Develop Reference

No value given for one or more required parameters error - Excel

I am getting data from excel and showing it in DataGridWiew.
I have two textboxes, one is for starting index for first record and other is for last record.
Code works fine. But lets suppose starting record is 1 and ending is 10 when I change 10 to 1 or 2 it gives me an error in this line:
adapter.Fill(dataTable);
Full Code is below:
public DataSet Parse(string fileName)
{
string connectionString = string.Format("provider = Microsoft.Jet.OLEDB.4.0; data source = {0}; Extended Properties = Excel 8.0;", fileName);
DataSet data = new DataSet();
foreach (var sheetName in GetExcelSheetNames(connectionString))
{
using (OleDbConnection con = new OleDbConnection(connectionString))
{
string query = "";
var dataTable = new DataTable();
if(tbStarting.Text.Trim()=="" && tbEnding.Text.Trim() == "")
{
query = string.Format("SELECT * FROM [{0}]", sheetName);
}
else
{
query = string.Format("SELECT * FROM [{0}] where SrNo between " + int.Parse(tbStarting.Text.Trim()) + " and " + int.Parse(tbEnding.Text.Trim()) + " order by SrNo", sheetName);
}
con.Open();
OleDbDataAdapter adapter = new OleDbDataAdapter(query, con);
adapter.Fill(dataTable);
data.Tables.Add(dataTable);
con.Close();
}
}
return data;
}
static string[] GetExcelSheetNames(string connectionString)
{
OleDbConnection con = null;
DataTable dt = null;
con = new OleDbConnection(connectionString);
con.Open();
dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
return null;
}
String[] excelSheetNames = new String[dt.Rows.Count];
int i = 0;
foreach (DataRow row in dt.Rows)
{
excelSheetNames[i] = row["TABLE_NAME"].ToString();
i++;
}
return excelSheetNames;
}
Why this is happening please help me?

Looking at the code, it seems that your procedure is working when you ask to retrieve all the record in each table. But you are not showing which table (Sheet) is actually used afterwars.
Chances are, you are using the first one only.
When you submit some parameters, only one of the tables (Sheets) can fulfill those requirements. The other(s) don't, possibly because a field named [SrNo] is not present.
This causes the More Parameters Required error when trying to apply a filter.
Not related to the error, but worth noting: you don't need to recreate the whole DataSet + DataTables to filter your DataSources.
The DataSet.Tables[N].DefaultView.RowFilter can be used to get the same result without destroying all the objects each time a filter is required.
RowFilter has some limitations in the language (e.g. does not support BETWEEN, Field >= Value1 AND Field <= Value2 must be used), but it's quite effective.
This is a possible setup:
(xDataSet is a placeholder for your actual DataSet)
//Collect the values in the TextBoxes in a string array
private void button1_Click(object sender, EventArgs e)
{
string[] Ranges = new string[] { tbStarting.Text.Trim(), tbEnding.Text.Trim() };
if (xDataSet != null)
FilterDataset(Ranges);
}
private void FilterDataset(string[] Ranges)
{
if (string.IsNullOrEmpty(Ranges[0]) & string.IsNullOrEmpty(Ranges[1]))
xDataSet.Tables[0].DefaultView.RowFilter = null;
else if (string.IsNullOrEmpty(Ranges[0]) | string.IsNullOrEmpty(Ranges[1]))
return;
else if (int.Parse(Ranges[0]) < int.Parse(Ranges[1]))
xDataSet.Tables[0].DefaultView.RowFilter = string.Format("SrNo >= {0} AND SrNo <= {1}", Ranges[0], Ranges[1]);
else
xDataSet.Tables[0].DefaultView.RowFilter = string.Format("SrNo = {0}", Ranges[0]);
this.dataGridView1.Update();
}
I've modified your code you code a bit to handle those requirements.
(I've left here those filters anyway; they're not used, but if you still want them, they are in a working condition)
DataSet xDataSet = new DataSet();
string WorkBookPath = #"[Excel WorkBook Path]";
//Query one Sheet only. More can be added if necessary
string[] WBSheetsNames = new string[] { "Sheet1" };
//Open the Excel document and assign the DataSource to a dataGridView
xDataSet = Parse(WorkBookPath, WBSheetsNames, null);
dataGridView1.DataSource = xDataSet.Tables[0];
dataGridView1.Refresh();
public DataSet Parse(string fileName, string[] WorkSheets, string[] ranges)
{
if (!File.Exists(fileName)) return null;
string connectionString = string.Format("provider = Microsoft.ACE.OLEDB.12.0; " +
"data source = {0}; " +
"Extended Properties = \"Excel 12.0;HDR=YES\"",
fileName);
DataSet data = new DataSet();
string query = string.Empty;
foreach (string sheetName in GetExcelSheetNames(connectionString))
{
foreach (string WorkSheet in WorkSheets)
if (sheetName == (WorkSheet + "$"))
{
using (OleDbConnection con = new OleDbConnection(connectionString))
{
DataTable dataTable = new DataTable();
if ((ranges == null) ||
(string.IsNullOrEmpty(ranges[0]) || string.IsNullOrEmpty(ranges[1])) ||
(int.Parse(ranges[0]) > int.Parse(ranges[1])))
query = string.Format("SELECT * FROM [{0}]", sheetName);
else if ((int.Parse(ranges[0]) == int.Parse(ranges[1])))
query = string.Format("SELECT * FROM [{0}] WHERE SrNo = {1}", sheetName, ranges[0]);
else
query = string.Format("SELECT * FROM [{0}] WHERE (SrNo BETWEEN {1} AND {2}) " +
"ORDER BY SrNo", sheetName, ranges[0], ranges[1]);
con.Open();
OleDbDataAdapter adapter = new OleDbDataAdapter(query, con);
adapter.Fill(dataTable);
data.Tables.Add(dataTable);
};
}
}
return data;
}
static string[] GetExcelSheetNames(string connectionString)
{
string[] excelSheetNames = null;
using (OleDbConnection con = new OleDbConnection(connectionString))
{
con.Open();
using (DataTable dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null))
{
if (dt != null)
{
excelSheetNames = new string[dt.Rows.Count];
for (int i = 0; i < dt.Rows.Count; i++)
{
excelSheetNames[i] = dt.Rows[i]["TABLE_NAME"].ToString();
}
}
}
}
return excelSheetNames;
}

