return value async webservice

Introductory questions:

ASMX
Framework 4.0

If you are going against a classic .asmx web service, then it should have auto-generated async methods in the proxy that it generated, so you could do something like this:

 	 Private supplier As New BookSupplier.WebService()

        Public Sub GetBookCost(ByVal bookName As String)

	   AddHandler supplier.GetCostCompleted AddressOf supplier_GetCostCompleted

	   supplier.GetCostAsync(bookName)

        End Sub

       Private Sub supplier1_GetCostCompleted(sender As Object, e As BookSupplier.GetCostCompletedEventArgs)
	   If e.Error IsNot Nothing Then
		Throw e.Error
	   End If
    	   Dim cost As Decimal = TryCast(e.UserState, Decimal)
	   costLabel.Text = "Quote from Book Supplier: " & cost
        End Sub

Select allOpen in new window

They did not get auto generated as I think this is not longer the default.
Can you please show what I need to add.

Can you show me the code for the auto-generated proxy?

How did you add the web service reference?

I don't think VS2013 adds these anymore ?

Here is an example of a classic web service reference:

     public void EchoMessageServiceAsync(string MessageID, string Destination, string Touchpoint, string Location, string Style, string ProductionFlag) {
            this.EchoMessageServiceAsync(MessageID, Destination, Touchpoint, Location, Style, ProductionFlag, null);
        }
       
        /// <remarks/>
        public void EchoMessageServiceAsync(string MessageID, string Destination, string Touchpoint, string Location, string Style, string ProductionFlag, object userState) {
            if ((this.EchoMessageServiceOperationCompleted == null)) {
                this.EchoMessageServiceOperationCompleted = new System.Threading.SendOrPostCallback(this.OnEchoMessageServiceOperationCompleted);
            }

Use the following steps:


This will allow you to add a web service reference the old, classic way.

It is the async methods in the webservice that are not being created.
Do you have VB code to show how these can be added ?