エクセル..私はエクセルExcelと、ダウンロード中のデータを記入したい後 を

Question

をダウンロードしないと...

public void DownloadExcel(int acid, int GroupId) 
    { 
     // Working Code 
     #region DownloadExcel 
     // string sConnectionString = ConfigurationManager.ConnectionStrings["TrainingMVCContext"].ConnectionString; 
     string sConnectionString = string.Empty; 
     LoginUserDetails objLoginUserDetails = (LoginUserDetails)InsiderTrading.Common.Common.GetSessionValue((string)ConstEnum.SessionValue.UserDetails); 
     sConnectionString = objLoginUserDetails.CompanyDBConnectionString; 
     SqlConnection con = new SqlConnection(sConnectionString); 
     SqlCommand cmd = new SqlCommand(); 
     con.Open(); 
     DataTable dt = new DataTable(); 
     cmd = new SqlCommand("st_tra_NSEDownloadGroupWiseExcel", con); 
     cmd.Parameters.AddWithValue("@GroupId", GroupId); 
     cmd.CommandType = CommandType.StoredProcedure; 
     SqlDataAdapter adp = new SqlDataAdapter(cmd); 
     // ds = new DataSet(); 

     adp.Fill(dt); 


     Microsoft.Office.Interop.Excel.Range oRng; 
     Microsoft.Office.Interop.Excel.Workbook mWorkBook; 
     Microsoft.Office.Interop.Excel.Sheets mWorkSheets; 
     Microsoft.Office.Interop.Excel.Worksheet mWSheet1; 
     Microsoft.Office.Interop.Excel.Application oXL; 
     object misValue = System.Reflection.Missing.Value; 

     string directory = ConfigurationManager.AppSettings["Document"]; 

     string path = "Z:\\For Excel Demo\\Application\\InsiderTrading\\Document" + "\\" + "Stock Exchange Submission.xlsx"; 
     oXL = new Microsoft.Office.Interop.Excel.Application(); 
     oXL.Visible = true; 
     oXL.DisplayAlerts = false; 
     mWorkBook = oXL.Workbooks.Open(path, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false); 
     mWorkSheets = mWorkBook.Worksheets; 
     mWSheet1 = (Microsoft.Office.Interop.Excel.Worksheet)mWorkSheets.get_Item("Sheet1"); 
     Microsoft.Office.Interop.Excel.Range range = mWSheet1.UsedRange; 

     for (var row = 4; row <= dt.Rows.Count; row++) 
     { 
      for (var col = 0; col < dt.Columns.Count; col++) 
      { 
       mWSheet1.Cells[row + 1, col + 1].Value = dt.Rows[row - 1][col]; 
      } 
     } 

     string Filename = "Testing.xlsx"; 
     string pathTosave = (Path.Combine(directory, Filename)); 
     mWorkBook.SaveAs(pathTosave); 

     using (var memoryStream = new MemoryStream()) 
     { 
      HttpContext.Response.Clear(); 
      HttpContext.Response.Charset = ""; 
      HttpContext.Response.ContentType = "application/vnd.ms-excel"; 

      HttpContext.Response.AddHeader("Content-Disposition", "inline;filename=" + pathTosave); 
      System.Text.StringBuilder strHTMLContent = new System.Text.StringBuilder(); 
      //strHTMLContent.Append(LetterHTMLContent); 
      HttpContext.Response.Write(strHTMLContent); 
      HttpContext.Response.End(); 
      HttpContext.Response.Flush(); 


     } 
     mWorkBook.Close(); 
     mWSheet1 = null; 
     mWorkBook = null; 
     oXL.Quit(); 
     GC.WaitForPendingFinalizers(); 
     GC.Collect(); 
     GC.WaitForPendingFinalizers(); 
     GC.Collect(); 





     #endregion DownloadExcel 
    } 

コードですが、それはライン

mWorkBook = oXL.Workbooks.Open(path, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false); 

エラーMSGなどのためにエラーになります続く -

InsiderTrading.dllで 'System.Runtime.InteropServices.COMException'タイプの例外が発生しましたが、ユーザコード

で処理されませんでした

どうすればいいですか？ヘルプヘルプ

Answer 1

なぜ、ライブラリを使用しないでください "LinqToExcell"は、すべての配管作業を行うのですか？

https://www.codeproject.com/Articles/659643/Csharp-Query-Excel-and-CSV-Files-Using-LinqToExcel

ちょうどあなたのコントローラに次のコードを使用してファイルをアップロードします。ブラウザは、あなたがアップロードしたファイルの場所（セキュリティ目的）にアクセスすることはできませんので、あなたのアプリケーションでファイルを保存する必要があります、注意してください：....

