GridControl.IsValidRowHandle(Int32) Method

Indicates whether the specified row handle is valid.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v19.1.dll

Declaration

C#

public bool IsValidRowHandle(
    int rowHandle
)

VB.NET

Public Function IsValidRowHandle(
    rowHandle As Integer
) As Boolean

Parameters

Name	Type	Description
rowHandle	Int32	An integer value that specifies the row’s handle.

Returns

Type	Description
Boolean	true if the specified row handle is valid; otherwise, false.

Remarks

An invalid row handle corresponds to a row which doesn’t exist in a View. Its handle is returned by the DataControlBase.InvalidRowHandle property. To learn more, see Identifying Rows and Cards.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the IsValidRowHandle(Int32) 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.

C#

how-to-preserve-the-dxgrid-for-wpf-view-state-e4222/CS/SaveWpfGridState/RowStateHelper.cs#L113

for (int i = -1; i > int.MinValue; i--) {
    if (!gridControl.IsValidRowHandle(i))
        break;

how-to-create-checkable-grouping-in-gridcontrol-t127563/CS/DevExpress.Example03/CheckableGroupBehavior.cs#L199

int groupRowHandle = grid.GetParentRowHandle(rowHandle);
if(grid.IsValidRowHandle(groupRowHandle) && grid.IsGroupRowHandle(groupRowHandle)) {
    bool? value = this.GetRowChildrenState(groupRowHandle);

how-to-emulate-binding-to-the-isexpanded-property-of-the-treelistnode-t127638/CS/DevExpress.Example04/BindableExpandingBehavior.cs#L99

bool isExpanded = (bool)obj.GetType().GetProperty(args.PropertyName).GetValue(obj, null);
if(this.AssociatedObject.IsValidRowHandle(rowHandle)) {
    node.IsExpanded = isExpanded;

VB.NET

how-to-preserve-the-dxgrid-for-wpf-view-state-e4222/VB/SaveWpfGridState/RowStateHelper.vb#L115

For i As Integer = -1 To Integer.MinValue + 1 Step -1
    If Not gridControl.IsValidRowHandle(i) Then
        Exit For

how-to-create-checkable-grouping-in-gridcontrol-t127563/VB/DevExpress.Example03/CheckableGroupBehavior.vb#L211

Dim groupRowHandle As Integer = grid.GetParentRowHandle(rowHandle)
If grid.IsValidRowHandle(groupRowHandle) AndAlso grid.IsGroupRowHandle(groupRowHandle) Then
    Dim value? As Boolean = Me.GetRowChildrenState(groupRowHandle)

how-to-emulate-binding-to-the-isexpanded-property-of-the-treelistnode-t127638/VB/DevExpress.Example04/BindableExpandingBehavior.vb#L101

Dim isExpanded As Boolean = CBool(obj.GetType().GetProperty(args.PropertyName).GetValue(obj, Nothing))
If Me.AssociatedObject.IsValidRowHandle(rowHandle) Then
    node.IsExpanded = isExpanded