My ipad was grayed out for a long time but today it was connecting to wi-fi fir a hour and now it's off again

Hi Ria333,
I understand that you are having issues with Wi-Fi being greyed out on your iPad. Let's go over what your options are.
With your Wi-Fi being greyed out, you have two options to get this working. You start with resetting the network settings by going to Settings > General > Reset and then tap Reset Network Settings. After your iPad restarts, your Wi-Fi should be restored. If it does not, then you will need to contact Apple Support for further assistance.
If Wi-Fi is grayed out or dim on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT204324
Have a good day