Csharp/C Sharp by API/System.Windows.Forms/DataFormats

DataFormats.Text

  

using System;
using System.Windows.Forms;
public class TextBoxDragDropDemo : Form
{
    public TextBoxDragDropDemo()
    {
        InitializeComponent();
    }
    private void TextBox_MouseDown(object sender, MouseEventArgs e)
    {
        TextBox txt = (TextBox)sender;
        txt.SelectAll();
        txt.DoDragDrop(txt.Text, DragDropEffects.Copy);
    }
    private void TextBox_DragEnter(object sender, DragEventArgs e)
    {
        if (e.Data.GetDataPresent(DataFormats.Text))
        {
            e.Effect = DragDropEffects.Copy;
        }
        else
        {
            e.Effect = DragDropEffects.None;
        }
    }
    private void TextBox_DragDrop(object sender, DragEventArgs e)
    {
        TextBox txt = (TextBox)sender;
        txt.Text = (string)e.Data.GetData(DataFormats.Text);
    }
    [STAThread]
    public static void Main(string[] args)
    {
        Application.Run(new TextBoxDragDropDemo());
    }
    private System.Windows.Forms.TextBox TextBox2;
    private System.Windows.Forms.TextBox TextBox1;
    private void InitializeComponent()
    {
        this.TextBox2 = new System.Windows.Forms.TextBox();
        this.TextBox1 = new System.Windows.Forms.TextBox();
        this.SuspendLayout();
        this.TextBox2.AllowDrop = true;
        this.TextBox2.Location = new System.Drawing.Point(28, 129);
        this.TextBox2.Multiline = true;
        this.TextBox2.Size = new System.Drawing.Size(196, 77);
        this.TextBox2.DragDrop += new System.Windows.Forms.DragEventHandler(this.TextBox_DragDrop);
        this.TextBox2.DragEnter += new System.Windows.Forms.DragEventHandler(this.TextBox_DragEnter);
        this.TextBox2.MouseDown += new System.Windows.Forms.MouseEventHandler(this.TextBox_MouseDown);
        this.TextBox1.AllowDrop = true;
        this.TextBox1.Location = new System.Drawing.Point(28, 36);
        this.TextBox1.Multiline = true;
        this.TextBox1.Size = new System.Drawing.Size(196, 77);
        this.TextBox1.DragDrop += new System.Windows.Forms.DragEventHandler(this.TextBox_DragDrop);
        this.TextBox1.DragEnter += new System.Windows.Forms.DragEventHandler(this.TextBox_DragEnter);
        this.TextBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.TextBox_MouseDown);
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(292, 266);
        this.Controls.Add(this.TextBox2);
        this.Controls.Add(this.TextBox1);
        this.ResumeLayout(false);
        this.PerformLayout();
    }
}