This example demonstrates how to add the "Open a new tab" button to DXTabControl.
Update: Starting from version 15.1, TabControl supports this functionality out of the box. Please refer to this article for more details: Adding and Removing Tab Items (update the example description).
This example demonstrates how to implement the grid's PickerColumn whose items are coming from the grid's underlining data source.
In this example, a grid is bound to a collection of the Order objects. Each order contains information about a customer (the CustomerId property). A customer is represented by a Customer object that has the Id and Name properties. Customer objects are stored in an IList collection (however, it can be any object that implements the IEnumerable interface). The following properties of the PickerColumn object are set to show customer names for orders in this column within the grid (see the MainPage.xaml file):
- FieldName– an order's property to be bound to a column (CustomerId).The concept of cascading combo boxes requires sending a callback to the server to get data for the second editor based on the first editor's selected value.
In the meantime, it's impossible to send callbacks for built-in editors and it's necessary to use the EditItemTemplate (see ASPxGridView - Batch Edit - Support a scenario when GridViewComboBoxColumn is used in callback mode).
A basic scenario of this approach requires the following steps:
1) Use the client-side ASPxClientGridView.BatchEditStartEditing and ASPxClientGridView.BatchEditEndEditing events to provide the template combo box with values.
2) Handle the SelectedIndexChanged event to send callbacks if it's required.
3) Handle the ASPxClientComboBox.EndCallback event for the second editor to apply the selected item after a callback.
4) Handle the ASPxClientGridView.Init and ASPxClientGridView.EndCallback events to initialize and reset global variables responsible for data providing logic after the grid was refreshed.
The attached example illustrates how to implement all these steps.
Dear sir
Binding City Editor , if i have more then 400,000 cities need to be bind, Shall i used same binding concept of i used linqservermodedatasource for the binding to increase performance. Can you please send me sample project how can i use linqservermodedatasouce.
Thanks for your time
Hello,
To process your recent post more efficiently, I created a separate ticket on your behalf: T142172: ASPxGridView - How to implement cascading comboboxes bound to a large data in Batch Edit mode . This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.
in CITY edittor inside GridViewDataComboBoxColumn , EditItemTemplate instead of ASPxComboBox i can use aspxlookup becuase i want to provide user to search item based on incremental search
Umesh
Added By: Artem (DevExpress Support) at: 8/20/2014 11:57:38 PMHello,
To avoid discussing multiple topics in this thread, I created a separate ticket on your behalf: T142423: ASPxGridView - Batch Edit - How to use ASPxGridLookup bound to a large database with incremental filtering in EditItemTemplate. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.
Dear Support Team,
I've integrated this solution into my project.
It is working well but I have little (huge) problem with it.
If I use Enter key to move cursor from the column to the next column, which is a cascased combobox, and I'm fast and I use 2 times Enter key the combobox value is shown and cleared and the focused column is the next column after combobox.
I've analyzed the code.
The OnBatchEditStartEditing set value of Combobox but the PerformCallback of combobox clears it.
In client side event endcallback I reset it back to the original value. It is working well if I do not leave the combobox column fast.
I hope you have solution for this problem.
Best Regards,
Zoltán
How do u refresh the total if user delete the row? it is deleting row will raise the BatchEditEndEditing event?
Added By: Larry (DevExpress Support) at: 6/23/2015 5:32:44 AMHello,
To process your recent post more efficiently, I created a separate ticket on your behalf: T258932: GridView - Batch Edit - How to detect when the delete button is clicked. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.
This example demonstrates how to implement your classes, to save the referential integrity of your tables when removing master objects being referenced by other objects. This solution is appropriate when you have the Deferred Deletion feature of XPO turned off. Without the code in this example, you will get an SQLException. This solution will allow you to provide your users with more meaningful exceptions, when such a situation takes place.
The Master object in this example has an aggregated One-To-Many relationship to Child objects. If a Master object has some aggregated children, it can be immediately deleted with all associated Child objects. However, if there is a Neighbour object, having a reference (without association) to this Master object, the code will raise an exception, notifying about existing referencing objects.
