How to import data from an excel sheet and display it on a datagrid in a windows form

Beautifull tutorial!
+5!

Hi all
Below is the code that I researched and it is working fine. But when I went through it, when you are uploading an excel file the code restricts the sheet name to be "Sheet1" on this line "string query = string.Format("select * from [{0}$]", "Sheet1");". How can I tweek the application to actually accept any sheetname and display. Code is below:

private void btnbrowse_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
DialogResult dlgresult = dlg.ShowDialog();

if (dlgresult == DialogResult.OK)
{
txtpath.Text = dlg.FileName;
}

}


private void btnload_Click(object sender, EventArgs e)
{
if (System.IO.File.Exists(txtpath.Text))
{
try
{
string connectionString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 8.0;HDR=YES;IMEX=1;""", txtpath.Text);

string query = string.Format("select * from [{0}$]", "Sheet1");
OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, connectionString);
DataSet dataset = new DataSet();
dataAdapter.Fill(dataset);
dgrvInfo.DataSource = dataset.Tables[0];


}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Fail", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}

else
{
MessageBox.Show("Please select a file!", "Fail", MessageBoxButtons.OK, MessageBoxIcon.Error);

}

}



}