在控件中获取验证错误消息

Question

I am using C# to build a windows form with DevExpress. In the windows form I have DXValidationProvider and DXErrorProvider to show error message for invalid cases. We try to use localization for error messages. My question, how to check if the windows form has DXValidationProvider and how to check which contorls are defined in the DXValidationProvider. We tried to use the following code

foreach (Control item in Controls)
{
    if (item is DXValidationProvider)
    {
        ....
    }
}

We got warning as shown in the below picture

Answer 1

DXValidationProvider is a Component and will not appear in Controls collection.

If you have added the component through designer, then there should be a components member in your form. You can use it like this:

var provider = components.Components.OfType<DXValidationProvider>().FirstOrDefault();
if(provider != null)
{
    //do something ...
}