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

Question

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....

Sachin Singh · 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; } }

Sachin Singh · Answer

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);

S J · Answer

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 J · Answer

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 J · Answer

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 J · Answer

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 J · Answer

nothing is displaying on screen

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

Answers (7)