Re: How to make an asynchronous call to a web service in vb.net framework 3.5 - Visual Basic Discussion Boards

that is exactly what i do not know how to do? Any idea apart from killing excel.

try this
just kill the excel process from the task manager, from your application.

use this below code.

Public Sub Kill_Application(ByVal ApplicationName As String)
Try
Try
Dim processList1() As Process
processList1 = Process.GetProcessesByName(ApplicationName)
For Each proc As Process In processList1
proc.Kill()
Next
Catch
End Try
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub

Rajesh B --> A Poor Workman Blames His Tools <--

Thanks a lot, it works

the only issue with this is it will close all the instances of excel, which means if the user is working on any Excel sheet apart from our application it will also get closed. Is there a way out?

Regards
Nishkarsh

below code will help u

first get your application process id into a global variable.
then kill that particular process only.if it is have another instance.

Private Sub testingkill()
Dim procid As Integer
procid = Shell("calc", AppWinStyle.NormalFocus) ' Activate the Calculator application.
Try
Try
Dim processList1() As Process
processList1 = Process.GetProcesses
For Each proc As Process In processList1
If proc.Id = procid Then
proc.Kill()
Exit Sub
End If
Next
Catch
End Try
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
Cool | :cool:

Rajesh B --> A Poor Workman Blames His Tools <--

Let this be the webmethod:

<br />
    <webmethod()> _<br />
    Public Function HelloWorld() As String<br />
        Return "Hello World"<br />
    End Function<br />

I have a test harness which is a windows form and I would like to send a request and receive a repsonse asynchronoulsy. Please help me with the code asap.

Thank you

dreddy7 wrote:
the code asap

Not the way it works around here.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

Sorry I did not understand!

People don't just hand over code when someone needs it urgently or right away.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

I am not asking people to do it right away keeping their work aside. People who cant help need not bother at all and better be off. I am asking only those who have already worked on it and who can guide me in the right direction.

dreddy7 wrote:
I am asking only those who have already worked on it and who can guide me in the right direction.

I did some web services stuff the other day, investigating how to consume web services through a silverlight app.

Have you made a reference to the web service in your project?

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

I have added it as the web reference to my windows app project and created an instance of it to call the web methods.

Ok. What code have you done in your windows app to create the instance and method call? Sounds like you are so far on the right track.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

This may be silly, but do you have the web service running?

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

Yeah the web service is running...I am actually new to web services. So, is there any way to confirm if it is actually running or not. And the code that I have on my Windows app is a simple one for now.

On a button click event , it just says:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Cool is the name of my webservice
Dim objService as New Cool.Service
TextBox1.Text = objService.HelloWorld()
end sub

And the web method in the Cool Service is:
<webmethod()> _
Public Function HelloWorld() As String
Return "Hello World"
End Function

Now what is an asynchronous web request-response? I have the following method which does a httpwebrequest-httpwebresponse:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim myHttpWebRequest As HttpWebRequest
Dim myHttpWebResponse As HttpWebResponse
Dim receiveStream As Stream
Dim encode As Encoding
Dim sr As IO.StreamReader
Dim strUrl As String = "http://localhost:5404/CoolService/Service.asmx"

Try
myHttpWebRequest = CType(WebRequest.Create(strUrl), HttpWebRequest)
myHttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
receiveStream = myHttpWebResponse.GetResponseStream()
encode = System.Text.Encoding.GetEncoding("utf-8")
sr = New StreamReader(receiveStream, encode)

Do Until sr.Peek = -1
TextBox2.Text += sr.ReadLine
Loop
Catch ex As System.Net.WebException
MsgBox(ex.Message)
Finally
sr.Close()
myHttpWebResponse.Close()
End Try
End Sub

Is this asynchronous?

dreddy7 wrote:
.I am actually new to web services.

Same here, and have picked up on it relatively quickly. For future reference, put your code inside the code block or inline code tags at the bottom of the reply form. It makes it easier to read Cool | :cool:

dreddy7 wrote:
the code that I have on my Windows app is a simple one for now.

At least you are not dealing with passing xml right now like I am trying to do. My case works sort of okay but even though I am returning XmlDocument, my test app is looking for XmlElement. Now, set aside my banter, back to your problem....

Dim strUrl As String = "http://localhost:5404/CoolService/Service.asmx", I took out CoolService, and left it as Dim strUrl As String = "http://localhost:5404/Service.asmx" and it looks like it worked. Suspicious | :suss:

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

Wow...thats great! Actually I need to pass an xmlDoc and receive an ID in response to it from the webservice. But what I am thinking is, if I get this simple one to work...we can definetely replace the strings with whatever we want. Am I making sense?
Can you please discuss more on making asynchronous calls? Smile | :)

dreddy7 wrote:
Actually I need to pass an xmlDoc and receive an ID in response to it from the webservice.

It's not that tough actually.

dreddy7 wrote:
Can you please discuss more on making asynchronous calls?

I've stuck with just invoking the method, here is what I've done, minus any client intellectual property...

