Controls in asp.net
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Controls in asp.net
- 3. controls • Controls are the building blocks in web form • Server controls are tags that are understood by the server.
- 4. Asp.net controls server control Html server control Webserver control Validation server control
- 5. Html server control • HTML server controls are HTML tags understood by the server • All HTML server controls must be within a <form> tag with the runat="server" attribute. • The runat="server" attribute indicates that the form should be processed on the server.
- 6. Html server controls in asp.net Html server controls Description Controls an <a> HTML element HtmlButton Controls a <button> HTML element HtmlInputButton Controls <input type="button">, <input type="submit">, and <input type="reset"> HTML elements HtmlInputCheckBox Controls an <input type="checkbox"> HTML element HtmlInputRadioButton Controls an <input type="radio"> HTML element HtmlTextArea Controls a <textarea> HTML element
- 7. Example
- 8. <html> <body> <form runat="server"> <input id="Text1" type="text" /> </form> </body> </html>
- 9. Web server control • Web server controls are special ASP.NET tags understood by the server • Web server controls are also created on the server and they require a runat="server" attribute to work.
- 10. Webserver control Description AdRotator Displays a sequence of images Button Displays a push button BulletedList Creates a list in bullet format Repeater Displays a repeated list of items bound to the control HyperLink Creates a hyperlink
- 11. Example
- 12. <html> <body> <form runat="server"> <asp:Button id="button1" Text="Click me!" runat="server" OnClick="submit"/> </form> </body> </html>
- 13. Validation server control • Validation server controls are used to validate user-input. If the user-input does not pass validation, it will display an error message to the user. • Each validation control performs a specific type of validation (like validating against a specific value or a range of values). • By default, page validation is performed when a Button, is clicked. You can prevent validation when a button control is clicked by setting the CausesValidation property to false
- 14. Validation Server Control Description CompareValidator Compares the value of one input control to the value of another input control or to a fixed value CustomValidator Allows you to write a method to handle the validation of the value entered RangeValidator Checks that the user enters a value that falls between two values RegularExpressionValidator Ensures that the value of an input control matches a specified pattern RequiredFieldValidator Makes an input control a required field ValidationSummary Displays a report of all validation errors occurred in a Web page
- 15. Example
- 16. <html> <body> <form runat="server"> <p>Enter a number from 1 to 100: <asp:TextBox id="tbox1" runat="server" /> <br /><br /> <asp:Button Text="Submit" runat="server" /> <asp:RangeValidator ControlToValidate="tbox1" MinimumValue="1" MaximumValue="100" Type="Integer" Text="The value must be from 1 to 100!" runat="server" /> </form> </body> </html>
- 17. Difference between server control and html control Asp.net server control: retain state Html control: does not retain state Example
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