Question

我需要帮助。我应该如何将表中的每一行写入Excel文件？

问题＃1：如何从OracleDataReader获取每个单元格或每行的值？

问题＃2：表格中的列数可能会有所不同。我应该读取每个单元格并将其写入Excel或按行吗？

代码：

try            
{
    string connectionString = ConfigurationManager.ConnectionStrings["OracleConnectionString"].ConnectionString;

    OracleConnection connection = new OracleConnection();
    connection.Open();

    if(connection.ToString().Equals("Open"))
    {
        OracleCommand cmd = new OracleCommand();
        cmd.Connection = connection;

        cmd.Parameters.Add (dict_name);

        cmd.CommandText = "SELECT * from :dict_name";
        cmd.CommandType = CommandType.Text;

        OracleDataReader dataReader = cmd.ExecuteReader();

        while (dataReader.Read())
        {
        }
    }

    connection.Close();
}
catch (OracleException e)
{
    if (e.ErrorCode != 2000)
    {
        Console.WriteLine("Oracle Error -> {0} {1}", DateTime.Now.ToString("dd mm yyyy HH:mm:ss"), e.StackTrace);
    }
}
catch (Exception e)
{
    Console.WriteLine("Erorr -> {0} {1}", DateTime.Now.ToString("dd mm yyyy HH:mm:ss"), e.StackTrace);
}

Answer 1

所以我明白了。这是现在为我工作的代码。我在数据库中使用不同的表进行了尝试。

问题：任何人都知道如何从excel动态读取并将数据加载到数据库中？我的意思是，动态构造INSERT命令

    [WebMethod]
    public string dictToExcel(string dict_name)
    {
        string connectionString = ConfigurationManager.ConnectionStrings["OracleConnection"].ConnectionString;
        OracleConnection connection = new OracleConnection(connectionString);

        try
        {
            connection.Open();

            OracleCommand cmd = new OracleCommand();
            cmd.Connection = connection;
            cmd.CommandText = "SELECT * from " + dict_name;
            cmd.CommandType = CommandType.Text;

            OracleDataReader dataReader = cmd.ExecuteReader();

            IWorkbook workbook;
            workbook = new XSSFWorkbook();

            ISheet sheet = workbook.CreateSheet("Sheet 1");

            int b = 0;
            while (dataReader.Read())
            {
                int n = 0;
                IRow row = sheet.CreateRow(b);
                while (n < dataReader.FieldCount)
                {
                    ICell cell = row.CreateCell(n);

                    String columnName = dataReader.GetValue(n).ToString();
                    cell.SetCellValue(columnName);

                    n++;
                }

                b++;
            }

编写OracleDataReader以优化C＃.net

1 个答案: