How to search in a folder by the name or extension of a file in winForm in C#?

Question

First of all we should get a directory by the user. then in the specified folder we want to search a file by its name or its extension. for example in that folder we want to search a name "Book" or an extension like .txt . Suppose that we have a Browse button, and by clicking on it we get the path and show it in a label(in the below code it is label1). and we have a Search button and a textBox that we should write the name or extension in textBox and by clicking on Search button the result(the founded files' names) would be shown in a MessageBox.
i have written a piece of code that only gets the path and i don't know how to write the rest.

private void Browse_Click(object sender, EventArgs e) { if (folderBrowserDialog1.ShowDialog() == DialogResult.OK) { this.label1.Text = folderBrowserDialog1.SelectedPath; Directory = label1.ToString(); } }

You're looking for System.IO.Directory.GetFiles()...

Idle_Mind
– Idle_Mind

2017-07-01 18:36:23 +00:00
Commented Jul 1, 2017 at 18:36 — Idle_Mind
– Idle_Mind, Commented Jul 1, 2017 at 18:36

Idle_Mind · Accepted Answer · 2017-07-02 13:19:05Z

Here's a simple example of using Directory.GetFiles() with a search pattern:

 private void Browse_Click(object sender, EventArgs e) { if (folderBrowserDialog1.ShowDialog() == DialogResult.OK) { string[] matches = Directory.GetFiles(folderBrowserDialog1.SelectedPath, "*book*"); // use "*.txt" to find all text files if (matches.Length > 0) { foreach (string file in matches) { Console.WriteLine(file); } } else { MessageBox.Show("No matches found!"); } } }

J1B · Accepted Answer · 2017-07-01 21:43:59Z

suppose your search button's click event use following function

private void Search_Click(object sender, EventArgs e) { DirectoryInfo Di=new DirectoryInfo(label1.Text); foreach(FileInfo fi in Di.GetFiles()) { textbox.Text+=fi.Name+"\r\n"; } }

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