C# exception: External table is not in the expected format. while using excel with oledb

If anyone can help me out it will be very grateful. I am trying to read an excel (.xlsx, excel-2007) which have different sheets (Headers are not fixed). The below code works for me in most of the cases, but throws exception in some of the cases as entitled.
public static bool ReadExcelData(string ExcelFilePath, string SheetName, out DataTable dt)
{
dt = new DataTable();
bool isXlsx = ExcelFilePath.Substring(ExcelFilePath.LastIndexOf('.') + 1).ToLower() == "xlsx";
string excelConnectString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + ExcelFilePath + ";Extended Properties=\"Excel 8.0;HDR=yes;\"";
if (isXlsx)
excelConnectString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + ExcelFilePath + ";Extended Properties=\"Excel 12.0\";";
OleDbConnection objConn = null;
try
{
objConn = new OleDbConnection(excelConnectString);
if (objConn.State == ConnectionState.Closed)
{
objConn.Open();
dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
}
}
catch (Exception ex)
{
dt = null;
return false;
}
try
{
dt.Clear();
string query = "select * from ["+SheetName+"$] ";
OleDbCommand objCmd = new OleDbCommand(query, objConn);
OleDbDataAdapter objDatAdap = new OleDbDataAdapter();
objDatAdap.SelectCommand = objCmd;
objDatAdap.Fill(dt);
Boolean result = (dt.Rows.Count >= 1) ? true : false;
objConn.Close();
return true;
}
catch (Exception ex)
{
dt = null;
return false;
}
}
If, in case of exception, I open this excel (on which it is giving error) manually (double clicking the excel) before going in to the code, it will not generate any exception, rather reads that excel smoothly.
What can be better or alternative way so that it may work for all the cases?

Issue is in your excel sheet, not in your code, please just saveas your excel sheet in .xls or .xlsx format again and then use the same code. It will work.

