C＃エンティティフレームワークでSQLにExcelファイルをインポートする

Question

MS SQL Serverデータベースに3000行のExcelファイルをインポートする必要があります。エンティティフレームワークでC＃を使用していますが、操作は15〜20分ほど長くかかります。 何か間違っているのですか、これは正常ですか？

はここでパスがファイルをExcelにパスがどこにあるか私のコードからのforeachループです：

  foreach (var item in paths) 
      { 
       Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); 
       Microsoft.Office.Interop.Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(item.Value); 
       Microsoft.Office.Interop.Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[1]; 
       Microsoft.Office.Interop.Excel.Range xlRange = xlWorksheet.UsedRange; 
       try 
       { 

        int rowCount = xlRange.Rows.Count; 
        int colCount = xlRange.Columns.Count; 

        string GenDateString = xlRange.Cells[3, 6].Value2.ToString(); 
        string GenDate = GenDateString.Substring(0, 10); 
        string Client = xlRange.Cells[3, 1].Value2.ToString(); 
        string User = xlRange.Cells[3, 2].Value2.ToString(); 
        string error; 
        if (IsCorrectDate(item.Key, xlRange)) 
        { 
         CultureInfo provider = CultureInfo.InvariantCulture; 
         Import import = new Import() 
         { 
          Month = month, 
          year = year, 
          EndDate = item.Key[1], 
          GenerateDate = DateTime.ParseExact(GenDate, "dd.MM.yyyy", provider), 
          StartDate = item.Key[0], 
          FileName = item.Value.ToString() 
         }; 
         if (db.Imports.Any(i => i.StartDate == import.StartDate || i.EndDate == import.EndDate)) 
         { 
          try 
          { 
           progressbar.ReleaseBar(); 
          } 
          catch (Exception) 
          { 
          } 
          SAPbouiCOM.Framework.Application.SBO_Application.SetStatusBarMessage("ასეთი ფაილი უკვე შეიმპორტებულია", SAPbouiCOM.BoMessageTime.bmt_Short, true); 
          //cleanup 
          GC.Collect(); 
          GC.WaitForPendingFinalizers(); 

          //rule of thumb for releasing com objects: 
          // never use two dots, all COM objects must be referenced and released individually 
          // ex: [somthing].[something].[something] is bad 

          //release com objects to fully kill excel process from running in the background 
          Marshal.ReleaseComObject(xlRange); 
          Marshal.ReleaseComObject(xlWorksheet); 

          //close and release 
          xlWorkbook.Close(); 
          Marshal.ReleaseComObject(xlWorkbook); 

          //quit and release 
          xlApp.Quit(); 
          Marshal.ReleaseComObject(xlApp); 
          return; 
         } 
         for (int i = 8; i <= rowCount; i++) 
         { 
          Debug.WriteLine(i); 
          var bpCode = xlRange.Cells[i, 1].Value2.ToString(); 
          if (bpCode == "რეპორტის დასასრული") 
           break; 
          i++; 
          Mediator mediator = new Mediator() 
          { 
           BPCode = bpCode, 
           Import = import, 
          }; 

          for (int j = 0; j < clicks.Count(); j++) 
          { 
           progressbar.Up(); 
           rowsc--; 
           var clickName = xlRange.Cells[i + j, 1].Value2.ToString(); 
           Statistic SmeStatistic = new Statistic() 
           { 
            ClickNameID = clicks.FirstOrDefault(c => c.Name == clickName).ID, 
            ReqPerson = int.Parse(xlRange.Cells[i + j, 2].Value2.ToString()), 
            ReqBussiness = int.Parse(xlRange.Cells[i + j, 3].Value2.ToString()), 
            ResPerson = int.Parse(xlRange.Cells[i + j, 5].Value2.ToString()), 
            ResBussiness = int.Parse(xlRange.Cells[i + j, 6].Value2.ToString()), 
            Mediator = mediator, 
           }; 
           //var xxx = clicks.FirstOrDefault(c => c.Name == clickName).ID; 
           db.Statistics.Add(SmeStatistic); 

          } 
          i += clicks.Count() - 1; 
         } 
        } 
        else 
        { 
         //int iReturnValue = SAPbouiCOM.Framework.Application.SBO_Application.MessageBox(item.Value + " ფაილის თარიღი არასწორია.", 1, "&Ok"); 
         try 
         { 
          progressbar.ReleaseBar(); 
         } 
         catch (Exception) 
         { 
         } 
         SAPbouiCOM.Framework.Application.SBO_Application.SetStatusBarMessage("ფაილის თარიღები არ ემთხვევა არჩეულ პერიოდს", SAPbouiCOM.BoMessageTime.bmt_Short, true); 
         //cleanup 
         GC.Collect(); 
         GC.WaitForPendingFinalizers(); 

         //rule of thumb for releasing com objects: 
         // never use two dots, all COM objects must be referenced and released individually 
         // ex: [somthing].[something].[something] is bad 

         //release com objects to fully kill excel process from running in the background 
         Marshal.ReleaseComObject(xlRange); 
         Marshal.ReleaseComObject(xlWorksheet); 

         //close and release 
         xlWorkbook.Close(); 
         Marshal.ReleaseComObject(xlWorkbook); 

         //quit and release 
         xlApp.Quit(); 
         Marshal.ReleaseComObject(xlApp); 
         return; 
        } 
       } 
       catch (Exception ex) 
       { 
        SAPbouiCOM.Framework.Application.SBO_Application.MessageBox(ex.Message); 
       } 
       finally 
       { 
        //cleanup 
        GC.Collect(); 
        GC.WaitForPendingFinalizers(); 

        //rule of thumb for releasing com objects: 
        // never use two dots, all COM objects must be referenced and released individually 
        // ex: [somthing].[something].[something] is bad 

        //release com objects to fully kill excel process from running in the background 
        Marshal.ReleaseComObject(xlRange); 
        Marshal.ReleaseComObject(xlWorksheet); 

        //close and release // 

        //xlWorkbook.Close(); 
        Marshal.ReleaseComObject(xlWorkbook); 


        //quit and release 
        //xlApp.Quit(); 
        //Marshal.ReleaseComObject(xlApp); 
       } 

      } 

Answer 1

あなたは新しいExcelアプリケーションオブジェクト（xlApp）毎回ループサークル作成している - これは遅くなりますが。ループの前に作成して再利用できるようにしてください。

スピードアップのためにできることが他にもあるかもしれませんが、私はPanagiotisのコメントに同意する傾向があります。ここでInteropを使用しないでください。私はこのウサギの穴にも下りました、そして、JET OLEDBを使用するよりもはるかに複雑で遅いです。

using System.Data.OleDb; 

foreach (var item in paths) 
{ 
    string excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + item + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\""; 

    using (OleDbConnection excelConnection = new OleDbConnection(excelConnectionString)) 
    { 
     excelConnection.Open(); 

     DataTable dt = new DataTable(); //excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new Object[] { null, null, null, "TABLE" }); 
     string query = sheetname.Contains(" ") ? string.Format("Select * from ['{0}$']", sheetname) : string.Format("Select * from [{0}$]", sheetname); 
     using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, excelConnection)) 
     { 
      dataAdapter.Fill(dt); 
     } 

     //do something with the data here 

     excelConnection.Close(); 
    } 
}