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How can read excel sheet 2016 using c# code

I am reading excel sheet using below code but that gives blank data table.
public static DataTable ReadExcel(string fileName)
{
string fileExt = ".xlsx";
string conn = string.Empty;
DataTable dtexcel = new DataTable();
if (fileExt.CompareTo(".xlsx") == 0)
conn = #"provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileName + ";Extended Properties='Excel 8.0;HRD=Yes;IMEX=1';"; //for below excel 2007
else
conn = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties='Excel 12.0 Xml;HDR=YES';"; //for above excel 2007
using (OleDbConnection con = new OleDbConnection(conn))
{
try
{
OleDbDataAdapter oleAdpt = new OleDbDataAdapter("select * from [Sheet1$]", con); //here we read data from sheet1
oleAdpt.Fill(dtexcel); //fill excel data into dataTable
}
catch(Exception ex) { }
}
return dtexcel;
}
It displays empty data table as below screenshot.

you forgot few things, like OleDbConnection.Open(); and using OleDbCommand
public DataTable ReadExcel(string fileName)
{
string fileExt = ".xlsx";
string sheetName = "Sheet1$";
string conn = string.Empty;
DataTable dt = new DataTable();
if (fileExt.CompareTo(".xlsx") != 0)
conn = #"provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileName + ";Extended Properties='Excel 8.0;HRD=Yes;IMEX=1';"; //for below excel 2007
else
conn = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties='Excel 12.0 Xml;HDR=YES';"; //for above excel 2007
using (OleDbConnection con = new OleDbConnection(conn))
using ( OleDbCommand cmd = new OleDbCommand())
{
con.Open();
try
{
cmd.Connection = con;
cmd.CommandText = "SELECT * FROM [" + sheetName + "]";
dt.TableName = sheetName;
using (OleDbDataAdapter da = new OleDbDataAdapter(cmd))
{
da.Fill(dt);
}
}
catch (Exception ex) { }
}
return dt;
}

try rhis code hope it help you
protected void btn_Click(object sender, EventArgs e)
{
string filename = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
FileUpload1.SaveAs(Server.MapPath("File/" + filename));
string CurrentFilePath = Server.MapPath("File/" + filename);
string connectString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + CurrentFilePath + ";Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1;\"";
OleDbConnection conn = new OleDbConnection(connectString);
conn.Open();
DataTable Sheets = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
foreach (DataRow dr in Sheets.Rows)
{
string sht = dr[2].ToString().Replace("'", "");
OleDbDataAdapter da = new OleDbDataAdapter("Select * From [" + sht + "]", conn);
DataTable dt = new DataTable();
da.Fill(dt);
}
}

For me working following code
string filePath = AppDomain.CurrentDomain.BaseDirectory.Replace("\\bin\\Debug", "").Replace("\\bin\\Release", "");
string fileLocation = filePath + ConfigurationManager.AppSettings["EmployeeDetailsFilePath"];
Stream inputStream = File.Open(fileLocation, FileMode.Open, FileAccess.Read);
IExcelDataReader reader = ExcelReaderFactory.CreateOpenXmlReader(inputStream);
reader.IsFirstRowAsColumnNames = true;
DataSet dataSet = reader.AsDataSet();
inputStream.Dispose();
reader.Dispose();
here must add reference of ExcelDataReader dll in your project.

Unable to import excel to DB table in server

I am using the below code to import excel data into DB table. The code works fine in my local and when I move this code to server the import fails in between. Also I don't get any error messages and I get a message data saved successfully.
For Ex: The excel has 75,000 data's and only 13,500 records are getting inserted and the size of the excel file is 5 MB.
Any suggestions about the possible problems?
CS:
protected void btnImportData_Click(object sender, EventArgs e)
{
try
{
string strCS = string.Empty; ;
string strFileType = Path.GetExtension(FileUploadExcel.FileName).ToLower();
string query = "";
lblError.Text = "";
string FileName = string.Empty;
FileName = Path.GetFileName(FileUploadExcel.PostedFile.FileName);
string Extension = Path.GetExtension(FileUploadExcel.PostedFile.FileName);
string FolderPath = ConfigurationManager.AppSettings["FolderPath"];
string path = Path.GetFileName(Server.MapPath(FileUploadExcel.FileName));
System.IO.File.Delete(Server.MapPath(FolderPath) + path);
FileUploadExcel.SaveAs(Server.MapPath(FolderPath) + path);
string filePath = Server.MapPath(FolderPath) + path;
if (strFileType != String.Empty)
{
if (strFileType.Trim() == ".xls")
{
strCS = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
}
else if (strFileType.Trim() == ".xlsx")
{
strCS = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
}
else
{
ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Please upload the correct file format')", true);
return;
}
try
{
OleDbConnection conn = new OleDbConnection(strCS);
if (conn.State == ConnectionState.Closed)
conn.Open();
System.Data.DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string sheetname = dt.Rows[0]["Table_Name"].ToString();
query = "SELECT * FROM [" + sheetname + "]";
OleDbCommand cmd = new OleDbCommand(query, conn);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
if (conn.State == ConnectionState.Open)
{
conn.Close();
conn = null;
}
string strSqlTable = "TABLENAME";
string sclearsql = "delete from " + strSqlTable;
SqlConnection sqlconn = new SqlConnection(strCon);
SqlCommand sqlcmd = new SqlCommand(sclearsql, sqlconn);
sqlconn.Open();
sqlcmd.ExecuteNonQuery();
sqlconn.Close();
OleDbConnection oledbconn = new OleDbConnection(strCS);
oledbconn.Open();
OleDbCommand oledbcmd = new OleDbCommand(query, oledbconn);
oledbcmd.CommandTimeout = 120;
OleDbDataReader dReader = oledbcmd.ExecuteReader();
SqlBulkCopy bulkCopy = new SqlBulkCopy(strCon);
bulkCopy.DestinationTableName = strSqlTable;
bulkCopy.BulkCopyTimeout = 120;
bulkCopy.BatchSize = 1000;
bulkCopy.WriteToServer(dReader);
oledbconn.Close();
ClientScript.RegisterStartupScript(Page.GetType(), "alert", "alert('Data saved successfully');window.location='Panel.aspx';", true);
}
catch (Exception ex)
{
lblError.Text = "Upload status: The file could not be uploaded due to following reasons.Please check: " + ex.Message;
}
}
else
{
ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Please select a file to import the data.')", true);
}
}
catch (Exception ex)
{
lblError.Text = "Upload status: The file could not be uploaded due to following reasons.Please check: " + ex.Message;
}
}

