How do I connect and retrieve data from SAP in C#?

I need to create a web application in C#. I need to retrieve data from SAP.

I know there are several way to do this and I have heard of the SAP data connector for .Net. Is this the recommended way to access data from SAP in C# or are there a better approach?

I have no knowledge of SAP. What are the other things I need to get started retrieving the data aside from installing the .net. In sql server we need connection string like user name and password. Is this the same with connection strings for SAP?

Thanks in advance.
stylelyfAsked:
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Randy DownsOWNERCommented:
Maybe this will help.

example uses the function module RFC_CUSTOMER_GET, which requires that customer data exist in the target SAP System, for example, in IDES.

Connect Code
private void btnSearch_Click(object sender, System.EventArgs e)
  {
// Declare parameters here
SAPProxy1 proxy = new SAPProxy1();
try
{
proxy.Connection = SAP.Connector.SAPLoginProvider.GetSAPConnection(this);
// Call methods here
proxy.Rfc_Customer_Get("", txtCust.Text, ref brfcknA1Table1);
// Now update Data Bindings. On WinForms this will be automatic, on  // WebForms call the following line
this.DataBind();
}
catch(Exception ex)
 {
// If SAPLoginProvider.GetSAPConnection(this) cannot get a connection, // we might get an error.
// Normally this can be ignored as it will automatically will force a // relogon.
}
}

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käµfm³d 👽Commented:
There's a way to expose SAP functions via web services, but unfortunately I cannot remember the method (it's been too many years since I've worked with it). Last I recall, the web service bit was an additional component that you needed to have alongside your SAP instance; then it was just a few clicks through the tool to set up the function as a SOAP service. It's probably buried in their documentation somewhere.
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