Sanya-ips/ipslib/Ips.Library.DxpLib/Extensions/EditorExtensions.cs

using DevExpress.XtraEditors;
using Ips.Library.Basic;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Ips.Library.DxpLib
{
    public static class EditorExtensions
    {
        public static void EnableDragDropFile(this TextEdit textBox)
        {
            textBox.AllowDrop = true;
            textBox.DragDrop += TextBox_DragDrop;
            textBox.DragOver += TextBox_DragOver;
        }

        private static void TextBox_DragOver(object sender, DragEventArgs e)
        {
            e.Effect = e.Data.GetDataPresent(DataFormats.FileDrop) ? DragDropEffects.Copy : DragDropEffects.None;
        }

        private static void TextBox_DragDrop(object sender, DragEventArgs e)
        {
            string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
            var self = sender as TextEdit;
            if (files != null && files.Length != 0)
            {
                self.Text = files.JoinAsString(";");
            }
        }
    }
}