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Treeview in .Net Core Console Application

Prabs 1 Reputation point
2021-03-31T09:00:03.517+00:00

Hi,
How to create treeview in .Net Core console application dynamically

Developer technologies | .NET | .NET Runtime
Developer technologies | C#
Developer technologies | C#

An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.

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  1. Timon Yang-MSFT 9,611 Reputation points
    2021-04-01T08:19:19.347+00:00

    The treeview object has no meaning in console applications. Do you want to get tree-structured data in console applications?

    That doesn't need a treeview object, but a class like this: 

    class Node  
{  
    public string Name { get;  set; }  
    public List<Node> Children { get; set; }  
    public Node()   
    {  
        Children = new List<Node>();  
    }  
}

    You can use this class to store the tree structure and display it. 

        static Node Node = new Node();  
    static void Main(string[] args)  
    {  
        LoadDirectory(@"d:\test");  

        List<Node> nodes = Node.Children;  
        //......  
          
        Console.WriteLine("Press any key to continue...");  
        Console.ReadLine();  
    }  
    public static void LoadDirectory(string Dir)  
    {  
        DirectoryInfo di = new DirectoryInfo(Dir);  
        Node.Name = di.Name;  
        LoadFiles(Dir,  Node);  
        LoadSubDirectories(Dir,  Node);  
    }  
    private static void LoadSubDirectories(string dir,  Node node)  
    {  
        string[] subdirectoryEntries = Directory.GetDirectories(dir);  
        foreach (string subdirectory in subdirectoryEntries)  
        {  
            DirectoryInfo di = new DirectoryInfo(subdirectory);  
              
            Node node1 = new Node();  
            node1.Name = di.Name;  
            node.Children.Add(node1);  

            LoadFiles(subdirectory, node1);  
            LoadSubDirectories(subdirectory, node1);  
        }  
    }  
    private static void LoadFiles(string dir,  Node node)  
    {  
        string[] Files = Directory.GetFiles(dir, "*.*");  

        foreach (string file in Files)  
        {  
            FileInfo fi = new FileInfo(file);  

            Node node1 = new Node();  
            node1.Name = fi.Name;  
            node.Children.Add(node1);  
        }  
    }

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    1 person found this answer helpful.
  2. Viorel 126.9K Reputation points
    2021-04-01T08:55:17.367+00:00

    According to https://www.bing.com/search?q=add+reference+windows+forms+console+core and https://learn.microsoft.com/en-US/dotnet/core/project-sdk/msbuild-props-desktop, try right-clicking the project in Solution Explorer, then select “Edit Project File” and add two elements: 

    <Project Sdk="Microsoft.NET.Sdk">  
  <PropertyGroup>  
    . . .  
    <UseWindowsForms>true</UseWindowsForms>  
    <DisableWinExeOutputInference>true</DisableWinExeOutputInference>  
  </PropertyGroup>  
</Project>

    Now the next line should work: 

    var t = new System.Windows.Forms.TreeView( );
  3. Ken Tucker 5,866 Reputation points
    2021-03-31T09:53:57.95+00:00

    You cannot use any controls in a console application. If you need a GUI create a windows forms or WPF application

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