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namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
richTextBox1.AllowDrop = true;
richTextBox1.DragEnter += new DragEventHandler(richTextBox1_DragEnter);
richTextBox1.DragDrop += new DragEventHandler(richTextBox1_DragDrop);
}
private void richTextBox1_DragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
e.Effect = DragDropEffects.Link;
}
else
{
e.Effect = DragDropEffects.None;
}
}
private void richTextBox1_DragDrop(object sender, DragEventArgs e)
{
Array arrayFileName = (Array)e.Data.GetData(DataFormats.FileDrop);
string strFileName = arrayFileName.GetValue(0).ToString();
StreamReader sr = new StreamReader(strFileName,System.Text.Encoding.Default);
richTextBox1.Text = sr.ReadToEnd();
sr.Close();
}
}
}
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