Clone DataTable or Copy DataTable Problem

[Kelvin]

Hi All,

Due to can't insert new row between row and row while current
DataTable looping.
In order to solve the problem, I need to clone it as new DataTable,
while the DataTable Looping, it also insert both of new row and
existing datarow into new DataTable, but I don't know how to do that,
Here is my souce code, Please advise.

if ( myTable.Rows.Co unt > 0 )
{
msg.Text = "";

y = myTable.Rows.Co unt;

for (i=0; y > i ; i++ )
{

DataRow dataRow = myTable.Rows[i];

if ((Convert.ToStr ing(myOrderNo) == "") ||
(Convert.ToStri ng(myOrderNo) == null))
{
myOrderNo = Convert.ToStrin g(dataRow["OrderNo"]);
}

if (myOrderNo != Convert.ToStrin g(dataRow["OrderNo"]))
{
// DataRowCollecti on rc = myTable.Rows;
mySubTotal = Convert.ToDoubl e(myTotalPrice) - (
Convert.ToDoubl e(myTotalPrice) *
Convert.ToInt16 (dataRow["HeadDiscou nt"]) /100 );

dr1 = myTable.NewRow( );
dr1["OrderNo"] = myOrderNo;
dr1["TotalPrice "] = Convert.ToDoubl e(mySubTotal);

// myTable.Rows.Ad d(dr1);
myTable.Rows.In sertAt(dr1,i);
myTable.AcceptC hanges();

myGrandTotal = Convert.ToDoubl e(myGrandTotal) +
Convert.ToDoubl e(mySubTotal);
myOrderNo = Convert.ToStrin g(dataRow["OrderNo"]);

myTotalPrice = 0;
}
myTotalPrice = myTotalPrice +
Convert.ToDoubl e(dataRow["TotalPrice "]);

// Add Last Record
if (y == i + 1)
{
DataRowCollecti on rc = myTable.Rows;
mySubTotal = Convert.ToDoubl e(myTotalPrice) - (
Convert.ToDoubl e(myTotalPrice) *
Convert.ToInt16 (dataRow["HeadDiscou nt"]) /100 );

dr1 = myTable.NewRow( );
dr1["OrderNo"] = myOrderNo;
dr1["TotalPrice "] = Convert.ToDoubl e(mySubTotal);

//myTable.Rows.Ad d(dr1);
myTable.Rows.In sertAt(dr1,i);
myTable.AcceptC hanges();

myGrandTotal = Convert.ToDoubl e(myGrandTotal) +
Convert.ToDoubl e(mySubTotal);
}

}