.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Creating Excel file from C#

Posted By: Venkat     Posted Date: January 29, 2010    Points: 2   Category :C#
I used below coding for create a excel sheet.I got from on web site.
In below coding there is no problem.Its create the excel file.If i run second time,its ask to overwrite the current excel file.If I said "Yes" then it ok ,but If I select cancel button,its generate the Error message.The exception is

View Complete Post

More Related Resource Links

Stream Writer encoding when creating excel file

I am working on an application in which i save save html files which have ISO-8859-1 encoding (The html files are in spanish).
I use stream writer to save the source of the files as excel files.
The problem is the encoding options available in the system.text.Encoding class are
so when I save the page it changes certain characters.
<big>Can Any 1 suggest which encoding i should use ... </big>

Creating a dynamic excel file


Is it possible that i can create a dynamic excel file (destination)


ex, i want to create a Dyanamic Excel destination file with a filename base on the date

this will run on jobs. Is this possible?

11172006.xls, 11182006.xls

When dynamically creating an excel file, can SSIS create xlsx files successfully? I can only get SSI


Problem: An Excel file (XLSX) dynamically created by a SQL Task cannot be opened via Excel. The task succeeds, but when you try to open the workbook in Excel you get the fillowing error message: Excel cannot open the file 'myfile.xlsx" because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.

1. If the Excel file (xlsx) is created manually in Excel, then the SQL Task has no problem creating table (new worksheets) in the xlsx (so the "CREATE TABLE" statement works fine)
2. If I adjust the connection and task to work with Excel 97-2003 (xls) format then the approach works perfectly
3. The execution results show success of the SQL Task, but there are two warning messages. These same warnings appear when the SQL Task creates a new table (worksheet) successfully in a workbook (xlsx) which was created manually in Excel (and is not corrupt). Messages as follows:
Warning: Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.
Warning: Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.

SSIS Details:
1. ConnectionString: "Data Sour

Creating an Excel Spreadsheet programmatically using VB.NET

The Interoperability services make it very easy to work with COM Capable Applications such as Word and Excel. This article reveals using Excel from a managed application. Excel is the spreadsheet component of Microsoft Office 2000. The majority of Excel programmatic functionality is exposed through Automation via the type library Excel9.olb. The intention of this article is to express that a managed application can interrelate with Excel as a COM server.

Creating an Excel Spreadsheet and Adding Data to It Programmatically

The Interoperability services make it veryeasy to work with COM Capable Applications such as Word and Excel. Thisarticle reveals using Excel from a managed application. Excel is thespreadsheet component of Microsoft Office 2000. The majority of Excelprogrammatic functionality is exposed through Automation via the typelibrary Excel9.olb. The intention of this article is to express that amanaged application can interrelate with Excel as a COM server.

Convert excel file into xml


Hai, I have two columns with id,name in the excel sheet.I want to convert into xml file in the below format

<?xml version="1.0" encoding="utf-8"?>

<guide xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Boat id="1"> <name> Copper Kettle </name> </Boat> <Boat id="2"> <name> Copper Penny </name> </Boat> <Boat id="3"> <name> Copperhead </name> </Boat> <Boat id="4"> <name> Coppertone </name> </Boat> <Boat id="5"> <name> Copy Boy </name> </Boat> </guide>

suggest me with sample code in ASP.NET. Thanks


Read Excel file from Web Application (C#)



I have a web app where user uploads a file.

File is saved in server locally and I want to read some data from it.

Currently my development  server has office 2003.

So do I need office 2007 in order to be able to  read an excel from office 2007 ?

What are other requirements  ?

I tried a test, using

Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook wrkBook; // = new Microsoft.Office.Interop.Excel.Workbook();

wrkBook = excelApp.Workbooks.Open(@"C:\www\excel_files\b.xls", ....);

But When trying to open the file I get the error:

Exception from HRESULT: 0x800A03EC

So I'm wondering what I'm missing.


While Importing Excel 2007 file to Datatable - headerrow problem


Hi there,


I am trying to simply extract an excel data from an uploaded file an put it into a datatable. In this case the excel file has 3 rows but when I fill the datatable I only see row count of 2.

I tried changing HDR:NO; to HDR:YES and vice versa, but no luck. 

What am I doing wrong? (Note: the excel file cannot have a  headerrow)


string connstr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + pFilePath + ";Extended Properties=\"Excel 12.0;IMEX=1;HDR:NO;\"";
            OleDbConnection conn = new OleDbConnection(connstr);
            DataTable dtTables = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);
            string strTablename = dtTables.Rows[0]["TABLE_NAME"].ToString();
            string strSQL = "SELECT * FROM [" + strTablename + "]";

            OleDbCommand cmd = new OleDbCommand(strSQL, conn);

            DataTable dt = new DataTable();
            OleDbDataAdapter da = new OleDbDataAdapter(cmd);
            //At this point row count=2 which doesn't make sense




Returning datas from two excel file



I used the below code to return the datas from one excel file. My question is if i suppose need to get the records from morethan one excel file using joins, how it is possible.

   string connString = ConfigurationManager.ConnectionStrings["xls"].ConnectionString;
        // Create the connection object 
        OleDbConnection oledbConn = new OleDbConnection(connString);
         // Open connection
            // Create OleDbCommand object and select data from worksheet Sheet1
            OleDbCommand cmd = new OleDbCommand("SELECT * FROM [Sheet1$]", oledbConn);
            // Create new OleDbDataAdapter 
            OleDbDataAdapter oleda = new OleDbDataAdapter();
            oleda.SelectCommand = cmd;
            // Create a DataSet which will hold the data extracted from the worksheet.
            DataSet ds = new DataSet();
            // Fill the DataSet from the data extracted from the worksheet.
            oleda.Fill(ds, "Employees");




Resource File: Creating Privacy-aware Web Sites


Privacy issues are of primary concern to those involved in Internet commerce. Some consumers are hesitant to provide information to Web sites without clearly understanding how their data will be used and with whom it will be shared.

