Hi,
Could anyone tell me,how to create webservice and how to use it?..Plz explain it with simple program..

Hi Poornima,

To create a new webservice:

File --- > New --- > Website ---- > ASP.NET Webservice.

Create a function in the webservice .

Ex :

[webmethod]
public int Sum(int a, int b)
{
return a+b;
}

__________________
S.Balasubramanian
Nothing is impossible

Advantages of Web Service :

Web Service messages are formatted as XML, a standard way for communication between two incompatible system. And this message is sent via HTTP, so that they can reach to any machine on the internet without being blocked by firewall.

__________________
S.Balasubramanian
Nothing is impossible

Hi balu,

How can we call this web service function in another web page?
Please narrate it with an example.

Hi,
Thanks for ur post...
Shall v able to use xml file and do process and then return in the form of dataTable?Is it possible to do it using Webservice?

Hi kirubananth,
U can call webservice from aspx page code-behind


Suppose in Webservice named WebServiceDemo.cs,
You are having the methods like,


[webmethod]
public int add(int a,int b)
{
int c;
c=a+b;
return c;
}

[webmethod]
public string myWorld()
{
return "Hai DotNet Guys";
}

After u including these methods,
RightClick over the solution->Add WebReference->Start Browsing for Web Services->Web services in this solution->
Services Project URL
WebServiceDemo D:\...\WebServiceDemo\ WebServiceDemo.asmx

The following operations are supported. For a formal definition, please review the Service Description.

*add
*myWorld

Click over add,then it will ask the parameters to u,

Test
To test the operation using the HTTP POST protocol, click the 'Invoke' button.
Parameter Value
a: 5
b: 6

Invoke->Button

After u click invoke,U will get the result like this
<?xml version="1.0" encoding="utf-8" ?>
<int xmlns="http://tempuri.org/">11</int>

From the above one '11' is the answer u get.

To call this in Code-Behind

Default.aspx.cs

protected void addButton_Click(object sender,EventArgs e)
{
WebServiceDemo webServiceDemo=new WebServiceDemo();
demoTextBox1.Text=webServiceDemo.add(5,6).ToString ();
}

Thats all, now u will get the resultant value in the textbox in ur aspx page by clicking Add button in ur aspx page.

Thank you poornima,

I really learned more from your post. I have a doubt.

What is the difference between the ordinary mehod and the method from the webservice?

Hi kirubananth,
If u r using ordinary method either u can use that method in a web Page or within ur project.But if u use web Method u can use that web method any where in ur project and u can use that web method in various projects if it is necessary..This s d differece.R u clear?