private void Form3_DragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
e.Effect = DragDropEffects.All;
}
else
{
e.Effect = DragDropEffects.None;
} } private void Form3_DragDrop(object sender, DragEventArgs e)
{
string[] filePaths = (string[])e.Data.GetData(DataFormats.FileDrop, false);
if (null != filePaths && filePaths.Length > )
{
foreach (string item in filePaths)
{
var lines = System.IO.File.ReadAllLines(item);
Array.ForEach(lines.ToArray(), n => richTextBox1.AppendText(n.ToString() + "\r\n"));
}
}
}