Treeview.Nodes.Cast Not working

Question

TreeNode tnKey = 
    treeViewFilters
    .Nodes
    .Cast<TreeNode>()
    .Where(r => r.Text == FilterName)
    .ToArray()[0];

The above code is not working. It reports an error

Error   1   Instance argument: cannot convert from 'System.Windows.Forms.TreeNodeCollection' to 'System.Data.EnumerableRowCollection'   

Error   2   'System.Windows.Forms.TreeNodeCollection' does not contain a definition for 'Cast' and the best extension method overload 'System.Data.EnumerableRowCollectionExtensions.Cast<TResult>(System.Data.EnumerableRowCollection)' has some invalid arguments

I have taken code from Is there a method for searching for TreeNode.Text field in TreeView.Nodes collection? Any ideas?

This works fine in linqpad for me (replacing `treeViewFilters` with `new TreeView()`) and `ToArray()[0]` with `FirstOrDefault()`. — DaveShaw, Jul 26 '13 at 14:12

score 1 · Accepted Answer · answered Jul 26 '13 at 14:14

1

Sorry my mistake, i forget to add 'system.linq' name space

answered Jul 26 '13 at 14:14

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Mark this answer of yours as answer. – Nikhil Agrawal Jul 26 '13 at 14:46

Treeview.Nodes.Cast Not working

1 Answers1