Re: Passing custom object to web service - Visual Basic Discussion Boards

I am adding a web reference to it.
I have removed it, recompiled the service and added it again and still has the same problem.

Well I have managed to achieve what I want to but in a pretty crude way.
I have written a function to serialize a class and one to deserialize it.
Like this -

        Public Function Object2XML(ByVal obj As Object) As String<br />
            Dim SW As New StringWriter<br />
            Dim Ser As New XmlSerializer(obj.GetType())<br />
            Try<br />
                Ser.Serialize(SW, obj)<br />
                Return SW.ToString<br />
            Catch ex As Exception<br />
                Throw ex<br />
            End Try<br />
        End Function<br />
<br />
    Public Function XML2OBject(ByVal xml As String, ByVal Type As Type) As Object<br />
        Dim Obj As New Object<br />
        Dim SR As New StringReader(xml)<br />
        Dim Serializer As New System.Xml.Serialization.XmlSerializer(Type)<br />
        Try<br />
            Return Serializer.Deserialize(SR)<br />
        Catch ex As Exception<br />
            Throw ex<br />
        End Try<br />
    End Function

But surely there is a better way to do it than this?

if you want, you can email your solution and I can take a quick look (strip out any unnecessary code)

Thats a very kind offer but It is as very large project and I can't strip it easily.
Don't think my boss would appreciate me sending you the whole of our site.
Thanks anyway.

Have you managed to pass a custom class to a web service before successfully?

yes we do it all the time. we do not however use web references (not that I think that's the problem). we go after the webservice dynamically...

How do you go after the webservice dynamically as you put it?

let me put a quick sample together...

example:

include system.web.services in your exe project
make the webservice (if not already) a virtual directory

the line - Me.Url = "http://localhost/cpwebproj/PopulateMyObj.asmx"
allows you to change localhost to any ip/dns name

hope this helps...

********this goes in your dll***********

<Serializable()> _
Public Class MyObj
Public sName As String
Public sAddr As String
Public sCity As String
Public sState As String
Public sZip As String
End Class

********this goes in your exe***********
Public Class Form1
Inherits System.Windows.Forms.Form

Private Sub Form1_Load1(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim oEntity As New CPDllProj.MyObj
Dim oTrans As New Trans

oEntity = oTrans.Request(oEntity)

MsgBox(oEntity.sName)
MsgBox(oEntity.sAddr)
MsgBox(oEntity.sCity)
MsgBox(oEntity.sState)
MsgBox(oEntity.sZip)

End
End Sub
end class

Imports System.Web.Services
Imports System.Web.Services.Protocols

<System.Diagnostics.DebuggerStepThroughAttribute(), _
System.ComponentModel.DesignerCategoryAttribute("code"), _
System.Web.Services.WebServiceBindingAttribute(Name:="CPHandlerSoap", [Namespace]:="CPWebProj/PopulateMyObj")> _
Public Class Trans
Inherits System.Web.Services.Protocols.SoapHttpClientProtocol

<System.Web.Services.Protocols.SoapDocumentMethodAttribute("CPWebProj/PopulateMyObj/Request", _
RequestNamespace:="CPWebProj/PopulateMyObj", _
ResponseNamespace:="CPWebProj/PopulateMyObj", _
Use:=System.Web.Services.Description.SoapBindingUse.Literal, _
ParameterStyle:=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)> _
Public Function Request(ByVal oEntity As CPDllProj.MyObj) As CPDllProj.MyObj
Dim oa() As Object

Me.Url = "http://localhost/cpwebproj/PopulateMyObj.asmx"
Me.Timeout = 60000

oa = Me.Invoke("Request", New Object() {oEntity})
Return CType(oa(0), CPDllProj.MyObj)
End Function
End Class

********this goes in your webservice***********

Imports System.Web.Services

<System.Web.Services.WebService(Namespace:="CPWebProj/PopulateMyObj")> _
Public Class PopulateMyObj
Inherits System.Web.Services.WebService

#Region " Web Services Designer Generated Code "

Public Sub New()
MyBase.New()

'This call is required by the Web Services Designer.
InitializeComponent()

'Add your own initialization code after the InitializeComponent() call

End Sub

'Required by the Web Services Designer
Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Web Services Designer
'It can be modified using the Web Services Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
components = New System.ComponentModel.Container
End Sub

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
'CODEGEN: This procedure is required by the Web Services Designer
'Do not modify it using the code editor.
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

#End Region

<WebMethod(), _
System.Xml.Serialization.XmlInclude(GetType(CPDllProj.MyObj))> _
Public Function Request(ByVal oEntity As CPDllProj.MyObj) As CPDllProj.MyObj
oEntity.sName = "me"
oEntity.sAddr = "123 test st"
oEntity.sCity = "testy town"
oEntity.sState = "IL"
oEntity.sZip = "60000"
Return oEntity
End Function
End Class

Thanks very much for your help.
But i'm afraid you've got a bit beyond me there.

maybe, maybe not...

do this and I'll show you how I got the code I sent:

+add a webrefence to your asmx page.
+right-click on the new reference and left-click on view in object browser
+expand the plus
+right-click on your class name
+left-click on goto definition

if you look the upper part of the code, its your routine name showing it's pointing to localhost. this is the code I sent you...

"+add a webrefence to your asmx page."
You mean add a webreference to my web service?
In which case a reference to what?

If you meant add a web reference to my consuming project I have and tried clicking view in browser but it was greyed out.

For some reason view in browser is no longer gereyed out (no idea what I've done).
but there is no option to view in object browser.

in your exe, rightclick on the references and choose add web reference
yes point to your web service

using my example is would look like

http://localhost/cpwebproj/populatemyobj.asmx

not view in browser, view in 'object browser'

The webreference appears as a folder with 3 files inside none of which have an option to view in object browser on right click.

Hi all,

First of all I'll apologise in advance! I'm very new to this and have been trying to learn through books and what I can pick up on the net so I'm hoping someone can help me understand where I'm going wrong with the following...

I've set up a datagrid which works perfectly when I use textboxes, however I'm trying to limit user choice by adding dropdownlists to the datagrid. I get as far as clicking to edit the field and get the following error:

---------------------------
System.IndexOutOfRangeException: StatusID

Source Error:

Line 345:
Line 346: <edititemtemplate>
Line 347: <asp:dropdownlist id="ddlStatusctrl" runat="server"
line="" 348:="" datatextfield="Status" 349:="" datavaluefield="StatusID"
=""
----------------------------

my="" coding="" for="" the="" dropdownlist="" is="" as="" follows:

="" <asp:templatecolumn="">
<headertemplate>
Status

<itemtemplate>
<%# Container.DataItem("Status") %>

<edititemtemplate>
<asp:dropdownlist id="ddlStatusctrl" runat="server"
="" datatextfield="Status" datavaluefield="StatusID" datasource="<%# GetStatus() %>" selectedindex="<%# GetSelectedIndex(Container.DataItem("StatusID")) %>">

and VB code is :

to populate the dataset ('Dim DS as DataSet = New DataSet()' declared globally) ...

Function GetStatus() as DataSet

Dim DBConn as OleDbConnection
Dim DBCommand as OleDbDataAdapter

DBConn = New OleDbConnection("PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=" & Server.MapPath("data/Auto_log.mdb") & ";")
DBCommand = New OleDbDataAdapter("SELECT StatusID, Status from Status ORDER BY Status", DBConn)

DBCommand.Fill(DS, "Status")
DBConn.Close()

Return DS

End Function
----------------
to get selected index -

Function GetSelectedIndex(ByVal StatusID As String) As Integer
'Loop through the DataSet DS
Dim iLoop As Integer
Dim DT As DataTable = DS.Tables("Status")
For iLoop = 0 To DT.Rows.Count - 1
If StatusID = DT.Rows(iLoop)("StatusID").ToString Then
Return iLoop
End If
Next iLoop
End Function
-----------

... & to update the database (cut to show coding related to ddl)-

Sub dg_Update(s As Object, e As DataGridCommandEventArgs)

Dim ddlStatus As DropDownList = FindControl("ddlStatusctrl")

strCmd = "UPDATE AutomationHist SET System=@System, Status=@ddlStatus, ProgramNo=@ProgramNo, VersionNo=@VersionNo, LastJobNo=@LastJobNo, Date_Last_Amended=@Date_Last_AmendedParam, Date_Authorised=@Date_AuthorisedParam, Coded_by=@Coded_by, Location=@Location, Calculation=@Calculation, Writeback=@Writeback, Letter_output=@Letter_output, Exceptions=@Exceptions, Comments=@Comments WHERE Primary_Key=@Primary_Key"

objCmd.Parameters.Add("@ddlStatus", ddlStatus)

objConn.Open()
objCmd.ExecuteNonQuery()
objConn.Close()

dgAutomationHist.EditItemIndex = -1
BindData()
End Sub

------------------

Thanks very much in advance...