#region ImportExcell 

    public ActionResult ImportExcel() 
    { 
     return View(); 
    } 

    [HttpPost] 
    public ActionResult ImportExcel(HttpPostedFileBase upload, FormCollection fc) 
    { 
     var v = System.Web.HttpContext.Current.Request.Files["upload"]; 
     string contentType = upload.ContentType; 

     FileInfo fInfo = new FileInfo(upload.FileName); 

     //I am only allowing this kind of excel file. I got this from HttpPostedFileBase during debuging and checking content 
     if (!contentType.Contains(@"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")) 
     { 
      ModelState.AddModelError("", string.Format("This is not a valid file. This is '{0}'", contentType)); 
      return View(); 
     } 

     var fileName = upload.FileName; 

     //This is my temporary saving spot in my application 
     var filePathSaveTo = Server.MapPath(@"/Upload/ExcelFile"); 
     string savedFileName = Path.Combine(filePathSaveTo, fileName); 

     //Now we need to save the file in a temp spot so we can access it later 
     upload.SaveAs(savedFileName); 

     try 
     { 
      string returnMsg = _fileDocDAL.LoadFromExcel(savedFileName); 
      ModelState.AddModelError("", string.Format("Done! " + returnMsg)); 

     } 
     catch (Exception e) 
     { 
      string error = AliKuli.Utilities.ExceptionNS.ErrorMsgClass.GetInnerException(e); 
      ModelState.AddModelError("", string.Format(error)); 

     } 

     return View(); 


    } 

    #endregion 

そして、あなたのビューを

@model ModelsClassLibrary.Models.Documents.FilesNS.FilesDocImportVM 


@using (Html.BeginForm("ImportExcel", "FileDocs", null, FormMethod.Post, new { enctype = "multipart/form-data" })) 
{ 
    @Html.AntiForgeryToken() 


    <div class="form-horizontal"> 

     @Html.ValidationSummary(true, "", new { @class = "text-danger" }) 


     <div class="panel panel-info"> 
      <div class="panel-heading"> 
       Required Fields 
      </div> 
      <div class="panel-body"> 

       <div class="form-group"> 
        @Html.Label("Excel File", new { @class = "control-label col-md-2" }) 

        <div class="col-md-10"> 
         <input type="file" multiple="multiple" name="upload" id="front" /> 
        </div> 

       </div> 

       <div class="form-group"> 
        <div class="col-md-10"> 
         <input type="submit" value="Upload" class="btn btn-success" /> | 
         @Html.ActionLink("Back to List", "Index") 
        </div> 
       </div> 
      </div> 
     </div> 
    </div> 
} 

私のモデルは以下の通りですが、Excelシートのデータと同じようにモデルを作成する必要があります。これは、すべてのLinqToExcell

namespace ModelsClassLibrary.Models.Documents.FilesNS 
{ 
    //[NotMapped] 
    public class FilesDocImportVM 
    { 
     public FilesDocImportVM() 
     { 
      FileId = -1; 
     } 
#region Files 
    /// <summary> 
    /// The file number's ID 
    /// </summary> 
    public int FileId { get; set; } 

    /// <summary> 
    /// This is the file number that the user sees. 
    /// </summary> 
    public string FileNo { get; set; } 

    /// <summary> 
    /// This is the name of the file 
    /// </summary> 
    public string Description { get; set; } 


    /// <summary> 
    /// This is the parent's ID. 0 means no ID 
    /// </summary> 
    public int ParentId { get; set; } 

