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Excel to datagridview: Not displaying numbered cells to grid c# web application

i am developing a C# web application which need to process an excel sheet containing names of places and deposits and withdrawals which will be sorted and displayed in datagridview and later it will be saved in a microsoft access database.
I am able to retrieve officenames, sort and display the contents in datagridview
Click to watch the output of datagrid view on the left
But the problem is my excel file contains both strings and numbers in its sheet.
Excel file screenshot 1
Excel file screen shot 2
As you can see even though the excel file contains numbers, the datagridview on the right doesn't display excel cells with number values. Please watch the gridview on the right in the first image for the reference.
The code i am using is:
using (OleDbConnection con = new OleDbConnection(conStr))
{
using (OleDbCommand cmd = new OleDbCommand())
{
using (OleDbDataAdapter oda = new OleDbDataAdapter())
{
System.Data.DataTable dt = new System.Data.DataTable();
cmd.CommandText = "SELECT * From [" + sheetName + "]";
//new code to displayi contents to temp datagrid
System.Data.OleDb.OleDbConnection MyConnection;
System.Data.DataSet DtSet;
System.Data.OleDb.OleDbDataAdapter MyCommand;
MyConnection = new System.Data.OleDb.OleDbConnection(#"provider=Microsoft.Jet.OLEDB.4.0;Data Source='C:\Users\acer\Documents\Visual Studio 2012\Projects\SBCO consolidation Reporter\SBCO consolidation Reporter\Files\RD1.xls';Extended Properties=Excel 8.0;");
MyCommand = new System.Data.OleDb.OleDbDataAdapter("SELECT * From [" + sheetName + "]", MyConnection);
MyCommand.TableMappings.Add("Table", "Net-informations.com");
DtSet = new System.Data.DataSet();
MyCommand.Fill(DtSet);
dataGridView2.DataSource = DtSet.Tables[0];
MyConnection.Close();
//new code end
cmd.Connection = con;
con.Open();
oda.SelectCommand = cmd;
oda.Fill(dt);
con.Close();
//Populate DataGridView.
System.Data.DataTable tempDT = new System.Data.DataTable();
tempDT = dt.DefaultView.ToTable(true, "F2");
foreach (DataRow row in tempDT.AsEnumerable().Take(7).ToList())
{
row.Delete();
}
int count = tempDT.Rows.Count;
tempDT.Rows[count - 1].Delete();
tempDT.Rows[count - 2].Delete();
tempDT.Rows[count - 4].Delete();
DataView dv = tempDT.DefaultView;
dv.Sort = "F2 asc";
System.Data.DataTable sortedDT = dv.ToTable();
sortedDT.Columns[0].ColumnName = "Office Name";
//sortedDT.Columns[1].ColumnName = "Finacle Dep";
sortedDT.Columns.Add("Profit Center Code", typeof(System.Int32));
sortedDT.Columns.Add("Finacle Dep", typeof(System.Int32));
sortedDT.Columns.Add("Finacle Withdrawal", typeof(System.Int32));
tempDT.AcceptChanges();
dataGridView1.DataSource = sortedDT;
dataGridView1.Columns["Office Name"].ReadOnly = true;
con.Close();
}
}
}
So where am i doing it wrong. Please help!

Reading Excel File using C#

I am new to C# and I am trying to read an excel file with the following code
string conStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelFilePath +
";Extended Properties=Excel 12.0;";
using (OleDbConnection connection = new OleDbConnection(conStr))
{
connection.Open();
OleDbCommand command = new OleDbCommand("select * from [Sheet1$]", connection);
using (OleDbDataReader dr = command.ExecuteReader())
{
while (dr.Read())
{
var row1Col0 = dr[0];
Console.WriteLine(row1Col0);
}
}
}
I get the following error:
Sheet1$' is not a valid name. Make sure that it does not include invalid characters or punctuation and that it is not too long.
Can anyone tell me whats I am doing wrong?
The name of excel sheet is sheet.xlsx
Thanks

The sheet name might not be the same as the filename, you can get the first sheet name by doing the following
First, get the schema
DataTable dtSchema = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
Then get the first sheets name
var sheetName = dtSchema.Rows[0]["TABLE_NAME"].ToString();
After you get your command, you can then fill a dataset and work with it's .Rows collection
var myDataSet = new DataSet();
command.Fill(myDataSet);
The sheetname is this

