get the file names into textbox from dir

[Nath143]

Hello guys, i am a beginer in c#. if i type one letter in text box needs to get all the file names starts with that letter into text box in c# windows application . i want to get the all file names from the directory into the text box in win forms app.. I am giving you the code can u please correct it.please. i am giving the code can you please corret it it is very urgent to me please



[using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{


InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
// Create the list to use as the custom source.
var source = new AutoCompleteStringCollection();

AddRange(DirectoryInfo File = @"D:\gopinath\DATES");
foreach (FileInfo fi in File.getfiles)
{

textBox = fi.Name.Tostring(); //it will show the name in the text box
};

//source.AddRange(Directory.GetFiles(@"D:\gopinath\D ATES", SearchOption.AllDirectories));

// source.AddRange(new string[]
// {
// "January",
// "February",
// "March",
// "April",
// "May",
// "June",
// "July",
// "August",
// "September",
// "October",
// "November",
// "December"
// });

// Create and initialize the text box.
var textBox = new TextBox
{
AutoCompleteCustomSource = source,
AutoCompleteMode=
AutoCompleteMode.SuggestAppend,
AutoCompleteSource =
AutoCompleteSource.CustomSource,
Location = new Point(20, 20),
Width = ClientRectangle.Width - 40,
Visible = true
};

// Add the text box to the form.
Controls.Add(textBox);

}


}
}
]

[adriancs]

so, you want to get all files that start with a specific character or text. below is another approach, you may try this:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
 
namespace WindowsFormsApplication6
{
    public partial class Form1 : Form
    {
        string Folder = "D:\\";
        List<string> lstFiles;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            string[] allFiles = Directory.GetFiles(Folder);
            string startWithThis = textBox1.Text.ToUpper();
            string files = "";
            lstFiles = new List<string>();
            foreach (string s in allFiles)
            {
                string file = s.Replace(Folder, string.Empty);
                if (file.ToUpper().StartsWith(startWithThis))
                {
                    lstFiles.Add(file);
                    files += file + "\n";
                }
            }
            MessageBox.Show(files);
        }
    }
}