The 'promotionschedule' property on 'promotionschedule' could not be set to a 'null' value. You must set this property to a non-null value of type 'system.int64'.

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C#

List<PromotionSchedule> schedule=db.PromotionSchedule.Where(t => t.PromotionsId == id).ToList();

while executing the above statment we can get the error like
"The 'promotionschedule' property on 'PromotionSchedule' could not be set to a 'null' value. You must set this property to a non-null value of type 'System.Int64'."

Please help me
thank u.

What I have tried:

while executing the above statment we can get the error like
"The 'promotionschedule' property on 'PromotionSchedule' could not be set to a 'null' value. You must set this property to a non-null value of type 'System.Int64'."

Posted 18-Apr-19 19:08pm

Krishna Veni

Updated 18-Apr-19 20:09pm

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Krishna Veni 19-Apr-19 1:15am

promotionschedule is proprty on PromotionSchedule table

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David_Wimbley · Answer 1 · 2019-04-18T20:10:00

Given the lack of code here is the best route and most likley cause.

PromotionSchedule is a table in your database. It looks as though you are using entity framework so the entity mapping to PromotionSchedule table has a promotionschedule column in that table. Within that table, this column must be a nullable integer but your entity mapping must have it as a non-nullable integer which is why you are getting a run time error.

You either need to make the column in your PromotionSchedule table non-nullable (Requires rebuilding the table if sql server) or you need to change the entity mapping for promotionschedule column to be a nullable int. So changing it to Nullable<int> promotionschedule as it probably currently is int promotionschedule