How to add a tree structure dynamically?

Question

Hi I want a add a tree structure to be added dynamically which would basically look like a menu structure where in i can have n number of menu's which can have n number of sub menu's which in turn may have n number sub menu's and so on. I should also be able to delete the nodes as well? Can anyone tell me how to do this? Earliest response would be greatful

Sam Hobbs · Answer

What is your understanding of what your data will look like?

Karthik Agarwal · Answer

If you ask me what's my data in particular it's nothing but strings which the user give for treeview. I want to store the name of the treeview which the user gives for root all child and it's siblings that's it

Sam Hobbs · Answer

That does not answer the question.

Karthik Agarwal · Answer

My application is a windows form where in i will design my tree view structure first of all for which i have already written coding and when the user selects to save the project then i should be able to save the treeview structure the user has created into a project which i am planning as xml and my doubt is how to write to an xml file and where should i be able to reopen the xml as the project again and reload the treeview structure again

Karthik Agarwal · Answer

Sam i didn't ask you to write in the whole code but instead i asked you to suggest me in the coding point of you rather kidding. Of course i am ready to put in my efforts to work on that. so what's the next step?

Sam Hobbs · Answer

Then you can wait for Vulpes or someone that will do it all for you. If you want to make an effort to do it yourself then I will help but I won't do it all for you. I have provided code for you in the past right?

Karthik Agarwal · Answer

Yup i understood that but i need something in the implementation point of view. which would make things simple for me. I also need to know how to traverse through the tree as well. I need something in the coding point of view. Little more deep into how to write to xml file where i want to use that as project file by writing the details about the treeview into xml file and reading it back

Sam Hobbs · Answer

Yes we can keep it in this thread. I prefer to clarify questions when there are questions about the question and I wanted to expedite the clarification process if possible. The typical way to store a hierarchical structure is to have an identity column for each item and each item also has the identity of its parent. The very top item has no parent so the identity of its parent is something that indicates there is no parent. So for example an employee that is not a manager of any type would have as their parent the supervisor. Each supervisor would have as their parent their manager. The company president would have no parent. In a filesystem the root directory has no parent. Every other directory (subdirectory) would have as its parent the directory that the subdirectory is in. Does that help? Do you need more details?

Karthik Agarwal · Answer

Showing the data is already done and i just need support for storing the data that's it. Actually i am planning have a project kind of thing where in i can store in the data and can reopen the project file may be an xml will do the job. I just want to know how to store the dynamically created data into an project file. So there is only one thread in here hence i think it doesn't require any other post.

Sam Hobbs · Answer

I think there are two parts to the requirement and they are quite independent of each other. Part of the requirement is how to store the data; is that what you are asking about? The otehr part is how to show the data. A TreeView is typically used for that. If you need something that the TreeView cannot do then you need to explain that better. If you need help with both of those parts then it would be better to create a separate thread for each one since they are so independent of each other.

Karthik Agarwal · Answer

Thanks for your reply but i want to write an independent code irrespective of what kind of the menu user is gonna make so it would be good if it is through some context menu or something else rather hard coding it.

Krishna Garad · Answer

you can try like this //Create Treenode control TreeView trcontrol=new TreeView(); //Create Head Node TreeNode headnode1=new TreeNode(); headnode1.Text=First Head; TreeNode headnode2=new TreeNode(); headnode2.Text=Second Head; //Add Head Node to Treeview trcontrol.Nodes.Add(headnode1); trcontrol.Nodes.Add(headnode2); //Create Child Node TreeNode child1=new TreeNode(); child.Text=Child1; //Add Child Node to First Head Node headnode1.ChildNodes.Add(child1); //Create subhild TreeNode subchild=new TreeNode() subChild.Text=Child Of Child; child1.ChildNodes.Add(subchild); like this by adding head node in that you can add no of childs as well as no of subchilds.