Re: [DelphiNet-general] Possible topics for sample applications

[Marcus S. <mar...@gm...>]

Hi,

> - Sample for developing Web Services

A specific sample for this topic could be a small environment with a server
that provides the Web Services and a client that utilizes it. A certain
example of use could be the following:


/--------------------------------
Server:
- Database System that can be accessed via .NET (for example Microsoft SQL
Server or MySQL)
- Web Service that provides access to the Database System
- Listener/Wrapper for the Web Service (sorry, but I don't know yet how the
listener is realized in .NET)
--------------------------------/



/--------------------------------
Client:
- .NET-Client for the Web Service that executes some SQL-queries (f.e.:
"SELECT * FROM tbl" etc.)
  via the Web Service
--------------------------------/


So the model for this application would look something like this:

CLIENT:
1. User enters or invokes a SQL statement ... let's say "SELECT * FROM
table1 WHERE (price <= 100)"
2. The client applications submits that statement to the SERVER via the .NET
WebServices-capabilites

SERVER:
3. Web Service listener/wrapper recieves the desired statement and
dispatches it to the actual Web Service application
4. The Web Service application accepts the statement and executes in on the
DBMS
5. The DBMS performs the stated query and passes the results to the Web
Service Application
6. Web Service Application hands over the result set to the CLIENT

CLIENT
7. Result set is received and displayed to the user


cu
-- marcus