Hi Rick,

You would need to create your own Field Type and add the Regex input box as a Setting, documentation for this is available here:

Developer Docs

So long as you implement the FieldType type, Forms/Contour will load your custom type at runtime and make it available to you inside the CMS.

The Setting would be something like this:

[Setting("Regex",
     description = "Enter a regex",
     view = "textfield")]
public string Regex { get; set; }

You would then apply the Regex to the field value in the ValidateField method like you would any regex and return a list of strings to specify an error being found - these are the messages that will be displayed to the user.

Let me know how you get on.

/Chris

Sorry I've just noticed that FieldType has a Boolean property called 'SupportsRegex', you could try simply setting this in the constructor rather than playing around with custom settings.

    public ExtendedDatePicker()
    {
        Id = new Guid("46351f37-dc90-4067-9a98-e2ea24871a30"); // Set your own GUID here
        Name = "Extended Date Picker";
        Description = "Allows date picking with regex validation";
        Icon = "icon-autofill";
        DataType = FieldDataType.DateTime;
        SupportsRegex = true;
    }

That might work, but I haven't tested this in any way, so I don't know if the Regex checking is handled by the base type or if you need to implement this in the ValidateField method.

Have a play, let me know!

/Chris

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