how to get values in datatable based on values in array

Question

i have two id in array and take two row values based on array and print in grid view

 

and my code is

 

int[] iid = RawMaterialStock.temparray;


if(iid.Length>0)
{
for (int i = 0; i < iid.Length;i++ )
{
purchaseBAL.productId = iid[i];
DataTable dt = purchaseDAL.gerproductdetail(purchaseBAL);
dgvPurchaseProducts.AutoGenerateColumns = false;
dgvPurchaseProducts.DataSource = dt;

 

i am getting only one row 

insted of two