How to Move a Form, on mouse Move.

Question

3.00/5 (4 votes)

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C#2.0

C#

How to Drag Form, like press Mouse on Form and Move it

Posted 1-Apr-11 1:33am

Bhavna v

Updated 1-Apr-11 1:35am

Brijesh Kr

v2

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2 solutions

Solution 2

What's going on here? Anyway, for the googlers I did also some copy paste for this trivial problem.

C#

using System;
using System.Drawing;
using System.Windows.Forms;

namespace MovableForm
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            Application.Run(new MovableForm());
        }

        public partial class MovableForm : Form
        {
            int m_iWindowPosX;
            int m_iWindowPosY;

            public MovableForm()
            {
                FormBorderStyle = FormBorderStyle.None;
            }

            protected override void OnMouseDown(MouseEventArgs e)
            {
                m_iWindowPosX = e.X;
                m_iWindowPosY = e.Y;

                base.OnMouseDown(e);
            }

            protected override void OnMouseMove(MouseEventArgs e)
            {
                if (e.Button == MouseButtons.Left)
                    Location = new Point(Location.X - m_iWindowPosX + e.X, Location.Y - m_iWindowPosY + e.Y);

                base.OnMouseMove(e);
            }
        }
    }
}

Posted 1-Apr-11 2:14am

johannesnestler

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Brijesh Kr · Accepted Answer · 2011-04-01T01:36:00

Solution 1

Try Follow:

C#

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        bool mousedown;
        int x, y;
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                x = MousePosition.X - DesktopLocation.X;
                y = MousePosition.Y - DesktopLocation.Y;
                mousedown = true;
            }
        }
        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if(mousedown)
            {
                SetBounds(MousePosition.X - y, MousePosition.Y - y, Width, Height);
            }
        }
        private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            mousedown = false;
        }
    }
}

Posted 1-Apr-11 1:36am

Brijesh Kr

Comments

Tarun.K.S 1-Apr-11 7:41am

What is SetBounds? And you answered the question in just 3 minutes after she posted the question (as if you know she will post it). Something's fishy.

Albin Abel 1-Apr-11 7:53am

Ha ha, Copy pasting revealed. May be OP wants only coding than explanations.

Tarun.K.S 1-Apr-11 7:58am

Exactly! I think both are related to each other. It was planned by both of them! Check bhavna's comments, messages and questions etc. Brijesh's answers were marked as solved. Check it out!

Albin Abel 1-Apr-11 8:02am

Ha ha. Teacher student relationship revealed

Tarun.K.S 1-Apr-11 8:04am

Hahahahaa! Wish I could upvote your comment! :D

Albin Abel 1-Apr-11 8:10am

No worries. Let me keep my thinking in a positive way. As he is a trainer they may want to tell "hello world" to the .Net community. Let us welcome. However validity checks should be necessary

Tarun.K.S 1-Apr-11 8:14am

I understand, but they are misusing it. She will ask a question only to be answered by him to gather more points, also most of the answer were not upto the mark.

[no name] 1-Apr-11 22:27pm

sets the specified bound of control to the specified loaction and size

Albin Abel 1-Apr-11 7:48am

You want to set bounds or location?

Tarun.K.S 1-Apr-11 7:59am

This code doesn't even work!

[no name] 1-Apr-11 22:29pm

Try Once it works

johannesnestler 1-Apr-11 8:15am

this code is not working...

[no name] 1-Apr-11 22:29pm

You should use proper events.
Try Once

[no name] 1-Apr-11 22:33pm

Please try it with proper events and variable.