How can i get access to a tree view which is placed in a tab contol in c#

Question

how can i get access to a tree view ,which is placed in a tab contol
i used

treeView1.TopNode.Text=filename;

for setting the top node name. but it always shows an error like

"Object reference not set to an instance of an object"

can anyone help me

score 0 · Accepted Answer · answered Apr 01 '14 at 10:07

0

Initialize it with treeView1 = new TreeView() and then add elements - you are tyring to set a text of a non-existing element.

answered Apr 01 '14 at 10:07

nxu

I did what you said. But still, it is not working I am adding treeview1 at the design time. At that time itself I am setting the root – user3456534 Apr 01 '14 at 10:15
Check in the debugger if the TopNode is really set. – nxu Apr 01 '14 at 11:02

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