Easy Tutorial
Met Websecurity Changepassword Control Listbox Control Htmlinputbutton Prop Webcontrol Linkbutton Postbackurl Prop Webcontrol Listcontrol Selectedindex Prop Webcontrol Listcontrol Items Prop Webcontrol Tablerow Tablesection Met Websecurity Resetpassword Met Websecurity Createaccount Prop Webcontrol Calendar Showdayheader Prop Webcontrol Checkbox Textalign Aspnet Databinding Prop Webcontrol Style Borderstyle Webpages Helpers Webpages Ref Webmail Mvc Reference Prop Webcontrol Listcontrol Text Prop Webcontrol Calendar Todaysdate Met Websecurity Getpasswordchangedate Prop Webcontrol Calendar Nextmonthtext Webpages Ref Websecurity Met Websecurity Logout Control Adrotator Control Hyperlink Webpages Global Webpages Webgrid Prop Webcontrol Standard Borderstyle Prop Webcontrol Calendarday Isweekend Prop Webcontrol Bulletedlist Bulletimageurl Razor Cs Logic Prop Control Standard Visible Prop Webcontrol Tablecell Columnspan Prop Webcontrol Calendar Showgridlines Webpages Ref Database Mvc Security Prop Webcontrol Button Onclientclick Prop Webcontrol Table Caption Prop Webcontrol Tablecell Wrap Prop Webcontrol Adrotator Advertisementfile Aspnet Ref Htmlcontrols Prop Webcontrol Style Backcolor Prop Webcontrol Radiobuttonlist Repeatcolumns Webpages Razor Prop Webcontrol Textbox Text Prop Control Standard Uniqueid Prop Webcontrol Table Horizontalalign Prop Webcontrol Textbox Textmode Control Label Prop Websecurity Hasuserid Prop Webcontrol Standard Style Prop Webcontrol Calendar Selecteddaystyle Prop Webcontrol Textbox Readonly Control Customvalidator Control Reqfieldvalidator Aspnet Intro Prop Control Standard Page Prop Webcontrol Calendarday Isselected Prop Webcontrol Radiobuttonlist Repeatlayout 2 Prop Webcontrol Hyperlink Target Prop Webcontrol Image Imageurl Prop Webcontrol Bulletedlist Target Met Websecurity Isconfirmed Prop Webcontrol Calendar Selectorstyle Control Checkboxlist Webpages Php Webpages Folders Prop Webcontrol Button Text Mvc Models Prop Webcontrol Calendar Weekenddaystyle Index Prop Webcontrol Standard Tabindex Prop Webcontrol Listcontrol Datavaluefield Prop Webcontrol Listitem Selected Control Style Prop Webcontrol Standard Tooltip Mvc Layout Control Htmlinputimage Prop Webcontrol Style Bordercolor Prop Webcontrol Standard Borderwidth Control Comparevalidator Aspnet Xml Webpages Layout Razor Intro Control Calendarday Razor Vb Logic Prop Webcontrol Button Validationgroup Prop Webcontrol Imagebutton Validationgroup Prop Webcontrol Table Gridlines Prop Webcontrol Button Postbackurl Prop Webcontrol Adrotator Target Prop Webcontrol Tablecell Verticallalign Webpages Intro Met Websecurity Iscurrentuser Control Htmlinputtext Prop Webcontrol Standard Height Control Htmlinputcheckbox Prop Webcontrol Textbox Autopostback Control Htmlform Prop Webcontrol Calendar Selecteddates Prop Websecurity Isauthenticated Control Linkbutton Control Panel Control Placeholder Mvc Folders Prop Webcontrol Panel Wrap Control Radiobuttonlist Aspnet Ref Webcontrols Prop Webcontrol Style Borderwidth Aspnet Arraylist Prop Webcontrol Standard Bordercolor Prop Webcontrol Radiobuttonlist Repeatdirection Met Websecurity Confirmaccount Prop Webcontrol Standard Backcolor Webpages Ref Classes Control Image Control Bulletedlist Prop Webcontrol Calendarday Istoday Aspnet Events Prop Webcontrol Table Cellpadding Aspnet Repeater Met Websecurity Createuserandaccount Control Imagebutton Prop Webcontrol Panel Groupingtext Prop Webcontrol Tablecell Rowspan Prop Webcontrol Calendar Prevmonthtext Prop Webcontrol Calendar Nextprevformat Prop Webcontrol Calendar Selectweektext Prop Webcontrol Checkboxlist Repeatlayout Prop Webcontrol Image Alternatetext Prop Webcontrol Calendarday Date Prop Webcontrol Listitem Value Prop Webcontrol Calendar Shownextprevmonth Prop Webcontrol Linkbutton Onclientclick Prop Webcontrol Panel Defaultbutton Aspnet Tutorial Prop Webcontrol Table Cellspacing Control Htmlimage Prop Webcontrol Calendar Selectmonthtext Prop Webcontrol Panel Backimageurl Control Xml Razor Syntax Prop Webcontrol Standard Cssclass Met Websecurity Generatepasswordresettoken Control Htmltablecell Prop Webcontrol Bulletedlist Displaymode Control Checkbox Control Htmlinputfile Prop Webcontrol Imagebutton Postbackurl Prop Webcontrol Calendar Daystyle Control Rangevalidator Met Websecurity Requireroles Prop Webcontrol Bulletedlist