How to choose a value from cell in Excel

How can I choose correctly value from cell in Excel? I know that my problem is with command for select cell.
My actually scripts:
List<string> wsList = new List<string>();
DataTable schemaTable;
DataSet da = new DataSet();
OleDbDataAdapter adapter = new OleDbDataAdapter();
string name;
string FileName = fullpath;
string _ConnectionString = string.Empty;
string _Extension = Path.GetExtension(FileName);
// Checking for the extentions, if XLS connect using Jet OleDB
if (_Extension.Equals(".xls", StringComparison.CurrentCultureIgnoreCase))
{
_ConnectionString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0};Extended Properties=Excel 8.0", FileName);
}
// Use ACE OleDb
else if (_Extension.Equals(".xlsx", StringComparison.CurrentCultureIgnoreCase))
{
_ConnectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 8.0", FileName);
}
OleDbConnection con = new OleDbConnection(_ConnectionString);
try
{
con.Open();
// Get schematable name from excel file
schemaTable = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
foreach (DataRow row in schemaTable.Rows)
wsList.Add(row.Field<string>("TABLE_NAME"));
name = wsList[0];
// Select values from cell in excel
string strCmd = "SELECT J38 FROM [" + name + "]"; // I think that here is my main problem
// Command for select value
OleDbCommand cmd = new OleDbCommand(strCmd, con);
da.Clear();
adapter.SelectCommand = cmd;
adapter.Fill(da);
UniqueValue.money.Add(double.Parse(da.ToString()));
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
finally
{
con.Close();
}
Image where you can watch what I need select: (Merged-Cell)
Debug:
For one or more required parameters were not found, no value

Merged cells and data adapters don't mix. If this is a one-off, copy the values from the original worksheet into an empty workbook and unmerge the cells, do any other cleanup manually. If this is a production process that needs to be repeated, and is high-volume, consider writing a VBA macro in the workbook to do the copypasta/cleanup process for you.

Import data from an Excel sheet into a SQL Server database

How to import the data from an Excel sheet into SQL Server database in asp net?
Dim OleDbcon As New OleDbConnection((Convert.ToString("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=") & path) + ";Extended Properties=Excel 12.0;")
Dim cmd As New OleDbCommand("SELECT * FROM [Sheet1$]", OleDbcon)
Dim objAdapter1 As New OleDbDataAdapter(cmd)
OleDbcon.Open()
Dim dr As DbDataReader = cmd.ExecuteReader()
Dim con_str As String = "Data Source=.;Initial Catalog=studentdetails;Integrated Security=True"
' Bulk Copy to SQL Server
Dim bulkInsert As New SqlBulkCopy(con_str)
bulkInsert.DestinationTableName = "Table name"
bulkInsert.WriteToServer(dr)
OleDbcon.Close()e here

Break this down into two steps:
1) Save the file somewhere - it's very common to see this:
string saveFolder = #"C:\temp\uploads"; //Pick a folder on your machine to store the uploaded files
string filePath = Path.Combine(saveFolder, FileUpload1.FileName);
FileUpload1.SaveAs(filePath);
Now you have your file locally and the real work can be done.
2) Get the data from the file. Your code should work as is but you can simply write your connection string this way:
string excelConnString = String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties="Excel 12.0";", filePath);
You can then think about deleting the file you've just uploaded and imported.
To provide a more concrete example, we can refactor your code into two methods:
private void SaveFileToDatabase(string filePath)
{
String strConnection = "Data Source=.\\SQLEXPRESS;AttachDbFilename='C:\\Users\\Hemant\\documents\\visual studio 2010\\Projects\\CRMdata\\CRMdata\\App_Data\\Database1.mdf';Integrated Security=True;User Instance=True";
String excelConnString = String.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0\"", filePath);
//Create Connection to Excel work book
using (OleDbConnection excelConnection = new OleDbConnection(excelConnString))
{
//Create OleDbCommand to fetch data from Excel
using (OleDbCommand cmd = new OleDbCommand("Select [ID],[Name],[Designation] from [Sheet1$]", excelConnection))
{
excelConnection.Open();
using (OleDbDataReader dReader = cmd.ExecuteReader())
{
using(SqlBulkCopy sqlBulk = new SqlBulkCopy(strConnection))
{
//Give your Destination table name
sqlBulk.DestinationTableName = "Excel_table";
sqlBulk.WriteToServer(dReader);
}
}
}
}
}
private string GetLocalFilePath(string saveDirectory, FileUpload fileUploadControl)
{
string filePath = Path.Combine(saveDirectory, fileUploadControl.FileName);
fileUploadControl.SaveAs(filePath);
return filePath;
}
You could simply then call SaveFileToDatabase(GetLocalFilePath(#"C:\temp\uploads", FileUpload1));
Consider reviewing the other Extended Properties for your Excel connection string. They come in useful!
Other improvements you might want to make include putting your Sql Database connection string into config, and adding proper exception handling. Please consider this example for demonstration only!