#endregion 

    public int GetFileNumberFromOldFileNumber() 
    { 
     if (FileNo.IsNullOrEmpty() || FileId == -1 || Description.IsNullOrEmpty()) 
      throw new Exception(string.Format("Proper Data not received. Record is {0}.FilesDocImportVM.GetFileNumberFromOldFileNumber ", this.ToString())); 


     return new FileDoc().GetFileNumberFromOldFileNumber(FileNo); 
    } 

    public void SelfErrorCheck() 
    { 
     if(FileId == -1 || FileNo.IsNullOrEmpty() || Description.IsNullOrEmpty()) 
      throw new Exception(string.Format("Proper Data not received. Record is {0}. FilesDocImportVM.SelfErrorCheck", this.ToString())); 

    } 
#region Category 
    /// <summary> 
    /// This is the categories ID 
    /// </summary> 
    public int CategoryId { get; set; } 


    /// <summary> 
    /// This is the name of the category 
    /// </summary> 
    public string CategoryName { get; set; } 
#endregion 

    public override string ToString() 
    { 
     return string.Format("FileId: {0}, FileNo: {1}, Description: {2}, ParentId: {3}, CategoryId: {4}, CategoryName: {5}", 
      FileId, 
      FileNo, 
      Description, 
      ParentId, 
      CategoryId, 
      CategoryName); 
    } 

    } 
} 

アップロードコードは非常に単純ですのドキュメントに説明されてい...これはこれは私がLinqToExcelをラップするために書いたラッパーコードである

public string LoadFromExcel(string excelFileName) 
    { 
     int noOfFiles = 0; 
//*** NOTE - The line below is the code to import from Excel. I have wrapped it a bit to make it simple... the wrapper is below. The code after this line is just for fixing and checking the data. 
     var excelFile = AliKuli.Utilities.ExcellUtility.ImportFromExcelWithHeader(excelFileName, "AliKuliFiles"); 
     if (excelFile.IsNullOrEmpty()) 
      throw new Exception(string.Format("Utility Class failed to load. FileDocsDAL.LoadFromExcel")); 

     string totalFilesMsg = string.Format("Total Orignal Files: {0}", excelFile.Count()); 

     var dataArray = excelFile.OrderBy(x => x.FileId).ToList(); 

     if (dataArray.IsNullOrEmpty()) 
      throw new Exception(string.Format("Data array failed to load. FileDocsDAL.LoadFromExcel")); 

     CheckTheData(dataArray); 

     //first make the categories 
     User theUser = Get_User(); 

     string temp = ""; 
     if (noOfFiles == 324) 
      temp = "Found"; 

     CreateCategories(dataArray, theUser); 
     CreateAndSaveFile(ref noOfFiles, dataArray, theUser); 

     //now add the parents 
     SaveTheParents(); 

     totalFilesMsg += " Counted: " + noOfFiles; 
     //CreateFileWithCategory(dataArray, admin); 
     return totalFilesMsg; 
    } 

使用されているコードがあります

public static class ExcellUtility 
{ 

    /// <summary> 
    /// This will read in the excel file such that it will stringify the cols of each row. 
    /// Example. If there are 3 cols, the the first 3 entries will be for col 0, then 1, then Col 2, 
    /// then... the 4th entry will again be col1 
    /// </summary> 
    /// <param name="fileName"></param> 
    /// <returns></returns> 
    public static List<FilesDocImportVM> ImportFromExcelWithHeader(string excelFileName, string sheetName) 
    { 

     ExcelUtilityClass euc; 
     ExcelQueryFactory excel; 
     MakeExcelUtilityClass(excelFileName, out euc, out excel); 

     //This creates a IQueriable<FilesDocImportVM> 
     var data = from c in excel.Worksheet<FilesDocImportVM>(sheetName) select c; 
     var colNames = excel.GetColumnNames(sheetName).ToArray(); 

     var datalist = data.ToList(); 

     return datalist; 

    } 

    private static void MakeExcelUtilityClass(string excelFileName, out ExcelUtilityClass euc, out ExcelQueryFactory excel) 
    { 
     if (excelFileName.IsNullOrEmpty()) 
      throw new Exception("No Excel File Name Passed"); 

     euc = new ExcelUtilityClass(); 
     excel = new ExcelQueryFactory(excelFileName); 
    } 
    } 
} 

はそれがあるよりも複雑に見える...アップロード部分は簡単だった - ラッパーを書いた後、コードのちょうど約1行。

幸運。