C# - Excel Download Library?
Jun 21, 2010Do we have any free 3rd party library that we can use in asp.net for download Excel sheets?
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Jan 17, 2011I am trying to automate the creation of an excel workbook from data retrieved from a SQL server. I have successfully automated the process and the file successfully saves in a pre-determined location as a 57kb xlsx file. However, when I run the Response.TransferFile code, a file is downloaded that is 18kb in size, and when you try to open the file, it says that the file has an invalid extension. Here is the relevent code:
[Code]....
I have tried multiple content types and different ways of specifying the content type (Response.ContentType = XXX, Response.ContentType = "application/excel","vnd.ms-excel",etc). Nothing works. I can't figure out why the filesize is different even if the extension is wrong.
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Mar 10, 2011I have a download which is in a class below
[Code]....
and on my page i have a download button which runs a webhandler like below
[Code]....
when the download button is clicked it runs the code below
[Code]....
the dtresults is a datatable that is created on the page. the problem i have is if the cell has commas in like '12 london road, london, le126yr' in the database then its putting it onto the next line in the exported csv file and treating it as a carriage return rather than keeping all on the same line. I have done a replace in the code to replace the comma's to replace them with nothing but it doesnt seem to be working.
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[Code]....
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I do not want all fields to be dropped into the sheet (so I will need control over that in my code)
This sounds like what I'm after (since I'll always only have one sheet)
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Unable to to open this internet site. The requested site is either unavailable or cannot be found. Please try again later"Below is the code. Any suggestions please?PS:byteArray contains the Excel data I am sending to the client.
[Code]....
Upload Gridview To Excel - Allow User To Select Where To Download The File
May 21, 2010I have a gridview that allows the user to export this gridview to excel. Here is my codes but I would like my user to be able to select where to download the file
Protected Sub ExportToExcel(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExport.Click
lblMsg.Visible = True
Try
Dim objSw As New StreamWriter(txtFileName.Text.Trim + ".xls")
'Dim serverFilePath As String = "D:Excel Files"
'Dim fileStream As New FileStream(serverFilePath, FileMode.Open)
'Dim fileSize As Long = fileStream.Length
'Response.ContentType = "application/octet-stream"
'Response.AddHeader("Content-Disposition", "attachment; filename=""" & txtFileName.Text.Trim & """;")
'Dim fileBuffer As Byte() = New Byte(fileSize - 1) {}
'fileStream.Read(fileBuffer, 0, CInt(fileSize))
'Response.BinaryWrite(fileBuffer)
'fileStream.Close()
'Response.[End]()
Dim objDt As DataTable = DirectCast(Session("Data"), DataTable).Copy()
'Get No Of Column in GridView
Dim NoOfColumn As Integer = objDt.Columns.Count...........................
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Jun 24, 2010I've a gridview which I am rendering to a html text writer and allowing clients to download as an excel spreadsheet using Response.Write. I'm using AJAX in my website now and suddenly it stopped working. This is the code I'm using
public static void Convert(DataSet ds, HttpResponse response)
{
try
{
//1. declare filename to export
string filename = "export";
//2. clear response object
response.Clear();
response.Charset = "";
//3. set response mime type to excel
response.ContentType = "application/vnd.ms-excel";
//4. prompt user to download the file
response.AppendHeader("content-disposition", "attachment; filename=" + filename + ".xls");
//5. create a string writer
StringWriter stringWrite = new StringWriter();
//6. create html writer which uses the string writer
HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
//7. instantiate a gridview
GridView gv = new GridView();
//8. set gridview datasource to the dataset
gv.DataSource = ds.Tables[0];
//9. bind gridview
gv.DataBind();
//10. tell the gridview to render itself into htmltextwriter
gv.RenderControl(htmlWrite);
//11. output html
response.Write(stringWrite.ToString());
//12. end response
response.End();
}
catch (Exception ex)
{
string str = ex.Message;
}
}
I've found that Response.Write doesn't work with AJAX. Are there any alternatives to this?
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View 3 RepliesHow To Export A Dataset To Excel And Raise A File Download Dialog From Webmethod
Aug 6, 2010I am using the following code to export a datset to excel sheet.
[Code]....
Problem is that its not raising file download and hence no export is taking place.The same code works fine in a normal method.But with the webmethod its not working.
Getting Appending Html In Csv File (open In Excel) After Download From Server To Local Machine
Dec 9, 2010I have created a CSV file on the server and want to send it to the user using the following code:
Dim strPhysicalPath As String
strPhysicalPath = Server.MapPath( "CSV/" & PathVirtual)
Dim objFileInfo As System.IO.FileInfo = New System.IO.FileInfo(strPhysicalPath)
Response.Clear()
Response.ContentType = "application/vnd.ms-excel"
Response.AddHeader("Content-Disposition", "attachment; filename=" & objFileInfo.Name)
Response.AddHeader("Content-Length", objFileInfo.Length.ToString())
Response.WriteFile(strPhysicalPath)
Response.Flush()
Response.End()
This seems to work fine except when the downloaded file is viewed in Excell the html code behind the page from which it came is also appended to the file. Does anyone have any idea why it does this?
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What I am trying to do is make some simple service or cmd line application that will help me automate retweeting.
So I am looking for a library that will allow me to get posts from other twitter accounts and then retweet them from another account.
I am not sure if the library can do this or not. Otherwise I was thinking of getting the RSS feed from the twiter account I want to get the twitters from parse out the new ones and use a library to retweet them on my own account.
I have not used twitter much so I am hopping someone can shed some light on this.
