您好我正在使用 EPPlus 来创建带有一些数据转储的xslx文件。它可以在本地计算机上以及在Web服务器上完美地处理少量数据。
但我有一个案例，我在数据集中有40,000行。它再次在本地机器上完美运行。
但在服务器上它正在创建文件，当我尝试打开该文件时，它显示文件已损坏的错误。我尝试用记事本编辑文件，发现它里面有HTML内容。
我正在使用此代码：
public static void CreateExcel(string file_Name, DataSet ds)
{
// rowsPerSheet = 50000;
string msg = "";
string Type = "";
using (ExcelPackage pck = new ExcelPackage()) {
//Create the worksheet
ExcelWorksheet ws = default(ExcelWorksheet);
int clCnt = 1;
foreach (DataTable tbl in ds.Tables) {
ws = pck.Workbook.Worksheets.Add(tbl.TableName);
//Load the datatable into the sheet, starting from cell A1. Print the column names on row 1
ws.Cells("A1").LoadFromDataTable(tbl, true);
if (tbl.Rows.Count != 0) {
clCnt = 1;
foreach (DataColumn col in tbl.Columns) {
ws.Column(clCnt).AutoFit();
// format all dates in german format (adjust accordingly)
if (col.DataType.Equals(typeof(System.DateTime))) {
dynamic colNumber = col.Ordinal + 1;
ExcelRange range = ws.Cells(2, colNumber, tbl.Rows.Count + 1, colNumber);
range.Style.Numberformat.Format = "MM/dd/yyyy";
}
if (col.DataType.Equals(typeof(System.Decimal)) || col.DataType.Equals(typeof(System.Double))) {
dynamic colNumber = col.Ordinal + 1;
ExcelRange range = ws.Cells(2, colNumber, tbl.Rows.Count + 1, colNumber);
range.Style.Numberformat.Format = "0.00";
}
clCnt += 1;
}
}
}
file_Name = file_Name.Replace(" ", "_") + ".xlsx";
HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
HttpContext.Current.Response.AddHeader("content-disposition", "attachment; filename=" + file_Name + "");
HttpContext.Current.Response.BinaryWrite(pck.GetAsByteArray());
HttpContext.Current.Response.End();
}
}
父功能：
private void GenerateReport()
{
string msg = "";
string output = "where";
int count = 0;
string jsscript = "";
string _FID = "";
if ((ddlPortfolio.SelectedValue <= 0 & grvforecast.Rows.Count <= 0)) {
jsscript = "<script>alert('Please select potfolio')</script>";
this.Page.ClientScript.RegisterStartupScript(Page.GetType, "jsclose", jsscript);
} else if ((grvforecast.Rows.Count <= 0)) {
jsscript = "<script>alert('Please add some entry in grid')</script>";
this.Page.ClientScript.RegisterStartupScript(Page.GetType, "jsclose", jsscript);
} else {
if (btnValue.Value == "Cash/GAAP Report") {
_SqlStr = "[USP_CashGaapReport] '";
foreach (GridViewRow row in grvforecast.Rows) {
if ((count < grvforecast.Rows.Count - 1)) {
_SqlStr += "" + grvforecast.Rows(count).Cells(1).Text + ",";
} else {
_SqlStr += "" + grvforecast.Rows(count).Cells(1).Text + "";
}
count = count + 1;
}
_SqlStr += "'";
} else {
if ((btnValue.Value == "Forecast Attribute Report")) {
_SqlStr = "SELECT f.AttributeSetID as AttributeSetID , Attribute_Set.TabName as AttributeSetName FROM Forecast_Account as f INNER JOIN Attribute_Set ON f.AttributeSetID = Attribute_Set.AttributeSetID where ";
} else if ((btnValue.Value == "Forecast Data Report")) {
_SqlStr = "SELECT p.LegalEntityName AS Portfolio, f.Name, c.AccountName, a.RepeatNumber, d.CashGAAP, d.TheDate, SUM(d.Amount) AS Amount, d.LastUpdated, d.UpdatedBy ";
_SqlStr += "FROM dbo.Portfolio AS p INNER JOIN dbo.Forecast AS f ON p.PortfolioID = f.PortfolioID INNER JOIN dbo.Forecast_Account AS a ON f.ForecastID = a.ForecastID ";
_SqlStr += "INNER JOIN dbo.Forecast_Data AS d ON a.ForecastAccountID = d.ForecastAccountID INNER JOIN dbo.CoA AS c ON c.AccountNumber = a.AccountNumber where ";
} else {
// _SqlStr = "SELECT Portfolio, Name, AccountName, CashGAAP, OriginalDate, sum(Amount) as Amount, AccountNumber, AttributeSetName, TheDate, Year"
