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DataSet Watch 2.0

, 29 Dec 2006
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An enhanced DataSet Visualizer for Visual Studio 2005.

Sample Image - DSWshot_small.png


I've been using the excellent VS2003 add-in called DataSet QuickWatch by Mohammed Barqawi, and also its enhanced version by Fahad Khalil, for a long time now. Visual Studio 2005 has Visualizers, but the default one for DataSets is too simplistic. So inspired by DataSet QuickWatch, I decided to create an advanced Visualizer for large DataSets.

The Code

One of the greatest features of Visual Studio 2005 is Visualizers. These are viewers for examining the values of complex type variables at runtime. The procedure I followed for creating a Visualizer was as follows:

Create the Visualizer

Create a project of type "Class Library". Rename your .cs file / class to your desired name.

Add a reference to Microsoft.VisualStudio.DebuggerVisualizers.dll and add the corresponding using clause to your class.

using Microsoft.VisualStudio.DebuggerVisualizers;

Inherit your class from DialogDebuggerVisualizer.

class DataSetWatch : DialogDebuggerVisualizer 

Override the Show method of the base class in your class. Intellisense helps here because when you type protected override and select Show, it automatically generates a signature of the function, saving you from some hand coding.

protected override void Show(IDialogVisualizerService windowService, 
          IVisualizerObjectProvider objectProvider)

Now, we need to tell Visual Studio what Types our visualizer will handle, this will be done with the following assembly attribute in AssemblyInfo.cs:

[assembly: System.Diagnostics.DebuggerVisualizer( 
   Target = typeof( System.Data.DataSet), 
   Description = "DataSet Watch")]

Now that our class library has been setup, we can start writing code to get data from the debugger.

protected override void Show(IDialogVisualizerService 
        windowService, IVisualizerObjectProvider objectProvider)
   DataSet ds = (DataSet)objectProvider.GetObject();

After the DataSet Watch dialog has been closed, the original DataSet held by the debugger must be updated with changes made by DSWatch.

if ( objectProvider.IsObjectReplaceable) { objectProvider.ReplaceObject(ds); }

Create a Debugging Host

The Visualizer is now ready to use, and can be dropped into the My Documents\Visual Studio 2005\Visualizers directory. But during development, we need to debug it. This is not possible in the curent circumstances. First, we add a temporary hook to the Visualizer for debugging purposes. We add the following function to the DataSetVisualizer class:

public static void TestShowVisualizer(object objectToVisualize)
    VisualizerDevelopmentHost myHost = new 
          VisualizerDevelopmentHost(objectToVisualize, typeof(DataSetWatch)); 

So in order to overcome this debugging limitation, we add another Console Application type project into the solution that will act as a host for debugging the Visualizer.

Add a reference to the DataSetWatch project and to the Microsoft.VisualStudio.DebuggerVisualizers.dll.

At the point in your code where you want to inspect a test DataSet, add the following call:


This will launch the DataSet Watch window and allow you to debug its code.

... and that's pretty much it. Rest of the code is generic WinForms stuff, and isn't really worth discussing.


DataSet Watch 2.0 provides the following enhancements over the classic add-in:

  • Dynamically resizing controls and window (yay).
  • Full-screen grid popup for viewing very large DataSets.
  • XML schema viewing support.
  • Ability to add, rename, and remove tables to/from DataSet.
  • Ability to hide selected tables in case there are many tables in the DataSet.
  • Ability to add, rename, and remove columns to/from tables.
  • Ability to hide selected columns in case of tables with large number of columns.
  • Changes made to DataSet in DataSet Watch are reflected in the original DataSet.
  • Easy deployment, simply drop the DLL into My Documents\Visual Studio 2005\Visualizers.
  • Row filtering.
  • Typed DataSet support.
  • DataTable support.
  • RowState viewing support.
  • Table relation create/edit/delete support (planned).
  • DataTable snapshots allowing you to save a snapshot of a table for future reference (planned).
  • Diff/Compare support for comparing a table with previous snapshots (planned).
  • ... others (as suggestions come in).


  • [15-11-2006] Build 4 is here !
    • Added TypedDataSet support.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Osama Abbas
Web Developer
Pakistan Pakistan
Currently working at NetSol Technologies, Team inBanking

Comments and Discussions

GeneralGreat tool but some errors PinmemberMCSDvikasmisra2-Apr-08 22:24 
GeneralThanks! Pinmemberfelix.reychman@agero.se15-Aug-07 21:56 
GeneralRe: Thanks! PinmemberOsama Abbas16-Aug-07 4:47 
GeneralRe: Thanks! Pinmemberfadee25-Aug-07 3:22 
QuestionObject not set to in instance of an object PinmemberMember #363896012-Feb-07 9:28 
AnswerRe: Object not set to in instance of an object PinmemberOsama Abbas12-Feb-07 18:33 
GeneralRe: Object not set to in instance of an object PinmemberJLibertor13-Feb-07 8:12 
QuestionLost changes Pinmemberpgago12-Feb-07 7:05 
AnswerRe: Lost changes PinmemberOsama Abbas12-Feb-07 18:28 
GeneralSerialization error PinmemberMember #2632289-Jan-07 12:01 
GeneralRe: Serialization error PinmemberOsama Abbas9-Jan-07 19:21 
QuestionInstallation? PinmemberUrs Enzler3-Jan-07 21:39 
AnswerRe: Installation? PinmemberOsama Abbas3-Jan-07 21:55 
GeneralRe: Installation? PinmemberUrs Enzler3-Jan-07 22:58 
GeneralRe: Installation? PinmemberOsama Abbas3-Jan-07 23:16 
GeneralRe: Installation? PinmemberUrs Enzler3-Jan-07 23:24 
Generalexcellent, but a few suggestions [modified] Pinmembersyzygyfire28-Dec-06 5:17 
GeneralRe: excellent, but a few suggestions PinmemberOsama Abbas28-Dec-06 21:11 
GeneralRe: excellent, but a few suggestions Pinmembersyzygyfire2-Jan-07 0:08 
GeneralRe: excellent, but a few suggestions Pinmembersyzygyfire2-Jan-07 0:39 
GeneralRe: excellent, but a few suggestions PinmemberOsama Abbas2-Jan-07 19:45 
GeneralRe: excellent, but a few suggestions PinmemberJohn Mills2-Jan-07 9:48 
Questionhow about adding copy+paste to grid? PinmemberDieg26-Dec-06 2:22 
AnswerRe: how about adding copy+paste to grid? PinmemberOsama Abbas27-Dec-06 18:03 
Question"Typed DataSet support (planned)" - when ?? Pinmembermarcin.rawicki2-Nov-06 1:35 
AnswerRe: "Typed DataSet support (planned)" - when ?? PinmemberOsama Abbas2-Nov-06 1:49 
GeneralRe: "Typed DataSet support (planned)" - when ?? Pinmembermarcin.rawicki2-Nov-06 2:12 
QuestionCustom filter not implemented? PinmemberKarel Kral31-Oct-06 22:36 
AnswerRe: Custom filter not implemented? PinmemberOsama Abbas31-Oct-06 23:35 
QuestionPassword for solution? Pinmemberwurakeem31-Oct-06 11:39 
AnswerRe: Password for solution? PinmemberOsama Abbas31-Oct-06 19:48 
GeneralNice work... Pinmemberfadee31-Oct-06 2:32 
GeneralRequest Pinmembermsmits30-Oct-06 21:30 
GeneralRe: Request PinmemberOsama Abbas30-Oct-06 21:50 

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