<webmethod()> _
    Public Function GetContact(ByVal contactID As Integer) As XmlDocument
        Dim ContactDataSet As New ContactDataSet
        Dim ContactDataAdapter As New ContactDataSetTableAdapters.ContactTableAdapter

        ContactDataAdapter.FillByID(ContactDataSet.ContactTable, contactID)

        Dim memStream As New System.IO.MemoryStream
        Dim xml As New XmlTextWriter(memStream, System.Text.Encoding.UTF8)
        ContactDataSet.ContactTable.WriteXml(xml)

        Dim myXDoc As New XmlDocument()
        memStream.Flush()
        memStream.Position = 0
        myXDoc.Load(memStream)
        Return myXDoc
    End Function

It very happily gags up the correct data.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

Here is a Google search [^] I am going to look through.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

Well, disregard my latest post, it only gave back the entire http response. You may have to hand pick out the returned value out of the http response, perhaps through regular expressions.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

I am automating excel and would like to align the lefts of my VB.NET form and Excel application. Unfortunately, the "left" in Excel is on a different scale than the "left" of the windows forms. I would like to use code like:

Me.Left = oApp.Left

where oApp refers to the Excel application. This, however, fails to left align these windows. I think I'm missing the big picture here. Anyone have any suggestions? Thanks!

- Craig

"That rug really tied the room together."

Yep, you're missing it alright. The Left in the Excel.Application class is not in pixels, but in points. Documentation on Left[^]...

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

I see... So that means there isn't a good way to do what I want to do?

"That rug really tied the room together."

erhmmm converting points to pixels or if it's out of hand using the old fashion GetWindowEx and GetWindowRect from the Win32 API.
An aproximation is 1.3 ... so for let's say 3 points u have about 3,9 pixels.

I didn't say that. It just means you have to use a different method to get the window rectangle. Use the Process class to find the EXCEL process, the get it's MainWindowHandle. You can then use that handle to call Win32's GetWindowRect function (see www.pinvoke.net for examples) to get the Left position in pixels.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Good afternoon!

Currently i'm working with .Net Framework 2.0 SerialPort Class and trying to send a bunch of bytes as a command to obtain data from a remote system.
The GSM connection is well done, but after this connection, i'm sending a command regarding the communication protocol of the remote equipment, but i don't get any kind of response.

Could anyone help me with this? I'm sending the code i've wrote:

Option Explicit On
Option Strict Off

Imports System.IO.Ports

Public Class Form1

Public Delegate Sub StringSubPointer(ByVal Buffer As String)
Dim WithEvents spObject As New SerialPort
Dim Test_Command As Boolean

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Button1.BackColor = Color.Silver
Button2.BackColor = Color.Silver
Button3.BackColor = Color.Silver

With spObject
.PortName = "COM6"
.BaudRate = 9600
.Parity = Parity.None
.DataBits = 8
.StopBits = StopBits.One
.DtrEnable = True
.RtsEnable = True
'.ReadTimeout = 12000
'.NewLine = Chr(13) 'CR - Carriage Return
'.Encoding = System.Text.Encoding.GetEncoding(28591)
End With

End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

If spObject.IsOpen Then

spObject.Close()

End If

Try

spObject.Open()

Catch ex As Exception

MsgBox("It wasn't possible to open your Serial Com Port! Please try again...", MsgBoxStyle.OkOnly, "Warning")
Return

End Try

Try

spObject.Write("+++" + vbCr)
spObject.Write("ATDPhoneNumber" + vbCr)

RichTextBox1.Clear()

RichTextBox1.Text = "Dialing with the Remote System... Please wait for a few seconds..."

Catch ex As Exception

MsgBox("It wasn't possible to connect with the Remote System! Please try again...", MsgBoxStyle.OkOnly, "Warning")
Return

End Try

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Button1.BackColor = Color.Silver
Button2.BackColor = Color.Green

Dim btArray As Byte() = {68, 00, 00, 68, 00, 00, 00, 00, 80, 00, 01, 81, 00, 16}

Try

spObject.Write(btArray, 0, 14)

RichTextBox1.Clear()
RichTextBox1.Text = "Your command has been correctly sent. Please standby for data response..."

Catch ex As Exception

Button2.BackColor = Color.Silver
MsgBox("Sorry, it wasn't possible to send your command. Please try again...", MsgBoxStyle.OkOnly, "Warning")

Return

End Try

End Sub

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

Button1.BackColor = Color.Silver
Button2.BackColor = Color.Silver
Button3.BackColor = Color.Green

RichTextBox1.Clear()
RichTextBox1.Text = "Disconnecting from the Remote System..."

Try

With spObject

.Write("+++" + vbCr)
.Write("ATH0" + vbCr)

End With

Catch ex As Exception

RichTextBox1.AppendText("It wasn't possible to disconnect from the Remote System. Please try again!")
Button3.BackColor = Color.Silver
Return

End Try

Try

With spObject

.Close()

End With

Catch ex As Exception

RichTextBox1.AppendText("It wasn't possible to close your communication port! Please try again.")
Button3.BackColor = Color.Silver
Return

End Try

Try

Me.Close()

Catch ex As Exception

RichTextBox1.Clear()
Button3.BackColor = Color.Silver
RichTextBox1.Text = "It wasn't possible to close this application! Please try again."
Return

End Try

End Sub

Private Sub Receiver(ByVal sender As Object, ByVal e As SerialDataReceivedEventArgs) Handles spObject.DataReceived

Button2.BackColor = Color.Silver

Me.BeginInvoke(New StringSubPointer(AddressOf Display), spObject.ReadLine)

End Sub

Private Sub Display(ByVal Buffer As String)

RichTextBox1.AppendText(Buffer)

End Sub

End Class

Best Regards.