Hi remove the data reader on you code which read the excel file twice and use the dataset to fill out your SQL table:
See below:
DataTable dtexcel = new DataTable();
using (OleDbConnection conn = new OleDbConnection(strCS))
{
conn.Open();
DataTable schemaTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
//Looping a first Sheet of Xl File
DataRow schemaRow = schemaTable.Rows[0];
string sheet = schemaRow["TABLE_NAME"].ToString();
if (!sheet.EndsWith("_"))
{
string query = "SELECT * FROM [" + sheet + "]";
OleDbDataAdapter daexcel = new OleDbDataAdapter(query, conn);
dtexcel.Locale = CultureInfo.CurrentCulture;
daexcel.Fill(dtexcel);
}
}
using (SqlConnection sqlconn = new SqlConnection(strCon))
{
SqlCommand sqlcmd = new SqlCommand(sclearsql, sqlconn);
sqlconn.Open();
sqlcmd.ExecuteNonQuery();
}
using (SqlConnection sqlconn = new SqlConnection(strCon))
{
using (SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(sqlconn))
{
//Set the database table name
sqlBulkCopy.DestinationTableName = strSqlTable;
sqlconn.Open();
sqlBulkCopy.WriteToServer(dtexcel);
}
}

Have you tried using the dts wizard? it is a nice tool if you have a excel sheet with data.
you use it by opening the command prompt. windowsbutton + r, and the write cmd.
and from in here you write dtswizard
then a wizard opens in a new window where you can select the excel sheet that you want to insert. There is many tutorials on google.
Hope you can use this

When I try to import an Excel spreadsheet in SQL I get an error

Below is my code, any help will be greatly appreciated
:The Microsoft Office Access database engine could not find the object 'Breach'. Make sure the object exists and that you spell its name and the path name correctly.
public void importdatafromexcel(string excelfilepath)
{
string ssqltable = "Testing";
string myexceldataquery = "select [Case Owner],[Case Number],[Severity] from [Breach]";
try
{
string sexcelconnectionstring = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelfilepath + ";Extended Properties=Excel 12.0;";
string ssqlconnectionstring = "Persist Security Info=False;Integrated Security=true;Initial Catalog=0Breach;server= CHAUDAHARI-J1-W\\SQLEXPRESS";
string sclearsql = "delete from " + ssqltable;
SqlConnection sqlconn = new SqlConnection(ssqlconnectionstring);
SqlCommand sqlcmd = new SqlCommand(sclearsql, sqlconn);
sqlconn.Open();
sqlcmd.ExecuteNonQuery();
sqlconn.Close();
OleDbConnection oledbconn = new OleDbConnection(sexcelconnectionstring);
OleDbCommand oledbcmd = new OleDbCommand(myexceldataquery, oledbconn);
oledbconn.Open();
OleDbDataReader dr = oledbcmd.ExecuteReader();
SqlBulkCopy bulkcopy = new SqlBulkCopy(ssqlconnectionstring);
bulkcopy.DestinationTableName = ssqltable;
while (dr.Read())
{
bulkcopy.WriteToServer(dr);
}
oledbconn.Close();
}
catch (Exception ex)
{
txtProcessingStatus.Text = ex.Message;
}
}

select [Case Owner],[Case Number],[Severity] from [Breach]
Is there a worksheet named "Breach" in the Excel file you are opening? In your statement above, I believe [Breach] should be the name of the worksheet you are looking for in the Excel file you are opening.

