A CSV file containing Japanese characters (UTF-8 characterset) is created from server-side using ASP.NET.
Code:
public void ExportToCsv_Click(object sender, EventArgs e)
{
try
{
string sContents = string.Empty;
string sTemp;
for (int k = 1; k <= (ObjList.Columns.Count - 1); k++)
{
sContents += ObjList.HeaderRow.Cells[k].Text + ",";
}
sContents += "\r\n";
for (int i = 0; i <= (ObjList.Rows.Count - 1); i++)
{
for (int j = 1; j <= (ObjList.Columns.Count - 1); j++)
{
sTemp = (ObjList.Rows[i].Cells[j].Text.ToString());
if (sTemp == " ")
sTemp = "";
if (j < ObjList.Columns.Count - 1)
sTemp = (sTemp + ",");
sContents += sTemp;
}
sContents += "\r\n";
}
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.AddHeader("Content-disposition", "attachment; filename=" + "partslist.csv");
Response.ContentType = "application/csv";
Response.Charset = "UTF-8";
Response.ContentEncoding = System.Text.Encoding.UTF8 ;
Response.Write(sContents);
Response.Flush();
Response.End();
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
But, when this file is opened in Microsoft Excel 2003, it does not show file contents properly.
How to make excel to open such a file properly.
Help will be appreciated.
Just add \xfeff at the beginning.
Follow this procedure :
Menu -> Data -> GetExternal Data -> From Text
Select your csv using the file dialog
In the text import wizard, step 1, select "65001 : Unicode (UTF-8)" as file origin.
Excel uses SJIS(Shift JIS) as default encoding.
You could try converting UTF-8 to SJIS or creating CSV file with BOM in UTF-8.
I was able to open UTF-8 csv file with BOM.
Related
I'm using a filestream object to push a report in excel format from our DB, and it works fine for reports that are reasonable in terms the number of rows, however there's one report that has over 15K rows and the site times out after 20 minutes - I know I could increase the timeout, but even 20 minutes is unaccaptable right now. Is there any way to speed things up? Here is my current code:
string path = Server.MapPath(#"~\");
string sourceName = Path.Combine(path, "Demo", "Report_Template", templateName);
string newFileName = Path.Combine(Global.demo_data_directory, #"Reports", #"Demo Download Activity Report.xlsx"); // Path.Combine(path, "Demo_Data", "Reports", Filename + ".xlsx");
string copyresults = Utilities.CopyFile(sourceName, newFileName);
if (copyresults != "Copied file")
{
DemoDAL.ErrorLog("GenerateDownloadActivityReportFile.Page_Load: Copy Error - " + copyresults);
}
else
{
document = SpreadsheetDocument.Open(newFileName, true);
wbPart = document.WorkbookPart;
DataTable datatbl = (DataTable)Session["gvPOC"];
CreateReport(datatbl);
// ADDED THIS *********************************************************************************************************
//wbPart.Workbook.Save();
using (FileStream fsSource = new FileStream(newFileName, FileMode.Open, FileAccess.Read, FileShare.Read, 10240))
{
// Read the source file into a byte array.
byte[] bytes = new byte[fsSource.Length];
int numBytesToRead = (int)fsSource.Length;
int numBytesRead = 0;
while (numBytesToRead > 0)
{
// Read may return anything from 0 to numBytesToRead.
int n = fsSource.Read(bytes, numBytesRead, numBytesToRead);
// Break when the end of the file is reached.
if (n == 0)
break;
numBytesRead += n;
numBytesToRead -= n;
}
numBytesToRead = bytes.Length;
StreamFileToBrowser(newFileName, bytes);
}
File.Delete(newFileName);
}
public void StreamFileToBrowser(string sfilename, byte[] fileBytes)
{
try
{
Response.Clear();
Response.ClearHeaders();
Response.AppendHeader("Content-disposition", String.Format("attachment; filename=\"{0}\"", System.IO.Path.GetFileName(sfilename)));
Response.AppendHeader("Content-Type", "binary/octet-stream");
Response.AppendHeader("Content-length", fileBytes.Length.ToString());
Response.BinaryWrite(fileBytes);
if (Response.IsClientConnected)
Response.Flush();
}
catch (Exception ex)
{
DemoDAL.ErrorLog("StreamFileToBrowser: " + ex.Message);
}
}
I have this code to export my GridViews to Excel, it works in localhost but after deploying it does not work. The error I received upon clicking my export button is Runtime Error.
protected void EXPORT_BUTTON_Click(object sender, EventArgs e)
{
Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();
// creating new WorkBook within Excel application
Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);
String DATA1 = "DATA1";
String DATA2 = "DATA2";
ExportToExcel(app, workbook, DATA_1, DATA1);
workbook.Worksheets["Sheet1"].Delete();
workbook.Worksheets["Sheet2"].Delete();
workbook.Worksheets["Sheet3"].Delete();
ExportToExcel(app, workbook, DATA_2, DATA2);
string FolderPath = ServerName + DirectoryLocation + DirectoryFolder + ExportsFolder;
var filename = #"EXCEL_" + datetime.ToString("dd-MM-yyyy_hh-mm-ss") + ".xlsx";
workbook.SaveAs(FolderPath + filename, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
workbook.Close();
app.Quit();
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("content-disposition", "attachment; filename=" + filename + ";");
Response.TransmitFile(FolderPath + filename);
Response.Flush();
Response.End();
}
public void ExportToExcel(Microsoft.Office.Interop.Excel._Application app, Microsoft.Office.Interop.Excel._Workbook workbook, GridView gridview, string SheetName)
{
// see the excel sheet behind the program
app.Visible = false;
Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets.Add();
// changing the name of active sheet
worksheet.Name = SheetName;
// storing header part in Excel
for (int i = 1; i < gridview.Columns.Count + 1; i++)
{
worksheet.Cells[1, i] = gridview.Columns[i - 1].HeaderText;
}
// storing Each row and column value to excel sheet
for (int i = 0; i < gridview.Rows.Count - 1; i++)
{
for (int j = 0; j < gridview.Columns.Count; j++)
{
worksheet.Cells[i + 2, j + 1] = gridview.Rows[i].Cells[j].Text.ToString();
}
}
}
I solved my question using EPPLUS, EPPlus is a .net library that reads and writes Excel 2007/2010 files using the Open Office Xml format (xlsx). It does not require excel to be installed on the server machines. thanks.
The codes below is an reference:
protected void ExportToExcel_Click(object sender, EventArgs e)
{
var products = GetProducts();
GridView1.DataSource = products;
GridView1.DataBind();
ExcelPackage excel = new ExcelPackage();
var workSheet = excel.Workbook.Worksheets.Add("Products");
var totalCols = GridView1.Rows[0].Cells.Count;
var totalRows = GridView1.Rows.Count;
var headerRow = GridView1.HeaderRow;
for (var i = 1; i <= totalCols; i++ )
{
workSheet.Cells[1, i].Value = headerRow.Cells[i - 1].Text;
}
for (var j = 1; j <= totalRows; j++ )
{
for (var i = 1; i <= totalCols; i++)
{
var product = products.ElementAt(j-1);
workSheet.Cells[j + 1, i].Value = product.GetType().GetProperty(headerRow.Cells[i - 1].Text).GetValue(product, null);
}
}
using (var memoryStream = new MemoryStream())
{
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("content-disposition", "attachment; filename=products.xlsx");
excel.SaveAs(memoryStream);
memoryStream.WriteTo(Response.OutputStream);
Response.Flush();
Response.End();
}
}
'Microsoft.Office.Interop.Excel' means that Microsoft Office Runtime must be installed to make this code work.
Exporting data using Microsoft.Office.Interop.Excel is avoided, since it needs application installation on server, is poorly scalable, and is against MS Office licence conditions.
I suggest other ways, like text-csv exporting that will meet better performance on a server.
protected void EXPORT_BUTTON_Click(object sender, EventArgs e)
{
...
StringBuilder sb = new StringBuilder();
// storing header part in Excel
for (int i = 1; i < gridview.Columns.Count + 1; i++)
{
sb.Append (gridview.Columns[i - 1].HeaderText);
stringBuilder.Append(",");
}
sb.Append(Environment.NewLine);
// storing Each row and column value to excel sheet
for (int i = 0; i < gridview.Rows.Count - 1; i++)
{
for (int j = 0; j < gridview.Columns.Count; j++)
{
sb.Append (gridview.Rows[i].Cells[j].Text.ToString());
stringBuilder.Append(",");
}
sb.Append(Environment.NewLine);
}
WriteToCSV(sb.ToString();
}
public static void WriteToCSV(string text, string fileName)
{
string attachment = "attachment; filename="+fileName+DateTime.Now.ToString("yy-MM-dd")+".csv";
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.AddHeader("content-disposition", attachment);
HttpContext.Current.Response.ContentType = "text/csv;charset=utf8";
HttpContext.Current.Response.AddHeader("Pragma", "public");
HttpContext.Current.Response.Write('\uFEFF'); //this is BOM
HttpContext.Current.Response.Write(text);
HttpContext.Current.Response.End();
}
The reason it is failing is you don't have Excel installed. There are other options here (such as converting to CSV file), but if you want to use your code as is, the simplest way is to probably just install Excel on the server !
I need to download the excel to the specific folder
Example : D:\email
Now i was able to download the excel file in downloads ....but i need to download in D:\email
this is my code to create excel file :
protected void UploadDataTableToExcel(DataTable dtRecords)
{
string XlsPath = Server.MapPath(#"~/Add_data/test.xls");
string attachment = string.Empty;
if (XlsPath.IndexOf("\\") != -1)
{
string[] strFileName = XlsPath.Split(new char[] { '\\' });
attachment = "attachment; filename=" + strFileName[strFileName.Length - 1];
}
else
attachment = "attachment; filename=" + XlsPath;
try
{
Response.ClearContent();
Response.AddHeader("content-disposition", attachment);
Response.ContentType = "application/vnd.ms-excel";
string tab = string.Empty;
foreach (DataColumn datacol in dtRecords.Columns)
{
Response.Write(tab + datacol.ColumnName);
tab = "\t";
}
Response.Write("\n");
foreach (DataRow dr in dtRecords.Rows)
{
tab = "";
for (int j = 0; j < dtRecords.Columns.Count; j++)
{
Response.Write(tab + Convert.ToString(dr[j]));
tab = "\t";
}
Response.Write("\n");
}
Response.End();
}
catch (Exception ex)
{
//Response.Write(ex.Message);
}
}
you can manually move the file after download using
string sourceFile = #"C:\Users\test\Documents\Downloads\test.xls";
string destinationFile = #"D:\emails\test.xls";
// To move a file or folder to a new location:
System.IO.File.Move(sourceFile, destinationFile);
This question already has answers here:
Setting mime type for excel document
(6 answers)
Closed 9 years ago.
i've written this code which will generate an excel spreadsheet and save it to a specified location. I want to then display a "Save as" dialogue box by reading the file from the stored location and then asking then user where they want to store it.
Excel.Application excelApp = null;
Excel.Workbook wb = null;
Excel.Worksheet ws = null;
Excel.Range range = null;
excelApp = new Excel.Application();
wb = excelApp.Workbooks.Add();
ws = wb.Worksheets.get_Item(1) as Excel.Worksheet;
for(int i = 0; i< 10;++i) {
ws.Cells[i, 1] = i+
}
wb.SaveAs(#"C:\test.xls", Excel.XlFileFormat.xlWorkbookNormal);
wb.Close(true);
excelApp.Quit();
How to download in the following format?
string str = "Hello, world";
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(str);
return File(bytes, "text/plain");
Given that is an Excel doc saved at c:\temp\excelDoc.xls and given that you have a WebForm that has a link like this
<asp:LinkButton runat="server" ID="GetExcel" OnClick="GetExcel_Click">Download</asp:LinkButton>
In your code-behind you can read the file from disk and send to the user by something like this
protected void GetExcel_Click(object sender, EventArgs e)
{
var fileName = "excelDoc.xls";
using (var cs = new FileStream(#"c:\temp\" + fileName, FileMode.Open))
{
Response.Clear();
Response.AddHeader("content-disposition", "attachment; filename=" + fileName);
Response.ContentType = "application/vnd.ms-excel";
byte[] buffer = new byte[32768];
int read;
while ((read = cs.Read(buffer, 0, buffer.Length)) > 0)
{
Response.OutputStream.Write(buffer, 0, read);
}
Response.End();
Response.Flush();
}
}
I am using this code to download a excel file which exist in my solution. I have added a folder FileUpload and added a excel file UploadCWF.xlsx. My code is workin in local host. But not working when I host this to server.I am getting error - Could not find a part of the path. My code -
string filePath = HttpContext.Current.Server.MapPath("~/FileUpload/");
string _DownloadableProductFileName = "UploadCWF.xlsx";
System.IO.FileInfo FileName = new System.IO.FileInfo(filePath + "\\" + _DownloadableProductFileName);
FileStream myFile = new FileStream(filePath + "\\" + _DownloadableProductFileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
//Reads file as binary values
BinaryReader _BinaryReader = new BinaryReader(myFile);
//Check whether file exists in specified location
if (FileName.Exists)
{
try
{
long startBytes = 0;
string lastUpdateTiemStamp = File.GetLastWriteTimeUtc(filePath).ToString("r");
string _EncodedData = HttpUtility.UrlEncode(_DownloadableProductFileName, Encoding.UTF8) + lastUpdateTiemStamp;
Response.Clear();
Response.Buffer = false;
Response.AddHeader("Accept-Ranges", "bytes");
Response.AppendHeader("ETag", "\"" + _EncodedData + "\"");
Response.AppendHeader("Last-Modified", lastUpdateTiemStamp);
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment;filename=" + FileName.Name);
Response.AddHeader("Content-Length", (FileName.Length - startBytes).ToString());
Response.AddHeader("Connection", "Keep-Alive");
Response.ContentEncoding = Encoding.UTF8;
//Send data
_BinaryReader.BaseStream.Seek(startBytes, SeekOrigin.Begin);
//Dividing the data in 1024 bytes package
int maxCount = (int)Math.Ceiling((FileName.Length - startBytes + 0.0) / 1024);
//Download in block of 1024 bytes
int i;
for (i = 0; i < maxCount && Response.IsClientConnected; i++)
{
Response.BinaryWrite(_BinaryReader.ReadBytes(1024));
Response.Flush();
}
}
catch (Exception es)
{
throw es;
}
finally
{
Response.End();
_BinaryReader.Close();
myFile.Close();
}
}
else
System.Web.UI.ScriptManager.RegisterStartupScript(this, GetType(),
"FileNotFoundWarning", "alert('File is not available now!')", true);
Please some one help me.
You should first concat filepath and filename then get path using server.mappath.
You should write code like this
string filePath = HttpContext.Current.Server.MapPath("~/FileUpload/UploadCWF.xlsx");
System.IO.FileInfo FileName = new System.IO.FileInfo(filePath);