C# - How To Communicate An Excel Workbook

Apr 22, 2010

Is there a way to load an Excel document in a web page and communicate with the excel control using code behind? (JavaScript or Asp.NET) ?

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Convert Excel Workbook Into Byte Array?

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I have datatable with records and i have existng Excel file in my application temp folder i want to export datatable records in this excel file workbook and i want to convert this excel workbook into byte array and i want to send this byte array in reponse.write to user to give download excel file option

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Databases :: Reading Data From An Excel Workbook (.xls)

Mar 1, 2011

I have a scenario where I have to read an excel file to dump records in a mysql database. The code generates an exception Sheet1 not found. I have pasted the code below. Please let me know the solution to the exception. I have given the correct read/write/modify settings to my excel file.

if (fileUpload1.PostedFile.FileName.EndsWith(".xls") || fileUpload1.PostedFile.FileName.EndsWith(".XLS"))
string fileName = Server.MapPath(fileUpload1.PostedFile.FileName);
string connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties=Excel 8.0";
// 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, "RestaurantExcelData");
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
Response.Write("Data: " + ds.Tables[0].Rows[i].ItemArray[0].ToString() + "");
catch(Exception e1)
// Close connection
Response.Write("File Not Excel (xls||XLS)");

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Databases :: Type Excel.worksheet And Workbook Not Defined

May 8, 2010

am new to vb.net programming. i am trying to read an existing excel 2007 file from vb.net i used a form with single button and i written code in button click event

Imports Excel = Microsoft.Office.Interop.Excel
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim xlApp As Excel.Application
Dim xlWorkBook As Excel.Workbook
Dim xlWorkSheet As Excel.Worksheet
xlApp = New Excel.ApplicationClass
xlWorkBook = xlApp.Workbooks.Open("C:Documents and SettingsUSERDesktopd0805

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ADO.NET :: Accessing Data From Excel Workbook And Displaying It In Windows Form?

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I am building an windows application using visual studio 2005. I want to retreive data from excel workbook and i want to display the retreived data in a drop down menu.

I have few question regarding this process.

1. How do we connect to excel using ADODB.Connection.

let me know following code snippet works or not.

Dim cn as ADODB.Connection
Set cn = New ADODB.Connection
With cn
.Provider = "Microsoft.Jet.OLEDB.4.0"
.ConnectionString = "Data Source=C:MyFolderMyWorkbook.xls;" & _
"Extended Properties=Excel 8.0;"
End With

2:How do we access and manupilate individual column from excel worksheet?

Since i am new to .Net environment i need detailed explanation about whole process.

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i use this code to export data into word.

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