we will create a method data table in which we will take excel sheet info in data table or data set after that we will push that data into SQL database table using SQL bulk
protected void Button1_Click(object sender, EventArgs e)
{
try
{
SqlConnection con = new SqlConnection(#"Data
Source=SANI2711\SQLEXPRESS;Initial Catalog=customer;Integrated
Security=True;");
con.Open();
DataTable dt = new DataTable();
dt = DataExcel();
if (dt.Rows.Count > 0)
{
for()
}
}
catch(Exception ex)
{
Response.Write(ex);
}
}
protected void Button2_Click(object sender, EventArgs e)
{
try
{
SqlConnection con = new SqlConnection(#"Data
Source=SANI2711\SQLEXPRESS;Initial Catalog=customer;Integrated
Security=True;");
con.Open();
DataTable dt = new DataTable();
dt = DataExcel();
if (dt.Rows.Count > 0)
{
SqlBulkCopy objbulk = new SqlBulkCopy(con);
objbulk.DestinationTableName = "customer1";
objbulk.ColumnMappings.Add("CustomerID", "CustomerID");
objbulk.ColumnMappings.Add("City", "City");
objbulk.ColumnMappings.Add("Country", "Country");
objbulk.ColumnMappings.Add("PostalCode", "PostalCode");
objbulk.WriteToServer(dt);
}
}
catch (Exception ex)
{
Response.Write(ex);
}
}
protected DataTable DataExcel()
{
DataTable dt = new System.Data.DataTable();
try
{
string filenname=#"C:\Users\sani singh\Documents\Excel03.xls";
string sWorkbook = "[Sheet1$]";
string ExcelConnectionString=#"Provider=Microsoft.Jet.OLEDB.4.0;Data
Source="+filenname+";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1'";
OleDbConnection OleDbConn = new OleDbConnection(ExcelConnectionString);
OleDbConn.Open();
OleDbCommand OleDbCmd = new OleDbCommand(("SELECT * FROM " + sWorkbook),
OleDbConn);
DataSet ds = new DataSet();
OleDbDataAdapter sda = new OleDbDataAdapter(OleDbCmd);
sda.Fill(ds);
dt = ds.Tables[0];
OleDbConn.Close();
}
catch(Exception ex)
{
Response.Write(ex);
}
return dt;
}
}
}

Add a DataTable which can hold the Excel data generated via OLEDb.
string excelconnectionstring = String.Format(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelfilepath + ";Excel 12.0 Xml;HDR=YES;IMEX=1;TypeGuessRows=0;ImportMixedTypes=Text;Jet OLEDB:Max Buffer Size=256;");
using (OleDbConnection oledbconn = new OleDbConnection(excelconnectionstring))
{
using (OleDbCommand oledbcmd = new OleDbCommand(myexceldataquery, oledbconn))
{
oledbconn.Open();
OleDbDataReader dr = oledbcmd.ExecuteReader();
dtBulkUpload.Load(dr);
}
}
Then serialize this DataTable to XML which can be sent to SQL Stored Proc. This approach is very useful if there are too many fields and you can send all in a single parameter
using (StringWriter strXML = new StringWriter())
{
dtBulkUpload.TableName = "BulkUpload";
dtBulkUpload.WriteXml(strXML, XmlWriteMode.IgnoreSchema, false);
xmlString = strXML.ToString();
}
using (SqlCommand cmd = new SqlCommand("Stored PROC Name"))
{
cmd.Parameters.AddWithValue("#dtBulkUpload", bulkUploadData);
//SqlParameter returnParameter = cmd.Parameters.Add("#result", SqlDbType.NVarChar);
//returnParameter.Direction = ParameterDirection.Output;
cmd.Parameters.Add("#result", SqlDbType.NVarChar,3000);
cmd.Parameters["#result"].Direction = ParameterDirection.Output;
cmd.Connection = con;
cmd.CommandType = CommandType.StoredProcedure;
con.Open();
cmd.ExecuteNonQuery();
query = (string)(cmd.Parameters["#result"].Value.ToString());
con.Close();

Unable to read Excel worksheet with OLEDB driver

I have an excel file with one worksheet. I'm using MicroSoft.Office.Interop.Excel to read this file and then perform further execution.
Here is my code:
connString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + strNewPath + ";Extended Properties=Excel 8.0;";
conn = new OleDbConnection(connString);
if (conn.State == ConnectionState.Closed)
conn.Open();
System.Data.DataTable dt = null;
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
But, worksheet is not in the data table object.

Where you have mentioned the table(WorkSheet) name ??
DataTable schemaTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,
new object[] {null, null, null, "TABLE"});
//Get the First Sheet Name
string firstSheetName = schemaTable.Rows[0][2].ToString();
//Query String
string sql = string.Format("SELECT * FROM [{0}],firstSheetName);
Refer here MSDN
In case if you want to play around refer Reading Excel files from C#

OleDbConnection oconn = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + "; Extended Properties=Excel 12.0;");
//After connecting to the Excel sheet here we are selecting the data
//using select statement from the Excel sheet
oconn.Open();
DataTable dbSchema = oconn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dbSchema == null || dbSchema.Rows.Count < 1)
{
throw new Exception("Error: Could not determine the name of the first worksheet.");
}
string firstSheetName = dbSchema.Rows[0]["TABLE_NAME"].ToString();
string tbstrat = "M1000";
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = oconn;
cmd.CommandText = "select * from [" + firstSheetName + "B8:" + tbstrat + "]";
OleDbDataAdapter adap = new OleDbDataAdapter();
DataTable dt = new DataTable();
adap.SelectCommand = cmd;
adap.Fill(dt);
oconn.Close();

Even you can try this
var adapter = new OleDbDataAdapter("SELECT * FROM [workSheetNameHere$]", connectionString);
var ds = new DataSet();
adapter.Fill(ds, "NameHere");
DataTable data = ds.Tables["NameHere"];