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drag and drop a text on on a Richtextbox

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RichTextBox (obsolete as of Q3 2014 SP1)
This is a migrated thread and some comments may be shown as answers.
Justin
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Justin asked on 05 Jun 2014, 07:12 AM
Hi there, 

I'm new to telerik controls, I want to drag and drop at text on the richtexbox. Can someone help me?

thinks.

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Stefan
Telerik team
answered on 06 Jun 2014, 07:33 AM
Hi Justin,

Thank you for writing.

Here is how you can achieve drag and drop from a text box to RadRichTextBox:
    public partial class Form1 : Form
    {
        RadTextBox radTextBox = new RadTextBox();
        Point clickedPoint;
        bool mouseDown = false;
 
        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
 
            InitializeComponent();
 
            this.Controls.Add(radTextBox);
            radTextBox.Dock = DockStyle.Top;
            radTextBox.TextBoxElement.TextBoxItem.MouseDown += tb_MouseDown;
            radTextBox.TextBoxElement.TextBoxItem.MouseMove += tb_MouseMove;
 
            AddRichTextBox();
            radRichTextBox1.AllowDrop = true;
            radRichTextBox1.DragOver += radRichTextBox1_DragOver;
            radRichTextBox1.DragDrop += radRichTextBox1_DragDrop;
        }
 
        private static bool IsRealDrag(Point mousePosition, Point initialMousePosition)
        {
            return (Math.Abs(mousePosition.X - initialMousePosition.X) >= SystemInformation.DragSize.Width) ||
                (Math.Abs(mousePosition.Y - initialMousePosition.Y) >= SystemInformation.DragSize.Height);
        }
 
        void tb_MouseMove(object sender, MouseEventArgs e)
        {
            if (mouseDown && IsRealDrag(e.Location, clickedPoint))
            {
                radTextBox.DoDragDrop(radTextBox.Text, DragDropEffects.Copy | DragDropEffects.Move);
                mouseDown = false;
            }
        }
 
        void tb_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Left)
            {
                mouseDown = true;
                clickedPoint = e.Location;
            }
        }
 
        void radRichTextBox1_DragDrop(object sender, DragEventArgs e)
        {
            string text = e.Data.GetData(typeof(string)) as string;
            radRichTextBox1.RichTextBoxElement.Document.CaretPosition.SetPosition(radRichTextBox1.PointToClient(MousePosition));
            radRichTextBox1.Insert(text);
        }
 
        void radRichTextBox1_DragOver(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Move;
        }
}

I hope that you find this information useful.

Regards,
Stefan
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Justin
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answered on 06 Jun 2014, 08:48 AM
Hi Stefan,

Thank you so much Stefan, it works.

I really appreciate

your help.
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RichTextBox (obsolete as of Q3 2014 SP1)
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Stefan
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Justin
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