See Also:
Core - Introduce an automatic check to the deleting algorithm whether an object is referenced by any other object
Deferred deletion and (foreign key) exception handling
OK, Thanks, I got it.
Added By: Mark Callahan at: 6/23/2015 7:28:38 AMthis sample but with Office2013 style ?. thanks
To post values immediately, subscribe to the CellValueChanging event and call the View.PostEditor method.
If you don't want to handle events, check the E4155 - How to make GridControl immediately save changes in a cell after editing example demonstrating how to create a custom helper that does the entire job automatically.
UPDATE: Starting with version 15.1, you can use the DataViewBase.EnableImmediatePosting property to post values to a data source without leaving an edited cell.
This example shows how to update GridControl's data source right after a cell editor value has been changed. To implement this scenario, we created a custom helper class exposing the CommitHelper.CommitOnValueChanged attached property.
This example uses the same idea as the one demonstrated in the E1801 - How to post values to the DXGrid DataSource immediately after changing a cell value thread. If you don't want to use custom helpers, check the solution from the E1801 example instead.
UPDATE: Starting with version 15.1, you can use the DataViewBase.EnableImmediatePosting property to post values to a data source without leaving an edited cell.
Great example.
One thing to note --> It may be necessary to call view.ActiveEditor.EditValue = view.Grid.GetCellValue(e.RowHandle, e.Column); after the call to view.PostEditor(); to display the value that was actually stored. The problem here is, the value that actually gets stored doesn't get displayed to the user. The call to GetCellValue will show the user the value that was actually persisted.
I am getting a error stating that CommitOnValueChanged was not found in CommitHelper. Event the Example has the same error. The CommitHelper class does not have a method called CommitOnValueChanged either. Am I missing something? As it sits the example won't even compile.
Added By: Puneet Lulla at: 3/10/2014 11:37:35 PMEven i am getting the same problem like Gregory Colton. Please provide some assistance as soon as possible
Added By: Jaap Vliet at: 9/24/2014 2:11:00 AMWorks only in a Tableview, but easy to edit for a Treelistview
Added By: Alexander S (DevExpress Support) at: 9/24/2014 3:57:35 AM Hi Jaap,Added By: Arjan Douwes 1 at: 1/13/2015 3:53:16 AM[C#]classCommitHelper{publicstaticreadonlyDependencyPropertyCommitOnValueChangedProperty=DependencyProperty.RegisterAttached("CommitOnValueChanged",typeof(bool),typeof(CommitHelper),newPropertyMetadata(CommitOnValueChangedPropertyChanged));publicstaticvoidSetCommitOnValueChanged(GridColumnBaseelement,boolvalue){element.SetValue(CommitOnValueChangedProperty,value);}publicstaticboolGetCommitOnValueChanged(GridColumnBaseelement){return(bool)element.GetValue(CommitOnValueChangedProperty);}privatestaticvoidCommitOnValueChangedPropertyChanged(DependencyObjectsource,DependencyPropertyChangedEventArgse){GridColumnBasecol=sourceasGridColumnBase;if(col.View==null)Dispatcher.CurrentDispatcher.BeginInvoke(newAction<GridColumnBase,bool>((column,subscribe)=>{ToggleCellValueChanging(column,subscribe);}),col,(bool)e.NewValue);elseToggleCellValueChanging(col,(bool)e.NewValue);}privatestaticvoidToggleCellValueChanging(GridColumnBasecol,boolsubscribe){if(!(col.ViewisDataViewBase))return;if(subscribe){if(col.ViewisTreeListView)(col.ViewasTreeListView).CellValueChanging+=TreeCellValueChanging;else(col.ViewasGridViewBase).CellValueChanging+=GridCellValueChanging;}else{if(col.ViewisTreeListView)(col.ViewasTreeListView).CellValueChanging-=TreeCellValueChanging;else(col.ViewasGridViewBase).CellValueChanging-=GridCellValueChanging;}}staticvoidTreeCellValueChanging(objectsender,TreeListCellValueChangedEventArgse){if((bool)e.Column.GetValue(CommitOnValueChangedProperty))(senderasDataViewBase).PostEditor();}staticvoidGridCellValueChanging(objectsender,CellValueChangedEventArgse){if((bool)e.Column.GetValue(CommitOnValueChangedProperty))(senderasDataViewBase).PostEditor();}}
This sample has a serious perfromance issue when there are many columns in a grid.
