I am making a windows application in C#.
I want to use the checkbox that comes in windows 7 control panel program feature.
If the subcheckboxes of the tree are all not selected then the parent checkbox should be filled
If all subitems are selected then the parent checkbox should be checked
If all subitems are unselected then the parent checkbox should be unselected.
I am using separate checkboxes (like checkboxImageList, found in google), not a treeview checkbox.
Well, a treeview checkbox would save you a lot of hassle here, because you can just use LINQ to check or uncheck all nodes when a node is clicked by handling the Click event (let's say clickedItem is the node that was clicked:
foreach (TreeNode node in clickedItem.Nodes.ToList())
{
node.IsSelected = clickedItem.IsSelected;
}
Also, from a user interface point of view, the TreeView makes sense. If you absolutely insist on using individual checkboxes, then you just build a tree of CheckBox items in memory, perhaps using something like this sample Tree<T> data type, and then when you click on a checkbox, just recursively travel through the tree until you've checked every box under that one.
But consider what will happen with your app. You might have so many options in the future that you'll need a way to programatically add them. You might need scrolling. You might need to make the entire thing configurable. And once you've added all that, you'll just have re-implemented TreeView.
Maybe you should better use a TreeView. Here's an example of a TreeView managing alone the mid-check state.
Related
I am working on a windows form application, where I connect to the database and get a list of projects and sub-projects. I am able to show this as a treeview with checkboxes, that later an user can select to do further operations.
My problem is that, I can't set the Parent node state when one of the child nodes is selected. Here, I want some indication, if any of the child nodes is selected the parent node should fill in to show that something has been selected below that parent node.
Okay, meanwhile, I found answer to my problem. Not really wise but thanks to this Simple Tri-State TreeView control. code link here.
I will definitely try to build my own custom version of this. For now, this works fine.
I am re-designing some GUI items and want to implement something like the following:
As you change options in the TreeView on the left, the controls on the right change according to the option selected.
My question is, what is the best way to implement this? I was thinking of setting the visible property to true / false for each control to it's respective TreeView option selection; however, designing this on the VS GUI editor would be pretty painful as there would be hundreds of controls all over the place and on top of each other.
User controls. Create the blocks you have outlined in red as user controls and add/remove as you select/change node in the treeview.
If you want a "buffer" effect to avoid flicker when removing an existing control, then use a tab control with two pages (without showing the tabs.) Start with showing TAB1 then when selecting a node in the treeview add the correct control to TAB2 and then make TAB2 the active page. And then remove any existing controls from TAB1. And then the other way around when the next node is selected. etc etc.
I'm new to the "Telerik"-controls and I have a few questions! First of all, I'll give you a small resume of what we want to achieve and how I did it for now.
The customers has several clients who come to present themselves and they need to fill in their qualities (language skills, education, ....). Therefor we've created some templates (that already contains some crucial data). The templates can be hierarchical => Language Skill Dutch has two children : "Writing", "Speaking". They see that in an Hiearchical treeview (for now).
If they select the item in that tree, they automatically create a quality (with the templateid, contactid, etc...) for that type of template. Each time they call the treeview for that contact, the template who has a quality will be checked! And if they click on "Edit", they'll be able chaging some info of the quality.
That's in short what it does now and what's behind it. Now, they wanted a nicer looking method without having popups and such (everything in one screen). Then i found the "RadTreeList" of telerik. But for now I'm having the following problems :
The root of the tree can't be selected (best would be that the checkbox is hidden) => how do I achieve this?
Is it possible to hide the "EDIT"-button on the root? The root should never be selected on his own (no qualities for root elements).
So the big question, how can I take an item while looping through the whole treelist collection and say that I don't want to show checkbox and such?
With my treeview I iterated through all the nodes and then I did the needed modifications. But 1 => It was slow, 2 => It looked that nice, 3 => It didn't match they look of the CRM 2011.
What i've already achieved is showing everything hiearchical and select the "Node-Templates" (if I can call it so) that contains Qualities.
Hopefully you have enough info... If there are better alternatives, I'm open for everything, but it's kind off urgent, cause we'll have a demo-session soon :)
Info => It has to be in ASP.NET (C#)
It is true that you cannot select the 'root' of the treelist, but you can place an item in the first column to add new items at root level as illustrated here: http://demos.telerik.com/aspnet-ajax/treelist/examples/dataediting/net35automaticdataediting/defaultcs.aspx.
To hide the edit button for root level items, listen to the ItemCreated event, locate the edit button in the root items only and set its Visible property to false. This should work for checkboxes or other server controls inside the treelist rows and you do not have to perform explicit loops through the items later on.
i want to add the check box to the child node of a certain parent node in the tree view in my application...How should i add it?
TreeView has a property with the name CheckBoxes, if set to true, it shows checkboxes for all child nodes.
The TreeView API only allows you to add/remove checkboxes for EVERY node. If that's what you want, then the answer is easy - use the TreeView's CheckBoxes property.
If you want a checkbox for a particular node in the tree only, then it gets tricky. .NET doesn't directly support that. You can get the tree to accept it using Win32 message overrides, see the link below for a solution elsewhere:
http://dotnetfollower.com/wordpress/2011/05/winforms-treeview-hide-checkbox-of-treenode/
You can't show checkboxes only for some TreeNodes - only for all of them or none at all.
To enable the checkboxes for your tree set the CheckBoxes property to true.
I am using the standard asp.net treeview control to display a menu structure that is getting bound from a database. The data structure has a parentID column to represent the node relationship if one exists.
Anyway, that's not an issue, I am looking for a treeview control that would allow a user to rearrange the node by dragging them to a new position within the tree. Can anyone point me in the right direction as to any controls out there that can do this? The windows form control has the move node events. IS there something like this for web forms? Any pointers greatly appreciated.
You can have look at ExtJS TreePanel.
Drag and Drop ordering in a TreePanel
Why not try the JQuery TreeView plug-in?
http://plugins.jquery.com/project/treeview
Not sure if meets all of your non-functional requirements, but if you click on the "Try out a demonstration" link, you should be able to see if it meets your needs.