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Chapter 9: Validation Controls 221color:#0000cc;}Required Field ValidationPlease fill out the form:*Required field: *Name City State Zip*GenderMaleFemaleThe C# portion of the application is very short. All you need to do is to remove thedefault Page_Load function and add a single statement to the Button_Click eventhandler as shown in the following code listing:(continued)
222ASP.NET 3.5: A Beginner’s GuideC# ReqFld.aspx.csusing System;public partial class _Default : System.Web.UI.Page{protected void Button1_Click(object sender, EventArgs e){Label1.Text = "Information sent successfully";}}Test the application by first filling in only the City and Zip fields. After you click the SendInformation button, you should see the application respond with two error messages generatedby the required field validation controls. Figure 9-2 shows what you can expect to see.Notice that even though the State field was left unfilled, no error message has beengenerated. Only those fields where the required validator was at work was the errormessage generated when the field was left blank. Also note that no success notice at thebottom has been posted. Whenever a validation error occurs with the validation controls,C# methods associated with the ASP.NET portion of the application will not fire.Figure 9-2 Error messages generated for required fields where no entries are made
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ASP.NET 3.5A Beginner’s Guide
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ASP.NET 3.5A Beginner’s GuideWill
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This book is dedicated to Ricky, Ol
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Contents at a GlancePART I Getting
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For more information about this tit
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Contents xiUsing HTML Forms Interac
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Contents xiiiCREATE: The SQL Comman
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Contents xv17 ASP.NET Ajax . . . .
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AcknowledgmentsThis book was greatl
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IntroductionWhat distinguishes the
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Introduction xxiWhat This Book Cove
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Introduction xxiiiChapter 7: CSS fo
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Chapter 17: ASP.NET Ajax One of the
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Part IGetting StartedCopyright © 2
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Chapter 1Introduction toASP.NET 3.5
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Chapter 1: Introduction to ASP.NET
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Chapter 2ASP.NET 3.5 Toolsand Devel
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Chapter 2: ASP.NET 3.5 Tools and De
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Chapter 3C# and ASP.NET 3.5Copyrigh
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Chapter 4Doing More withC# and ASP.
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Chapter 4: Doing More with C# and A
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Part IIForms and ControlsCopyright
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Chapter 5HTML Forms: A ReviewCopyri
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Chapter 5: HTML Forms: A Review 109
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Chapter 6Standard Web ControlsCopyr
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Page 294 and 295: Part IIIASP.NET and DatabasesCopyri
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Chapter 11: A SQL Primer 271the dat
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Chapter 11: A SQL Primer 275Specify
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Chapter 11: A SQL Primer 277ASP.NET
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Chapter 11: A SQL Primer 279Looking
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Chapter 11: A SQL Primer 281Figure
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Chapter 11: A SQL Primer 283The sta
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Chapter 11: A SQL Primer 285That is
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Chapter 12ADO.NET:Hello DatabaseCop
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Chapter 12: ADO.NET: Hello Database
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Chapter 13Data BindingCopyright ©
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Chapter 13: Data Binding 331On the
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Chapter 13: Data Binding 333Figure
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Chapter 13: Data Binding 351Summary
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Chapter 14LINQCopyright © 2009 by
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Chapter 14: LINQ 355TIPTry ThisThis
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Chapter 14: LINQ 357Figure 14-2 Add
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Chapter 14: LINQ 359Figure 14-5 Add
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Chapter 14: LINQ 361Figure 14-7 Set
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Chapter 14: LINQ 363Figure 14-9 Set
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Chapter 14: LINQ 365As you can see,
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Chapter 14: LINQ 367Basic LINQC# CS
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Chapter 14: LINQ 369are used with a
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Chapter 15FilesCopyright © 2009 by
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Chapter 15: Files 373The bulk of th
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Chapter 15: Files 375Ask the Expert
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Chapter 15: Files 381As you can see
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Chapter 15: Files 385The only cauti
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Chapter 15: Files 387Figure 15-7 Vi
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Chapter 16SecurityCopyright © 2009
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Chapter 16: Security 391certain peo
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Chapter 16: Security 393So while yo
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Chapter 16: Security 395ASP.NET Log
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Chapter 16: Security 397Figure 16-4
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Chapter 16: Security 399Try This A
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Chapter 16: Security 413Next, you n
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Chapter 16: Security 41512. With th
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Chapter 16: Security 417SummaryWeb
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Chapter 17ASP.NET AjaxCopyright ©
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Chapter 17: ASP.NET Ajax 421uses st
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Chapter 17: ASP.NET Ajax 433of the
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Chapter 17: ASP.NET Ajax 435body{ba
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Chapter 17: ASP.NET Ajax 439Summary
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Index< > (arrow brackets), 36Aacces
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Index 443ConVarASP.NET, 55C#, 56coo
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Index 445IntelliSense, 27and events
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Index 447StreamReader, 381StreamWri
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