GridView.ExpandMasterRow(Int32) Method

Expands the specified master row.

Namespace: DevExpress.XtraGrid.Views.Grid

Assembly: DevExpress.XtraGrid.v18.2.dll

Declaration

C#

public void ExpandMasterRow(
    int rowHandle
)

VB.NET

Public Sub ExpandMasterRow(
    rowHandle As Integer
)

Parameters

Name	Type	Description
rowHandle	Int32	An integer value identifying the master row by its handle.

Remarks

The ExpandMasterRow method can be used as an alternative to the GridView.SetMasterRowExpanded method, which requires an additional parameter specifying how the row’s expanded state should be changed.

The GridOptionsDetail.AllowExpandEmptyDetails option controls whether empty details can be expanded. If this option is set to false and the default detail is empty, the ExpandMasterRow method will not expand this detail. Instead, the first non-empty detail will be expanded.

Before a master row is expanded, the GridView.MasterRowExpanding event is raised. If the event handler prohibits expanding the row, the ExpandMasterRow method does nothing. If the row is successfully expanded, the GridView.MasterRowExpanded event is raised.

Please refer to the Master-Detail Relationships topic, for additional information.

Note

Detail pattern Views do not contain data and they are never displayed within XtraGrid. So, the ExpandMasterRow member must not be invoked for these Views. The ExpandMasterRow member can only be used with real Views that are displayed within the Grid Control. The real Views with which an end-user interacts at runtime can be accessed using the following methods.

• GridControl.MainView - returns the top most View in a grid;
• GridControl.FocusedView - returns the focused View;
• GridControl.DefaultView - returns the currently maximized View;
• the sender parameter of View specific events;
• GridView.GetDetailView - returns a detail clone View for a specific master row.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the ExpandMasterRow(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-display-only-rows-with-non-empty-details-e465/CS/WindowsApplication28/Form1.cs#L30

    for (int i = 0; i < gridView1.DataRowCount; i++)
        gridView1.ExpandMasterRow(i);
}

how-to-edit-all-the-records-in-the-detail-view-when-a-master-rows-value-is-changed-e624/CS/Form1.cs#L143

{
    gridView1.ExpandMasterRow(rowHandle);
    dView = gridView1.GetDetailView(rowHandle, 0) as GridView;

how-to-manage-the-expanded-rows-collection-when-the-master-detail-functionality-is-used-t470064/CS/View/CategoryView.cs#L162

{
    view.ExpandMasterRow(GetRowHandle(categoryID));
}

VB.NET

how-to-display-only-rows-with-non-empty-details-e465/VB/WindowsApplication28/Form1.vb#L28

For i As Integer = 0 To gridView1.DataRowCount - 1
    gridView1.ExpandMasterRow(i)
Next i

how-to-edit-all-the-records-in-the-detail-view-when-a-master-rows-value-is-changed-e624/VB/Form1.vb#L137

If dView Is Nothing Then
    gridView1.ExpandMasterRow(rowHandle)
    dView = TryCast(gridView1.GetDetailView(rowHandle, 0), GridView)

how-to-manage-the-expanded-rows-collection-when-the-master-detail-functionality-is-used-t470064/VB/View/CategoryView.vb#L154

Private Sub ExpandMasterRow(ByVal categoryID As Integer)
    view.ExpandMasterRow(GetRowHandle(categoryID))
End Sub