C# tree file

Connect and share knowledge within a single location that is structured and easy to search. I have been looking for a C tree control for displaying a file system that has the following capabilities:. I have been looking at this C File Browser. Unfortunately, I have not been able to figure out how to do meet my second need.

If anybody can clear that up for me, I would like that even better. Thanks for any help. You could try adding ItemActivate event on the fileView control under Browser User Control of the FileBrowser project and get the selected item s when handling it. ItemActivate event is triggered on every double click of an item. Here is the sample code:. Edit by Original Question Writer: To see all of the source, look at the code posted by cipriansteclaru in the comments section of the FileBrowser.

You have to actually edit the FileBrowser source to gain this functionality which is what this answer was demonstrating. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. IO and System. Text namespaces. C tutorial is a comprehensive tutorial on C language.

The File class of the System. IO provides static methods for the creation, copying, deletion, moving, and opening of a single file. It also helps in the creation of FileStream objects.

The File. We get the bytes of the three words we are going to write with Encoding. CreateText creates or opens a file for writing UTF-8 encoded text. If the file already exists, its contents are overwritten. The example creates a new file with File. It writes three words with WriteLine. It takes the source file and the destination file as parameters. Move moves a specified file to a new location. ParameterExpression , MethodCallExpression , and the other expression-specific types are also defined in the System.

These types derive from the abstract type Expression. NET Framework 4 or later, the expression trees API also supports assignments and control flow expressions such as loops, conditional blocks, and try-catch blocks.

By using the API, you can create expression trees that are more complex than those that can be created from lambda expressions by the C compiler. The following example demonstrates how to create an expression tree that calculates the factorial of a number. Expression trees should be immutable. This means that if you want to modify an expression tree, you must construct a new expression tree by copying the existing one and replacing nodes in it.

You can use an expression tree visitor to traverse the existing expression tree. In the latter, we could create the null-root. Building the tree could then become a recursive action. I am using a list, in order to remove the visited nodes from the ones that still need to be visited. This method is okay, other than the fact you're null checking an int and it should just be 0 for a root node. Not all versions of C support nullable types and int nullable types are usually frowned upon.

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Asked 4 years, 7 months ago. Active 1 year ago. Viewed 39k times. Improve this question. SNag SNag 1 1 gold badge 2 2 silver badges 5 5 bronze badges. ID's are used for identification between objects, but you can have multiple null ID's how are you going to differentiate those?

I've updated TreeNode and changed the type of id from int? For instance, when id is , it can be both the 11th child of node 2 and the 1st child of node In other words, does the id matter to specify the unique location of a node in the forest?

What is the purpose of id in TreeNode? Add a comment. Active Oldest Votes. I would like to encourage you to always use them. Using recursion to tackle this problem is a good idea.