'宣言 Public Overloads Function InProgress( _ ByVal eventid As DropDownEventIds _ ) As Boolean
public bool InProgress( DropDownEventIds eventid )
Imports Infragistics.Win.UltraWinGrid Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click If Me.ultraGrid1.ActiveRow Is Nothing Then Return Dim eventManager As GridEventManager ' Get the grid's event manager. ' The event manager is used to temporarily disable events ' to prevent them from being raised. This can be very ' convenient in a situation where one or more properties ' are being set in code and the events they would normally ' raise would cause unnecessary or counter-productive ' code to be executed. ' ' Note: All events are enabled by default. eventManager = Me.ultraGrid1.EventManager ' Disable the Before/AfterSelectChange events eventManager.SetEnabled(GridEventIds.BeforeSelectChange, False) eventManager.SetEnabled(GridEventIds.AfterSelectChange, False) ' Toggle the selection state of the active row. ' Note: This would normally cause the Before/AfterSelectChange ' events to be raised. However, since the above code disabled ' the events they won't be. Me.ultraGrid1.ActiveRow.Selected = Not Me.ultraGrid1.ActiveRow.Selected ' Re-enable the Before/AfterSelectChange events eventManager.SetEnabled(GridEventIds.BeforeSelectChange, True) eventManager.SetEnabled(GridEventIds.AfterSelectChange, True) ' The 'AllEventsEnabled' property lets you enable/disable ' all events will a single line of code. If any event is ' disabled the 'AllEventsEnabled' property returns false. If eventManager.AllEventsEnabled = False Then eventManager.AllEventsEnabled = True End If ' The event manager also exposes an 'IsEnabled' method ' to see if an event is enabled or disbled. If False = eventManager.IsEnabled(GridEventIds.BeforeSelectChange) Then eventManager.SetEnabled(GridEventIds.BeforeSelectChange, True) End If ' The grid event manager also exposes overloaded ' 'IsEnabled' and 'SetEnabled' methods that take an ' event group so that, for example all 'Before' or all ' 'After' events can be enabled/disabled. If any event ' in the group is disabled the 'IsEnabled' method returns ' false. If False = eventManager.IsEnabled(EventGroups.BeforeEvents) Then eventManager.SetEnabled(EventGroups.BeforeEvents, True) End If eventManager.SetEnabled(EventGroups.AfterEvents, True) ' The 'InProgress' method will return true if the ' specified event is currently being raised. This ' is often helpful in methods that can be called ' from various points in an application to determine ' what is triggering the call. If eventManager.InProgress(GridEventIds.BeforeSelectChange) Then ' ... End If ' The UltraCombo and UltraDropDown controls also expose ' event managers for their custom events. However, ' since they have considerably fewer events they don't ' expose overloaded 'IsEnabled' and 'SetEnabled' methods ' to control groups of events. Dim comboManager As ComboEventManager comboManager = Me.ultraCombo1.EventManager comboManager.SetEnabled(ComboEventIds.BeforeDropDown, True) Dim dropDownManager As DropDownEventManager dropDownManager = Me.UltraDropDown1.EventManager dropDownManager.SetEnabled(DropDownEventIds.AfterCloseUp, True) End Sub
using Infragistics.Win.UltraWinGrid; private void button2_Click(object sender, System.EventArgs e) { if ( this.ultraGrid1.ActiveRow == null ) return; // Get the grid's event manager. // The event manager is used to temporarily disable events // to prevent them from being raised. This can be very // convenient in a situation where one or more properties // are being set in code and the events they would normally // raise would cause unnecessary or counter-productive // code to be executed. // // Note: All events are enabled by default. GridEventManager eventManager = this.ultraGrid1.EventManager; // Disable the Before/AfterSelectChange events eventManager.SetEnabled( GridEventIds.BeforeSelectChange, false ); eventManager.SetEnabled( GridEventIds.AfterSelectChange, false ); // Toggle the selection state of the active row. // Note: This would normally cause the Before/AfterSelectChange // events to be raised. However, since the above code disabled // the events they won't be. this.ultraGrid1.ActiveRow.Selected = !this.ultraGrid1.ActiveRow.Selected; // Re-enable the Before/AfterSelectChange events eventManager.SetEnabled( GridEventIds.BeforeSelectChange, true ); eventManager.SetEnabled( GridEventIds.AfterSelectChange, true ); // The 'AllEventsEnabled' property lets you enable/disable // all events will a single line of code. If any event is // disabled the 'AllEventsEnabled' property returns false. if ( !eventManager.AllEventsEnabled ) eventManager.AllEventsEnabled = true; // The event manager also exposes an 'IsEnabled' method // to see if an event is enabled or disbled. if ( !eventManager.IsEnabled(GridEventIds.BeforeSelectChange ) ) eventManager.SetEnabled(GridEventIds.BeforeSelectChange, true ); // The grid event manager also exposes overloaded // 'IsEnabled' and 'SetEnabled' methods that take an // event group so that, for example all 'Before' or all // 'After' events can be enabled/disabled. If any event // in the group is disabled the 'IsEnabled' method returns // false. if ( !eventManager.IsEnabled(EventGroups.BeforeEvents ) ) eventManager.SetEnabled(EventGroups.BeforeEvents, true ); eventManager.SetEnabled(EventGroups.AfterEvents, true ); // The 'InProgress' method will return true if the // specified event is currently being raised. This // is often helpful in methods that can be called // from various points in an application to determine // what is triggering the call. if ( eventManager.InProgress( GridEventIds.BeforeSelectChange ) ) { // ... } // The UltraCombo and UltraDropDown controls also expose // event managers for their custom events. However, // since they have considerably fewer events they don't // expose overloaded 'IsEnabled' and 'SetEnabled' methods // to control groups of events. ComboEventManager comboManager = this.ultraCombo1.EventManager; comboManager.SetEnabled( ComboEventIds.BeforeDropDown, true ); DropDownEventManager dropDownManager = this.ultraDropDown1.EventManager; dropDownManager.SetEnabled( DropDownEventIds.AfterCloseUp, true ); }