Question

I’ve table in database ItemList that hold ProdutID with ItemID.

ProductID    ItemID
  AAA         1001
  AAA         1002
  AAA         1003
  BBB         1201
  BBB         1293
  CCC         1040
  DDD         2011
  DDD         3203

I want add all those data to Treeview Like this:

+AAA
 - 1001
 - 1002
 - 1003
+BBB
 - 1201
 - 1293
+CCC
 - 1040
+DDD
 - 2011
 - 3203

please teach me how to do this. Thanks.

edit :

i try to add each item into ArrayList with length 2 data (ProductID, ItemID)

   for(int i=0;i<arrayList.count;i++)
    {
       TreeNode treeNode = new TreeNode(((string[])arrayList[i])[0]);    
       treeview1.Nodes.Add(treeNode);
}

Answer 1

TreeGridNode nodeParent = treeGridView1.Nodes.Add("AAA");

TreeGridNode nodeChild = nodeParent.Nodes.Add("1001"); 
TreeGridNode nodeChild = nodeParent.Nodes.Add("1002"); 
TreeGridNode nodeChild = nodeParent.Nodes.Add("1003"); 

You would do this dynamically using two for loops

foreach (var product in Products)
{
  TreeGridNode nodeParent = treeGridView1.Nodes.Add(product.Id);
  foreach (var item in product.Items)
  {
   TreeGridNode nodeChild = nodeParent.Nodes.Add(item.Id); 
  }

}