代码不会处理上传第二个正确MVC

-1

它工作正常，但第二次相同的文件上传第一次显示了这个错误：代码不会处理上传第二个正确MVC

The process cannot access the file 'D:....\UploadedFiles\FileName.xls' because it is being used by another process.

这里是我的代码：

public ActionResult ImportExcel1() 
{ 
    try 
    { 
     string path1 = string.Format("{0}/{1}", Server.MapPath("~/UploadedFiles"), Request.Files["FileUpload1"].FileName); 
     if (System.IO.File.Exists(path1)) { 
      System.IO.File.Delete(path1); 
     } 
     Request.Files["FileUpload1"].SaveAs(path1); 

     Excel.Application xlApp = new Excel.Application(); 
     Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(path1); 
     Excel.Worksheet xlSheet = xlWorkbook.Sheets[1]; // get first sheet 
     Excel.Range xlRange = xlSheet.UsedRange; // get the entire used range 


     int numberOfRows = xlRange.Rows.Count; 
     int numberOfCols = xlRange.Columns.Count; 

     string slNo = ""; 
     string batchCode = ""; 
     string name = ""; 
     string districtName = ""; 
     string rollNo = ""; 
     List<int> columnsToRead = new List<int>(); 

     for (int i = 1; i <= numberOfCols; i++) 
     { 
      //if (xlRange.Cells[1, i].Value2 != null) // ADDED IN EDIT 
      //{ 

       columnsToRead.Add(i); 
      //} 
     } 

     for (int j = 1; j <= numberOfRows; j++) 
     { 

      //if (xlRange.Cells[1, j].Value2 != null) // ADDED IN EDIT 
      //{ 
      //if (xlRange.Cells[1, i].Value2.ToString().Equals("Currency Code")) 
      //{ 
      // columnsToRead.Add(i); 
      //} 
      List<int> rowsToRead = new List<int>(); 
      rowsToRead.Add(j); 
      foreach (int c in columnsToRead) 
      { 
       // start at 2 because the first row is 1 and the header row 
       foreach (int r in rowsToRead) 
       { 
        //if (xlRange.Cells[r, c].Value2 != null) // ADDED IN EDIT 
        //{ 
        List<string> columnValue = new List<string>(); 
        if (xlRange.Cells[r, c].Value2 == null) // ADDED IN EDIT 
        { 
         string x = ""; 
         x = (xlRange.Cells[r, c].Value2) = ""; 
         columnValue.Add(x); 
        } 
        else { 
         columnValue.Add(xlRange.Cells[r, c].Value2.ToString()); 
        } 

        if (c.ToString() == "1") { 
         slNo = columnValue[0].ToString(); 
        } 
        if (c.ToString() == "2") { 
         batchCode = columnValue[0].PadLeft(4, '0').ToString(); 
        } 
        if (c.ToString() == "3") { 
         name = columnValue[0].ToString(); 
        } 
        if (c.ToString() == "4") { 
         districtName = columnValue[0].ToString(); 
        } 
        if (c.ToString() == "5") { 
         rollNo = columnValue[0].ToString(); 
        } 
       } 
       if (j > numberOfRows) { 
        break; 
       } 
      } 
      SaveData(slNo, batchCode, name, districtName, rollNo); 
     } 

     xlApp.Workbooks.Close(); 
    } 
    catch (Exception e) { 
    } 

    return RedirectToAction("Import"); 
}

来源

2015-10-22 CrazyCoder

感谢eidt @Dawid – CrazyCoder

不客气，下次请自己动手。用适当的语言标记标记问题也很重要。 –

您是否也听说过[switch]（https://msdn.microsoft.com/en-us/library/06tc147t.aspx）？ –

。 xls文件未正确关闭。

xlWorkbook.Close(true, Type.Missing, Type.Missing); //Close() should have 
//parameters based on your requirements. 
xlApp.Workbooks.Close();

同样使用finally块进行适当的清理。

来源

2015-10-23 06:44:00

很多人非常感谢.... :) @ Sudipta Maiti – CrazyCoder

代码不会处理上传第二个正确MVC

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