linear-app-launcher/FizzyLauncher.UI/RyzStudio/Windows/ThemedForms/TOpenFileTextBox.cs

using System;
using System.IO;
using System.Windows.Forms;
using Resources = AppLauncher.Properties.Resources;

namespace RyzStudio.Windows.ThemedForms
{
    public class TOpenFileTextBox : TButtonTextBox
    {
        public TOpenFileTextBox() : base()
        {
            this.NormalImage = Resources.file16_a;
            this.HighlightImage = Resources.file16_b;
            this.Text = string.Empty;
        }

        public OpenFileDialog FileDialog { get; set; } = null;

        protected override void imageBox1_Click(object sender, EventArgs e)
        {
            if (this.FileDialog == null)
            {
                this.FileDialog = new OpenFileDialog();
                this.FileDialog.Title = "Choose a file";
                this.FileDialog.Filter = "All files|*";
            }

            if (!string.IsNullOrWhiteSpace(this.Text))
            {
                if (File.Exists(this.Text))
                {
                    this.FileDialog.InitialDirectory = Path.GetDirectoryName(this.Text);
                }
            }

            if (this.FileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                this.Text = this.FileDialog.FileName;
            }
        }

    }
}