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13 lip 2009 · To assign a non-empty variable without repeating the actual variable name (and without assigning anything if variable is null!), you can use a little helper method with a Action parameter: public static void CallIfNonEmpty(string value, Action<string> action) {. if (!string.IsNullOrEmpty(value)) action(value); }
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;
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.
10 paź 2016 · The most terse and declarative way to write this is to use C#'s ?? operator. Your line becomes: new SqlParameter("@Price", (object)items.Price ?? DbNull.Value), The expression here will either return the non-null value of the left operand (items.Price), or return the operand to the right instead.
5 mar 2024 · In this article, we will explore different approaches to inserting line breaks into VARCHAR and NVARCHAR SQL strings. Enhancing Readability in SQL VARCHAR/NVARCHAR Strings with Line Breaks. In SQL, inserting a line break into a VARCHAR or NVARCHAR string can be achieved using functions like CHAR or CONCAT.
7 sie 2024 · Using SQLParameter with Nullable Values. When passing nullable values to SQL queries using SQLParameter, it's important to handle null values appropriately to prevent SQL injection vulnerabilities and ensure the correct behavior of the query. Here's an example of how you can handle a nullable parameter in C# using SQLParameter:
7 paź 2019 · I’ve previously posted about how to cope with nullable values retrieved from a SqlDataReader but it’s also necessary to account for nulls when passing values through to a SQL operation such as a stored procedure.
