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

DataFormats.Text

<source lang="csharp">

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();
   }

}

 </source>