VS 2008 - Most Optimal Or Efficient Way To Export A Dataset To An Excel File
Oct 29, 2011
I am looking for some guidance with the most optimal or efficient way to export a dataset to an excel file. I have searched the forums and found a number of methods to do this. However, the code I am currently using is very inefficient as it is itterating through the rows and columns to create the excel file. The app I am working on needs to be able to create 50 or so excel files each with 500+ rows and 40-50 columns. This method seems to inefficient for my use.
I have seen some code out there to use an ODBC call to excel to create the file. I am wondering if someone can verify that this is the most efficient way to meet my goal. It should also be noted that after the export I will want to do some basic formatting of the sheet. Adding bold column headers, autofilters, and autofit all columns.
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Oct 22, 2009
I am looking for some guidance with the most optimal or efficient way to export a dataset to an excel file. I have searched the forums and found a number of methods to do this. However, the code I am currently using is very inefficient as it is itterating through the rows and columns to create the excel file. The app I am working on needs to be able to create 50 or so excel files each with 500+ rows and 40-50 columns. This method seems to inefficient for my use
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Jan 21, 2011
how to Export DataSet to Multiple Excel Sheets and download those file into a zip in C# asp.net?
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Jan 22, 2010
I'm using ODBC to export tables from a dataset to an Excel file without auto-formatting Excel or even needing to have Excel installed on the users PC. This works great but I just had a request to autosize the columns and make the header line bold. The only way I know of doing this is to fully automate Excel to control the row/column/cell formatting. Does anyone know a way of doing this without auto-formatting Excel?
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Dec 19, 2011
I have to provide an Excel file as an output. I have to color some of lines and make them bold.The input is based on a dynamic list (in memory) and it also could be based on CSV file that I'm already provide today (based on the same dynamic list).I'm wondering what would be the most efficient way (in terms of performance) in order to provide the colored Excel output?Should I export directly from dynamic list into Excel - or - Should I export from CSV into Excel ?
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Mar 27, 2009
I have the following bit of code that I have used in the past to export a DataSet generated from the Stored Procedure 'HISTORICAL_COSTS' to Excel.[code]...
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Oct 29, 2009
how to access the dataset if it is in another page so that i could export it to the excel sheet....and
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Sep 9, 2011
Export data from Dataset with multiple table to excel sheet
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Nov 30, 2007
I am looking for an example to export the data from a dataset to an existing excel speadsheet in vb.net 2005?
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Nov 4, 2010
VB2005. I have several DataSets that I create or grab from an external source. One example is
Dim sql As String = "SELECT TOP 30 * FROM myTable" & vbCrLf & _
"WHERE Area='YY' AND CarNum='734EP' " & _
"ORDER BY ProcDate ASC;"
Dim da As New OleDbDataAdapter(sql, myOLEDBconn)
'create a dataset and fill it with the returned data.
Dim ds As New DataSet
da.Fill(ds, "MyData")
Once I have these DataSets I then have to pump them into a specific worksheet in an existing Excel2007 workbook. The connection and interaction with Excel and the workbook/worksheet is already established and that works. But I am stuck in exporting the DataSets
into the specific worksheet.
Note that I have already scoured the web and MS Community site and all code that I have found so far iterates through each and every row and column of the DataSet and then adds that to the worksheet in a cell by cell manner. This is fine and in testing that works. But there has got to be a better way to do this. For even a moderate sized DataSet the exporting just takes a long time. 25 records with 15 columns takes about 10 to 15 seconds.
I've also been experimenting with some scratch code I found that converts the DataSet to an ADODB Recordset and then uses the xlwksht.Cells.CopyFromRecordset function to export it in one fell swoop. I haven't got this one to work just right but it seems in the end it also does an iteration through each and every record and field to convert to the ADODB recordset.
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Aug 31, 2009
I want to export dataset content using VB in one shot as i'm exporting crystal report
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Feb 25, 2008
I am using VB2008 and have an integer value.How do I export it to an exisitng Excel file, I want to put it in a specific cell.Also, I may have the need to do this for an array in which I would like to put in in consecutive cell in Excel.
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Dec 27, 2010
I have created an vb.net application in which ,I want to export sql table data to excel.
On form I have used one button namely "Export to Excel".
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Jun 12, 2012
I'm creating a small application that will export the record from database to excel format (.xls) and import the record from excel as well. i have this code below i dont if this the right approach but im getting the error. Im using emulator btw. error :"The process can not access the file 'My Documents est1.xls' because it is being used by another process." Code: I'm still figuring out about import function any ideas?
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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]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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May 8, 2012
I have this issue that occurs with me and driving me crazy i have a report that contains thousands of records and i need to export it to excel , but the excel normal extension .xls
is showing missing records at the end of the file , so i save my file as an .xlsx extension it saves correctly but when i open the file it generates an error
"Excel cannot open the file '<var>filename</var>.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file."but when i test the file i drag it and open it in an empty notepad all the records shows up correctly
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Aug 25, 2010
I want to create a web application,specifically an e-shop and I want to be able to export a xml file from a dataset with products.
