使用C#将Null插入到数据库中

using System;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "YourConnectionString"; // 替换为实际的数据库连接字符串

        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();

            string insertQuery = "INSERT INTO YourTable (ColumnName) VALUES (@Value)";
            SqlCommand command = new SqlCommand(insertQuery, connection);
            command.Parameters.AddWithValue("@Value", DBNull.Value); // 将字段设置为Null值

            int rowsAffected = command.ExecuteNonQuery();
            Console.WriteLine("插入了 {0} 行数据。", rowsAffected);
        }
    }
}