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21 mar 2012 · You can use DBNull.Value when you need to pass NULL as a parameter to the stored procedure. param.Value = DBNull.Value; Or you can use that instead of your if operator: param.Value = !string.IsNullOrEmpty(activity.StaffId) ? activity.StaffId : (object)DBNull.Value;
16 maj 2016 · You need pass DBNull.Value as a null parameter within SQLCommand, unless a default value is specified within stored procedure (if you are using stored procedure). The best approach is to assign DBNull.Value for any missing parameter before query execution, and following foreach will do the job.
Learn about how the .NET Framework Data Provider for SQL Server handles null, and read about null and SqlBoolean, three-valued logic, and assigning null values.
19 maj 2021 · This article will explain what problems can occur when working with SQL NULL values and it also gives some solution recommendations to overcome these issues. What is a SQL NULL value? In terms of the relational database model, a NULL value indicates an unknown value.
7 sie 2024 · Handling NULL values when working with SqlDataReader in C# is an essential aspect of data retrieval and processing. By following the techniques outlined in this blog post, you can ensure that your application gracefully handles NULL values and operates reliably in various scenarios.
28 sty 2021 · SQL databases operate on 3-valued logic (true, false, null) when performing comparisons, as opposed to the boolean logic of C#. When translating LINQ queries to SQL, EF Core tries to compensate for the difference by introducing additional null checks for some elements of the query.
21 paź 2022 · SqlNullValueException: Data is Null. This method or property cannot be called on Null values. I have reproduced the problem on my side, the issue relates the [Required] attribute and the Allow Nulls setting in the Database Product Designer.
