windowsforms-devexpress-dot-xtratreelist-dot-nodes-dot-treelistnode-dot-getvalue-x28-system-dot-object-x29.md
Returns the value for a specific column, or null if no column with such columnID was found.
Namespace : DevExpress.XtraTreeList.Nodes
Assembly : DevExpress.XtraTreeList.v25.2.dll
NuGet Packages : DevExpress.Win.Navigation, DevExpress.Win.TreeList
public virtual object GetValue(
object columnID
)
Public Overridable Function GetValue(
columnID As Object
) As Object
| Name | Type | Description |
|---|---|---|
| columnID | Object |
An object that identifies a column (a TreeListColumn object, field name, column’s absolute index or corresponding DataColumn object).
|
| Type | Description |
|---|---|
| Object |
The value of a specific column.
|
The following objects and values can be passed as column identifiers:
The following example iterates through root nodes of the Tree List and changes the “Budget” column value for the “Sales and Marketing” department.TreeListColumn instances are used as column identifiers in the TreeListNode.GetDisplayText, TreeListNode.GetValue and TreeListNode.SetValue methods.
IEnumerator en = treeList1.Nodes.GetEnumerator();
TreeListColumn columnDep = treeList1.Columns["Department"];
TreeListColumn columnBudget = treeList1.Columns["Budget"];
while (en.MoveNext()) {
TreeListNode childNode = (TreeListNode)en.Current;
if(childNode.GetDisplayText(columnDep) == "Sales and Marketing") {
decimal newBudget = (decimal)childNode.GetValue(columnBudget) / 2;
childNode.SetValue(columnBudget, newBudget);
}
}
Dim en As IEnumerator = TreeList1.Nodes.GetEnumerator()
Dim ColumnDep As TreeListColumn = TreeList1.Columns("Department")
Dim ColumnBudget As TreeListColumn = TreeList1.Columns("Budget")
While en.MoveNext() = True
Dim ChildNode As TreeListNode = CType(en.Current, TreeListNode)
If ChildNode.GetDisplayText(ColumnDep) = "Sales and Marketing" Then
Dim NewBudget As Decimal = CType(ChildNode.GetValue(ColumnBudget), Decimal) / 2
ChildNode.SetValue(ColumnBudget, NewBudget)
End If
End While
The following code snippets (auto-collected from DevExpress Examples) contain references to the GetValue(Object) method.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
winforms-treelist-save-restore-expanded-state-of-nodes/CS/TreeListViewState.cs#L35
foreach(TreeListNode node in TreeList.Selection)
al.Add(node.GetValue(TreeList.KeyFieldName));
return al;
winforms-treelist-sync-position-of-nodes-with-data-records/CS/Q351285/Form1.cs#L51
UpdateNodesPositions(n.Nodes);
n.TreeList.SetNodeIndex(n, Convert.ToInt32(n.GetValue("Order")));
}
winforms-treelist-save-restore-expanded-state-of-nodes/VB/TreeListViewState.vb#L38
For Each node As TreeListNode In TreeList.Selection
al.Add(node.GetValue(TreeList.KeyFieldName))
Next node
winforms-treelist-sync-position-of-nodes-with-data-records/VB/Q351285/Form1.vb#L63
UpdateNodesPositions(n.Nodes)
n.TreeList.SetNodeIndex(n, Convert.ToInt32(n.GetValue("Order")))
Next
See Also