某些Excel文件未从共享路径移动到SQL Server

Question

我们有一个应用程序,其中Excel文件中的数据(存在于共享路径中)移动到数据库.如果有任何错误,文件将通过在日志文件中写入错误来移动到错误文件夹.它使用Windows服务进行操作.

有时文件没有任何错误仍然通过写入日志移动到错误文件夹External table is not in the expected format.但是同一文件再次上传一次或多次,它移动到数据库没有任何错误.

Windows服务,DB和共享路径都存在于XP Server中.这些年来应用程序运行良好.但是在最近几天,几乎每个文件都出现了上述问题.

我们也安装了Microsoft 2003,2007,2012办公组件和访问引擎.但问题仍然存在.

我在提到下面的Windows服务代码.请帮忙.提前致谢.

using System.IO;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Data.Common;

namespace Impexp_Service
{
    public partial class Service1 : ServiceBase
    {
        System.Timers.Timer T1 = new System.Timers.Timer();
        public Service1()
        {
            InitializeComponent();
        }

        protected override void OnStart(string[] args)
          {
            ///start
            ///

            {
                SqlConnection strconnection = new SqlConnection();
                strconnection.ConnectionString = @"Data Source=XXXXXX;Initial Catalog=XXXX;User ID=XX;Password=XXXXXX;";
                strconnection.Open();
                // To get the all files placed at the shared path
                DirectoryInfo directory = new DirectoryInfo(@"D:\Impexp\Data\");
                FileInfo[] files = directory.GetFiles("*.xlsx");



                foreach (var f in files)
                {
                    string path = f.FullName;

                    // TO establish connection to the excel sheet
                    string excelConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\";";
                    //Create Connection to Excel work book
                    OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);



                    excelConnection.Open();
                    //Create OleDbCommand to fetch data from Excel
                    OleDbCommand cmd = new OleDbCommand("Select * from [Report$]", excelConnection);

                    DbDataReader dr = cmd.ExecuteReader();
                    // OleDbDataReader dReader;
                    // dReader = cmd.ExecuteReader();
                    SqlBulkCopy sqlBulk = new SqlBulkCopy(strconnection);
                    //Give your Destination table name
                    sqlBulk.DestinationTableName = "imp_master_test";
                    sqlBulk.WriteToServer(dr);

                    excelConnection.Close();

                    File.Delete(path);




                    // To move error files to the error folder



                    /// end


                    T1.Interval = 20000;
                    T1.Enabled = true;
                    T1.Start();

                    T1.Elapsed += new System.Timers.ElapsedEventHandler(T1_Elapsed);
                }
            }
    }


        void T1_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            T1.Enabled = false;
            try
            {
                SqlConnection strconnection = new SqlConnection();
                strconnection.ConnectionString = @"Data Source=10.91.XXXXXX;Initial Catalog=XXXXX;User ID=XXXXX;Password=XXXXX;";
                strconnection.Open();
                // To get the all files placed at the shared path
                DirectoryInfo directory = new DirectoryInfo(@"D:\Impexp\Data\");
                FileInfo[] files = directory.GetFiles("*.xlsx");



                foreach (var f in files)
                {
                    string path = f.FullName;

                    // TO establish connection to the excel sheet
                    string excelConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\";";
                    //Create Connection to Excel work book
                    OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);

                try
                {
                    excelConnection.Open();
                    //Create OleDbCommand to fetch data from Excel
                    OleDbCommand cmd = new OleDbCommand("Select * from [Report$]", excelConnection);

                    DbDataReader dr = cmd.ExecuteReader();
                    // OleDbDataReader dReader;
                    // dReader = cmd.ExecuteReader();
                    SqlBulkCopy sqlBulk = new SqlBulkCopy(strconnection);
                    //Give your Destination table name
                    sqlBulk.DestinationTableName = "imp_master_prod";
                    sqlBulk.WriteToServer(dr);

                    excelConnection.Close();

                    File.Delete(path);



                }
                // To move error files to the error folder
                catch (Exception exp)
                {

                    excelConnection.Close();
                    File.Move(path, Path.Combine(@"D:\Impexp\error\", f.Name));
                    string path1 = @"D:\Impexp\error\error.txt";
                    if (File.Exists(path1))
                    {
                        // Create a file to write to. 
                        using (StreamWriter sw = File.AppendText(path1))
                        {
                            sw.WriteLine("File : " + path + " : " + exp.Message);
                            sw.Flush();

                        }
                    }


                        T1.Enabled = true;
                        T1.Start();

                    }
                }
                strconnection.Close();

            // End of TRY 1

            }
            catch (UnauthorizedAccessException UAEx)
            {
                string path1 = @"D:\Impexp\error\error.txt";
                if (File.Exists(path1))
                {
                    // Create a file to write to. 
                    using (StreamWriter sw = File.AppendText(path1))
                    {
                        sw.WriteLine(UAEx.Message);
                        sw.Flush();

                    }
                }
                T1.Enabled = true;
                T1.Start();
            }
            catch (PathTooLongException PathEx)
            {
                string path1 = @"D:\Impexp\error\error.txt";
                if (File.Exists(path1))
                {
                    // Create a file to write to. 
                    using (StreamWriter sw = File.AppendText(path1))
                    {
                        sw.WriteLine(PathEx.Message);
                        sw.Flush();

                    }
                }
                T1.Enabled = true;
                T1.Start();
            }
            T1.Enabled = true;
            T1.Start();


        }

        protected override void OnStop()
        {
        }
    }
}

Answer 1

看看这个问题，这似乎是读取 Excel 文件的问题，而不是 SQL 表的问题。尝试更改 Excel 连接字符串。

string excelConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\";";

到

string excelConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;HDR=Yes;IMEX=1\";

另外，看看另一个答案，根本原因可能是上传较新版本的 Excel。