DataGrid in WPF

” Well, here’s the gist – these templates disable some of the DataGrid features like row details and hierarchical grid. Basic effects like hover and selection as well as grouping are still enabled, so make sure you check your grid before enabling those light templates. Good performance is vital for a good application user experience, which makes it a key priority for all applications. As you know, users hate slow and laggy applications and that’s why performance is one of the highest concerns for developers and managers alike.

That means faster loading, scrolling and performance overall. There is a good in-depth analysis in thisblog post dedicated to light templateswith more numbers and statistics. Let’s use this model and bind the ItemsSource property of the RadGridView. It is of type IEnumerable, as you would expect, and indeed it can accept any enumerable.

Card View

I have been trying to set up the ClipboardContentBinding event, but could not get it working. I am using MVVM, but would be fine with a code behind solution as well. The DataGridControl class also exposes the ExportToXps method, which allows a grid to be exported as an XPS document.

Paging or filtering are other data manipulations that can see a huge boost if executed on the server. Not only that, but when you want to filter, sort and then read the data only a few records at a time, then the task at hand becomes very difficult if you don’t use IQueryable. This can be much more efficient in terms of memory and transport. Application performance begins to slow down when there is too much going on in the UI thread. In WPF applications one of the reasons could be the complexity and size of the visual tree.

When a user deletes a row with the DataGrid control, the CollectionChanged event is fired on the bound collection. In the event handler, we invoke the DAL DeleteCustomer method with the wrapped data object passed as the parameter. The .NET Service Packs provided additional WPF functions including IEditableCollectionView, BindingGroup, and alternating row styles which are all used within the WPF DataGrid. Another small yet very highly welcome feature of SP1 is the Binding.StringFormat which provides a simple mechanism for formatting bound data, as described in this blog post. DataGrid allows you to reorder columns by dragging a column but you may disable this feature by setting the CanUserReorderColumns property to false. The following code snippet sets CanUserReorderColumns properties to false.

Click on the icon at the top right of xamDataGrid to view settings. Select the field type “Field” in the dropdown and click Add button to add the field. Click on the icon at the top right of the xamDataGrid to view its settings.

How to template autogenerated columns

However, there are several third-party component vendors that provide rich WPF data controls and one of those component vendors is Infragistics. This article has been a bit of a mixed-bag of samples; however, I hope that some of you out there will find something of use to you. The WPF DataGrid, although currently rough around the edges, is a control with great potential. Personally, I hope Microsoft puts a lot more effort into the design-time support of this control and the WPF Framework, in general.

• This article provides a number of practical examples which demonstrate how to perform validation, styling, and DataSet integration with the new WPF DataGrid.
• You can do filter expressions that check if the values in your columns start with a specific string value, or is greater, equal, lesser than or between given values.
• There is already an excellent document processing library that has been developed for Telerik tools, and of course it is well integrated into the Telerik WPF DataGrid.

The data grid is also editable and when you click on a cell, the cell will become editable. To determine when a user finishes editing a bound item, we need to delve a little deeper into the binding mechanism itself. Typically, an object implementing this interface would return to its state at the point when the BeginEdit method was called as a response to the CancelEdit method being invoked. However, in this instance, we are not really concerned about being able to cancel edits; all we really need to know is when the user has finished editing a row.

All About the Telerik WPF DataGrid

The templated control which displays the error indicator is a child of the DataGridRow; therefore, we can obtain the validation errors from the row via a FindAncestor RelativeSource binding. The WPF DataGrid has columns of type Text, Hyperlink, CheckBox, and ComboBox. If these column types do not fulfill your needs, either in read-only mode or when the cells are in edit mode, then you can define your own column type using templates. Users of the ASP.NET GridView will find this approach very familiar; you simply define a DataTemplate for rendering your data in read-only or edit mode.

As you can see, there are no UI framework specific interfaces or classes exposed by the DAL. The problem here is how to bind the customers returned by ICustomerDataAccess.GetCustomers to our DataGrid and ensure that changes are synchronised with the database. Any updates / deletions to the Customer or Order rows are written to the database. However, the interface is a little peculiar in that when inserting a new order row via the bottom DataGrid, you have to type in the related CustomerID. It would make sense to remove this column and the generated ID from the interface. The XAML below demonstrates how a master / detail view may be achieved.

