Developing an ASP.NET Web Application

Developing an ASP.NET Web Application ,[object Object]

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object]

What is the .NET Framework? Developer Tools Clients User Experiences ASP.NET Web Applications XML Web Services Databases .NET Framework

Benefits of .NET ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The .NET Framework Components Win32 Common Language Runtime .NET Framework Class Library ADO.NET and XML XML Web Services User Interface Visual Basic C++ C# ASP.NET Perl Python … Message Queuing COM+ (Transactions, Partitions, Object Pooling) IIS WMI

The Common Language Runtime ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Using the Class Library ,[object Object],[object Object],[object Object],[object Object],[object Object],using namespace_name ; using System.Web.UI.WebControls; ListBox ListBox1; ListBox1.Items.Add("First Item"); System.Web.UI.WebControls.ListBox ListBox1; ListBox1.Items.Add("First Item");

Multiple Language Support ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Choosing a Language ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ASP Web Application Architecture Presentation Tier Business Logic Tier Data Tier UI Pages (.htm) Graphic Files COM Objects Data Source ADO COM+ Services ASP Page (.asp)

ASP.NET Web Application Architecture Presentation Tier Business Logic Tier Data Tier Graphic Files UI Pages (.htm) XML Web Services (.asmx) User Controls (.ascx) Code-Behind File (.aspx.vb or .aspx.cs) Proxy ADO.NET .NET Objects Data Source COM+ Services COM Objects RCW Web Form (.aspx)

ASP.NET Coding Changes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ASP.NET Runtime Compilation and Execution Native code C# Visual Basic .NET default.aspx Common Language Runtime HTML Which language? Visual Basic .NET compiler C# compiler MSIL JIT compiler

Multimedia: ASP.NET Execution Model

Demonstration: Developing an ASP.NET Web Application ,[object Object],[object Object],[object Object],[object Object]

What Is a Web Form? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<%@ Page Language="C#" Inherits=Project.WebForm1 %> <html> <body ms_positioning="GridLayout"> <form id="Form1" method="post" runat="server" > </form> </body> </html>

What is a Server Control? ,[object Object],[object Object],[object Object],[object Object],<asp:Button id="Button1" runat="server" Text="Submit"/> private void btn_Click(object sender, System.EventArgs e) { lblName.Text = txtName.Text; }

Types of Server Controls ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<input name="TextBox1" type="text" value="Text_to_Display" Id="TextBox1"/> <asp:TextBox id="TextBox1" runat="server">Text_to_Display </asp:TextBox> <input type="text" id="txtName" runat="server" />

Maintaining the State of ASP.NET Server Controls ,[object Object],[object Object],<form id="Form1" method="post" runat="server"> <input type="hidden" name="__VIEWSTATE" value="dDw3NzE0MTExODQ7Oz4=" /> 'HTML here </form> ,[object Object],<%@ Page EnableViewState="False" %> <asp:ListBox id="ListName" EnableViewState="true" runat="server"> </asp:ListBox>

Demonstration: Using Server Controls to a Web Form ,[object Object],[object Object]

Selecting the Appropriate Control You need specific functionality such as a calendar or ad rotator The control will interact with client and server script You are writing a page that might be used by a variety of browsers You are working with existing HTML pages and want to quickly add ASP.NET Web page functionality You prefer a Visual Basic-like programming model You prefer an HTML-like object model Use Web Server Controls if: Use HTML Server Controls if: Bandwidth is not a problem Bandwidth is limited

How to Implement Code ,[object Object],[object Object],[object Object],[object Object],[object Object],Form1.aspx Form1.aspx Form1.aspx.vb or Form1.aspx.cs <tags> <tags> code code Separate files Single file Code-Behind Page

Understanding How Code-Behind Pages Work ,[object Object],[object Object],Page1.aspx <% @ Page Language="C#" Inherits="Project.WebForm1" Codebehind="Page1.aspx.cs" Src = "Page1.aspx.cs" %> Page1.aspx.cs namespace Project { public class WebForm1 : System.Web.UI.Page { } }

What are Event Procedures? ,[object Object]

Demonstration: Using Events ,[object Object],[object Object],[object Object],[object Object]

Client-Side Event Procedures Internet .HTM Pages ,[object Object],[object Object],[object Object],[object Object]

Server-Side Event Procedures ,[object Object],[object Object],[object Object],[object Object],Internet .ASPX Pages

Creating Event Procedures ,[object Object],protected System.Web.UI.WebControls.Button btn ; private void InitializeComponent() { this. btn.Click += new System.EventHandler(this. btn_Click ); } private void btn_Click (object sender, System.EventArgs e) { }

[object Object],[object Object],[object Object],Events in the Web Page Generation Process private void Page_Load(object sender, System.EventArgs e) { if (!Page.IsPostBack) { // executes only on initial page load } //this code executes on every request } Page_Unload Page_Init Page_Load Server control events

Demonstration: Handling Postback Events

What Is Input Validation? ,[object Object],[object Object],[object Object]

Client-Side and Server-Side Validation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Valid? Valid? User Enters Data No No Yes Yes Error Message Client Server Web Form Processed

ASP.NET Validation Controls Compare to a custom formula CustomValidator Summarize the state of the validation controls on a page ValidationSummary Compare to a regular expression pattern RegularExpressionValidator Compare to a range RangeValidator Compare to another control, a value, or a data type CompareValidator Require user input RequiredFieldValidator Purpose Control Name

Adding Validation Controls to a Web Form ,[object Object],[object Object],[object Object],1 2 3 <asp:TextBox id="txtName" runat="server" /> <asp: Type_of_Validator id=" Validator_id " runat="server" ControlToValidate=" txtName " ErrorMessage=" Message_for_error_summary " Display=" static|dynamic|none " Text=" Text_to_display_by_input_control "> </asp: Type_of_Validator>

Combining Validation Controls ,[object Object],[object Object]

Demonstration: Using Validation Controls ,[object Object],[object Object],[object Object],[object Object],[object Object]

Developing an ASP.NET Web Application

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Developing an ASP.NET Web Application