Window窗体C# MS Access检查是否已具有数据值

using System;
using System.Data.OleDb;

namespace CheckDataValue
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\path\\to\\database.accdb";
            string query = "SELECT COUNT(*) FROM TableName WHERE FieldName IS NOT NULL";

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

                using (OleDbCommand command = new OleDbCommand(query, connection))
                {
                    int count = (int)command.ExecuteScalar();

                    if (count > 0)
                    {
                        Console.WriteLine("The field has data values.");
                    }
                    else
                    {
                        Console.WriteLine("The field does not have any data values.");
                    }
                }
            }
        }
    }
}