MSDN Magazine August 2003

ISAPI Extensions: Creating a DLL to Enable HTTP-based File Uploads with IIS


The MIME-compliant content type, called multipart/form-data, makes writing HTML that uploads files almost trivial. On the server side though, ASP does not have a way to access data in the multipart/form-data format. The most flexible way to access the uploaded file is through a C++ ISAPI Extension DLL. This article describes a reusable ISAPI extension DLL that allows you to upload images and files without writing C++ code. It is coupled with a few COM components that make it readily reusable for ASP development. With .NET, this whole process is much easier, and this article shows preliminary code that uploads files using ASP.NET features.

Panos Kougiouris

MSDN Magazine October 2001

Excel file getting error


when i am trying to save a excel document in library it getting error like "The file cannot be saved because some properties are missing or invalid"

If anyone know the solution for this pls tell me.



Excel file not showing in search results

We have a strange issue. I have one Excel document (or at least one that I am aware of) that will not show up in search results for content within the document. I can find the document by title just fine, but when I search for words within the document I do not see it. The document was originally a 2003 Excel document and was recently converted to 2007. Other than that there isn't really anything unusual about it (some formatting stuff, but mainly just background colors and whatnot, nothing fancy). The crawl log shows the document was crawled without error. Anyone know anything else I can check on?

Problems creating a BDC file that use a unique select statment


I'm trying to build an BDC file that will pull information back from two tables in an Oracle database, I can import it without any errors, but then it tells me I do not have a filter when I try and select an item.  When I add a filter I get an error when I import the file.  The error I get is the following.
"Application definition import failed. The following error occurred: The IdentifierName Attribute of the TypeDescriptor named 'TestDate' of the Parameter named ':TestDate' of the Method named 'Get_TestTwelve_List' of the Entity named 'TestTwelve' does not match any of the defined Identifiers for the Entity. Error was encountered at or just before Line: '133' and Position: '16'."

Here is the section of

      <Property Name="RdbCommandText" Type="System.String"><![CDATA[

Excel file published on Sharepoint


I want to use ExcelServices of MOSS to publish few XLS files.
The problem is if i want to open up the excel file it will not open in the web browser as I expected, altough i already click "Display as web page".
My MOSS instance is on a server without MS Excel installed on it.
The excel file was created using Excel 2003.
Any idea how to fix it?
Thank you very much,

Create excel file from Binary data on SqlServer



My requirement is that i upload an excel file then i need to validate that data.


1. Uploading file using using upload control saving binary in SqlServer

2. Then i am creating file from binary data  on Sql Server using below command and then using OPENROWSET to dump data to Sql table

3. Then reading Sql Table row wise and validating data.


Alter Procedure spUploadExcelFile
  @PKID int,
  @BatchID int


	Declare @VarBin varbinary(max)
	Declare @FileName varchar(100)
	DECLARE @sql nvarchar(MAX)
                DECLARE @errMsg nvarchar(MAX)
	DECLARE @ObjectReturn INT
	DECLARE @ErrorSource VARCHAR(255)
	DECLARE @ErrorDesc VARCHAR(255)
	DECLARE @ObjectToken INT

	Select @VarBin  = Content , @FileName = [FileName] from MultilangBinaryData Where PKID = @PKID
	SET @FileName = 'C:\'  + @FileName
	EXEC sp_OACreate 'ADODB.Stream' @ObjectToken OUTPUT
	EXEC sp_OASetProperty @ObjectToken, 'Type', 1
	EXEC sp_OAMethod @ObjectToken, 'Open'
	EXEC sp_OAMethod @ObjectToken, 'Write', NULL, @VarBin
	EXEC sp_OAMethod @ObjectToken, 'SaveToFile', NULL, @FileName, 2
	EXEC sp_OAMethod @ObjectToken, 'Close'
	EXEC sp_OADestroy @ObjectToken  
	SET @sql = 'INSERT INTO dbo.UserBulkData SELECT 0,NULL,'+ @BatchI

reading excel file problem



i have 200 rows in my excel file. im using OleDbConnection to read the excel file.

The problem is that it will read all the blank rows from row 200 onwards. Is there a configuration im missing ? or is there a way to import all rows that has data? Here's some of my code.

string excelConnectionString =
               "Provider=Microsoft.Jet.OLEDB.4.0;" +
                "Data Source=" + filePath + ";" +
                "Extended Properties=Excel 8.0";

OleDbConnection excelConnection =
                    new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=NO'");

OleDbCommand cmd = new OleDbCommand("Select * from [list$]",excelConnection);

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend