Drag and drop a treeview control to main monitors and then move it to second monitor. In the mean time, the workaround is to use the TreeView’s SelectedNode property instead. Right click the project and select Properties -> Build ->Platform target, change Any CUP to x86. using System using using System.ComponentModel using System.Data using System.Drawing using System.Linq using System.Text using System.Windows.
#Winforms treeview free#
Indeed how would one change ImageSize of a node So I had 15 free minutes and this is what I found. I googled up this problem and I found that this bug was reported on Connect, and it will be fixed in the next version. Hi, Today I visited and saw a question about Treeview. Apparently, during the expand, if there are more child nodes that fit on the screen, the parent node scrolls to the top, but the cursor stays in the same place where the double click occurred.
Notice where the cursor is – that’s the node that was passed in the event handler. And that helped me realize that the e.Node is actually the node that is currently under the mouse cursor!ĭouble clicking on Fonts makes the following happen: I placed a MessageBox.Show(e.Node.Text) in the NodeMouseDoubleClick handler. Each node in the tree view might contain other nodes, called child nodes.
#Winforms treeview code#
Create a new class file called TreeViewRenderer.cs and paste the code below into. With the Windows Forms TreeView control, you can display a hierarchy of nodes to users, like the way files and folders are displayed in the left pane of the Windows Explorer feature of the Windows operating system. I made a small WinForms application with just a TreeView, and I filled it with the contents of my C:\Windows directory. The C class below fills a WinForms TreeView at runtime using a DataTable. I noticed that it was not the same node all the time – it was different.
Since the sub-child nodes count was 0, the event handled the (incorrect) node. To my surprise, I discovered today that by double clicking on a collapsed parent node, the e.Node parameter was not the node I actually double clicked on, but one of the child nodes. Most of the time when we need something to happen when a child node is double clicked, but not the parent, we write something similar to: void NodeMouseDoubleClick( object sender, TreeNodeMouseClickEventArgs e) Usually, double clicking on a collapsed tree node (which obviously has child nodes) will expand it. Here’s a strange bug I’ve encountered today in a WinForms application.
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