If you need to transfer data from one action to another, you need to use TempData . For example, in GetDate, you can add data to a session as follows:
TempData["Key"] = YourData
And then redirect. In ProcessP, you can access data using a previously used key:
var whatever = TempData["Key"];
For a decent read, I would recommend reading this thread: ASP.NET MVC - TempData - Good or Bad Practice
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