Excel Import Error in ASP.net

I am trying to import an excel to database from asp.net website through dataset.
Here is my first part.
int xlColCount = 1;
wb = app.Workbooks.Open(FilePath, 0, false, 5, "", "", true, Ex.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
ws = (Ex.Worksheet)wb.ActiveSheet;
xlColCount = ws.Columns.Count;
xlColCount = ws.UsedRange.Columns.Count;
ws.Columns.ClearFormats();
xlColCount = ws.UsedRange.Columns.Count;
//creating datacolumns
for (int i = 0; i < xlColCount; i++)
{
try
{
DSname.Tables[0].Columns.Add(((Ex.Range)ws.Cells[1,strColArr[i]]).Value2.ToString().Trim());
}
catch(Exception ex)
{
//error occured
}
}
First I am creating the column name based on the excel heading into dataset column. here xlColCount=198 (total no.of columns from the excel template and all are filled ) but when reaching 172th column (i=172) it is giving index out of range error.
What could be the reason? I need to create a dataset with column names from all excel column names.

Check your strColArr[i] array capacity..may be initialized with 172 or less in size.

May be you will have better results (and performance) with ADO.NET and System.Data.OleDb :
string filePath = #"C:\Workbook1.xls";
string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties=\"Excel 8.0\";";
OleDbConnection connection = new OleDbConnection(connectionString);
string cmdText = "SELECT * FROM [Sheet1$]";
OleDbCommand command = new OleDbCommand(cmdText, connection);
command.Connection.Open();
OleDbDataReader reader = command.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
Console.WriteLine("{0}\t{1}", reader[0].ToString(), reader[1].ToString());
}
}

string filePath = "":
OleDbCommand cmd = new OleDbCommand(); ;
OleDbDataAdapter oleda = new OleDbDataAdapter();
DataSet ds = new DataSet();
DataTable dt = new DataTable();
UserBase loginUser = (UserBase)Session["LoggedUser"];
SearchFilter filter = new SearchFilter();
string action = "ExportDocumentType";
filter.DocumentTypeID = Convert.ToInt32(cmbDocumentType.SelectedValue);
filter.DepartmentID = Convert.ToInt32(cmbDepartment.SelectedValue);
try
{
Logger.Trace("Started Extracting Soft Data", Session["LoggedUserId"].ToString());
// need to pass relative path after deploying on server
oledbConn = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
filePath + ";Extended Properties='Excel 12.0;';");
try
{
oledbConn.Open();
}
catch
{
string con = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + filePath + ";" + "Extended Properties=Excel 8.0;HDR=Yes;IMEX=1";
oledbConn = new OleDbConnection(con);
oledbConn.Open();
}
// Get the data table containg the schema guid.
dt = oledbConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
throw new Exception(" No sheets available!");
}
String[] excelSheets = new String[dt.Rows.Count];
int i = 0;
// Add the sheet name to the string array.
foreach (DataRow row in dt.Rows)
{
excelSheets[i] = row["TABLE_NAME"].ToString();
i++;
}
cmd.Connection = oledbConn;
cmd.CommandType = CommandType.Text;
// Get column names of selected document type
string SelectCommand = getIndexFieldsList();
SelectCommand = "SELECT " + SelectCommand + " FROM [" + excelSheets[0] + "]";
cmd.CommandText = SelectCommand;
oleda = new OleDbDataAdapter(cmd);
try
{
oleda.Fill(ds);
}
catch
{
throw new Exception("Selected file is not matching to " + cmbDocumentType.SelectedItem.Text + ".");//Bug Wrtier DMS ENHSMT 1-1012 M
}
string strXml = string.Empty;
if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
{
// note: Do ur code here.. i prefer to create a insert satement from here using looping it out
}
else
{
throw new Exception(" No data available in uploaded file!");//Bug Wrtier DMS ENHSMT 1-1012 M
}
}
catch (Exception ex)
{
Logger.Trace("Exception:" + ex.Message, Session["LoggedUserId"].ToString());
throw new Exception(ex.Message.ToString());
}
finally
{
// Clean up.
if (oledbConn != null)
{
oledbConn.Close();
oledbConn.Dispose();
}
if (dt != null)
{
dt.Dispose();
}
if (ds != null)
{
ds.Dispose();
}
}
}

