File Search By Extension in C#

• One TextBox Control
• One ComboBox Control
• One ListBox Control
• Two Button Control

Procedure:

Step 1: Arrange the mentioned controls on windows form as follows.



Step 2: Write Code section for accessing path as String.

    private void btnFolder_Click(object sender, EventArgs e)
    {    
        FolderBrowserDialog fbd = new FolderBrowserDialog();
        fbd.ShowDialog();
        textBox1.Text = fbd.SelectedPath.ToString();
    }

Step 3: Now, select Extension Type from ComboBox Control for Searching Files.



Step 4: Now, Code to search the desired files from given path.
 
    private void btnSearch_Click(object sender, EventArgs e)
    {
        String path = textBox1.Text;
        string[] files = Directory.GetFiles(@path);
        bool search = false; //returns true if file(s) found

        for (int i = 0; i < files.Length; i++)
        {
            if (String.Compare(Path.GetExtension(files[i]), comboBox1.Text , true) == 0)
            {
                search = true;
                listBox1.Items.Add(files[i]);
            }
        }

        if (search == false)
        {
            listBox1.Items.Add("Search is Complete. There are no results to display.");
            label1.Text = "Total Files: 0";
        }
        else
        { 
            label1.Text = "Total Files: " + listBox1.Items.Count.ToString(); }
        }
    }

Step 5: Click the “Search” Button Control.

Step 6: If intended results found then the Name of that files are displayed in ListBox Control.

Intended Result:



Summary:

In this article, we have seen how we to find the file names (of particular extension) from specified directory using C#.