C# | SqlCommand查询中的Use参数

using System;
using System.Data;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "YourConnectionStringHere";
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();
            string sql = "SELECT * FROM Users WHERE UserId = @UserId";
            using (SqlCommand command = new SqlCommand(sql, connection))
            {
                // 添加参数
                command.Parameters.AddWithValue("@UserId", 1);

                using (SqlDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        Console.WriteLine($"User ID: {reader["UserId"]}, Name: {reader["Name"]}");
                    }
                }
            }
        }
    }
}