The Telerik DataGrid is prepared for such cases and employs a special kind of rendering. It is called flat group rendering mode and it is controlled by the GroupRenderMode property. It simply renders rows one below the other instead of nesting them on many levels. You can specify a RowDetailsTemplateSelector that selects a data template according to the type or data that this row contains.
- The WPF DataGrid has an interesting feature called RowDetails, which is an area of customisable content beneath each row.
- The settings of a grid and its elements can be persisted and re-applied using the SaveUserSettings and LoadUserSettings methods, respectively.
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- There is a good in-depth analysis in this blog post dedicated to light templates with more numbers and statistics.
Column Chooser
You can use the RowDetailsVisibilityMode property of the DataGrid to specify whether to display details just for the selected rows or for all the rows. Note also that the read-only view of this cell uses the StringFormat property of the Binding class to specify a format which matches that which is used by the DatePicker. Interestingly, the DatePicker picks up the current culture, whereas the TextBlock binding does not (yes, I live in the UK!). In this example, synchronized views of the Customer (master) and Orders (detail) tables of the Northwind database will be displayed.
Loading the Telerik WPF DataGrid with Data
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. Eventually, in August 2008, Microsoft released its DataGrid CTP (Community Technology Preview – a public beta) to CodePlex to coincide with the release of the .NET Framework 3.5 SP1 and Visual Studio 2008 SP1. The .NET Service Packs provided additional WPF functions including IEditableCollectionView, BindingGroup, and alternating row styles which are all used within the WPF DataGrid.
Row Details depending on the type of data
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. Rather than exhaustively cover all the various styling properties, this section will cover some of the DataGrid specific features, and also how to style some of the more tricky parts of the grid.
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A detailed overview of binding groups can be found on Vincent Sibal’s blog, and their usefulness extends far beyond that of validating DataGrid rows. By default, detail descriptions are automatically created for most detail relation types; however, they can also be explicitly defined. If some of the missing features are a must, you can combine the two components together. You can display the entire dataset using virtual grids and when the user wants to view a particular portion of the data in more detail, you can display this data in a DataGrid. Utilizing the QueryableCollectionView we talked about above is very neat in scenarios like this, because it gets populated with the proper FilterDescriptors whenever your users apply filters to your virtual grid. You can use this as an opportunity to populate your DataGrids and perhaps some graphs to create a dashboard.
Everything else – custom buttons, boxes, etc. can (and should) be easily built by the team out of the WPF or Avalonia primitives to meet the UX requirements. I hope you found this article helpful to get yourself better acquainted with the DataGrid control in the Telerik UI for WPF suite. 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. But loading a collection with millions of objects requires a lot of memory.
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. The SearchControl provides powerful search capability, providing end-users with an easy to use UI for finding items in the datagrid’s cells. wpf advanced datagrid Users can search forwards or backwards, and use keyboard shortcuts. Works with Master/Detail views, collapsed groups, and also with data virtualization enabled. In my experience, only two components from the large providers like Telerik were necessary – a window docking functionality and a data grid.
The FilterRow class represents a row in which values can be entered to filter the items in the corresponding columns. Custom type columns can also be filtered if they provide a TypeConverter (from string) and implement IComparable. The last and empty row will let you add to the data source, simply by filling out the cells.
We see that you have already chosen to receive marketing materials from us. If you wish to change this at any time you may do so by clicking here. Yavor is a Senior Software Developer on the Telerik UI for Xamarin team.
One of the coolest WPF features is the styling and template mechanism. Styles allow you to set the properties of a component in a tidy way and create a configuration that can be shared among many instances. Templates allow you to take control over the appearance of a component using ControlTemplate or the appearance of data using DataTemplate. What the creators of the DataGrid have done is take advantage of this mechanism and allowed you, the developer, to modify the appearance of the GridView (and any component for that matter) very granularly. Just this simple code change is all that is required to start using the power of IQueryable in your code.
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. This is indicted when the DataGrid invokes EndEdit on our bound item. An alternative method for providing data to your controls is through the use of an ObjectDataProvider. This class enables you to instantiate an object within your XAML resources for use as a data source.
If we examine the visual tree created for a simple GridView with 10 rows and 5 columns, you will find that it has spawned 1,339 visual elements (using the Windows 8 theme). It must be noted here that the Telerik DataGrid utilizes advanced techniques like UI element virtualization, so it only creates as many visual elements as can be displayed on your screen. The https://traderoom.info/ ObservableCollection class is a good candidate for our data binding needs. It exposes a CollectionChanged 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.
Data grids display data in rows and columns and in order to display your data, you need a collection of objects. The columns are constructed from the public properties of your objects. You can either use automatic column mapping or take manual control and define the columns yourself. In either case, there is no good or bad way, but an automatic and a manual one. In the markup, I have defined a couple of columns and then I use the RowDetailsTemplate to specify a template for the row details. The example in the attached source code presents a UI for editing the Customer table.
His 10+ years of XAML and WPF experience were gained in the Telerik UI for WPF and Silverlight suite as well as many LoB applications. His workday is a mixed bag of Xamarin, WPF and Angular development. Long gone are the days when the theme we got from the distributor was set in stone and couldn’t be modified. With the power and flexibility of WPF, you can customize every part of the Telerik DataGrid—and any component for that matter. Sometimes your data can be hierarchical with a parent – child relationship. Extending our current sample data, we can display the employees our managers are managing.
Displaying data is great, but the Telerik DataGrid also allows you to modify the data it is presenting. You can perform insert, update and delete operations with validation and everything. In order to enable it you need to flip a few switches and you are good to go. Make sure to be sure your collection is not read-only and that the type of objects in your data set have a public default constructor. Extended WPF Toolkit™ by Xceed is the number one collection of WPF controls, components and utilities for creating next generation Windows applications. Use it to build professional looking, modern, and easy to use WPF applications.