It exposes a https://traderoom.info/Changed event which is fired whenever items are added or removed from the collection. If we copy our customer data into an ObservableCollection and bind this to the DataGrid, we can handle the CollectionChanged event and perform the required operation on the DAL. The following code snippet shows how the CustomerObjectDataProvider constructs an ObservableCollection of CustomerUIObjects. These UI objects simply wrap their data object counterparts in order to expose the same properties.

Column Chooser

What the Telerik WPF grid offers is a special descendant ofQueryableCollectionViewthat utilizes the power of IQueryable on your behalf—meet theVirtualQueryableCollectionView. If you want to obtain the items from your database 20 rows at a time, you can expose your data as IQueryable and wrap it in a VirtualQueryableCollectionView withLoadSizeset to 20. Then, just pass this virtual collection to the Data Grid and voila—the GridView will now create queries for obtaining the data. IQueryable, compared to IEnumerable , allows some data-savvy components to not only get the items needed for display, but also create queries that can potentially be executed on a remote computer.

In the items argument you get the data and you can determine which data template to display. To delete a record, simply select a row in the data grid and press the DELETE button on the keyboard. XamDataGrid supports various styles and themes to change the look and feel of the control. Check out XamDataGrid Designing The Look and Feel help documentation for more details. One of the first operations we do on a data-bound control is, to bind the control to a data source and load data into the control. Building great looking fully-functional complex data-driven applications is a time-consuming affair.

The MaxColumnWidth and MinColumnWidth properties represent the maximum width and minimum width of columns in a DataGrid. The Author class looks like Listing 2 that has ID, Name, DOB, BookTitle, and IsMVP members. Figure 1 shows Toolbox and XAML code preview after a DataGrid is added to a page. And now the clipboard contains all cells data and also my export to CSV works fine.

This example demonstrates how to use a DataGrid to perform CRUD operations via binding where the database integration is decoupled via a Data Access Layer . The complete example above is found in the MasterDetailExample class. However, please note that any exception that occurs when the data is being updated is not being handled, which will result in the in-memory DataTable no longer being synchronized with the database. This design-time support is certainly nice to have; however, it is very easily missed as it inserts a single menu option into an existing context menu. Fortunately, the absence of this control has not hampered the popularity of WPF. The versatility of the ListView control allows very flexible read-only DataGrid functionality.

This example describes how to connect a Typed DataSet to the DataGrid in such a way that row modifications, deletions, and insertions are written to the database. The BorderBrush and BorderThickness properties are used to set the color and width of the border. The following code snippet sets border color to gray and thickness to 5. The following code snippet sets background, row background, and alternative row background colors of a DataGrid.

Frozen Columns

The default value of these properties is Auto, that means, when scrolling is needed, you will see it, otherwise it will be hidden. You can sort a column by simply clicking on the column header. The Background property is used to set the background color of the DataGrid. The RowBackground and AlternativeRowBackground properties are used to set the background color of rows and alternative of the DataGrid. The HeaderVisibility property is used to show and hide row and column headers.

wpf advanced datagrid put, when there are lots of visual objects that need to be measured, arranged and painted, the time needed for those operations can increase beyond what is considered reasonable. It comes in all shapes and sizes and it’s in the core of all applications. Of all the types of visualizations, the data grid is the most widely used and ubiquitous. This feature can be useful in some scenarios when your data set is not too complex.

In this example, synchronized views of the Customer and Orders tables of the Northwind database will be displayed. And, the modified XAML below uses the ObjectDataPerovider class to define an instance of the above class as our data source. Note that we are still binding the DataGrid’s ItemsSource to the inherited DataContext. The following code snippet sets the SelectionMode to Extended. Now let’s create a collection of Author objects by using the List class. The LoadCollectionData method in Listing 3 creates a List of Author objects.

Now, our goal is to bind the xamDataGrid control to a data source so we can load data in the grid control. The WPF DataGrid can be styled in a highly flexible manner by applying Styles or Templates in the same way as for all of the other WPF controls. Many of the grid’s properties such as CellStyle and RowStyle are quite obvious.