Hi,

First Create the database in Sql.

After that create web service in asp.net with c#.

the code is like below.

public class LoginDetails : System.Web.Services.WebService
{
SqlConnection con = new SqlConnection(“Data Source=SourceName;Initial Catalog=DBName;User id=UserName;Password=Password”);
public LoginDetails()
{

//Uncomment the following line if using designed components
//InitializeComponent();
}

// Method to get login records from database
[WebMethod]
public bool GetLoginDetails(string UserName, string Password)
{
// Method not followed any coding standards. This is just for demo purpose

var da = new SqlDataAdapter(“SELECT * from Login where Username =’”+UserName+”‘ and Password=’”+Password+”‘” , con);
var dt = new DataTable();
da.Fill(dt);
if (dt.Rows.Count > 0)
{
return true;
}
else
{
return false;
}
}

}
// Login Class
public class Login
{
public string LoginId = string.Empty;
public string UserName = string.Empty;
public string Password = string.Empty;
}

After creating service just put the reference of that service in that .net application.

flex Code:-

<?xml version=”1.0″ encoding=”utf-8″?>
<mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml” layout=”absolute” creationComplete=”init()”>

<mx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.core.mx_internal;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;

private function LoginUser(event:MouseEvent):void {
ws.GetLoginDetails(txtUserName.text, txtPassword.text);
}
private function GetLoginDetails(event:ResultEvent):void {
// Save a record using a WebService method

if(event.result == 1)
{
Alert.show("login successful");
}
else
{
Alert.show("login unsucessful");
}
}
private function fault(event:FaultEvent):void {
// Oppps some error occured
Alert.show(event.toString());
}

]]>
</mx:Script>

<!– WebService definition –>
<mx:WebService id=”ws” wsdl=”http://localhost:6030/TestWebService/LoginDetails.asmx?wsdl” fault=”fault(event)”>
<mx:operation
name=”GetLoginDetails”
resultFormat=”object”
result=”GetLoginDetails(event)”
/>
</mx:WebService>

<mx:Panel x=”331.5″ y=”166″ width=”270″ height=”150″ layout=”absolute” title=”ASP.NET WebService + Flex Login Demo”>
<mx:HBox height=”95%” width=”95%” horizontalCenter=”0″ verticalCenter=”0″>
<mx:Form x=”100″ y=”100″ width=”100%” height=”100%” borderStyle=”solid”>
<mx:FormItem label=”UserName”>
<mx:TextInput width=”106″ id=”txtUserName”/>
</mx:FormItem>
<mx:FormItem label=”Password”>
<mx:TextInput width=”106″ id=”txtPassword”/>
</mx:FormItem>
<mx:FormItem width=”156″ horizontalAlign=”right”>
<mx:Button label=”Login” id=”btnLogin” click=”LoginUser(event)”/>
</mx:FormItem>
</mx:Form>
</mx:HBox>
</mx:Panel>

</mx:Application>

In the above code put the service reference URL replacing “http://localhost:6030/TestWebService/LoginDetails.asmx?wsdl“.

and run the application you have below screen.

Now you can have UserName : Test  & Password : Test

Then the screen appears like…

and if you enter Username : OtherTest & Password : Test

The screen appears like…

So, this way you can use asp.net web services in the Flex. For more query and details you can contact me or ask me freely.