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Posted by / 31-Aug-2017 23:18

Validating textbox c

Ive entered string 2 and numeric 2 but that doesnt seem to work: entering only 1 char will pass the validation.

After setting up the form, double-click the “check” button and do the following codes for validating the textboxes.

This slows down your application and causes the following message in your debug window: System. Data Error: 16 : Cannot get ‘Item[]‘ value (type ‘Validation Error’) from ‘(Validation. when you're new to WPF it's not obvious sometimes what goes where or what references are needed etc. How will you stop user from going to next page till user clears all validations on this page? As soon as user will click submit button, all client side validators will validate and of any of them fails then user remains on the same page. I have a little problem in this validation process.

Errors)’ (type ‘Read Only Observable Collection`1′). I don't wan't to show user the validation errors (red border on controls) before they try to save the form.

@mohit2k8 You have many options, IMO, worst is to create a helper method that does this on a list of text components, much better is to learn the decorator pattern: You decorate the text boxes with ability to validate their text.

Validating a textbox is very important and there are many ways on how to do it.

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But, in this tutorial, I’m going to teach you the simplest way on how to validate a textbox by using an error provider.