我想在excel中填充数据并下载excel .. 以下是代码..
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
}
但它给出了行
的错误 mWorkBook = oXL.Workbooks.Open(path, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);
错误消息如下 -
类型＆＃39; System.Runtime.InteropServices.COMException＆＃39;的例外情况发生在InsiderTrading.dll中但未在用户代码中处理
我该怎么做..帮助
答案 0 :(得分：0)
为什么不使用图书馆，“LinqToExcell”来做所有的管道工作？
https://www.codeproject.com/Articles/659643/Csharp-Query-Excel-and-CSV-Files-Using-LinqToExcel
只需使用控制器中的以下代码上传文件即可。请注意，您需要将文件保存在应用程序中，因为浏览器不允许您访问上传文件的位置（出于安全目的）：
#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
你的观点......
@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>
}
我的模型如下所示，但您需要使您的模型与Excel工作表中的数据一样。这些都在LinqToExcell的文档中进行了解释
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);
}
}
}
上传代码非常简单......这是使用的代码
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;
}
这是我编写的用于包装LinqToExcel
的包装器代码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);
}
}
}
看起来比它复杂......上传部分很简单 - 在编写包装器后只需要一行代码。
祝你好运。