Bulletstyle Prop Webcontrol Calendar Todaydaystyle Prop Webcontrol Listitem Text Control Radiobutton Prop Webcontrol Tablecell Text Prop Websecurity Currentuserid Control Dropdownlist Mvc Intro Prop Webcontrol Calendar Othermonthdaystyle Prop Webcontrol Textbox Rows Prop Webcontrol Calendarday Isothermonth Aspnet Masterpages Control Htmlinputradiobutton Prop Webcontrol Imagebutton Onclientclick Prop Webcontrol Radiobuttonlist Repeatlayout Prop Webcontrol Textbox Autocompletetype Control Htmltextarea Aspnet Viewstate Prop Webcontrol Style Height Met Websecurity Userexists Prop Webcontrol Checkbox Text Prop Webcontrol Calendar Caption Control Tablerow Prop Webcontrol Button Causesvalidation Prop Webcontrol Textbox Columns Prop Webcontrol Imagebutton Causesvalidation Prop Control Standard Clientid Control Htmltable Control Validationsummary Prop Webcontrol Linkbutton Validationgroup Control Htmlinputhidden Prop Webcontrol Textbox Maxlength Aspnet Dbconnection Met Websecurity Getcreatedate Razor Cs Variables Met Websecurity Login Prop Webcontrol Panel Direction Aspnet Sortedlist Prop Webcontrol Calendar Cellpadding Aspnet Button Prop Webcontrol Literal Text Prop Webcontrol Hyperlink Text Prop Websecurity Currentusername Prop Webcontrol Calendar Captionalign Prop Webcontrol Hyperlink Navigateurl Razor Vb Variables Control Listitem Prop Webcontrol Calendarday Daynumbertext Prop Webcontrol Checkboxlist Textalign Prop Control Standard Bindingcontainer Prop Control Standard Parent Prop Webcontrol Image Imagealign Met Websecurity Getuserid Prop Webcontrol Calendar Firstdayofweek Control Table Control Listcontrol Prop Webcontrol Calendar Nextprevstyle Prop Webcontrol Listcontrol Validationgroup Prop Webcontrol Calendar Cellspacing Prop Webcontrol Checkboxlist Repeatcolumns Webpages Objects Razor Vb Loops Aspnet Examples Prop Webcontrol Listbox Rows Prop Webcontrol Standard Accesskey Prop Control Standard Id Prop Webcontrol Linkbutton Text Prop Webcontrol Textbox Wrap Mvc App Control Calendar Prop Webcontrol Listitem Enabled Webpages Publish Aspnet Forms Webpages Ref Helpers Control Button Prop Webcontrol Style Forecolor Met Websecurity Requireauthenticateduser Aspnet Ref Validationcontrols Prop Webcontrol Standard Forecolor Prop Webcontrol Standard Prop Control Standard Prop Webcontrol Table Captionalign Prop Webcontrol Hyperlink Imageurl Prop Webcontrol Checkboxlist Cellpadding Aspnet Prop Control Standard Namingcontainer Met Websecurity Requireuser Prop Webcontrol Listcontrol Selecteditem Webpages Files Prop Webcontrol Tablerow Verticalalign Met Websecurity Initializedatabaseconnection Prop Webcontrol Listbox Selectionmode Prop Webcontrol Bulletedlist Firstbulletnumber Mvc Database Prop Webcontrol Calendar Selectionmode Mvc Views Prop Webcontrol Style Width Prop Webcontrol Tablerow Horizontalalign Mvc Controllers Webpages Examples Prop Webcontrol Checkboxlist Repeatdirection Aspnet Navigation Prop Webcontrol Checkboxlist Cellspacing Prop Webcontrol Standard Font Prop Webcontrol Calendar Dayheaderstyle Control Regularexpvalidator Mvc Publish Prop Webcontrol Xml Documentsource Aspnet Controls Prop Webcontrol Dropdownlist Selectedindex Prop Webcontrol Tablecell Horizontalalign Control Htmlanchor Aspnet Hashtable Webpages Forms Prop Webcontrol Standard Enabled Control Literal Prop Webcontrol Panel Scrollbars Mvc Htmlhelpers Prop Webcontrol Table Backimageurl Aspnet Pages Prop Webcontrol Radiobuttonlist Textalign Prop Webcontrol Calendarday Isselectable Prop Webcontrol Style Cssclass Prop Webcontrol Listcontrol Autopostback Prop Webcontrol Style Font Razor Cs Loops Prop Webcontrol Radiobuttonlist Cellspacing Prop Webcontrol Checkbox Checked Webpages Chart Control Textbox Aspnet Datalist Prop Webcontrol Listcontrol Datatextfield Control Htmlselect Prop Webcontrol Calendar Titlestyle Prop Webcontrol Button Usesubmitbehavior Prop Webcontrol Calendar Titleformat Prop Webcontrol Calendar Selecteddate Prop Webcontrol Listcontrol Selectedvalue Control Tablecell Aspnet Textbox Webpages Email Prop Webcontrol Panel Horizontalalign Control Htmlgeneric Control Htmlbutton Prop Webcontrol Calendar Showtitle Prop Webcontrol Calendar Daynameformat Prop Webcontrol Calendar Visibledate Control Htmltablerow Prop Webcontrol Radiobuttonlist Cellpadding
❮ Prop Webcontrol Xml Documentsource Prop Webcontrol Dropdownlist Selectedindex ❯

