Tips in debugging dependency property problem?

Tips in debugging dependency property problem?

• ANDYPLIRA

  Tom and Vishal:

  I took the example Vishal put together and it does 'work' for me as well under Beta 2. The only problem is when I run it under the debugger and observe the Debug output window. There are messages like this:

  A first chance exception of type 'System.FormatException' occurred in mscorlib.dll.

  If I check the Thrown exceptions for 'Common Language Runtime Exceptions', then the debugger breaks when trying to evaluate the get for MyString property. There are other times when this exception is thrown too, in the example provided by Vishal.

  Perhaps I'm being unreasonable, as these are all first chance exceptions

  Notre

  
  

• GregVance

  What build of Windows Workflow Foundation are you running this on

  Make sure that the table name and column name are correct in your binding. I have a pared down example attached that does the same and works fine on Beta2.2 version of the product.

  TestActivity.cs:

  using System;
  using System.ComponentModel;
  using System.ComponentModel.Design;
  using System.Collections;
  using System.Drawing;
  using System.Workflow.ComponentModel;
  using System.Workflow.ComponentModel.Design;
  using System.Workflow.ComponentModel.Compiler;
  using System.Workflow.ComponentModel.Serialization;
  using System.Workflow.Runtime;
  using System.Workflow.Activities;
  using System.Workflow.Activities.Rules;

  namespace DataSetBinding
  {
  public partial class TestActivity : Activity
  {
  public TestActivity()
  {
  InitializeComponent();
  }

  public static DependencyProperty MyStringProperty = System.Workflow.ComponentModel.DependencyProperty.Register("MyString", typeof(object), typeof(TestActivity));

  [Description("String Property")]
  [Category("Misc.")]
  [Browsable(true)]
  [DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
  public object MyString
  {
  get
  {
  return (base.GetValue(TestActivity.MyStringProperty));
  }
  set
  {
  base.SetValue(TestActivity.MyStringProperty, value);
  }
  }

  protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
  {
  Console.WriteLine(MyString as string);
  return ActivityExecutionStatus.Closed;
  }

  
  }
  }
  

  TestActivity.designer.cs

  using System;
  using System.ComponentModel;
  using System.ComponentModel.Design;
  using System.Collections;
  using System.Drawing;
  using System.Reflection;
  using System.Workflow.ComponentModel;
  using System.Workflow.ComponentModel.Design;
  using System.Workflow.ComponentModel.Compiler;
  using System.Workflow.ComponentModel.Serialization;
  using System.Workflow.Runtime;
  using System.Workflow.Activities;
  using System.Workflow.Activities.Rules;

  namespace DataSetBinding
  {
  public partial class TestActivity
  {
  #region Designer generated code
  
  /// <summary>
  /// Required method for Designer support - do not modify
  /// the contents of this method with the code editor.
  /// </summary>
  [System.Diagnostics.DebuggerNonUserCode]
  private void InitializeComponent()
  {
  //
  // TestActivity
  //
  this.Name = "TestActivity";

  }

  #endregion
  }
  }
  

  Workflow1.cs

  using System;
  using System.ComponentModel;
  using System.ComponentModel.Design;
  using System.Collections;
  using System.Drawing;
  using System.Workflow.ComponentModel.Compiler;
  using System.Workflow.ComponentModel.Serialization;
  using System.Workflow.ComponentModel;
  using System.Workflow.ComponentModel.Design;
  using System.Workflow.Runtime;
  using System.Workflow.Activities;
  using System.Workflow.Activities.Rules;
  using System.Data;

  namespace DataSetBinding
  {
  public sealed partial class Workflow1: SequentialWorkflowActivity
  {
  public DataSet dataSetObject;
  public Workflow1()
  {
  InitializeComponent();
  dataSetObject = new DataSet("TestDataSet");
  dataSetObject.Tables.Add("TestTable");
  dataSetObject.Tables["TestTable"].Columns.Add("TestColumn");
  dataSetObject.Tables["TestTable"].Columns["TestColumn"].DataType = typeof(string);
  dataSetObject.Tables["TestTable"].Rows.Add(new object[] { "Hello World" });
  }
  }

  }
  

  Workflow1.designer.cs

  using System;
  using System.ComponentModel;
  using System.ComponentModel.Design;
  using System.Collections;
  using System.Drawing;
  using System.Reflection;
  using System.Workflow.ComponentModel.Compiler;
  using System.Workflow.ComponentModel.Serialization;
  using System.Workflow.ComponentModel;
  using System.Workflow.ComponentModel.Design;
  using System.Workflow.Runtime;
  using System.Workflow.Activities;
  using System.Workflow.Activities.Rules;

  namespace DataSetBinding
  {
  partial class Workflow1
  {
  #region Designer generated code
  
  /// <summary>
  /// Required method for Designer support - do not modify
  /// the contents of this method with the code editor.
  /// </summary>
  [System.Diagnostics.DebuggerNonUserCode]
  private void InitializeComponent()
  {
  this.CanModifyActivities = true;
  System.Workflow.ComponentModel.ActivityBind activitybind1 = new System.Workflow.ComponentModel.ActivityBind();
  this.testActivity1 = new DataSetBinding.TestActivity();
  //
  // testActivity1
  //
  activitybind1.Name = "Workflow1";
  //activitybind1.Path = "dataSetObject.Tables[\"TestTable\"].Rows[0].ItemArray[0]";
  activitybind1.Path = "dataSetObject.Tables[\"TestTable\"].Rows[0][\"TestColumn\"]";
  this.testActivity1.Name = "testActivity1";
  this.testActivity1.SetBinding(DataSetBinding.TestActivity.MyStringProperty, ((System.Workflow.ComponentModel.ActivityBind)(activitybind1)));
  //
  // Workflow1
  //
  this.Activities.Add(this.testActivity1);
  this.Name = "Workflow1";
  this.CanModifyActivities = false;

  }

  #endregion

  private TestActivity testActivity1;

  }
  }
  

  
  
  

• PKH

  Hi Vishal,

  I'm using Beta2. Maybe this will work when I upgrade to Beta 2.2. I'm pretty sure that table and column names are correct in my binding.

  Notre

  
  

• BLOX

  The example Vishal put together works on Beta 2 also.
  
  
• Tips in debugging dependency property problem?