bool CheckNull(object value);
using System.Data.SQLite; SQLiteConnection conn = new SQLiteConnection("Data Source=mydatabase.db;Version=3;"); conn.Open(); object nullValue = null; bool isNull = conn.CheckNull(nullValue); // returns true object notNullValue = "Hello World"; bool notNull = conn.CheckNull(notNullValue); // returns false conn.Close();
using System.Data.SQLite; SQLiteConnection conn = new SQLiteConnection("Data Source=mydatabase.db;Version=3;"); conn.Open(); SQLiteCommand cmd = new SQLiteCommand("SELECT * FROM myTable WHERE column1 IS NULL", conn); SQLiteDataReader reader = cmd.ExecuteReader(); while (reader.Read()) { if (conn.CheckNull(reader["column1"])) { Console.WriteLine("Column1 is null"); } } reader.Close(); conn.Close();In this example, the CheckNull method is used to check if the value of the "column1" column in the database is null. The SQLiteDataReader is used to read the values in the column. If the value is null, the CheckNull method returns true and the output message is displayed. Overall, the System.Data.SQLite package library is used to provide access to SQLite databases in C# applications. The SQLiteConnection class and its CheckNull method are useful in establishing connections and checking null values, respectively.