Question

我是SQL服务器的新手。

正如您所看到的，我上面的第一个函数仅用于调用第二个函数并将列表作为参数传递现在我正在解析来自divideTrans char数组的信息。每个值都意味着什么，我正在向控制台显示。但是，我需要将其保存到SQL数据库。解析的值。我在SQLite方面有一些经验，但这有点不同。我搜索了一些东西，这是我能想到的。但是，我发现没有简单的方法来更新列。我的列名与console.writeline代码中提到的相同，例如，一些列是“data record”，“record_id”，“article_code”等。所以我希望保存到列“数据记录”例如，“2.1运动记录”的值，然后在“record_id”中，divideTrans [0]的值。有人可以帮我一个有效的方法吗？

class save_parsed_data
{
    static string connectionstring;
    static SqlConnection connection; 

    public static void save_data(string transaction)
    {
        connectionstring = ConfigurationManager.
               ConnectionStrings["testEnvironmentSAMPLE.Properties.Settings.sampleConnectionString"].ConnectionString;

            List<char> dividedTrans = new List<char>(transaction.ToCharArray());

            if (transaction.StartsWith("21"))
                StringWith21(dividedTrans);

            Console.ReadKey();
    }

    public static void StringWith21(List<char> dividedTrans)
    {
        using (connection = new SqlConnection(connectionstring))
        using (SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM Sample_values", connection))
        {   
            DataTable codaTable = new DataTable(); 
            adapter.Fill(codaTable);

            Console.WriteLine("\nData Record 2.1: Movement Record.");

            Console.WriteLine("Record Identification: {0}", dividedTrans[0]);

            Console.WriteLine("Article Code: {0}", dividedTrans[1]);

            Console.WriteLine("Sequence Number: {0}", new string(dividedTrans.GetRange(2, 4).ToArray()));

            Console.WriteLine("Detail Number: {0}", new string(dividedTrans.GetRange(6, 4).ToArray()));

            Console.WriteLine("Reference Number of bank: {0}", new string(dividedTrans.GetRange(10, 21).ToArray()));

            Console.WriteLine("Movement Sign: {0}", new string(dividedTrans.GetRange(31, 1).ToArray()));

            Console.WriteLine("Amount: {0}", Convert.ToString(Int32.Parse(string.Join("", dividedTrans.GetRange(32, 15)))));

            Console.WriteLine("Value Date: {0}", DateandTime(string.Join("", dividedTrans.GetRange(47, 6))).ToString("d"));

            Console.WriteLine("Transaction Code: {0}", new string(dividedTrans.GetRange(53, 8).ToArray()));

            Console.WriteLine("Communication Type: {0}", new string(dividedTrans.GetRange(61, 1).ToArray()));

            Console.WriteLine("Communication zone: {0}", new string(dividedTrans.GetRange(62, 53).ToArray()));

            Console.WriteLine("Entry Date: {0}", DateandTime(string.Join("", dividedTrans.GetRange(115, 6))).ToString("d"));

            Console.WriteLine("Sequence Number: {0}", new string(dividedTrans.GetRange(121, 3).ToArray()));

            Console.WriteLine("Globalization Code: {0}", new string(dividedTrans.GetRange(124, 1).ToArray()));

            Console.WriteLine("Next Code: {0}", new string(dividedTrans.GetRange(125, 1).ToArray()));

            Console.WriteLine("Blank: {0}", new string(dividedTrans.GetRange(126, 1).ToArray()));

            Console.WriteLine("Linker Code: {0}", new string(dividedTrans.GetRange(127, 1).ToArray()));
        }
    }

}

Answer 1

我的建议是使用一些ORM（对象关系映射）工具。对于C＃，有2个主要的EntityFramework和NHibernate。为了简单起见，我首选EntityFramework。

Answer 2

有很多方法可以写入数据。

一种方法是原始SQL，如SQL update statement in C#

所示

{{1}}

如何从控制台应用程序读取/写入SQL数据库（C＃）

2 个答案: