Brian Mains
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Brian Mains
asked on 08 Dec 2008, 03:46 PM
Hello,
I see the RadControls have their own in-built validation into the controls, but when do those validations fire? Do they prevent the page from being processed (set Page.IsValid to false) if a control is invalid? Does the validation need manually triggered? I see in some cases, the answer is no...
Thanks.
I see the RadControls have their own in-built validation into the controls, but when do those validations fire? Do they prevent the page from being processed (set Page.IsValid to false) if a control is invalid? Does the validation need manually triggered? I see in some cases, the answer is no...
Thanks.
3 Answers, 1 is accepted
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Hello Brian,
That would depend on the specific Telerik control that you use. For example, RadScheduler's advanced form will validate for empty subject and end date being before start date.
Can you please describe in more detail the exact case that you are dealing with?
Greetings
Peter
the Telerik team
Check out Telerik Trainer, the state of the art learning tool for Telerik products.
That would depend on the specific Telerik control that you use. For example, RadScheduler's advanced form will validate for empty subject and end date being before start date.
Can you please describe in more detail the exact case that you are dealing with?
Greetings
Peter
the Telerik team
Check out Telerik Trainer, the state of the art learning tool for Telerik products.
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Brian Mains
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answered on 10 Dec 2008, 07:53 PM
Like the controls that define the EmptyMessage, which pops up the animation that shows the error message... how is that triggered?
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Hello Brian,
Telerik textboxes (RadTextBox, RadDateInput, RadNumericTextBox, RadMaskedTextBox) analyze what the user has entered and can change their appearance accordingly.
The EmptyMessage is applied when a textbox has been blurred and contains nothing.
The invalid state appearance is applied by RadDateInput when it cannot parse the entered value to a valid date. It is also used by RadNumericTextBox and RadMaskedTextBox if you try to type something invalid inside (for example a letter inside the numeric textbox).
The textboxes cannot prevent postback by default - you can use some validators for this purpose, e.g.:
http://demos.telerik.com/aspnet-ajax/Input/Examples/Common/Validation/DefaultCS.aspx
Alternatively, you can implement some custom client-side logic, which analyzes the textboxes' values and perform some actions. You can use the controls' OnValueChanged, OnValueChanging and OnError client-side event handlers.
OnValueChanging
OnValueChanged
OnError
http://demos.telerik.com/aspnet-ajax/Input/Examples/Programming/ClientSide/OnError/DefaultCS.aspx
Let us know if you need more information.
Sincerely yours,
Dimo
the Telerik team
Check out Telerik Trainer, the state of the art learning tool for Telerik products.
Telerik textboxes (RadTextBox, RadDateInput, RadNumericTextBox, RadMaskedTextBox) analyze what the user has entered and can change their appearance accordingly.
The EmptyMessage is applied when a textbox has been blurred and contains nothing.
The invalid state appearance is applied by RadDateInput when it cannot parse the entered value to a valid date. It is also used by RadNumericTextBox and RadMaskedTextBox if you try to type something invalid inside (for example a letter inside the numeric textbox).
The textboxes cannot prevent postback by default - you can use some validators for this purpose, e.g.:
http://demos.telerik.com/aspnet-ajax/Input/Examples/Common/Validation/DefaultCS.aspx
Alternatively, you can implement some custom client-side logic, which analyzes the textboxes' values and perform some actions. You can use the controls' OnValueChanged, OnValueChanging and OnError client-side event handlers.
OnValueChanging
OnValueChanged
OnError
http://demos.telerik.com/aspnet-ajax/Input/Examples/Programming/ClientSide/OnError/DefaultCS.aspx
Let us know if you need more information.
Sincerely yours,
Dimo
the Telerik team
Check out Telerik Trainer, the state of the art learning tool for Telerik products.