NAV Web Services Connectivity Samples
(Many Samples reposted from original Freddy Blog posts)

...best blog posts available "AS TODAY" about Web Services Connectivy & Integration (my opinion!)

Web Services Infrastructure and how to Create an Internal Proxy
http://blogs.msdn.com//b/freddyk/archive/2010/01/30/web-services-infrastructure-and-how-to-create-an-internal-proxy.aspx

Connecting to NAV Web Services from C# using Web Reference
http://blogs.msdn.com/b/freddyk/archive/2010/01/20/connecting-to-nav-web-services-from-c-using-web-reference.aspx

Connecting to NAV Web Services from Visual Basic .net using Web Reference
http://blogs.msdn.com/b/freddyk/archive/2010/01/20/connecting-to-nav-web-services-from-visual-basic-net-using-web-reference.aspx

Connecting to NAV Web Services from Java
http://blogs.msdn.com//b/freddyk/archive/2010/01/19/connecting-to-nav-web-services-from-java.aspx

Connecting to NAV Web Services from the Cloud–Part 1 out of 5
http://blogs.msdn.com/b/freddyk/archive/2010/12/01/connecting-to-nav-web-services-from-the-cloud-part-1-out-of-5.aspx

Connecting to NAV Web Services from Windows Mobile 6.5
http://blogs.msdn.com/b/freddyk/archive/2010/01/25/connecting-to-nav-web-services-from-windows-mobile-6-5.aspx

Extending page Web Services (and creating a Sales Order again)
http://blogs.msdn.com//b/freddyk/archive/2009/11/17/extending-page-web-services-and-creating-a-sales-order-again.aspx

 
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About the last above... Great post !!!  

Extending page Web Services, "Creating a Sales Order through Web Services"

http://blogs.msdn.com//b/freddyk/archive/2009/11/17/extending-page-web-services-and-creating-a-sales-order-again.aspx

CREATE ORDER
Creating the Order header

Order_Service service = new Order_Service();
service.UseDefaultCredentials = true;

Order order = new Order();
service.Create(ref order);

After this we have a Order Number and an empty order – exactly like leaving the order No. field on the Sales Order Page.
Fill out the Order Header and create the Order lines
In this sample I will just fill out the Sell_to_Customer_No – a number of the other Order Header fields will be auto-updated when updating the order

CREATE ORDER LINES

order.Sell_to_Customer_No = "10000";

Then we need to create the Order lines

in this sample I will create 5. BTW – It is NOT trivial to add an order line after the fact, so I suggest you add the needed number of lines in one go:

order.SalesLines = new Sales_Order_Line[5];
for (int i = 0; i < 5; i++)
    order.SalesLines[i] = new Sales_Order_Line();
service.Update(ref order); 

Fill out the Order lines
In this sample, I will just create 5 lines with green ROME guest chairs.

for (int i = 0; i < 5; i++)
{
    order.SalesLines[i].Type = OrderPageRef.Type.Item;
    order.SalesLines[i].No = "1960-S";
    order.SalesLines[i].Quantity = 1;
}
service.Update(ref order);

That’s it – the order is created and you can find it in the Client.
And at last… – Post the order

Having created the order, now it is time to post the order

service.PostOrder(order.Key);

.....

Great Posts about NAV Web Services by "Freddy Blog"and Great Blog!

by Freddy Kristiansen
PM Architect, Microsoft Dynamics NAV
http://blogs.msdn.com/b/freddyk/