Null value converted into "default"

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C#

SQL-Server

SQL-Server-2008

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i am using C# 4.0 at cmd.ExecuteNonQuery(); there is an error with the help of SQL server profile i saw that :

SQL

cmd.Parameters.Add("@employeeSocialTitle", SqlDbType.Char, 5).Value = employeeSocialTitle;

when employeeSocialTitle is null it replace it by default
and that makes error so how can i force it to insert null when the employeeSocialTitle value is null

regards

Posted 4-May-12 3:42am

youssef_123

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VJ Reddy 9-May-12 1:33am

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VJ Reddy · Accepted Answer · 2012-05-04T04:22:00

I think since the SQL server expects DBNull.Value instead of null, when employeeSocialTitle is null, it is replaced with default. To avoid this the null coalescing operator can be used as follows:

C#

cmd.Parameters.Add("@employeeSocialTitle", SqlDbType.Char, 5).Value = employeeSocialTitle ?? DBNull.Value;