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From: Gilbert Tordeur on 12 Jul 2010 09:54
Hello.

In order to learn WF4 I have read "A Developer's Introduction to Windows
Workflow Foundation (WF) in .NET 4"
(http://msdn.microsoft.com/en-us/library/ee342461.aspx). Unfortunately it is
in C# while my preferred language is VB. So I try to translate.

The first example is the following:

[TestMethod]
public void TestHelloWorldStatic()
{
StringWriter Sw = new StringWriter();
Console.SetOut(Sw);
Sequence Wf = new Sequence
{
Variables =
{
new Variable<string>{Default = "Hello", Name =
"greeting"},
new Variable<string>{Default = "Bill", Name = "name"}
},
Activities =
{
new WriteLine {Text = new
VisualBasicValue<string>("greeting")},
new WriteLine {Text = new VisualBasicValue<string>("name
& \"Gates\"")}
}
};
WorkflowInvoker.Invoke(Wf);
Assert.IsTrue(String.Compare("Hello\r\nWorld\r\n",
Sw.GetStringBuilder().ToString()) == 0, "Incorrect string written");
}
which compiles without any flag.

I translate it into VB:

<TestMethod()>
Public Sub TestMethod1()
Dim Sw = New StringWriter
Console.SetOut(Sw)
Dim Wf As Sequence = New Sequence With { _
.Activities = { _
New WriteLine With { _
.Text = "Hello" _
} _
, New WriteLine With { _
.Text = "World" _
} _
} _
}

WorkflowInvoker.Invoke(Wf)
Assert.IsTrue(String.Compare("Hello\r\nWorld\r\n",
Sw.GetStringBuilder.ToString) = 0, "Incorrect string written")

End Sub
which compiles with a flag telling that the Activities property is
'ReadOnly' !

Did I make a translation error ?

Thanks for your help,
Gilbert

P.S. and if you know a good introduction to WF4 in VB I will be much
interested.


From: Cor Ligthert[MVP] on 12 Jul 2010 13:28
Tried to answer in the forum, although I could not do much.

"Gilbert Tordeur" <gilbert.tordeur(a)orange.fr> wrote in message
news:eozVOncILHA.4120(a)TK2MSFTNGP02.phx.gbl...
> Hello.
>
> In order to learn WF4 I have read "A Developer's Introduction to Windows
> Workflow Foundation (WF) in .NET 4"
> (http://msdn.microsoft.com/en-us/library/ee342461.aspx). Unfortunately it
> is in C# while my preferred language is VB. So I try to translate.
>
> The first example is the following:
>
> [TestMethod]
> public void TestHelloWorldStatic()
> {
> StringWriter Sw = new StringWriter();
> Console.SetOut(Sw);
> Sequence Wf = new Sequence
> {
> Variables =
> {
> new Variable<string>{Default = "Hello", Name =
> "greeting"},
> new Variable<string>{Default = "Bill", Name = "name"}
> },
> Activities =
> {
> new WriteLine {Text = new
> VisualBasicValue<string>("greeting")},
> new WriteLine {Text = new
> VisualBasicValue<string>("name & \"Gates\"")}
> }
> };
> WorkflowInvoker.Invoke(Wf);
> Assert.IsTrue(String.Compare("Hello\r\nWorld\r\n",
> Sw.GetStringBuilder().ToString()) == 0, "Incorrect string written");
> }
> which compiles without any flag.
>
> I translate it into VB:
>
> <TestMethod()>
> Public Sub TestMethod1()
> Dim Sw = New StringWriter
> Console.SetOut(Sw)
> Dim Wf As Sequence = New Sequence With { _
> .Activities = { _
> New WriteLine With { _
> .Text = "Hello" _
> } _
> , New WriteLine With { _
> .Text = "World" _
> } _
> } _
> }
>
> WorkflowInvoker.Invoke(Wf)
> Assert.IsTrue(String.Compare("Hello\r\nWorld\r\n",
> Sw.GetStringBuilder.ToString) = 0, "Incorrect string written")
>
> End Sub
> which compiles with a flag telling that the Activities property is
> 'ReadOnly' !
>
> Did I make a translation error ?
>
> Thanks for your help,
> Gilbert
>
> P.S. and if you know a good introduction to WF4 in VB I will be much
> interested.
>
>
>
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