[DefaultValue(TreeListColumnSortMode.Default)]
public TreeListColumnSortMode SortMode { get; set; }Property Value
| Type | Default | Description |
|---|---|---|
| TreeListColumnSortMode | Default | One of the TreeListColumnSortMode enumeration values. |
Available values:
| Name | Description |
|---|---|
| Default | If a column’s TreeListDataColumn.SortMode property is set to default, the column’s data will be sorted according to the |
| Value | Sorts the column’s data by the column’s edit values (these are synchronized with the bound data source’s values). |
| DisplayText | Sorts the column’s data by the column’s display text (the strings displayed within the column’s cells). |
Property Paths
You can access this nested property as listed below:
| Object Type | Path to SortMode |
|---|---|
| ASPxTreeList |
|
Remarks
The SortMode property specifies the algorithm used to sort the column’s data (by display text or edit value).
Example
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.
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;
}