How to create and use a Web Service proxy class

How to create and use a Web Service proxy class

Web service proxy supports. net programming language files, which are automatically generated by the WSDL tool provided by the. net Framework. The proxy class does not contain any application logic. Instead, it contains the transmission logic about how to pass parameters and search results, and a list of methods and prototypes in the Web service. The proxy class can be created from any WSDL file.

You can access the Web service just like accessing a com object. To access the Web service, you must create a proxy class from the Web service's WSDL document on the local computer .. Netmask the tool named wsdl.exe to automatically generate a Proxy file. The creation and use processes are described as follows:

1. Create an asp Application (# C) project named TeachShow. Create a folder named Charpter8 in the TeachShow project and create a new Web service under the folder named: computer. asmx
2. Switch to the code View and write the following code:
[WebMethod (Description = "used for addition", EnableSession = false)]
Public int Add (int a, int B)
{
Return a + B;
}

[WebMethod (Description = "used for subtraction", EnableSession = false)]
Public int Sub (int a, int B)
{
Return a + B;
}

[WebMethod (Description = "used for multiplication", EnableSession = false)]
Public int Multi (int a, int B)
{
Return a * B;
}

[WebMethod (Description = "used for division operations", EnableSession = false)]
Public double Devide (int a, int B)
{
Return Convert. ToDouble (a)/Convert. ToDouble (B );

3. Compile the entire project by pressing F5 (this step must be done, and cannot be implemented without step 1)

4. Open the MS.net 2003 command prompt tool and enter: C:> wsdl http: // localhost/TeachShow/Charpter8/FirstAndUse/Computer. asmx/n: ComputerNameSpace. ComputerNameSpace is a custom namespace. The prompt is as follows: