Web Forms :: Convert Excel File (XLS And XLSX) To PDF File Using C#

Dec 4, 2012

I need to convert a excel file to pdf file in asp.net. How to achieve this in c#.

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Excel Cannot Open The File "Report.xlsx" Because The File Format Or Extension Is Not Valid?

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Excel cannot open the file "Report.xlsx" because the file format or extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file

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Forms Data Controls :: How To Determine Excel .XLSX Version From Uploaded File

Aug 10, 2010

In my application I've allowed users to upload Excel 2003 .xls files, and import them into a Gridview. This has been working fine using the following connection string:


Now my users are using Excel 2003, 2007 or 2010, I need to allow the newer file extensions (.XLSX) to be accessible too.

Therefore, within the connection string above I presume I could change the Excel version from 8.0 to 9.0 or 10.0 respectively, but is there much difference between Excel 2007 and Excel 2010 files?

If so, is it possible to 'detect' the Excel file version so that I can use the appropriate connection string to read the data from the files?

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Databases :: Upload Xlsx (MS Excel) File To Oracle DB?

Jan 18, 2011

I would like to upload a xlsx file to Oracle DB (Oracle 11g). I'm using VS .NET 2008 (C#, web).

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<section id="test">
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Controls :: Convert Excel To PDF File Using C#

May 30, 2013

I have exported the excel and save it in a folder.

Now i need to save the excel in the pdf format using c#.net

Is there any way to achieve this.

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Controls :: Convert PDF Document To Excel File Using C#

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How to convert pdf to excel.

Like on my webpage i upload pdf file and it gives me excel file to download.

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I want read data from file pdf alter input data in file Excel(csv)?I want using asp.net or using iTextSharp

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Web Forms :: Download .xlsx File From Server

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Iv created a web application using vb.net 2005. Its working fine and running fine on the server (Microsoft Server 2003). The problem i have is to dowload a file from the same server using vb.net. I tried using this code but it gives me a : "is not a virtual path" error.

Response.ContentType =
"attachment; filename=AllReports.xlsx")".xlsx")

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Web Forms :: Default Save As File Type - Xls / Xlsx?

Feb 10, 2011

While exporting the html to Excel using Response.Write() in ASP.NET and when I try to save as the exported file I'm getting the default save as file type 'Web Page *.html, *.htm in excel application. Is there an any fix to get the default save as file type as xls or xlsx?

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Web Forms :: Change Column Name In Xlsx File When Execute From Database?

May 7, 2015

according below thread


I export xslx file from database from estate_p table in Estate_p  table are below column

Id   Name   Behcode   Estate

I want when it export these column into excel it change column name like below

Id   CustomerName     Code   Estate 

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I have a file pdf, in file pdf of me has a table with many columns. How to Fill data from file pdf to columns of file Excel?I want fill data from file table of file pdf to file excel following format of file pdf.

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Web Forms :: Error - Could Not Find File 'C:CHURCHROOF - CRIME Live 150110.xlsx'

Jan 15, 2010

I get the following error message:

Could not find file 'C:CHURCHROOF - CRIME live 150110.xlsx'.

When running the following code:

if (FileUpLoad1.HasFile)
string serverpath = "\\server1\Temp\ ";
string filepath = FileUpLoad1.PostedFile.FileName;
string filename = FileUpLoad1.FileName;
string destination = serverpath + filename;
string[] existingFilesArray = System.IO.Directory.GetFiles(serverpath, "*.xlsx");
foreach (string existingFile in existingFilesArray)
File.Copy(filepath, destination);

The code looks for a file and uploads the file to another location.

it fails at the last section

It works for me on my machine. but not the users

File.Copy(filepath, destination);

NO matter were the users put the file it fails.

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Unable To Import Xlsx File

Jan 17, 2011

I am unable to import xlsx file in Asp .Net getting below error:-

Could not find installable ISAM.

I am using below code for importing xlsx file:-

Protected Function ExcelConnection() As OleDbCommand
' Connect to the Excel Spreadsheet
Dim xConnStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:Users cs0028DesktopUpload1.xlsx;" & _
"Extended Properties=Excel 12.0;"
' create your excel connection object using the connection string
Dim objXConn As New OleDbConnection(xConnStr)
Dim objCommand As New OleDbCommand("SELECT * FROM [Sheet1$]", objXConn)
Return objCommand

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C# - Download .xlsx File Using Response.TransmitFile()?

Feb 16, 2010

I'm working on some code that generates an Excel spreadsheet server-side and then downloads it to the user. I'm using ExcelPackage to generate the file.

The generation is working just fine. I can open the generated files using Excel 2007 with no issues. But, I'm having trouble downloading the file with Response.TransmitFile().

Right now, I have the following code:

//Generate the file using ExcelPackage
string fileName = generateExcelFile(dataList, "MyReportData");
Response.AddHeader("content-disposition", "attachment;filename=FileName.xls");
Response.ContentType = "application/vnd.xls"
Response.Charset = "";

When Excel 2007 opens the file downloaded as above, it gives the "file format doesn't match extension" warning. After clicking past the warning, Excel displays the raw xml contents of the file. If I change the file extension, like so Response.AddHeader("content-disposition", "attachment;filename=FileName.xlsx");
Excel 2007 gives an "Excel found unreadable content in the file" error, followed by a dialog that offers to locate a converter on the web. If I click "no" on this dialog, Excel is able to load the data.

I've also experimented with different MIME types, like application/vnd.ms-excel and application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, combined with file extensions of .xls and .xlsx. All combinations result in one of the two behaviors mentioned above. What is the correct combination of file extension and MIME type to use in this scenario? What else could cause this failure, other than an improper MIME type or extension? FYI, this is occurring with Visual Studio's built-in development web server. I haven't yet tried this with IIS.

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Databases :: User Validation In Xlsx File?

Aug 20, 2010

I am validating user from Login.xlsx file. It was working fine by validating email and password from that file. For testing i got new file same contents of file but added some more user names.So after that when i validating the user i am getting the following error "Data type mismatch in criteria expression".But when i replaced the new to old one it is working fine. The contens of both files are the same. So why this kind of error happened.

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Unable To Open .xlsx File On The IIS Server?

Jun 9, 2010

I have a link http://Test/Folder/file1.xls which is working fine But if I typehttp://Test/Folder/file1.xlsx it is not working. It is giving me a file not found error.So when I read online every one is suggesting me to add the correct MIME type at tyhe IIS level. I don't know if that's the correct thing to do.I opened IIS and navigated to folder FOLDER right clicked and selected properties -> HTTP Headers -> MIME Types->New -> Extension -> .Xlsx-> What should i be entering for MIME type?

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Databases :: Fetching The Data From Book1.xlsx File?

Sep 24, 2010

I am trying to fetching the data from Book1.xlsx file. The program is not working and throws an exception. check the code and tell me where I am doing the mistake?


The exception is:

An error: The Microsoft Office Access database engine cannot open or write to the file ''. It is already opened exclusively by another user, or you need permission to view and write its data.

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Web Forms :: How To Convert Pdf File Into Binary Data Using File Streams

Nov 28, 2010

My files are stored on a data repository in different formats like .doc,.docx,.pdf,.jpeg,.jpg,.tiff. I want to get those files in binary format(i.e byte[]) so that I can able to see that file to the user using a radbinary image control.I am able to get .jpeg and .jpg files and I can show those to users.But while I am trying to show .doc,.docx,.pdf files I am getting "Not valid parameter" exception.How can I solve this problem? My doubt is that pdf,doc,docx files are having no of pages. So while converting this total pages in to binary data I am getting error. So How can I show first page of .doc,.docx,.pdf files using radbinary image control.Here is my code.RadBinary Image controlis a telerik control,it only deals with binary data.


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Web Forms :: Convert PDF File To Image File In C#

Mar 20, 2012

how to convert pdf file to image file?

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Forms Data Controls :: Saving Repeater Data As .xlsx File?

