how to draw rectangle based on user enterd data c# windows application

S J

how to draw rectangle based on user enterd Coordinates(X,Y) and height,Width in c# windows application.

i have taken 4 text boxes and one button when i enter coardinates X,Y,height,width value after that click on button should be create rectangle.

anybody help ,e to how to draw trectangle , i am beginer....

7 Replies

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Sachin Singh5y ago
Accepted answer
Hii
this is complete working code
just change your formName
public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        Rectangle rectangle1;
        Pen pen1;
        int x,y,w,h;
        private void button1_Click(object sender, EventArgs e)
        {
            x = Convert.ToInt32(txtX.Text);
y = Convert.ToInt32(txtY.Text);
h = Convert.ToInt32(txtWidth.Text);
w = Convert.ToInt32(txtWidth.Text);
rectangle1=new Rectangle(x,y,w,h);

            this.Invalidate();

        }

        private void Form2_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.DrawRectangle(Pens.Black, rectangle1);
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            this.Paint += Form2_Paint;
        }
    }
S J5y ago

I need to be display output in panel which is right side, but i am getting out put left side as shown in below

how to resolve this
S J5y ago
hey got it yar
private void Form2_Load(object sender, EventArgs e)
{
this.Paint += Form2_Paint;
}
this line worked, if i need do colour for that means i need t write code in Form2_paint() only na

thanku
S J5y ago
it shows argument nuul exception was handled, why means first it gonesto
Form1_paint()
{
e.Graphics.DrawRectangle(pen1, rectangle1);
}
in this pen value is null and rectangle values also 0 that is why shows exception
S J5y ago
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace DisplayRectangleBox
{
public partial class Form1 : Form
{
int x, y, h, w;
Rectangle rect = new Rectangle();
Pen pen = new Pen(Color.Black);
public Form1()
{
InitializeComponent();
}
private void btnCreate_Click(object sender, EventArgs e)
{
createRectangle();

}
public void Validations()
{
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
//createRectangle();
//System.Drawing.Graphics graphicsObj;
//graphicsObj = this.CreateGraphics();
//e.Graphics.DrawRectangle(pen, rect);
}
public void createRectangle()
{
x = Convert.ToInt32(txtX.Text);
y = Convert.ToInt32(txtY.Text);
h = Convert.ToInt32(txtWidth.Text);
w = Convert.ToInt32(txtWidth.Text);
//Rectangle rect = new Rectangle();
//rect.X = x;
//rect.Y = y;
//rect.Height = h;
//rect.Width = w;
System.Drawing.SolidBrush myBrush = new System.Drawing.SolidBrush(System.Drawing.Color.Red);
System.Drawing.Graphics formGraphics;
formGraphics = this.CreateGraphics();
formGraphics.FillRectangle(myBrush, new Rectangle(0, 0, 0, 0));
myBrush.Dispose();
formGraphics.Dispose();
Rectangle rectangle1 = new Rectangle(x, y, w, h);

formGraphics.DrawRectangle(myBrush,rectangle1);

//this.Controls.Add(rectangle1);
//Pen pen = new Pen(Color.Black);
//panel1.Controls.Add();

// .Add(rect);
}
}
}

here is code check once
S J5y ago
nothing is displaying on screen
Sachin Singh5y ago
System.Drawing.SolidBrush myBrush = new System.Drawing.SolidBrush(System.Drawing.Color.Red);
System.Drawing.Graphics formGraphics;
formGraphics = this.CreateGraphics();
formGraphics.FillRectangle(myBrush, new Rectangle(0, 0, 200, 300));
myBrush.Dispose();
formGraphics.Dispose();
where new Rectangle(x,y,width,height) all parameters are int , so use Convert.ToInt32(Textbox1.text) and so on
a simple rectangle will be
Rectangle rectangle1 = new Rectangle(50, 50, 200, 100); (x=50,y=50,width=200,height=100);