Smile | :)

-- modified at 7:21 Thursday 10th May, 2007

-- modified at 7:27 Thursday 10th May, 2007

-- modified at 7:41 Thursday 10th May, 2007

Robster

I have maked this code and it work nice, for me Wink | ;-)

Now i want to exclude fronm column ordering the filed named "DATA_AGG" how to?
here the mdb in access:www.mytempdir.com/1323897

Option Explicit
Sub ORDER_FILEDS()

Dim DATABASE As DAO.DATABASE
Dim TABELLA As DAO.TableDef
Dim CAMPO_TEMP As DAO.Field
Dim POSIZIONE() As Integer
Dim CAMPO_NOME() As String
Dim INT_TEMP As Integer

Set DATABASE = OpenDatabase("\\GCD01F4500\DATI\PUBBLICA\ANTIRIC\OPERATORI.MDB")
Set TABELLA = DATABASE.TableDefs("TEST")

With TABELLA

ReDim POSIZIONE(0 To .Fields.Count - 1) As Integer
ReDim CAMPO_NOME(0 To .Fields.Count - 1) As String

For INT_TEMP = 0 To .Fields.Count - 1
POSIZIONE(INT_TEMP) = .Fields(INT_TEMP).OrdinalPosition
CAMPO_NOME(INT_TEMP) = .Fields(INT_TEMP).Name
Next INT_TEMP

For Each CAMPO_TEMP In .Fields
CAMPO_TEMP.OrdinalPosition = 1
Next CAMPO_TEMP

End With

DATABASE.Close

End Sub

because you are no longer dealing with a 1 to 1, you need to use a different varaible for the posizione and camp_nome.

dim INT_ACC as integer = 0

For INT_TEMP = 0 To .Fields.Count - 1
If .Fields(INT_TEMP).Name <> "DATA_AGG" Then
POSIZIONE(INT_ACC) = .Fields(INT_TEMP).OrdinalPosition
CAMPO_NOME(INT_ACC) = .Fields(INT_TEMP).Name
INT_ACC = INT_ACC + 1
End If
Next INT_TEMP

When i minimize my application then i want it to hide as i have a tray icon and then i can open it from there
But i am not able to catch form's Minimize button event

How can i minimize the form(hide)

Public Class MinimizeInTray<br />
    Public TrayMenu As New ContextMenu<br />
    Public Restorewindowstate As FormWindowState = <br />
FormWindowState.Normal<br />
    Public trayicon As New NotifyIcon<br />
    Public mainform As New Form<br />
    Public visible As Boolean = False<br />
    Sub New(ByVal form As Form, Optional ByVal icontext As String = "", <br />
Optional ByVal icon As Icon = Nothing)<br />
        TrayMenu.MenuItems.Clear()<br />
        mainform = form<br />
        TrayMenu.MenuItems.Add("Restore", AddressOf restore)<br />
        TrayMenu.MenuItems.Add("Close", AddressOf close)<br />
        AddHandler trayicon.DoubleClick, AddressOf restore<br />
        With trayicon<br />
            .Visible = False<br />
            If IsNothing(icon) Then<br />
                .Icon = mainform.Icon<br />
            Else<br />
                .Icon = icon<br />
            End If<br />
            .Text = icontext<br />
            .ContextMenu = TrayMenu<br />
        End With<br />
    End Sub<br />
    Private Sub restore(ByVal sender As System.Object, ByVal e As <br />
System.EventArgs)<br />
        mainform.ShowInTaskbar = True<br />
        visible = True<br />
        trayicon.Visible = False<br />
        mainform.WindowState = Restorewindowstate<br />
    End Sub<br />
    Private Sub close(ByVal sender As System.Object, ByVal e As <br />
System.EventArgs)<br />
        trayicon.Visible = False<br />
        mainform.Close()<br />
    End Sub<br />
End Class

Thanks for the code but what i want is something like outlook.
if i minimize my form then it should not be visible.

Not only minimize from tray icon but also from minimize button of the form to.

I think same code should work .
just add a button to the form which indiacates the minimize sign.
and put the code on that i same send.

write your code on form_resize event
check for form.windowstate = FormWindowState.Minimized and write your code to hide your form and show systemtray icon

Vilsad P P
MCTS (Windows Applications) .Net 2.0

Here is an article I wrote on this subject including balloon tips.
http://www.codeproject.com/dotnet/notifyiconcontrol20.asp[^]

Hope that helps.
Ben

Thank You Sir, It is very nice and useful Article.

workflow is the operational aspect of a work procedure: how tasks are structured, who performs them, what their relative order is, how they are synchronized, how information flows to support the tasks (wordflow) and how tasks are being tracked. As the dimension of time is considered in workflow, workflow considers "throughput" as a distinct

1.shall we develop work flow using using class library from vs.net 2.0
(vb.net)?
2.we need any dedicated language like XPDL for process defination, and link
the process and task ?

please answer to the above questions if you have.

with best Regard's
s.a.Rahman