ASP.NET Web Forms - Server Controls

Server controls are tags that are understood by the server.

Limitations of Classic ASP

The following code listing is copied from the previous chapter: <%Response.Write(now())%>

The code above reflects the limitations of Classic ASP: code blocks must be placed where you want the output to be displayed.

With Classic ASP, it is impossible to separate executable code from the HTML page. This makes the page difficult to read and maintain.

ASP.NET - Server Controls

ASP.NET has solved the problem of "spaghetti code" mentioned above through server controls.

Server controls are tags that are understood by the server.

There are three types of server controls:

ASP.NET - HTML Server Controls

HTML server controls are HTML tags that are understood by the server.

HTML elements in an ASP.NET file are, by default, treated as text. To make these elements programmable, add the runat="server" attribute to the HTML element. This attribute indicates that the element is to be treated as a server control. An id attribute is also added to identify the server control. The id reference can be used to manipulate the server control at runtime.

Note: All HTML server controls must be within a <form> tag with the runat="server" attribute. The runat="server" attribute indicates that the form is to be processed on the server. It also indicates that the controls contained within it can be accessed by server scripts.

In the following example, we declare an HtmlAnchor server control in the .aspx file. Then we manipulate the HRef property of the HtmlAnchor control in an event handler (an event handler is a subroutine that executes code for a given event). The Page_Load event is one of the many events understood by ASP.NET:

The executable code itself has been moved outside of the HTML.

ASP.NET - Web Server Controls

Web server controls are special ASP.NET tags that are understood by the server.

Like HTML server controls, web server controls are also created on the server and require the runat="server" attribute to be effective. However, web server controls do not necessarily map to any existing HTML elements; they can represent more complex elements.

The syntax for creating a web server control is:

In the following example, we declare a Button server control in the .aspx file. Then we create an event handler for the Click event to change the text on the button:

ASP.NET - Validation Server Controls

Validation server controls are used to validate user input. If the user input does not pass validation, an error message is displayed to the user.

Each validation control performs a specific type of validation (such as validating a specific value or a range of values).

By default, page validation is performed when a Button, ImageButton, or LinkButton control is clicked. You can set CausesValidation to false to prevent validation when the button control is clicked.

The syntax for creating a validation server control is:

In the following example, we declare a TextBox control, a Button control, and a RangeValidator control in the .aspx file. If validation fails, the text "The value must be from 1 to 100!" will be displayed in the RangeValidator control:

Example

❮ Prop Webcontrol Xml Documentsource Prop Webcontrol Dropdownlist Selectedindex ❯