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string connectionString ="Provider=Microsoft.Jet.OleDb.4.0; Data Source=D:\MySamplefile.xls;Extended Properties=Excel 8.0;"using(OleDbConnection Connection =new OleDbConnection(connectionString))

{

Connection.Open()

using(OleDbCommand command =new OleDbCommand())

{

command.Connection = Connection;

command.CommandText = "CREATE TABLE[EmpTable$](EmpFirstName Char(100), EmpLastName char(100), EmpDeptchar(250))";

command.ExecuteNonQuery();

}

//Add values to the table (EMPTable) in the Worksheet

using(OleDbCommand command =new OleDbCommand())

{

command.Connection = Connection;

command.CommandText = "INSERT INTO TABLE[EmpTable$](EmpFirstName ,EmpLastName ,EmpDept )VALUES('Karthik','Anbu','karthik.Anbu@xyz.com')";

command.ExecuteNonQuery();

command.CommandText = "INSERT INTO TABLE[EmpTable$](EmpFirstName ,EmpLastName ,EmpDept )VALUES('Arun','Kumar','Arun.Kumar@xyz.com')";

command.ExecuteNonQuery();

}

Code : Reading data from Excel sheetDataTable dt;

string connectionString ="Provider=Microsoft.Jet.OleDb.4.0; Data Source=D:\MySamplefile.xls;Extended Properties=Excel 8.0;"using(OleDbConnection Connection =new OleDbConnection(connectionString))

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{

Connection.Open()

using(OleDbCommand command =new OleDbCommand())

{

command.Connection = Connection;

command.CommandText = "SELECT * FROM[EmpTable]";

using(OleDbDataAdapter adapter =new OleDbDataAdapter()){adapter.SelectCommand = command;adapter.Fill(dt);}}}

Conclusion:

So in this article we have seen how to do a small manipulation of reading and writing Excel data using C# which we normally require in our day-to-day coding.

-----------------------------------------------------------------------public static void ExcelExport(DataTable data, String fileName, bool openAfter){ //export a DataTable to Excel DialogResult retry = DialogResult.Retry;

while (retry == DialogResult.Retry)

{ try { using (ExcelWriter writer = new ExcelWriter(fileName)) { writer.WriteStartDocument();

// Write the worksheet contents writer.WriteStartWorksheet("Sheet1");

//Write header row writer.WriteStartRow(); foreach (DataColumn col in data.Columns)

writer.WriteExcelUnstyledCell(col.Caption); writer.WriteEndRow();

//write data foreach (DataRow row in data.Rows) { writer.WriteStartRow(); foreach (object o in row.ItemArray) { writer.WriteExcelAutoStyledCell(o);

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} writer.WriteEndRow(); }

// Close up the document writer.WriteEndWorksheet(); writer.WriteEndDocument(); writer.Close(); if (openAfter) OpenFile(fileName); retry = DialogResult.Cancel; } } catch (Exception myException) { retry = MessageBox.Show(myException.Message, "Excel Export", MessageBoxButtons.RetryCancel, MessageBoxIcon.Asterisk); } }}