Apr 19, 2013 · Primary keys cannot be Null. A PK must be unique, and Null isn't. Also, int is not a nullable type, so it's default value is 0.
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Apr 16, 2014 · Entity Framework must have a key field in order to work. It doesn't have to be a true primary key in the database but it needs to be unique.
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Jan 25, 2017 · Stack Overflow Public questions ... My question is why is it trying to insert NULL in Id column ... Entity's primary key field is set to 0 instead ...
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Nov 14, 2012 · I checked the table creation script and the column is set to Not Null and no default value is assigned. I am using SQL Server 2008. sql · sql ...
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Oct 30, 2017 · I would start bij checking that :) By default it's set to false. – Tvt. Oct 30, 2017 at 8:54.
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Jun 3, 2020 · Primary key is a database feature. Java or C# don't have the concept of primary (or foreign) keys. The languages won't care even if you use NULL ...
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Oct 21, 2008 · Try to assign it System.DBNull instead.
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Aug 11, 2016 · I just started learning Entity Framework and I am trying to insert data into data base. I have Customer table which has three fields id(int), ...
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Jul 14, 2021 · Pausing the 1-rep voting experiment on Stack Overflow: reflecting on the... Related. 4 · Entity's primary key field is set to 0 instead of null.
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