C# select查询中表的变量名

我想将字符串变量tablename中的表名添加到我的查询中。在c语言中可能吗？我试过下面的方法。但它不起作用。如您所见，我想在分数上设置FROM@tablename

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您的查询只是一个字符串，您的值为：

通常，数据库库不允许您将参数用于对象名称，而只允许使用值。在这种情况下，您需要手动插入表名。我已经编辑了您的问题，请参见原因：

public void tableInsertTest()
        {

            MySqlConnection conn = null;

            string tablename = "scores";

            try
            {
                conn = new MySqlConnection(cs);
                conn.Open();

                MySqlCommand cmd = new MySqlCommand();
                cmd.Connection = conn;
                cmd.CommandTimeout = 90;
                cmd.CommandText = (

                "INSERT INTO dailyrecords(recorddate, firstname, lastname, score ) " +
                "SELECT NOW(), name, lname, score FROM @tablename " );

                cmd.Prepare();

                cmd.Parameters.AddWithValue("@tablename", tablename);

                {
                    cmd.ExecuteNonQuery();
                }

                conn.Close();

            }

            finally
            {
                if (conn != null)
                {
                    conn.Close();
                }
            }
            return;
        }

cmd.CommandText = ("INSERT INTO dailyrecords(recorddate, firstname, lastname, score ) " +
                string.Format("SELECT NOW(), name, lname, score FROM {0} ", tablename) );