Windows Explorer in C#

The above code will add all files and folders under one folder using a recursive function but to get the default file icon we need to call the getFileExtension() Method by ing in the argument file name. We can use the same coding logic for getting the files and folders on the desktop as well as from the My Documents.

The coding for the getFileExtension() Method is:

private void getFileExtension(string filename)
{
switch (Path.GetExtension(filename))
{
case ".txt":
case ".rtf":
filenode.ImageIndex = 6;
break;
case ".doc":
case ".docx":
filenode.ImageIndex = 0;
break;
case ".html":
case ".htm":
filenode.ImageIndex = 3;
break;
case ".rar":
case ".zip":
filenode.ImageIndex = 9;
break;
case ".java":
filenode.ImageIndex = 10;
break;
default:
filenode.ImageIndex = 7;
break;
}
}

This will get the file extension and based on the ImageIndex of the specified case will display the image icon for the file and for the rest of the file it will display an unknown icon image file.

Now we to need to write the code for displaying the data in the TreeView and on select of a node we need to display the content of that folder in the ListView. We'll write the code in the AfterSelect event of our TreeView.

private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
try
{
listView1.Items.Clear();
TreeNode selectednode = e.Node;
treeView1.SelectedNode.ImageIndex = e.Node.ImageIndex;
selectednode.Expand();
textBox1.Text = selectednode.FullPath;
if (selectednode.Nodes.Count > 0)
{
foreach (TreeNode n in selectednode.Nodes)
{
ListViewItem lst = new ListViewItem(n.Text, n.ImageIndex);
lst.Name = n.FullPath.Substring(13);
MessageBox.Show("List Node : " + lst.Name);
listView1.Items.Add(lst);
}
}
else
{
listView1.Items.Add(selectednode.FullPath, selectednode.Text, selectednode.ImageIndex);
}
}
catch (Exception e1)
{
}
}

Now when you select any node from the TreeView it will display all the folders and the files in the ListView with their defualt icons.

Now we need to write code for the double-click event of the ListView; it should display all the files and folders under that folder. Right-click on the ListView and go to events and double-click on the mouseDoubleClick event of the ListView. This will diplay a listView1_MouseDoubleClick for the ListView.

private void listView1_MouseDoubleClick(object sender, MouseEventArgs e)
{
for (int i = 0; i < listView1.Items.Count; i++)
{
if (listView1.Items[i].Selected==true)
{
path = listView1.Items[i].Name;
textBox1.Text = path;
listView1.Items.Clear();
LoadFilesAndDir(path);
}
}
}

The LoadFilesAndDir function will open all the directories and the files under the specified path. The following is the coding logic for it.

private void LoadFilesAndDir(string address)
{
DirectoryInfo di = new DirectoryInfo(address);
try
{
foreach (FileInfo fi in di.GetFiles())
{
listView1.Items.Add(fi.Name, filenode.ImageIndex);
}
try
{
foreach(DirectoryInfo listd in di.GetDirectories())
{
listView1.Items.Add(listd.FullName,listd.Name, 2);
}
}
catch (Exception e1)
{
}
}
catch (Exception e1)
{
}
}

In my further program we'll try to create the coding logic for the forward and backward buttons which are there in the Windows Explorer. Hope you like this example and it will help you to carry out your program.

Untill the next time Enjoy Programming.