DataTable dt; 

DataView dv = new DataView(dt);
dv.Sort = "EmpID Asc";
dt= dv.toTable(); 

//Bind the data table to DataGridView
DataGridView1.DataSource = dt;
DataGridView1.Refresh();

private static void SortDataTable(DataTable dt, string sortCol) 
{ 
//Take a Clone of the DataTable

DataTable newDT = dt.Clone(); 
int rowCount = dt.Rows.Count;  //Rows Count


//Using Select Method to sort the Rows
DataRow[] SortedRows = dt.Select(null, sortCol); // Sort with Column name 
for (int i = 0 ; i < rowCount; i++) 
{ 
   object[] arr = new object[dt.Columns.Count]; 
   for (int j = 0; j < dt.Columns.Count; j++) 
   { 
     arr[j]=SortedRows[i][j]; 
} 

//Add the Sorted Row 
DataRow data_row = newDT.NewRow(); 
data_row.ItemArray=arr; 
newDT.Rows.Add(data_row); 
} 

//clear the incoming 
dt.Rows.Clear(); 

for(int i = 0; i < newDT.Rows.Count; i++) 
{ 
object[] arr = new object[dt.Columns.Count]; 
for (int j = 0; j < dt.Columns.Count; j++) 
{ 
arr[j]=newDT.Rows[i][j]; 
} 

DataRow data_row = dt.NewRow(); 
data_row.ItemArray = arr; 
dt.Rows.Add(data_row); 
} 

dt.AcceptChanges();

//Bind the Sorted Table to DataGridView

DataGridView1.DataSource = dt;
DataGridView1.Refresh();

}