#How to Add a Custom TimePeriod Type

##Adding Custom TimePeriods

Here is an example of how to add custom time spans to the filters. Apply this code within InitializeReporting() in your Global.asax.

//the if block prevents the key from being re-added to the list
if (!AdHocSettings.CustomTimePeriods.ContainsKey("Lunar Cycle")) { 
    AdHocSettings.CustomTimePeriods.Add("Lunar Cycle", new CustomTimePeriod("Lunar Cycle", new TimeSpan(29, 12, 44, 2, 976))); 
}

##Modifying An Existing Time Period

You may at any time modify your existing set of custom time periods. You cannot, however, modify built-in time periods this way.

    CustomTimePeriod ctp = AdHocSettings.CustomTimePeriods["Lunar Cycle"];
    ctp.StartDate = DateTime.Now + ctp.Period; //passed by reference so the original list will update

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