windowsforms-devexpress-dot-xtragrid-dot-views-dot-grid-dot-gridview-dot-setmasterrowexpanded-x28-system-dot-int32-system-dot-boolean-x29.md
Expands or collapses the specified master row.
Namespace : DevExpress.XtraGrid.Views.Grid
Assembly : DevExpress.XtraGrid.v25.2.dll
NuGet Packages : DevExpress.Win.Grid, DevExpress.Win.Navigation
public void SetMasterRowExpanded(
int rowHandle,
bool expand
)
Public Sub SetMasterRowExpanded(
rowHandle As Integer,
expand As Boolean
)
| Name | Type | Description |
|---|---|---|
| rowHandle | Int32 |
An integer value identifying the master row by its handle.
| | expand | Boolean |
true to expand the specified row; false to collapse it.
|
If the expand parameter is set to true , the method expands the row making the default detail visible. The default detail is identified by the GridView.DefaultRelationIndex property value. Note that if the master row is already expanded, the method does nothing (it will not switch to the default detail if another detail is already visible). If you need to make a different detail visible, use the GridView.SetMasterRowExpandedEx method instead.
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 SetMasterRowExpanded method will not expand this detail. Instead, the first non-empty detail will be expanded.
If the expand parameter is set to false , the method collapses the master row destroying all details. Note that the GridView.CollapseMasterRow method can be used for the same purpose.
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 SetMasterRowExpanded member must not be invoked for these Views. The SetMasterRowExpanded member can only be used with Views that display real data within the Grid Control. Use the following methods to access these Views with which an end user interacts at runtime.
The following code snippets (auto-collected from DevExpress Examples) contain references to the SetMasterRowExpanded(Int32, Boolean) 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-grid-vertically-align-detail-views/CS/DetailsUnderEachOther/Form1.cs#L34
gridControl1.ForceInitialize();
gvMaster.SetMasterRowExpanded(0, true);
GridView gridRelations = (GridView)gvMaster.GetDetailView(0, 0);
winforms-grid-auto-expand-new-master-row/CS/Q205071/Form1.cs#L47
view.MasterRowExpanded += new CustomMasterRowEventHandler(OnGridViewMasterRowExpanded);
view.SetMasterRowExpanded(view.GetRowHandle(((IList)view.DataSource).Count - 1), true);
}
winforms-preserve-grid-state-on-refresh/CS/RefreshHelperClass.cs#L167
int rowHandle = view.LocateByValue(0, column, list[i]);
view.SetMasterRowExpanded(rowHandle, true);
}
winforms-grid-vertically-align-detail-views/VB/DetailsUnderEachOther/Form1.vb#L36
gridControl1.ForceInitialize()
gvMaster.SetMasterRowExpanded(0, True)
Dim gridRelations As GridView = CType(gvMaster.GetDetailView(0, 0), GridView)
winforms-grid-auto-expand-new-master-row/VB/Q205071/Form1.vb#L49
AddHandler view.MasterRowExpanded, New CustomMasterRowEventHandler(AddressOf OnGridViewMasterRowExpanded)
view.SetMasterRowExpanded(view.GetRowHandle(CType(view.DataSource, IList).Count - 1), True)
End Sub
winforms-preserve-grid-state-on-refresh/VB/RefreshHelperClass.vb#L176
Dim rowHandle As Integer = view.LocateByValue(0, column, list(i))
view.SetMasterRowExpanded(rowHandle, True)
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See Also