Get Excel data range using oledb in c#

I want to get excel sheet used data range by using oledb.
Code is below,
String strExcelConn = "Provider=Microsoft.Jet.OLEDB.4.0;"
+ "Data Source=E:\\DOTNET\\CrsMicro\\CA.xls;"
+ "Extended Properties='Excel 8.0;HDR=Yes'";
using (OleDbConnection connExcel = new OleDbConnection(strExcelConn))
{
string selectString = "SELECT * FROM [CA$A1:D500]";
using (OleDbCommand cmdExcel = new OleDbCommand(selectString,connExcel))
{
cmdExcel.Connection = connExcel;
connExcel.Open();
DataTable dt=new DataTable();
OleDbDataAdapter adp = new OleDbDataAdapter();
adp.SelectCommand = cmdExcel;
adp.FillSchema(dt, SchemaType.Source);
adp.Fill(dt);
int range=dt.Columns.Count;
int row = dt.Rows.Count;
//var result = cmdExcel.ExecuteReader();
//DataTable dtExcelSchema;
//dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
// string excelsheetname = dtExcelSchema.Rows[0].ItemArray[2].ToString();
connExcel.Close();
//string sheetName = dtExcelSchema.Rows[0]["TABLE_NAME"].ToString();
}
}
my sheet range is not always A1:D500, it may vary frequently. So i need to get the sheet range dynamically. I know this can be achieved by interop, but i need to do it in oledb. Any suggestion?

create a named range:
https://msdn.microsoft.com/EN-US/library/office/ff196817.aspx
and replace selectString to
"SELECT * FROM [CA$MyNamedRange]"

Hi I'm also working on same kind of problem in OLEDB C# excel, I found below solution. It works for me. But I'm new to C#, I'm not sure how efficient it is.
But it is satisfying my requirements so far. This may be helpful for others.
I was able to get dynamic range in an excel sheet from a browsed input excel file (make sure excel file doesn't contain hidden sheets). This works perfectly for excel workbook containing single sheet. I haven't tested with multiple sheets.
Range: A [stat value]: Column Name[0] // Returns all rows from start value till the column name.
Example: A1:M0 // It will return all rows from A1 till column M. So here no need to worry how many rows you have in your excel.
Just by giving Column Name[0] takes all rows from the starting till the column M.
So '0' will be our outer range.
//Code under actual c# clas file where we are uploading excel.
Excel_Common excelComm = new Excel_Common(); // object to Excel_Common class file
string rangeStringwithSHeet =excelComm.GetSheetName(filepath).ToString().Trim('\'') + GetRange(excelComm.GetSheetName(filepath), excelComm.ExcelConn(filepath));
queryForExcelInput = string.Format("SELECT * FROM [{0}]", rangeStringwithSHeet);
Econ1 = new OleDbConnection(excelComm.ExcelConn(filepath));
Econ1.Open();
dataExcelInputTable = new DataTable();
OleDbCommand oleDbCommand1 = new OleDbCommand(queryForExcelInput, Econ1);
OleDbDataAdapter oleDbDaAdapter1 = new OleDbDataAdapter(oleDbCommand1);
oleDbDaAdapter1.Fill(dataExcelInputTable);
Excel_Common class file has below methods:
//Get Range like A4:M30
public string GetRange(string SheetName, string excelConnectionString)
{
string rangeInput = "",rangeColName="";
int columnsCount = 0;
int rowStartRange = 0;
columnsCount = GetNumberOfColumnsInSheet(SheetName, excelConnectionString);
rowStartRange = GetStartRowRange(SheetName, excelConnectionString); // This is optional if you want always A1. just assign 1 here
while (columnsCount > 0)
{
columnsCount--;
rangeColName = (char)('A' + columnsCount % 26) + rangeColName;
columnsCount /= 26;
}
rangeInput = "A" + rowStartRange + ":" + rangeColName + "0";
return rangeInput;
}
// Get Sheet Name assuming only one sheet for workbook and no hidden sheets
public string GetSheetName(string filepath)
{
string sheetname = "";
String connect = ExcelConn(filepath);
OleDbConnection con = new OleDbConnection(connect);
con.Open();
DataTable tables = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
foreach (DataRow row in tables.Rows)
{
sheetname = row[2].ToString();
if (!sheetname.EndsWith("$"))
continue;
}
con.Close();
return sheetname;
}
// Get number of columns in a given sheet
public int GetNumberOfColumnsInSheet(string SheetName, string excelConnectionString)
{
int columnsCount = 0;
//If a valid excel file
if (!string.IsNullOrEmpty(excelConnectionString))
{
using (OleDbConnection conn = new OleDbConnection(excelConnectionString))
{
conn.Open();
DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, null);
if (dt.Rows.Count > 0)
columnsCount = dt.AsEnumerable().Where(a => a["TABLE_NAME"].ToString() == SheetName).Count();
conn.Close();
}
}
return columnsCount;
}
// Get the first row count in sheet contains some keyword . This method call is optional if you always want A1. Here I need to check some keyword exist and from there only I have to start something like A4
public int GetStartRowRange(string SheetName, string excelConnectionString)
{
int rowStartRange = 1;
//If a valid excel file
if (!string.IsNullOrEmpty(excelConnectionString))
{
using (OleDbConnection conn = new OleDbConnection(excelConnectionString))
{
string colValue;
conn.Open();
string cmdstr = "select * from [" + SheetName + "]";
OleDbCommand com = new OleDbCommand(cmdstr, conn);
DataTable dt = new DataTable();
OleDbDataAdapter da = new OleDbDataAdapter(com);
da.Fill(dt);
// get first row data where it started
foreach (DataRow dataRow in dt.Rows)
{
colValue = dataRow[0].ToString();
if ((colValue.Contains("Value1") || colValue.Contains("Value2") || colValue.Contains("Value3")) && (string.IsNullOrEmpty(dataRow[1].ToString()) == false))
{
rowStartRange = rowStartRange + 1;
break;
}
else
{
rowStartRange = rowStartRange + 1;
}
}
conn.Close();
}
}
return rowStartRange;
}
// Connection to excel document
public string ExcelConn(string FilePath)
{
string constr = "";
string extension = Path.GetExtension(FilePath);
//Checking for the extentions, if XLS connect using Jet OleDB
if (extension.Equals(".xls", StringComparison.CurrentCultureIgnoreCase))
{
constr = string.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0};Extended Properties=\"Excel 12.0;IMEX=1;HDR=YES\"", FilePath);
}
//Use ACE OleDb if xlsx extention
else if (extension.Equals(".xlsx", StringComparison.CurrentCultureIgnoreCase))
{
constr = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 8.0;IMEX=1;HDR=YES\"", FilePath);
}
return constr;
} // end of ExcelConn method

