C wpf textbox validating
It’s been used with WPF validation and integrates very seamlessly too.
As you can see from the screenshot, validation is triggered when the fields input fail the criteria.
The Code Project article even links to a Project with a WPF version of Error Provider.
I will be using a couple code samples from these articles.
To get started do this: The key that was pressed is accessible from the Key Event Args variable, e. Be aware that the keys may be different in other languages. Remembering lists like this is something that comes with experience. If you didn’t think of them on your own, don’t worry, experience comes with time. This is setup so that if someone pastes both letters and number, only the numbers are pasted: A1B2C3 becomes 123.
This event is not configured so we have to set it up. This last function actual handles the first five requirements all by itself.
This node type is used for elements for which we track errors.
This node type is used for elements which has subnodes with errors.
And then, beyond deciding whether or not the Error symbol would blink (I always the blinking exclamation point), there wasn’t a lot of pizzazz we could add. Getting Started Before I go any further, you can find most of the basics in these articles: I recommend reading these articles.
For example, we are validating that the first and last names are not empty fields. Validates On Data Error is the super star behind all this.
By flipping this flag on, the databinding will be able to communicate with any data types that implement IData Error Info.
I’m not going to harp too much on the details presented in these other articles.
Instead, I’m going to layout what I did to get this working and hopefully give you enough information to get started.