// _SqlStr &= " FROM (SELECT Portfolio.LegalEntityName AS Portfolio, f.Name, CoA.AccountName, Forecast_Data.CashGAAP, CONVERT(date, Forecast_Data.TheDate) AS OriginalDate,"
// _SqlStr &= " SUM(Forecast_Data.Amount) AS Amount, CoA.AccountNumber, Attribute_Set.AttributeSetName, '' + CONVERT(varchar, YEAR(Forecast_Data.TheDate))"
// _SqlStr &= " + '-' + CONVERT(varchar, MONTH(Forecast_Data.TheDate)) + '-01' AS TheDate, YEAR(Forecast_Data.TheDate) AS Year, Forecast_Attribute.Value"
// _SqlStr &= " FROM Portfolio INNER JOIN Forecast AS f ON Portfolio.PortfolioID = f.PortfolioID INNER JOIN Forecast_Account ON f.ForecastID = Forecast_Account.ForecastID INNER JOIN Forecast_Data ON"
// _SqlStr &= " Forecast_Account.ForecastAccountID = Forecast_Data.ForecastAccountID INNER JOIN CoA ON CoA.AccountNumber = Forecast_Account.AccountNumber"
// _SqlStr &= " INNER JOIN Attribute_Set ON CoA.AttributeSetID = Attribute_Set.AttributeSetID INNER JOIN Forecast_Attribute ON Forecast_Account.ForecastAccountID = Forecast_Attribute.ForecastAccountID WHERE"
_SqlStr = "SELECT Portfolio, Name, AccountName, CashGAAP, OriginalDate, sum(Amount) as Amount, d.AccountNumber as AccountNumber, AttributeSetName, TheDate, Year";
_SqlStr += " FROM (SELECT Portfolio.LegalEntityName AS Portfolio, f.Name, CoA.AccountName, Forecast_Data.CashGAAP, CONVERT(date, Forecast_Data.TheDate) AS OriginalDate,";
_SqlStr += " SUM(Forecast_Data.Amount) AS Amount, CoA.AccountNumber, Attribute_Set.AttributeSetName, '' + CONVERT(varchar, YEAR(Forecast_Data.TheDate))";
_SqlStr += " + '-' + CONVERT(varchar, MONTH(Forecast_Data.TheDate)) + '-01' AS TheDate, YEAR(Forecast_Data.TheDate) AS Year, Forecast_Attribute.Value";
_SqlStr += " FROM Portfolio INNER JOIN Forecast AS f ON Portfolio.PortfolioID = f.PortfolioID INNER JOIN Forecast_Account ON f.ForecastID = Forecast_Account.ForecastID INNER JOIN Forecast_Data ON";
_SqlStr += " Forecast_Account.ForecastAccountID = Forecast_Data.ForecastAccountID INNER JOIN CoA ON CoA.AccountNumber = Forecast_Account.AccountNumber";
_SqlStr += " INNER JOIN Attribute_Set ON CoA.AttributeSetID = Attribute_Set.AttributeSetID INNER JOIN Forecast_Attribute ON Forecast_Account.ForecastAccountID = Forecast_Attribute.ForecastAccountID WHERE";
}
foreach (GridViewRow row in grvforecast.Rows) {
if ((count < grvforecast.Rows.Count - 1)) {
_SqlStr += " f.ForecastID=" + grvforecast.Rows(count).Cells(1).Text + " or";
_FID += " a.ForecastID=" + grvforecast.Rows(count).Cells(1).Text + " or";
} else {
_SqlStr += " f.ForecastID=" + grvforecast.Rows(count).Cells(1).Text + " ";
_FID += " a.ForecastID=" + grvforecast.Rows(count).Cells(1).Text + " ";
}
count = count + 1;
}
if ((btnValue.Value == "Forecast Data Report")) {
_SqlStr += "GROUP BY p.LegalEntityName, f.Name, c.AccountName, a.RepeatNumber, d.CashGAAP, d.TheDate, d.LastUpdated, d.UpdatedBy";
} else if ((btnValue.Value == "Cash/GAAP Report")) {
_SqlStr += " GROUP BY Portfolio.LegalEntityName, f.Name, CoA.AccountName, Forecast_Data.CashGAAP, Forecast_Data.TheDate, CoA.AccountNumber, Attribute_Set.AttributeSetName, Forecast_Attribute.Value) AS d LEFT OUTER JOIN Vendor ON d.Value = Vendor.VendorName";
_SqlStr += " GROUP BY d.OriginalDate, d.TheDate, d.AccountNumber, d.Portfolio, d.Name, d.AccountName, d.CashGAAP, d.AttributeSetName, d.Year, Vendor.VendorName";
// _SqlStr &= " GROUP BY Portfolio.LegalEntityName, f.Name, CoA.AccountName, Forecast_Data.CashGAAP, Forecast_Data.TheDate, CoA.AccountNumber, Attribute_Set.AttributeSetName, Forecast_Attribute.Value) AS d"
// _SqlStr &= " Group BY OriginalDate,TheDate,AccountNumber,Portfolio,Name,AccountName,CashGAAP,AttributeSetName,Year"
