What is itemssource in wpf

To bind an ItemsControl to a collection object, use the ItemsSource property. Note that the ItemsSource property supports OneWay binding by default. When the ItemsSource property is set, the Items collection is made read-only and fixed-size.

When ItemsSource is in use, setting the property to null removes the collection and restores usage to Items , which will be an empty ItemCollection. When ItemsSource is not in use, the value of this property is null , and setting it to null has no effect.

In most cases you do not need to implement your own collections. See Binding Markup Extension for more information. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. The template now represents a TodoItem, which we declare in the Code-behind file, where we also instantiate a number of them and add them to a list.

In the end, this list is assigned to the ItemsSource property of our ItemsControl, which then does the rest of the job for us. Each item in the list is displayed by using our template, as you can see from the resulting screenshot. In the above examples, all items are rendered from top to bottom, with each item taking up the full row. This happens because the ItemsControl throw all of our items into a vertically aligned StackPanel by default.

It's very easy to change though, since the ItemsControl allows you to change which panel type is used to hold all the items. Here's an example:. We specify that the ItemsControl should use a WrapPanel as its template by declaring one in the ItemsPanelTemplate property and just for fun, we throw in an ItemTemplate that causes the strings to be rendered as buttons. You can use any of the WPF panels, but some are more useful than others.

Another good example is the UniformGrid panel, where we can define a number of columns and then have our items neatly shown in equally-wide columns:. Once you start using the ItemsControl, you might run into a very common problem: By default, the ItemsControl doesn't have any scrollbars, which means that if the content doesn't fit, it's just clipped. List containing DateTimeItem objects. ValueDataMember properties. View Example. May we contact you if we need to discuss your feedback in greater detail or update you on changes to this help topic?

All docs. General Information. DevExpress Installation. DevExpress Code Examples. Common Tools Project Converter.

Assembly Deployment Tool. Localization Service. Quality Assurance and Productivity. CodeRush Classic. TestCafe Studio. Controls WinForms. UWP Windows Tools WinForms Skin Editor. WPF Theme Designer. Coded UI Test Extension. Frameworks and Libraries.