Uploading a file into SQL Server

Reword the question... the below code inserts the data into an SQL Server database, and into the correct table however, the data is not inserted correctly... here is the code
if (FileUpload1.HasFile)
{
string path = string.Concat((Server.MapPath("~/temp/" + FileUpload1.FileName)));
FileUpload1.PostedFile.SaveAs(path);
OleDbConnection OleDbcon = new OleDbConnection(#"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\";");
OleDbCommand cmd = new OleDbCommand("select * from [Sheet1$]", OleDbcon);
OleDbDataAdapter objAdapter1 = new OleDbDataAdapter(cmd);
OleDbcon.Open();
DbDataReader dr = cmd.ExecuteReader();
string con_str = #"Data Source=ENERGYSQL\ENERGY;Initial Catalog=ProjectHandler;Persist Security Info=True;User ID=aconyon;Password=birchall";
SqlBulkCopy bulkInsert = new SqlBulkCopy(con_str);
bulkInsert.DestinationTableName = "StockTable";
bulkInsert.WriteToServer(dr);
OleDbcon.Close();
Array.ForEach(Directory.GetFiles((Server.MapPath("~/temp/"))), File.Delete);
//Label1.ForeColor = Color.Green;
Label1.Text = "Successfully inserted";
}
else
{
//Label1.ForeColor = ConsoleColor.Red;
Label1.Text = "please select ther File";
}
what this code does is select the far most right column, in my example Quantity, and insert just this into the database, ignoring all other rows (A and B) do i need to change the OleDbCommand to select certain rows. A(ItemName), B(Date), C(Quantity)

use this code.
string excelConnectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data
Source={0};Extended Properties='Excel 8.0;HRD=YES;IMEX=1'",
Server.MapPath(#"~\DownloadedExcelFilesOp4\myfile" + fileExt));// + "\\" +
FileUploadControl.PostedFile.FileName.ToString());
using (OleDbConnection connection = new OleDbConnection(excelConnectionString))
{
OleDbCommand command = new OleDbCommand(("Select [Demo1] ,[Demo2] FROM [Sheet1$]"),
connection);
connection.Open();
using (DbDataReader dr = command.ExecuteReader())
{
}
}

You can use query like below to get the value of any particular column.
OleDbCommand command = new OleDbCommand(("Select [Col1] ,[Col2] FROM [Sheet1$]"),
connection);

Upload an excel File to Database

I want to import data from an Excel 2003 file, but my C# program gives error
External table is not in the expected format
I use this code:
string ExcelContentType = "application/vnd.ms-excel";
string Excel2010ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
if (fileuploadExcel.HasFile)
{
//Check the Content Type of the file
if (fileuploadExcel.PostedFile.ContentType == ExcelContentType || fileuploadExcel.PostedFile.ContentType == Excel2010ContentType)
{
try
{
//Save file path
string path = string.Concat(Server.MapPath("~/TempFiles/"), fileuploadExcel.FileName);
//Save File as Temp then you can delete it if you want
fileuploadExcel.SaveAs(path);
string excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";
// Create Connection to Excel Workbook
using (OleDbConnection connection = new OleDbConnection(excelConnectionString))
{
OleDbCommand command = new OleDbCommand("Select * FROM [Sheet1$]", connection);
connection.Open();
// Create DbDataReader to Data Worksheet
using (DbDataReader dr = command.ExecuteReader())
{
// SQL Server Connection String
string sqlConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString.ToString();
// Bulk Copy to SQL Server
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString))
{
bulkCopy.DestinationTableName = "Excel_table";
bulkCopy.WriteToServer(dr);
lblMessage.Text = "The data has been exported succefuly from Excel to SQL";
}
}
}
}
catch (Exception ex)
{
lblMessage.Text = ex.Message;
}
}
}

Hi here i am using this to import from Excel File.Try this.Works 100%...
Here you should have a folder inside your application named as "Files" where after uploading your excel file,it will be stored and your program will read from the excel file available inside "Files" Folder.
protected void btnImport_Click(object sender, EventArgs e)
{
ArrayList alist = new ArrayList();
string connString = "";
string strFileType = Path.GetExtension(fileuploadExcel.FileName).ToLower();
string fileBasePath = Server.MapPath("~/Files/");
string fileName = Path.GetFileName(this.fileuploadExcel.FileName);
string fullFilePath = fileBasePath + fileName;
//Connection String to Excel Workbook
if (strFileType.Trim() == ".xls")
{
connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fullFilePath +
";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";
}
else if (strFileType.Trim() == ".xlsx")
{
connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fullFilePath +
";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\"";
}
if (fileuploadExcel.HasFile)
{
string query = "SELECT [UserName],[Education],[Location] FROM [Sheet1$]";
using(OleDbConnection conn = new OleDbConnection(connString))
{
if (conn.State == ConnectionState.Closed)
conn.Open();
OleDbCommand cmd = new OleDbCommand(query, conn);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
Session["griddata"] = ds.Tables[0];
grvExcelData.DataSource = Session["griddata"];
grvExcelData.DataBind();
}
}
}

Try this: Connection String
string connStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";

You can use SSIS tool( Sql server integration services)
create connection to excel sheet then add source and destination
your source will be excel sheet and your destination will be Database table
ok?
if you need more info please tell me...