Apr 1, 2010

Using the Interop for Excel 2003 I had a nice little link that saved or opened the repeater content as .xls. Now we are using Excel 2007 and I get file format error messages. When I click the OK button on the error pop-up Excel closes. Does anyone out there know how to convert my code to handle the .xlsx format? I've been reading up on Interop for 2007 but none of the examples seem to work for this particular simple task. Here is my code from the "Export to Excel" button click:

Protected Sub btnExport_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExport.Click
' Send HTTP headers that specify Excel filename, MIME type, and character set
Dim sTemp As String = "attachment;filename=CoverageCase" & Session("OpenCase").casekey.ToString & ".xlsx"
Response.AddHeader("content-disposition", sTemp)
Response.ContentType = "application/vnd.ms-excel"
Response.Charset = ""
' Create objects used to render the controls
Dim strw As New System.IO.StringWriter........

I found a thread from a couple of years ago dealing with this but there was no solution [URL]. There were a couple of tortureous work arounds but neither work for me.

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Web Forms :: Exporting To Excel 2007 (XLSX Format)

Mar 13, 2012

in my web application page i have a option to export to excel . I am able to export the data to Excel but have 2 issues

 1)  i hav ethe option of exporting in .XLS or .XLSX format

i am able to export in .xls format from any system ie the system having office 2007 or 2003

but when i am trying to export in .XLSX format i get error

Microsoft Office Excel---------------------------The file you are trying to open, 'noup.xlsx', is in a different format than specified by the file extension. Verify that the file is not corrupted and that the file extension matches the file format---------------------------Ok---------------------------

2) when exporting i want the excel sheet to be saved with the name thats selected from a dropdown

suppose the dropdown has text selected as CITY

i want the excel sheet as CITY.XLS/.XLSX

i my developemnet system it works fine with below code

string filename = dropdown1.SelectedItem.Text
if (Extension.SelectedValue.ToString() == ".xls")


but on production server i get the name of .aspx page

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How To Convert The Binary File To A File In A String Format And Display It In A Page

Feb 22, 2011

I wish to know how to convert the byte array file to a file in a string format and display it in a webpage. how can i perform this?

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Installation :: Convert Customer.aspx.cs Source File To Dl File?

Mar 31, 2010

I have developed one webApplication that i suppose to submit to my client but for security reason i want to convert all the .cs to dll file.example consider customer.aspx customer.aspx.cs here i donot want to provide customer.aspx.cs file to customer instead i want to give client as dll fileI i can do this, PLEASE HELP ME, IT IS VERY URGENT FOR ME, I WAS TRYED LAST 2 DAYS,

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Using Oledb To Export Excel File Returns Empty File

Feb 24, 2010

I am using asp.net oledb to export information to excel file. I encounter problems when the information to export becomes too big, in this case the code I have given below, the excel file generated becomes an empty spreadsheet. If I changed the loop to 1123 for insertion of the rows. The generated excel file is fine, 1125 rows, and 4 columns shown. A test program in windows form is also working fine regardless of how many rows.
Code has been simplified, "information ..." in the sql insertion command represents 1803 characters.

ExcelObjConn = "Provider=Microsoft.Ace.OLEDB.12.0;" & _
"Data Source=" & fileName & ";Extended Properties=Excel 12.0 XML"
ExcelConnection = New System.Data.OleDb.OleDbConnection(ExcelObjConn)
SqlCommand = "CREATE TABLE ABC ([row1] text, [row2] text, [row3] text, [row4] text)"
ExcelCommand = New OleDb.OleDbCommand(SqlCommand, ExcelConnection)
For i As Integer = 0 To 1124
SqlCommand = "Insert into ABC ([row1], [row2], [row3], [row4]) Values ('information...', 'information ...', 'information ...', 'information ...')"
ExcelCommand = New OleDb.OleDbCommand(SqlCommand, ExcelConnection)
Catch ex As Exception
If ExcelConnection IsNot Nothing Then
End If
End Try

I couldn't find a solution to my problem as well. What I did eventually was to run the process using another separate windows service. The code works perfectly fine running from a windows form or service program, but not asp.net, not sure why.

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