Validating dropdownlist developing value dating asian women

03-Jun-2016 09:21

Html Controls; namespace Web Data Validation { public class Web Form1 : System. As we mentioned earlier, validation controls execute when the user clicks a Button control, including HTML button controls and server button controls such as the Link Button and Image Button.

Drag one Text Box control and give it an ID of First Name Text Box, two Button controls (Submit Button and Cancel Button), and one Required Field Validator (First Name Required Field Validator). You can validate the following server controls: Text Box, List Box, Drop Down List, Radio Button List, and the following HTML controls: Html Input Text, Html Input File, Html Select, and Html Text Area.

This Required Field Validator forces the user to enter text into the control associated with the validator. We have seen the Required Field Validator in our first sample program, let’s move on to examine the rest of the controls.

As we will see later in the code-behind file, the Cancel Button will clear all of the fields on the form, and we do not want to validate any of the fields when the user presses this button. The Range Validator will first try to convert the values it is examining into the type specified.

Notice in the following screen capture, we can see the Required Field Validator error message display on the form. If the conversion fails, the validation also fails.

This is the exact position the error message will appear if validation fails. To demonstrate the Range Validator, we will add an additional Text Box control to our web form (Hire Date Text Box), and a Range Validator.

For this first example we do not need to place much code into the code-behind file. We want to make sure a user enters a hire date, the date is in a valid format, and the data is within one week (plus or minus) of today’s date. To Short Date String(); } } Notice we are setting a Display property for the Range Validator.

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The cancel button has a Causes Validation property. The Control To Validate property references the ID of the input control to check.

Validation occurs when a user clicks any Button control by default, but you can change this behavior by setting the Causes Validation property to false. The Minimum Value and Maximum Value properties control the allowed range of the input. This property can take one of the following values: String, Integer, Double, Date, or Currency.

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