Is this feasible with visual studio and vb.NET? If so
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Apr 3, 2007
How would you export a dataset to a csv file?
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Nov 24, 2009
I have a form which contains a datagridview which lists items.I have a button that will export all of my dataset to a text file:-
Dim str As New System.Text.StringBuilder()
For Each dr As DataRow In Me.ContactsDataSet.Contacts
For Each field As Object In dr.ItemArray
str.Append(field.ToString & ",")
[code]....
How can I export only the rows that I select (if I setup a checkbox column in my datagridview, I want be be able to only export the items that are checked)
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Oct 7, 2011
I need to export Chart(image) and grid (tabular) row data into excel file. I can not use automation because Office tools are not installed in my server. I've found a bunch of free/proprietary tools like:
NPOI
MyXLS
ExcelWriter (softartisans)
JetCell (DevTrio)
Aspose.Cells (Aspose)
But I do not know which one is better for my needs. I need to export not only grid row data but also Chart (image), thats why I am thinking about.
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Nov 9, 2011
I am looping through my dataset to save my database, I thought this might not be the best way. Is there a more resource efficient of doing it?
For i As Integer = 0 To CO.Tables("CO_Del").Rows.Count - 1 'CO is my DataSet
dbCommand.Parameters.Clear()
AddInParameter(dbCommand, "@IsDelete", DbType.Boolean, 0, DBNull.Value)[code].......
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Apr 20, 2009
I work for a somewhat large company.There are about 160 Windows XP Pro users. We are still using Microsoft Office 2000 for the most part.We have upgraded some users to Office 2003. We are not using Microsoft Exchange.I have to export every users' Outlook 2000 or Outlook 2003 Contacts into an Excel or CSV file every 6 months as a way of backing the Outlook Address Contacts.Currently I am doing this by physically going to every pc and manually exporting the contacts.This is a large pain.I am trying to find out if I can use or create a Visual Basic 2008 Express program or script that will export the contacts from Outlook and save it as an Excel or CSV file.The name of the file should be the same as the computers net name.It should be saved in the same location, on the network, each time.I am new to programming and new to VB 2008 Express.I do not know or have any code to start with.
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Dec 9, 2010
i built a patient management software for a clinic and i need to export patiet list from ASP.net grid view to excel file my question is:Is there a way to export gridview to excel i am using vb.net and visual web developer 2010 i store datasource from advanced search page into a session and redirect to result page
here is the code of result page
[Code]...
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Jul 8, 2010
I like to compress the xmldata before the data is provided to the client as an excel file. I am trying to compress and deliver it as a .zip file. its not working Here's my code below. I tried compressing it, converting it to bytes etc etc. The issue with below code is, the XSL transformation is not happening properly and the output excel file is raw xml with some .net exception at the end. (that's what I see on the .xls file that's downloaded at the end) Before I started working on compression my below code was working fine that gives properly formatted excel file from the xml input. the excel file is so nice you can't even tell it was from XML.
[Code]...
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Nov 11, 2011
i have this code it keeps giving me error
Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim response As HttpResponse = HttpContext.Current.Response()
response.Clear()
response.AddHeader("content-disposition", "attachment;filename=XXXXXX.xls")
[Code]....
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Jun 10, 2007
I have done a google and see that many people have asked the question on how to export a Datagridview to a Excel (.xls) file. For some reason I cannot seem to get it to work (i have gotton the program to open an Excel and save it, all hidden in the background). I use a bit of the coding from this source code [URL] but modified it and incorporated it into my program. It connects an OLE Database connection with the excel sheet... but what i want to do is beable to alter the sheet in the datagridview and export it back to an excel sheet. I am not trying to sound pushy when i say this but... if you download the source file i am using you will get a really good idea of my situation..
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Nov 30, 2011
I'm using vb2008 I ried this code to print data from my project to Excel file if the File is open . but didn't success
[Code]....
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Jan 11, 2007
I am working on a windows application using vb.net 2003. I am required to export my datagrid onto a excel file. I just need a button.
This is my code to populate the datagrid.
Code:
Dim connectionString As String
connectionString = "DRIVER={MySQL ODBC 3.51 Driver};" + "SERVER=localhost;" + "DATABASE=luckyspin;" + "UID=root;" + "PASSWORD=123;" + "OPTION=3"
[Code]....
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Aug 6, 2011
I need some easy/basic way to export DataGrid to Excel file and also to be able later to Import this file back to DataGrid. Nothing complicated its simple table with values amount of columns won't change.
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Apr 11, 2011
is there a way to export the whole data in one table from sql server 2008 directly using asp.net and vb.net without using datagridview to EXCEL FILE?
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