Need Help from pro (Help) ?Get file from selected Directory listbox1 into listbox2?

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C#

private void Form2_Load(object sender, EventArgs e)
       {
           string path = @"\\192.168.**.**\**\**";
           string[] dirs = Directory.GetDirectories(path);

           // For folders in the directory
           foreach (string dir in dirs)
               listBox1.Items.Add(dir);
       }


private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            listBox2.Items.Clear();
            DirectoryInfo dir = (DirectoryInfo)listBox1.SelectedItem;
            foreach (FileInfo img in dir.GetFiles())
                listBox2.Items.Add(img);            
        }

//  Error Occur >>>> An unhandled exception of type 'System.InvalidCastException'

Posted 26-Oct-15 21:57pm

Nigol_Learner

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3 solutions

Solution 1

Well, what did you expect?
Look at your code:

C#

foreach (string dir in dirs)
   listBox1.Items.Add(dir);

C#

DirectoryInfo dir = (DirectoryInfo)listBox1.SelectedItem;

So every item in the ListBox os a string, and you are trying to cast it to a DirectoryInfo. There is no such cast!

Try:

C#

DirectoryInfo dir = new DirectoryInfo(listBox1.SelectedItem);

Posted 26-Oct-15 22:35pm

OriginalGriff

Comments

Kornfeld Eliyahu Peter 27-Oct-15 4:42am

Are you feeling pro, bro? :-)

Nigol_Learner 27-Oct-15 5:18am

listBox2.Items.Clear();
// DirectoryInfo dir = (DirectoryInfo)listBox1.SelectedItem;
>>>>>>>>>>>>>>DirectoryInfo dir = new DirectoryInfo(listBox1.SelectedItem);
foreach (FileInfo img in dir.GetFiles())
listBox2.Items.Add(img);

>>>>>>>(listBox1.SelectedItem)getting red underline

the Error is :
(Severity Code Description Project File Line
Error CS1503 Argument 1: cannot convert from 'object' to 'string' picView C:\Users\User\Documents\Visual Studio 2015\picView\picView\Form2.cs)

OriginalGriff 27-Oct-15 6:11am

Oh come on!
If you are writing code like this you should be able to sort that out!

DirectoryInfo dir = new DirectoryInfo((string) listBox1.SelectedItem);

Nigol_Learner 27-Oct-15 22:06pm

thank you bro,,,,now its work.

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F-ES Sitecore · Accepted Answer · 2015-10-27T00:37:00

C#

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    listBox2.Items.Clear();
    DirectoryInfo dir = new DirectoryInfo(listBox1.Text);
    foreach (FileInfo img in dir.GetFiles())
    {
        // Adds the full path
        //listBox2.Items.Add(img.FullName);

        // Adds just the filename
        listBox2.Items.Add(img.Name);
    }
}

Nigol_Learner · Accepted Answer · 2015-10-27T00:09:00

Solution 2

DirectoryInfo dir = new DirectoryInfo(listBox1.SelectedItem);

To

DirectoryInfo dir = new DirectoryInfo(listBox1.Text);

//This works.

Posted 27-Oct-15 0:09am

Nigol_Learner

Comments

Nigol_Learner 27-Oct-15 22:08pm

right bro.... thanks