Date Field - ASP.NET Date Picker with Validation
Do you ever need an ASP.NET date picker with validation? Date Field is the answer. Date Field
respresents an ASP.NET date picker that allows user to enter, display and validate date value.
Implementation
Date Field is implemented by the DateField class.
Documentation
Click here to see the documentation
of the DateField class.
Validations
Date Field supports validations in the following execution order.
- Not null validation
- Data format validation
- Compare to value validation
- Compare to control validation
- Range validation
- Relative range validation
- Custom validation
Custom Validation
Date Field supports custom validation at both client-side and server-side. To setup
the custom validation error message, use the DateField.CustomValidation.Message property;
to setup client-side custom validation, use the DateField.CustomValidation.ClientValidator
property to specify the name of a JavaScript function that is used to perform client-side custom validation;
to setup server-side custom validation, handle the server-side CustomValidate event.
The custom client validator function must take one parameter which in run-time will receve the
validation context as a JSON object in the following format:
{"source":datePartHolderIds, "data":dateObject, "callback":callbackFunction}.
Here the "source" is an array that holds the ids of the date part holder, e.g., context.source[0]
contains the year holder id, context.source[1] contains the month holder id, context.source[2] contains
the day holder id. "data" contains the JavaScript Date object to be validated; "callback" contains a function that can be used during asynchronous custom validation
to notify the XField's Client Validation Engine about the result of the validation.
To perform synchronous custom validation, add validation logic in the custom client validator you
provide, and return a boolean value to indicate whether the field data passes the validation or not.
To perform asynchronous (Ajax) custom validation, first save the callback function somewhere
(typically in a global variable); then setup Ajax call to the server-side to handle custom validation.
After the Ajax call completes, notify the XField's Client Validation Engine about the result of
the validation by invoking the saved callback with a boolean value to indicate whether the
field data passes the validation or not.
View Custom Validation Demo of Date Field.
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