Best /Fastest way to read an Excel Sheet into a DataTable?

I'm hoping someone here can point me in the right direction - I'm trying to create a fairly robust utility program to read the data from an Excel sheet (may be .xls OR .xlsx) into a DataTable as quickly and leanly as possible.
I came up with this routine in VB (although I'd be just as happy with a good C# answer):
Public Shared Function ReadExcelIntoDataTable(ByVal FileName As String, ByVal SheetName As String) As DataTable
Dim RetVal As New DataTable
Dim strConnString As String
strConnString = "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};DBQ=" & FileName & ";"
Dim strSQL As String
strSQL = "SELECT * FROM [" & SheetName & "$]"
Dim y As New Odbc.OdbcDataAdapter(strSQL, strConnString)
y.Fill(RetVal)
Return RetVal
End Function
I'm wondering if this is the best way to do it or if there are better / more efficent ways (or just more intelligent ways - Maybe Linq / native .Net providers) to use instead?
ALSO, just a quick and silly additional question - Do I need to include code such as y.Dispose() and y = Nothing or will that be taken care of since the variable should die at the end of the routine, right??
Thanks!!

If you want to do the same thing in C# based on Ciarán Answer
string sSheetName = null;
string sConnection = null;
DataTable dtTablesList = default(DataTable);
OleDbCommand oleExcelCommand = default(OleDbCommand);
OleDbDataReader oleExcelReader = default(OleDbDataReader);
OleDbConnection oleExcelConnection = default(OleDbConnection);
sConnection = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Test.xls;Extended Properties=\"Excel 12.0;HDR=No;IMEX=1\"";
oleExcelConnection = new OleDbConnection(sConnection);
oleExcelConnection.Open();
dtTablesList = oleExcelConnection.GetSchema("Tables");
if (dtTablesList.Rows.Count > 0)
{
sSheetName = dtTablesList.Rows[0]["TABLE_NAME"].ToString();
}
dtTablesList.Clear();
dtTablesList.Dispose();
if (!string.IsNullOrEmpty(sSheetName)) {
oleExcelCommand = oleExcelConnection.CreateCommand();
oleExcelCommand.CommandText = "Select * From [" + sSheetName + "]";
oleExcelCommand.CommandType = CommandType.Text;
oleExcelReader = oleExcelCommand.ExecuteReader();
nOutputRow = 0;
while (oleExcelReader.Read())
{
}
oleExcelReader.Close();
}
oleExcelConnection.Close();
here is another way read Excel into a DataTable without using OLEDB
very quick
Keep in mind that the file ext would have to be .CSV for this to work properly
private static DataTable GetDataTabletFromCSVFile(string csv_file_path)
{
csvData = new DataTable(defaultTableName);
try
{
using (TextFieldParser csvReader = new TextFieldParser(csv_file_path))
{
csvReader.SetDelimiters(new string[]
{
tableDelim
});
csvReader.HasFieldsEnclosedInQuotes = true;
string[] colFields = csvReader.ReadFields();
foreach (string column in colFields)
{
DataColumn datecolumn = new DataColumn(column);
datecolumn.AllowDBNull = true;
csvData.Columns.Add(datecolumn);
}
while (!csvReader.EndOfData)
{
string[] fieldData = csvReader.ReadFields();
//Making empty value as null
for (int i = 0; i < fieldData.Length; i++)
{
if (fieldData[i] == string.Empty)
{
fieldData[i] = string.Empty; //fieldData[i] = null
}
//Skip rows that have any csv header information or blank rows in them
if (fieldData[0].Contains("Disclaimer") || string.IsNullOrEmpty(fieldData[0]))
{
continue;
}
}
csvData.Rows.Add(fieldData);
}
}
}
catch (Exception ex)
{
}
return csvData;
}

I have always used OLEDB for this, something like...
Dim sSheetName As String
Dim sConnection As String
Dim dtTablesList As DataTable
Dim oleExcelCommand As OleDbCommand
Dim oleExcelReader As OleDbDataReader
Dim oleExcelConnection As OleDbConnection
sConnection = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Test.xls;Extended Properties=""Excel 12.0;HDR=No;IMEX=1"""
oleExcelConnection = New OleDbConnection(sConnection)
oleExcelConnection.Open()
dtTablesList = oleExcelConnection.GetSchema("Tables")
If dtTablesList.Rows.Count > 0 Then
sSheetName = dtTablesList.Rows(0)("TABLE_NAME").ToString
End If
dtTablesList.Clear()
dtTablesList.Dispose()
If sSheetName <> "" Then
oleExcelCommand = oleExcelConnection.CreateCommand()
oleExcelCommand.CommandText = "Select * From [" & sSheetName & "]"
oleExcelCommand.CommandType = CommandType.Text
oleExcelReader = oleExcelCommand.ExecuteReader
nOutputRow = 0
While oleExcelReader.Read
End While
oleExcelReader.Close()
End If
oleExcelConnection.Close()
The ACE.OLEDB provider will read both .xls and .xlsx files and I have always found the speed quite good.

public DataTable ImportExceltoDatatable(string filepath)
{
// string sqlquery= "Select * From [SheetName$] Where YourCondition";
string sqlquery = "Select * From [SheetName$] Where Id='ID_007'";
DataSet ds = new DataSet();
string constring = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties=\"Excel 12.0;HDR=YES;\"";
OleDbConnection con = new OleDbConnection(constring + "");
OleDbDataAdapter da = new OleDbDataAdapter(sqlquery, con);
da.Fill(ds);
DataTable dt = ds.Tables[0];
return dt;
}

This seemed to work pretty well for me.
private DataTable ReadExcelFile(string sheetName, string path)
{
using (OleDbConnection conn = new OleDbConnection())
{
DataTable dt = new DataTable();
string Import_FileName = path;
string fileExtension = Path.GetExtension(Import_FileName);
if (fileExtension == ".xls")
conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Import_FileName + ";" + "Extended Properties='Excel 8.0;HDR=YES;'";
if (fileExtension == ".xlsx")
conn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Import_FileName + ";" + "Extended Properties='Excel 12.0 Xml;HDR=YES;'";
using (OleDbCommand comm = new OleDbCommand())
{
comm.CommandText = "Select * from [" + sheetName + "$]";
comm.Connection = conn;
using (OleDbDataAdapter da = new OleDbDataAdapter())
{
da.SelectCommand = comm;
da.Fill(dt);
return dt;
}
}
}
}

