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Cross-Language Demo

Cross-Language Demo. Demonstrates mixing C# and VB.NET code C# Class CSDemoClass.cs VB.NET Class VBDemoClass.vb “Main” class (C#) Demo.cs. CSDemoClass.cs. using System; namespace CSDemo { public class CSDemoClass { … protected String getDateTime() {

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Cross-Language Demo

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  1. Cross-Language Demo • Demonstrates mixing C# and VB.NET code • C# Class • CSDemoClass.cs • VB.NET Class • VBDemoClass.vb • “Main” class (C#) • Demo.cs

  2. CSDemoClass.cs using System; namespace CSDemo { public class CSDemoClass { … protected String getDateTime(){ return DateTime.Now.ToString(); } } }

  3. VBDemoClass.vb Public Class VBDemoClass Public Sub ShowTime(ByVal time as String) MsgBox(time, MsgBoxStyle.Information, “VB MsgBox”) End Sub End Class

  4. Demo.cs using System; using CSDemo; using VBDemo; namespace Demo { class Demo { static void Main(string[] args) { String date; CSDemoClass csApp = new CSDemoClass(); VBDemoClass vbApp = new VBDemoClass(); date = csApp.getTime(); vbApp.ShowTime(date); } } }

  5. Cross-Language Example

  6. Using .NET Jiunwei Chen

  7. ASP.NET • Evolution of ASP (Active Server Pages) • Traditional web scripting language • Features • Use any .NET language (C#, VB, COBOL, etc) • Compiled and executed in native machine code • Allows for code-behind • Objected-oriented web development environment • Web Forms and Web Services

  8. Managed Process ASP.NET Hosting the .NET Framework CLR Web form and custom application objects ASP.NET in Context Web Server Network Browser-Client Request and post-back form information HTML representation of application UI

  9. Code Behind • Separation of the HTML and the code • Markup resides in an .ASPX file • Code lies in a C# (.CS) file or managed assembly (.DLL) • ASP.NET • Class is derived from System.Web.UI.Page • HTML is generated and sent to the browser

  10. Time.aspx <% @Page Language="C#" Inherits=“TimePage" Src=“Time.cs" %> <html> <body> <TITLE>Time Page</TITLE> <H1 align="center"> The time is <% OutputTime();%> </H1> </body> </html>

  11. Time.cs using System; using System.Web.UI; public class TimePage:Page{ protected void OutputTime(){ Response.Write( DateTime.Now.ToString(“T")); } }

  12. Time Example

  13. Web Forms • Core of ASP.NET • Separates interface from code logic (View / Model) • ASP.NET detects browser and chooses rendering • Server-side controls • Can use visual tools to layout controls • Similar to VB, JavaBeans, WebObjects

  14. WebControls.aspx <% @Page Language="C#" Inherits="DatePage" … %> <html> ... <Form method="post" runat="server"> ... <asp:Calendar id="calendar" runat="server"> </asp:Calendar> <asp:TextBox id="date" runat="server"/><br> <asp:Button id="button" Text=“Submit" runat="server"></asp:Button> ...

  15. Web Controls Example

  16. XML Web Services • Small, re-usable application components shared over the Web as services • XML • data representation • HTTP • transport protocol • SOAP (Simple Object Access Protocol) • RPC (Remote Procedure Call) standard

  17. Managed Process ASP.NET Hosting the .NET Framework CLR XML Web Service objects XML Web Services Web Server Network Service-Client SOAP MethodRequest SOAP MethodResponse

  18. Why use XML Web Services? • Faster Development • Use any .NET language • XML naturally separates data from view • “.NET My Services” provides core functions (user authentication, etc.) • Greater Reliability • Harness all the benefits of the CLR • Integration • Built off XML and SOAP

  19. References • Clark, Jason, .NET Tutorials, 2001 (Accessible at www.devhood.com) • Microsoft Corporation, Microsoft.NET, http://www.microsoft.com/net/, 2002

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