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   [Expand]ASPxPivotCustomizationControl Class
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    [Expand]ASPxPivotGrid Methods
   [Expand]ASPxPivotGridExporter Class
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   [Expand]PivotAddPopupMenuItemEventArgs Class
    PivotAddPopupMenuItemEventHandler Delegate
   [Expand]PivotAreaChangingEventArgs Class
    PivotAreaChangingEventHandler Delegate
   [Expand]PivotAreaStyle Class
   [Expand]PivotCellBaseEventArgs Class
   [Expand]PivotCellDisplayTextEventArgs Class
    PivotCellDisplayTextEventHandler Delegate
   [Expand]PivotCellStyle Class
   [Expand]PivotCellValueEventArgs Class
   [Expand]PivotChartDataSourceRow Class
    PivotCollapsedStateStoreMode Enumeration
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    PivotCustomCellStyleEventHandler Delegate
   [Expand]PivotCustomChartDataSourceDataEventArgs Class
    PivotCustomChartDataSourceDataEventHandler Delegate
   [Expand]PivotCustomChartDataSourceRowsEventArgs Class
    PivotCustomChartDataSourceRowsEventHandler Delegate
   [Expand]PivotCustomFieldValueCellsEventArgs Class
   [Expand]PivotCustomFilterPopupItemsEventArgs Class
   [Expand]PivotCustomGroupIntervalEventArgs Class
   [Expand]PivotCustomizationFormImages Class
   [Expand]PivotDataAreaPopupCreatedEventArgs Class
    PivotDataHeadersDisplayMode Enumeration
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    PivotFieldDisplayTextEventHandler Delegate
   [Expand]PivotFieldEventArgs Class
    PivotFieldEventHandler Delegate
   [Expand]PivotFieldFilterChangingEventArgs Class
    PivotFieldFilterChangingEventHandler Delegate
   [Expand]PivotFieldPropertyChangedEventArgs Class
    PivotFieldPropertyChangedEventHandler Delegate
   [Expand]PivotFieldStateChangedCancelEventArgs Class
    PivotFieldStateChangedCancelEventHandler Delegate
   [Expand]PivotFieldStateChangedEventArgs Class
    PivotFieldStateChangedEventHandler Delegate
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    PivotFieldValueEventHandler Delegate
   [Expand]PivotFieldValueStyle Class
   [Expand]PivotFilterButtonPanelStyle Class
   [Expand]PivotFilterButtonStyle Class
   [Expand]PivotFilterItemStyle Class
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   [Expand]PivotGridCallbackStateEventArgs Class
    PivotGridCallbackStateEventHandler Delegate
   [Expand]PivotGridCellTemplateContainer Class
   [Expand]PivotGridCellTemplateItem Class
   [Expand]PivotGridClientSideEvents Class
   [Expand]PivotGridCustomCallbackEventArgs Class
   [Expand]PivotGridCustomFieldSortEventArgs Class
    PivotGridCustomFieldSortEventHandler Delegate
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   [Expand]PivotGridCustomSummaryEventArgs Class
    PivotGridCustomSummaryEventHandler Delegate
   [Expand]PivotGridCustomTotal Class
   [Expand]PivotGridCustomTotalCollection Class
   [Expand]PivotGridEmptyAreaTemplateContainer Class
   [Expand]PivotGridField Class
   [Expand]PivotGridFieldCollection Class
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   [Expand]PivotGridHeaderTemplateContainer Class
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    PivotGridPopupMenuType Enumeration
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   [Expand]PivotGridStyles Class
   [Expand]PivotGridWebFieldOptions Class
   [Expand]PivotGridWebGroup Class
   [Expand]PivotGridWebGroupCollection Class
   [Expand]PivotGridWebOptionsBehavior Class
   [Expand]PivotGridWebOptionsChartDataSource Class
   [Expand]PivotGridWebOptionsCustomization Class
   [Expand]PivotGridWebOptionsData Class
   [Expand]PivotGridWebOptionsDataField Class
   [Expand]PivotGridWebOptionsFilter Class
   [Expand]PivotGridWebOptionsLayout Class
   [Expand]PivotGridWebOptionsLoadingPanel Class
   [Expand]PivotGridWebOptionsPager Class
   [Expand]PivotGridWebOptionsView Class
   [Expand]PivotGroupEventArgs Class
    PivotGroupEventHandler Delegate
   [Expand]PivotHeaderStyle Class
   [Expand]PivotHtmlCellPreparedEventArgs Class
    PivotHtmlCellPreparedEventHandler Delegate
   [Expand]PivotHtmlFieldValuePreparedEventArgs Class
    PivotHtmlFieldValuePreparedEventHandler Delegate
   [Expand]PivotOlapExceptionEventArgs Class
    PivotOlapExceptionEventHandler Delegate
   [Expand]PivotPopupMenuCreatedEventArgs Class
   [Expand]PivotQueryExceptionEventArgs Class
    PivotQueryExceptionEventHandler Delegate
    PivotScrollingMode Enumeration
   [Expand]PivotXlsExportOptions Class
   [Expand]PivotXlsxExportOptions Class
   [Expand]WebCustomExportCellEventArgs Class
   [Expand]WebCustomExportFieldValueEventArgs Class
   [Expand]WebCustomExportHeaderEventArgs Class
   [Expand]WebPivotGridOptionsPrint Class
  [Expand]DevExpress.Web.ASPxPivotGrid.Data
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 End-User Documentation

ASPxPivotGrid.LayoutUpgrade Event

Occurs when a layout is restored from a data store, and its version is different than that of the control's current layout version.

Namespace:DevExpress.Web.ASPxPivotGrid
Assembly:DevExpress.Web.ASPxPivotGrid.v17.2.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type LayoutUpgradeEventArgs containing data related to this event.

The following LayoutUpgradeEventArgs properties provide information specific to this event.
Property Description
NewHiddenItems Returns an array of items that exist in the current control but do not exist in the layout being loaded. These items are hidden. This property is in effect for the DevExpress.XtraLayout.LayoutControl.
PreviousVersion Returns the textual representation of the previous layout version.

Expanded Remarks

This event allows you to customize the control's layout after an earlier version of the layout has been loaded from a data store (a stream or a string). For instance, the layout being loaded has overridden specific filtering or sorting settings of the new layout. So, the LayoutUpgrade event can be handled to restore layout settings specific to the new layout.

To enable the LayoutUpgrade event to be called, you need to assign different versions to different layouts via the DevExpress.Utils.OptionsLayoutBase.LayoutVersion property of the OptionsLayout object.

Consider an example. When the first version of an application was released, the version of the control's layout was not specified (it was set to an empty string, by default). While running this application, an end-user hid specific fields and saved the layout to a file. Then, a new version of the application was designed (for instance, it added new fields and data could be filtered against any of these fields). At design time, the new layout in the new application should be assigned a specific version (say, "1.1"). In this case, when an end-user runs the new application and loads the previously saved layout from the file, the LayoutUpgrade event will be fired since the versions of the current layout ("1.1") and the layout being loaded ("") will not match. In the LayoutUpgrade event handler, you can specify the positions of the newly added fields and restore the filter settings of these fields, if required.

If versions of the current layout and the layout being loaded match, the LayoutUpgrade event will not fire.

The OptionsLayout property provides multiple settings that control how the layout is restored from the data store. It also specifies which settings should be stored when the layout is saved to the data store.

The BeforeLoadLayout event can be handled, to prevent a layout from being loaded from a data store.

Expanded See Also

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