How to call the method in the Page load?

chetan Allipur

9y1.2kVisual Basic .NET

Here this is my program

using System.Data;

using System.Drawing;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace SecondWeekContinues

{

public partial class TreeViewDemo : Form

{

public TreeViewDemo()

{

InitializeComponent();

ListDirectory(,"D:\\"); //See i am getting error here

}

private void ListDirectory(TreeView treeView, string path)

{

treeView1.Nodes.Clear();

var stack = new Stack();

var rootDirectory = new DirectoryInfo(path);

var node = new TreeNode(rootDirectory.Name) { Tag = rootDirectory };

stack.Push(node);

while (stack.Count > 0)

{

var currentNode = stack.Pop();

var directoryInfo = (DirectoryInfo)currentNode.Tag;

foreach (var directory in directoryInfo.GetDirectories())

{

var childDirectoryNode = new TreeNode(directory.Name) { Tag = directory };

currentNode.Nodes.Add(childDirectoryNode);

stack.Push(childDirectoryNode);

}

foreach (var file in directoryInfo.GetFiles())

currentNode.Nodes.Add(new TreeNode(file.Name));

}

treeView1.Nodes.Add(node);

}

10 Replies

Know the answer? Post it — somebody with the same question will find it here.

Gnanavel Sekar9y ago
Accepted answer
if stuck anywhere let me know, i will help you out.

same example here refer below link
http://stackoverflow.com/questions/6239544/populate-treeview-with-file-system-directory-structure
0
Tapan Patel9y ago
As you are calling method after Initialzing components, you can pass this.treeview1 as first argument.
ListDirectory(this.treeView1,"D:\\");
0
Thennarasu N9y ago
please Look at this i hope it Will help you

http://stackoverflow.com/questions/18024240/call-a-method-on-page-load
0
Bryian Tan9y ago
Based on your code, both the parameters for ListDirectory method are require.
private void ListDirectory(TreeView treeView, string path)
{
...
}
Look like the TreeView control name is treeView1, you can modify the ListDirectory method to
private void ListDirectory(string path)
{
...
}
Then on the TreeViewDemo()

public TreeViewDemo()
{
   ListDirectory ("D:\\");
}
Regarding the TreeView, look like the code is working fine, it displaying both folders and files. Did you click on the + sign to expand the folder?
0
chetan Allipur9y ago
I am not undertsanding. if you have time please send me the code(I should be Execute). I want both directory and files.
0
Marimuthu Karuppaiah9y ago
Try out this also.

http://stackoverflow.com/questions/35159549/how-to-display-all-files-under-folders-in-treeview
-1
chetan Allipur9y ago
Actully i want to display the files also, but it is only displaying folders in Treeview
0
chetan Allipur9y ago
Getting Error:
Error 1 Optional parameters must appear after all required parameters
0
chetan Allipur9y ago
I dont know what sould i pass the value to the first argument
0
Gnanavel Sekar9y ago
May i know what error you are getting?
0