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Scroll Mouse In DataGrid In Silverlight

Posted By:Diptimaya Patra       Posted Date: March 26, 2010    Points: 25    Category: Silverlight    URL: http://www.dotnetspark.com  

Scroll Mouse In DataGrid In Silverlight. In this article we will see how can we scroll with mouse for a DataGrid.


In this article we will see how can we scroll with mouse for a DataGrid.

Creating Silverlight Project

Fire up Visual Studio 2008 and create a new Silverlight 3 Project. Name it as MouseScroll.


Add a Class to the Silverlight Project and name it as ScrollDataGrid.cs

Now inherit DataGrid to the class as follows:

public class ScollDataGrid: DataGrid


You need to use the following namespaces in this class.
using System.Windows.Automation.Peers;
using System.Windows.Automation.Provider;
using System.Windows.Automation;

Now write a method for OnMouseWheel as described below:

protected override void OnMouseWheel(MouseWheelEventArgs e)
  //Try getting the automationpeer from this datagrid
  AutomationPeer automationPeer = FrameworkElementAutomationPeer.FromElement(this);
  if (automationPeer == null)
 //if not try creating a new one for this datagrid
  automationPeer = FrameworkElementAutomationPeer.CreatePeerForElement(this);
  //Try getting the scroll provider for this datagrid
  IScrollProvider scrollProvider = automationPeer.GetPattern(PatternInterface.Scroll) as IScrollProvider;
  if (scrollProvider != null)
 ScrollAmount scrollAmount = ScrollAmount.NoAmount;
  if (e.Delta < 0)
 scrollAmount = ScrollAmount.SmallIncrement;//for scroll down
  else if (e.Delta > 0)
 scrollAmount = ScrollAmount.SmallDecrement;//for scoll up
  if (scrollProvider.VerticallyScrollable)
 scrollProvider.Scroll(ScrollAmount.NoAmount, scrollAmount);

Now in the MainPage.xaml add the namespace as follows:


Now place a DataGrid of type ScrollDataGrid and use the normal properties of DataGrid to look better.

Now we will write some dummy data to fill in the DataGrid.

public class PersonalData
  public string FirstName { get; set; }
  public string LastName { get; set; }
  public int Age { get; set; }

Create a list of the above class and bind data to DataGrid.

public partial class MainPage : UserControl
  List myList;
  public MainPage()
  #region Dummy List
  myList = new List 
  new PersonalData{ FirstName="FirstName1", LastName="LastName1", Age=39},
  new PersonalData{ FirstName="FirstName2", LastName="LastName2", Age=40},
  new PersonalData{ FirstName="FirstName3", LastName="LastName3", Age=41},
  new PersonalData{ FirstName="FirstName4", LastName="LastName4", Age=42},
  new PersonalData{ FirstName="FirstName5", LastName="LastName5", Age=43},
  new PersonalData{ FirstName="FirstName6", LastName="LastName6", Age=44},
  new PersonalData{ FirstName="FirstName7", LastName="LastName7", Age=45},
  new PersonalData{ FirstName="FirstName8", LastName="LastName8", Age=46},
  new PersonalData{ FirstName="FirstName9", LastName="LastName9", Age=47},
  new PersonalData{ FirstName="FirstName10", LastName="LastName10", Age=48},
  new PersonalData{ FirstName="FirstName11", LastName="LastName11", Age=49},
  new PersonalData{ FirstName="FirstName12", LastName="LastName12", Age=50},
  new PersonalData{ FirstName="FirstName13", LastName="LastName13", Age=51},
  new PersonalData{ FirstName="FirstName14", LastName="LastName14", Age=52},
  myDataGrid.ItemsSource = myList;

That's it now run your application and scroll the DataGrid with your mouse. 


Hope this helps.
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