Problem with Treeview

[rockyl]

Hi, I am using a treeview control to show image on each node depending on a particular variable's value (green if it is set and red if not. Bydefault red) When I am setting the variable for a particular node then the node's image is changed to green(required behavior). But when I click on a node which has green image, the node's image is automatically changing to red and again changing back to green after changing the node selection. Please help me in solving this problem. Thanks: Rakesh

Rakesh

[originSH]

Check out the SelectedImageKey and ImageKey properties ... these control what image is set by default and when a node is selected. they should both be clear if you want to control it.

[rockyl]

I have set these values to null in the tvQuestionsList_NodeMouseClick eventhandler but the problem still persists :-(.

Rakesh

[Ed Poore]

Set them both to the same value.

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[rockyl]

That worked but one more problem has raised, when I select other node the previous node is again changing to red color from green. What could be the solution... Also can you suggest me any refference for this SelectedImage property like how it works and so. Thanks:

Rakesh

[Ed Poore]

TreeNode.SelectedImageKey[^] TreeNode.ImageKey[^]

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[rockyl]

I fixed it. Thanks...

Rakesh

[rockyl]

Hi Ed, Can you help me solving one more problem? I want to retain the back color of the selected node when I change the selection of the node through my form's next/previous buttons. To be clear when I am clicking on any node with mouse the backcolor is turning to blue(system generated). But when I am changing the selection the backcolor of the newly selected node is turning to white. I tried to modify the backcolor explicitly but I am not getting the same color as if system is giving by default. thanks in advance, Rakesh. Rakesh

Rakesh

[Ed Poore]

rockyl wrote:

but I am not getting the same color as if system is giving by default.

Are you using SystemColors.HighlightColor?

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[rockyl]

No I am not using this color. Will this solve my purpose?

Rakesh

[Ed Poore]

This colour changes automatically to reflect the highlight colour (used when the TreeView item is selected) defined by the user in the Display Properties of Windows.  So it is the same colour as the TreeViews selected node colour.

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[Ed Poore]

Can you post some code?

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[rockyl]

SystemColors.Highlight has solved my purpose. One more thing I am looking for is: I want to have some gap between each node of my tree. I have used indent property for this but there is no effect. Can you tell me way? Thanks in advance:

Rakesh

[Ed Poore]

Indent is the indentation from the left of the parent node, not the seperation between nodes, look for something like NodeHeight or a property with Height in it (excluding the ones relating to the control).  I think there is one.

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[rockyl]

HI Ed, Now I want to implement the key down event. Means when user clicks on down arrow I want next item to be diplayed and other wise if Up arrow. For this I am using the tv_KeyDown event and changing the item on the arrow clicked either Up or Down. But the problem is for the first click it is moving two nodes istead of one. And from then working fine. Please let me know your thoughts on this. Thanks:

Rakesh

[Ed Poore]

Can you post some code?  The only thing I can think of is if the TreeView doesn't have a node selected by default.

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[rockyl]

I am explicitly selecting the first node tv.SelectedNode = tv.Nodes[0]; and here is my code: private void tv_KeyDown(object sender, KeyEventArgs e) { if (e.KeyValue == 40) //code for down key only { if (currentItemCount > -1 ) { MyItem[currentItemCount].Visible = false; tv.Nodes[currentItemCount].BackColor = Color.White; currentItemCount+= 1; MyItem[currentItemCount].Visible = true; if (tv.SelectedNode != null) { tv.SelectedImageIndex = tv.Nodes[currentItemCount].ImageIndex; } } }

Rakesh