GridView.InvalidateColumnHeader(GridColumn) Method

Invalidates a particular column header or the entire column header panel.

Namespace: DevExpress.XtraGrid.Views.Grid

Assembly: DevExpress.XtraGrid.v24.2.dll

Declaration

C#

public virtual void InvalidateColumnHeader(
    GridColumn column
)

VB.NET

Public Overridable Sub InvalidateColumnHeader(
    column As GridColumn
)

Parameters

Name	Type	Description
column	GridColumn	A GridColumn object representing the column whose header is to be repainted. null (Nothing in Visual Basic) to invalidate the entire column header panel.

Remarks

The InvalidateColumnHeader method may be useful when you custom paint column headers and need to redraw a particular header or all headers at once due to custom changes that don’t lead to automatic repainting. Refer to the Manually Invalidating Controls topic for more information.

Note

Detail pattern Views do not contain data and they are never displayed within XtraGrid. So, the InvalidateColumnHeader member must not be invoked for these Views. The InvalidateColumnHeader 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.

• 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 InvalidateColumnHeader(GridColumn) 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#

winforms-grid-hot-track-focused-column-header/CS/WindowsApplication1/Form1.cs#L38

{
    ((GridView)sender).InvalidateColumnHeader(e.FocusedColumn);
    ((GridView)sender).InvalidateColumnHeader(e.PrevFocusedColumn);

winforms-grid-add-check-box-to-column-header/CS/GridViewColumnHeaderExtender.cs#L89

    inHeader = false;
    view.InvalidateColumnHeader(column);
}

winforms-grid-custom-button-in-column-header/CS/WindowsApplication3/ColumnHeaderExtender.cs#L85

    column.Tag = state;
    view.InvalidateColumnHeader(column);
}

VB.NET

winforms-grid-hot-track-focused-column-header/VB/WindowsApplication1/Form1.vb#L39

Private Sub gridView1_FocusedColumnChanged(ByVal sender As Object, ByVal e As DevExpress.XtraGrid.Views.Base.FocusedColumnChangedEventArgs)
    CType(sender, GridView).InvalidateColumnHeader(e.FocusedColumn)
    CType(sender, GridView).InvalidateColumnHeader(e.PrevFocusedColumn)

winforms-grid-add-check-box-to-column-header/VB/GridViewColumnHeaderExtender.vb#L91

    inHeader = False
    _view.InvalidateColumnHeader(column)
End If

winforms-grid-custom-button-in-column-header/VB/WindowsApplication3/ColumnHeaderExtender.vb#L92

    column.Tag = state
    view.InvalidateColumnHeader(column)
End Sub