The current implementation causes the event to be called as many times as there are columns in the grid.
To resolve this issue add e.Handled = true to the TreeCellValueChanging and GridCellValueChanging eventhandlers.
The original code:
if ((bool)e.Column.GetValue(CommitOnValueChangedProperty))
(sender as DataViewBase).PostEditor();
becomes:
if ((bool)e.Column.GetValue(CommitOnValueChangedProperty))
{
(sender as DataViewBase).PostEditor();
e.Handled = true;
}
By default, ComboBoxEdit allows you to select one item using the autocomplete feature.
This example provides a way to enable the behavior when the autocomplete feature works for multiple item selection.
Firstly, it is necessary to create a ComboBoxEdit descendant and override the CreateEditStrategy method, which should return your own ComboBoxEditStrategy class descendant.
Then, override and implement the ProcessChangeText method, and some more methods to enable item auto-searching selection.
For unimpeded search and selection of items without losing input field focus, the set FocusPopupOnOpen property to False.
UPDATE: In 15.1, we provided this feature out of the box. Please refer to this thread to get more information: Q561698: Provide ComboBoxEdit incremental search functionality
The Agenda view is a list of upcoming events grouped by the appointment's date. This list can be displayed in the GridControl component.
This example demonstrates how to implement this behavior.
Please see "Implementation Details" (click the corresponding link below this text) to learn more about technical aspects of this approach implementation.
This example demonstrates how to make the ASPxScheduler take the entire container content. The scheduler lies inside the ASPxSplitter control. It automatically changes height depending on the window size.
The height is calculated on the client side. Then, the calculated value is applied to the ScrollAreaHeight property of the Day View, Work-Week View and Full Week View and
to the DateCellBody property of the Month View.
Review the How to: Set the Scheduler's Size article to get more information about these properties.
This example demonstrates how to embed the ExpressionEditorForm into the PanelControl and provide a functionality to apply expressions to unbound GridColumns.
Does this work for Silverlight? I'd like to use the expression editor stand-alone in Silverlight.
Added By: Anders Wang at: 6/24/2015 12:53:08 AMHi,
The GridControl in the sample always no data can be showned. Please correct the example. Thanks.
[JScript]function UpdateGridView(s, e){ PrepareValidationScripts(); var form = $('#frmProduct'); var validator = $.data(form[0], 'validator'); validator.form(); var timer = window.setInterval(function(){ if(form.data('validator').pendingRequest > 0) return; clearInterval(timer); if(validator.valid()) GridView.UpdateEdit(); }, 100); }
The Value format condition (FormatConditionValue) allows you to compare dimension/measure values with predefined static values.
This example demonstrates how to apply conditional formatting to Grid cells whose values are greater than, less than or between the specified values.
The example demonstrate how to filter ASPxGridView's DataRows based on the Selection state. The outside ASPxComboBox editor performs a custom ASPxGridView callback and determines the filtering mode. ASPxGridView's FilterExpression is combined via the InOperator / GroupOperator objects - special types for data filtering.
See Also:
DevExpress.Data.Filtering Namespace
how to use the filtering when there is a composite key for a grid?
Added By: Vladimir (DevExpress Support) at: 6/25/2015 2:37:07 AMHello,
To process your recent post more efficiently, I created a separate ticket on your behalf: ASPxGridView - How to filter our only selected/unselected rows in case of a composite key. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.
The Top-Bottom (FormatConditionTopBottom) format conditions allow you to highlight a specific number of topmost/bottommost values. This example shows how to apply conditional formatting to the specified number of top/bottom values. The number of values can be specified as an absolute value or a percentage of all values.
The Average format condition (FormatConditionAverage) is used to highlight values above or below an average value.