}
}
try {
if ((btnValue.Value != "Forecast Attribute Report")) {
_ds = new DataSet();
_dtTable = myDB.ExecuteDatatable(CommandType.Text, _SqlStr, null);
_dtTable.TableName = btnValue.Value.Replace("_", " ");
_ds.Tables.Add(_dtTable);
} else {
_ds = new DataSet();
_SqlStr += "Group by f.AttributeSetID,Attribute_Set.TabName ";
_dtTable = myDB.ExecuteDatatable(CommandType.Text, _SqlStr, null);
foreach (DataRow _dr in _dtTable.Rows) {
_SqlStr = "[USP_Forecast_Attributes] " + _dr["AttributeSetID"].ToString() + ",'" + _FID + "'";
_dtTable = myDB.ExecuteDatatable(CommandType.Text, _SqlStr, null);
_dtTable.TableName = _dr["AttributeSetName"].ToString();
_ds.Tables.Add(_dtTable);
}
}
if ((_ds != null)) {
if (DateAndTime.Now.IsDaylightSavingTime()) {
strTime = System.DateTime.UtcNow.AddHours(-5).ToString("_MM_dd_yyyy_hh_mm_tt");
} else {
strTime = System.DateTime.UtcNow.AddHours(-4).ToString("_MM_dd_yyyy_hh_mm_tt");
}
if (btnValue.Value != "Forecast Attribute Report") {
epXL.CreateExcel(btnValue.Value, _ds);
//epXL.ExportToExcel(_dtTable, btnValue.Value)
} else {
epXL.CreateExcel(btnValue.Value, _ds);
// & strTime, _ds)
}
}
} catch (Exception ex) {
jsscript = "<script>alert('Report not generated')</script>";
this.Page.ClientScript.RegisterStartupScript(Page.GetType, "jsclose", jsscript);
}
}
}
修改 现在我收到了确切的错误：
System.IO.IsolatedStorage.IsolatedStorageException: Unable to create mutex. (Exception from HRESULT: 0x80131464)
at System.IO.IsolatedStorage.IsolatedStorageFile.Open(String infoFile, String syncName)
at System.IO.IsolatedStorage.IsolatedStorageFile.Lock(Boolean& locked)
at System.IO.IsolatedStorage.IsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, IsolatedStorageFile isf)
at MS.Internal.IO.Packaging.PackagingUtilities.SafeIsolatedStorageFileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, ReliableIsolatedStorageFileFolder folder)
at MS.Internal.IO.Packaging.PackagingUtilities.CreateUserScopedIsolatedStorageFileStreamWithRandomName(Int32 retryCount, String& fileName)
at MS.Internal.IO.Packaging.SparseMemoryStream.SwitchModeIfNecessary()
at MS.Internal.IO.Packaging.SparseMemoryStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at MS.Internal.IO.Packaging.CompressEmulationStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at MS.Internal.IO.Packaging.CompressStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at MS.Internal.IO.Zip.ProgressiveCrcCalculatingStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at MS.Internal.IO.Zip.ZipIOModeEnforcingStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
at System.IO.StreamWriter.Write(String value)
at System.IO.TextWriter.Write(String format, Object arg0)
at OfficeOpenXml.ExcelWorksheet.UpdateRowCellData(StreamWriter sw)
at OfficeOpenXml.ExcelWorksheet.SaveXml()
at OfficeOpenXml.ExcelWorksheet.Save()
at OfficeOpenXml.ExcelWorkbook.Save()
at OfficeOpenXml.ExcelPackage.GetAsByteArray(Boolean save)
at OfficeOpenXml.ExcelPackage.GetAsByteArray()
我无法解决它。请建议。 感谢
答案 0 :(得分：1)
我认为您的网页存在设计问题。至少，快速解决方法是在将文档写入Response之前添加此内容。
HttpContext.Current.Response.Clear();
当您在输出中有响应时，表示它尝试呈现页面，在其中，您尝试执行其他操作，在这种情况下编写文件。 （以How can I return a pdf from a web request in ASP.NET?为例）。
我们必须看到更多代码才能完全检查这一点，但我想你不会使用HttpHandler来推荐这个。
public class DownloadFileHandler : IHttpHandler
{
public bool IsReusable
{
get { return true; }
}
public void ProcessRequest(HttpContext context)
{
Response.BinaryWrite(...);
}
}
答案 1 :(得分：0)
现在我遇到了你的问题。 我认为这是由于服务器上的写权限问题。 通常，ASP.net用户在Application文件夹之外没有写权限。 这里有两个链接可能会帮到你。