treeview code with fixed directory

Question

i need help with this piece of code to get files from directory and populate them in treeview.

foreach (DirectoryInfo directory in directories)
{
    TreeNode node = TreeView.Nodes[0].Nodes.Add(directory.Name);
    node.ImageIndex = 1;


    foreach (FileInfo file in directory.GetFiles())
    {
        if (file.Exists)
        {
            TreeNode nodes = TreeView.Nodes[0].Nodes(node.Index).Nodes.Add(file.Name);
            nodes.ImageIndex = 2;
        }
    }
}

i get this error: An object reference is required for the non-static field, method, or property 'System.Windows.Forms.TreeView.Nodes.get'

i appreciate any kind of help thanks

Looks like the error would be generated on the first line after the initial foreach... TreeView is a class name and probably not the name of your object. What is the TreeView object named? — ChrisLively
– ChrisLively, Commented Mar 18, 2013 at 21:35
Try replacing the name TreeView with the actual name of the control. — IAbstract
– IAbstract, Commented Mar 18, 2013 at 21:36

keyboardP · Accepted Answer · 2013-03-18 21:36:04Z

3

TreeView is not a static class which is why you're getting that error message. You should change where you've used TreeView to the actual name of your instance.

For example:

TreeNode node = TreeView.Nodes[0].Nodes.Add(directory.Name);

should be

//myTreeView is the name of my TreeView object
TreeNode node = myTreeView.Nodes[0].Nodes.Add(directory.Name);

answered Mar 18, 2013 at 21:36

keyboardP

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M P · Accepted Answer · 2013-03-18 21:42:08Z

0

I think what you want it this.

var directories = Directory.GetDirectories("c:\\users");
foreach (string directoryName in directories)
{
    var directory = new DirectoryInfo(directoryName);
    var node = new TreeNode(directory.Name);
    node.ImageIndex = 1;

    foreach (FileInfo file in directory.GetFiles())
    {
        if (file.Exists)
        {
            var nodes = node.Nodes.Add(file.Name);
            nodes.ImageIndex = 2;
        }
    }
    treeView1.Nodes.Add(node);
}

answered Mar 18, 2013 at 21:42

M P

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2 Comments

Hassan Khatib Over a year ago

thanks for your help it worked awsome. i need help in the following, i have Form2 with adobe pdf reader tool in it, and some of the files in Form1 are pdf, how can i preview the pdf files in treeview in Form1 in adobe pdf reader in Form2

M P Over a year ago

Glad it worked for you. As for the Adobe Reader, the question isn't related to this thread but you can look into "Adobe Reader ActiveX Control". There is a good article a this link which shows you exactly how to do this. c-sharpcorner.com/uploadfile/hirendra_singh/… :)

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