Using c# I can successfully open an excel document and read the data in the first worksheet with the code below. However, my .xlsx has multiple worksheets so I would like to loop through the worksheet collection rather than hard coding the name of each worksheet. Many thanks.
string path = @"C:\Extract\Extract.xlsx";
string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
string sql = "SELECT * FROM [Sheet1$]";
using (OleDbDataAdapter adaptor = new OleDbDataAdapter(sql, connStr))
{
DataSet ds = new DataSet();
adaptor.Fill(ds);
DataTable dt = ds.Tables[0];
}
I’m about to work on almost the same problem.
I found the guide at http://www.dotnetperls.com/excel quite useful.
In short, to open worksheet no. 3, add the following code after opening the excel workbook:
var worksheet = workbook.Worksheets[3] as
Microsoft.Office.Interop.Excel.Worksheet;
Hope this answered your question.
Answer：
I used most of the code in the answer here [Reading multiple excel sheets with different worksheet names that was kindly pointed out to me in a comment on my question.
It wouldn’t compile for me in VS 2013 though as the DataRow object does not have have the property Item (- r.Item(0).ToString in that code). So I just changed that little bit. It also brought back some worksheet that had Print_Area in its name which wasn’t valid so I took that out of my loop. Here is the code as it worked for me.
string path = @"C:\Extract\Extract.xlsx";
string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
DataTable sheets = GetSchemaTable(connStr);
string sql = string.Empty;
DataSet ds = new DataSet();
foreach (DataRow dr in sheets.Rows)
{ //Print_Area
string WorkSheetName = dr["TABLE_NAME"].ToString().Trim();
if (!WorkSheetName.Contains("Print_Area"))
{
sql = "SELECT * FROM [" + WorkSheetName + "]";
ds.Clear();
OleDbDataAdapter data = new OleDbDataAdapter(sql, connStr);
data.Fill(ds);
DataTable dt1 = ds.Tables[0];
foreach (DataRow dr1 in dt1.Rows)
{
//parsing work
}
}
}
static DataTable GetSchemaTable(string connectionString)
{
using (OleDbConnection connection = new
OleDbConnection(connectionString))
{
connection.Open();
DataTable schemaTable = connection.GetOleDbSchemaTable(
OleDbSchemaGuid.Tables,
new object[] { null, null, null, "TABLE" });
return schemaTable;
}
}
Answer：
I’d recommend using EPPlus (available via Nuget https://www.nuget.org/packages/EPPlus/ ) it’s a great wrapper tool for working with .xlsx spreadsheets in .Net .In it worksheets are a collection and so you can do what you want by just looping round them, regardless of name or index.
For example,
using (ExcelPackage package = new ExcelPackage(new FileInfo(sourceFilePath)))
{
foreach (var excelWorksheet in package.Workbook.Worksheets)
...
}
Answer：
You should try the Open XML Format SDK (Nuget: Link). The link below explains both reading and writing Excel documents:
http://www.codeproject.com/Articles/670141/Read-and-Write-Microsoft-Excel-with-Open-XML-SDK
Oh by the way, office doesn’t have to be installed to use…