You can use OpenXml SDK for *.xlsx files. It works very quickly. I made simple C# IDataReader implementation for this sdk. See here. Now you can easy read excel file to DataTable and you can import excel file to sql server database (use SqlBulkCopy). ExcelDataReader reads very fast. On my machine 10000 records less 3 sec and 60000 less 8 sec.
Read to DataTable example:
class Program
{
static void Main(string[] args)
{
var dt = new DataTable();
using (var reader = new ExcelDataReader(#"data.xlsx"))
dt.Load(reader);
Console.WriteLine("done: " + dt.Rows.Count);
Console.ReadKey();
}
}

I found it pretty easy like this
using System;
using System.Data;
using System.IO;
using Excel;
public DataTable ExcelToDataTableUsingExcelDataReader(string storePath)
{
FileStream stream = File.Open(storePath, FileMode.Open, FileAccess.Read);
string fileExtension = Path.GetExtension(storePath);
IExcelDataReader excelReader = null;
if (fileExtension == ".xls")
{
excelReader = ExcelReaderFactory.CreateBinaryReader(stream);
}
else if (fileExtension == ".xlsx")
{
excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
}
excelReader.IsFirstRowAsColumnNames = true;
DataSet result = excelReader.AsDataSet();
var test = result.Tables[0];
return result.Tables[0];
}
Note: you need to install SharpZipLib package for this
Install-Package SharpZipLib
neat and clean! ;)

This is the way to read from excel oledb
try
{
System.Data.OleDb.OleDbConnection MyConnection;
System.Data.DataSet DtSet;
System.Data.OleDb.OleDbDataAdapter MyCommand;
string strHeader7 = "";
strHeader7 = (hdr7) ? "Yes" : "No";
MyConnection = new System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fn + ";Extended Properties=\"Excel 12.0;HDR=" + strHeader7 + ";IMEX=1\"");
MyCommand = new System.Data.OleDb.OleDbDataAdapter("select * from [" + wks + "$]", MyConnection);
MyCommand.TableMappings.Add("Table", "TestTable");
DtSet = new System.Data.DataSet();
MyCommand.Fill(DtSet);
dgv7.DataSource = DtSet.Tables[0];
MyConnection.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}

The below code is tested by myself and is very simple, understandable, usable and fast.
This code, initially takes all sheet names, then puts all tables of that excel file in a DataSet.
public static DataSet ToDataSet(string exceladdress, int startRecord = 0, int maxRecord = -1, string condition = "")
{
DataSet result = new DataSet();
using (OleDbConnection connection = new OleDbConnection(
(exceladdress.TrimEnd().ToLower().EndsWith("x"))
? "Provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + exceladdress + "';" + "Extended Properties='Excel 12.0 Xml;HDR=YES;'"
: "provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + exceladdress + "';Extended Properties=Excel 8.0;"))
try
{
connection.Open();
DataTable schema = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
foreach (DataRow drSheet in schema.Rows)
if (drSheet["TABLE_NAME"].ToString().Contains("$"))
{
string s = drSheet["TABLE_NAME"].ToString();
if (s.StartsWith("'")) s = s.Substring(1, s.Length - 2);
System.Data.OleDb.OleDbDataAdapter command =
new System.Data.OleDb.OleDbDataAdapter(string.Join("", "SELECT * FROM [", s, "] ", condition), connection);
DataTable dt = new DataTable();
if (maxRecord > -1 && startRecord > -1) command.Fill(startRecord, maxRecord, dt);
else command.Fill(dt);
result.Tables.Add(dt);
}
return result;
}
catch (Exception ex) { return null; }
finally { connection.Close(); }
}
Enjoy...

''' <summary>
''' ReadToDataTable reads the given Excel file to a datatable.
''' </summary>
''' <param name="table">The table to be populated.</param>
''' <param name="incomingFileName">The file to attempt to read to.</param>
''' <returns>TRUE if success, FALSE otherwise.</returns>
''' <remarks></remarks>
Public Function ReadToDataTable(ByRef table As DataTable,
incomingFileName As String) As Boolean
Dim returnValue As Boolean = False
Try
Dim sheetName As String = ""
Dim connectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & incomingFileName & ";Extended Properties=""Excel 12.0;HDR=No;IMEX=1"""
Dim tablesInFile As DataTable
Dim oleExcelCommand As OleDbCommand
Dim oleExcelReader As OleDbDataReader
Dim oleExcelConnection As OleDbConnection
oleExcelConnection = New OleDbConnection(connectionString)
oleExcelConnection.Open()
tablesInFile = oleExcelConnection.GetSchema("Tables")
If tablesInFile.Rows.Count > 0 Then
sheetName = tablesInFile.Rows(0)("TABLE_NAME").ToString
End If
If sheetName <> "" Then
oleExcelCommand = oleExcelConnection.CreateCommand()
oleExcelCommand.CommandText = "Select * From [" & sheetName & "]"
oleExcelCommand.CommandType = CommandType.Text
oleExcelReader = oleExcelCommand.ExecuteReader
'Determine what row of the Excel file we are on
Dim currentRowIndex As Integer = 0
While oleExcelReader.Read
'If we are on the First Row, then add the item as Columns in the DataTable
If currentRowIndex = 0 Then
For currentFieldIndex As Integer = 0 To (oleExcelReader.VisibleFieldCount - 1)
Dim currentColumnName As String = oleExcelReader.Item(currentFieldIndex).ToString
table.Columns.Add(currentColumnName, GetType(String))
table.AcceptChanges()
Next
End If
'If we are on a Row with Data, add the data to the SheetTable
If currentRowIndex > 0 Then
Dim newRow As DataRow = table.NewRow
For currentFieldIndex As Integer = 0 To (oleExcelReader.VisibleFieldCount - 1)
Dim currentColumnName As String = table.Columns(currentFieldIndex).ColumnName
newRow(currentColumnName) = oleExcelReader.Item(currentFieldIndex)
If IsDBNull(newRow(currentFieldIndex)) Then
newRow(currentFieldIndex) = ""
End If
Next
table.Rows.Add(newRow)
table.AcceptChanges()
End If
'Increment the CurrentRowIndex
currentRowIndex += 1
End While
oleExcelReader.Close()
End If
oleExcelConnection.Close()
returnValue = True
Catch ex As Exception
'LastError = ex.ToString
Return False
End Try
Return returnValue
End Function

Use the below snippet it will be helpfull.
string POCpath = #"G:\Althaf\abc.xlsx";
string POCConnection = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + POCpath + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\";";
OleDbConnection POCcon = new OleDbConnection(POCConnection);
OleDbCommand POCcommand = new OleDbCommand();
DataTable dt = new DataTable();
OleDbDataAdapter POCCommand = new OleDbDataAdapter("select * from [Sheet1$] ", POCcon);
POCCommand.Fill(dt);
Console.WriteLine(dt.Rows.Count);

I've used this method and for me, it is so efficient and fast.
// Step 1. Download NuGet source of Generic Parsing by Andrew Rissing
// Step 2. Reference this to your project
// Step 3. Reference Microsoft.Office.Interop.Excel to your project
// Step 4. Follow the logic below
public static DataTable ExcelSheetToDataTable(string filePath) {
// Save a copy of the Excel file as CSV
var xlApp = new XL.Application();
var xlWbk = xlApp.Workbooks.Open(filePath);
var tempPath =
Path.Combine(Environment
.GetFolderPath(Environment.SpecialFolder.UserProfile)
, "AppData"
, "Local",
, "Temp"
, Path.GetFileNameWithoutExtension(filePath) + ".csv");
xlApp.DisplayAlerts = false;
xlWbk.SaveAs(tempPath, XL.XlFileFormat.xlCSV);
xlWbk.Close(SaveChanges: false);
xlApp.Quit();
// The actual parsing
using (var parser = new GenericParserAdapter(tempPath)) {
parser.FirstRowHasHeader = true;
return parser.GetDataTable();
}
}
Generic Parsing by Andrew Rissing

Here is another way of doing it
public DataSet CreateTable(string source)
{
using (var connection = new OleDbConnection(GetConnectionString(source, true)))
{
var dataSet = new DataSet();
connection.Open();
var schemaTable = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (schemaTable == null)
return dataSet;
var sheetName = "";
foreach (DataRow row in schemaTable.Rows)
{
sheetName = row["TABLE_NAME"].ToString();
break;
}
var command = string.Format("SELECT * FROM [{0}$]", sheetName);
var adapter = new OleDbDataAdapter(command, connection);
adapter.TableMappings.Add("TABLE", "TestTable");
adapter.Fill(dataSet);
connection.Close();
return dataSet;
}
}
//
private string GetConnectionString(string source, bool hasHeader)
{
return string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};
Extended Properties=\"Excel 12.0;HDR={1};IMEX=1\"", source, (hasHeader ? "YES" : "NO"));
}