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Drawing to a Picture

Posted on 2003-12-08
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Last Modified: 2010-04-16
This may sound kind of stupid. Anyway.

I need to do some test data, and so I wanted to make 1000 images with numbers in them. So I figured It would be easier to write a program to just use a Random function to write a bunch of numbers and save them as an image. . . however I'm somewhat perplexed on how to draw to an actual file. I can draw to the form or a picturebox just fine .....but I think I might have just answered my own question with the picturebox. Well, If anyone has any suggestions please let me know..
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Question by:derekthornton
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LVL 7

Accepted Solution

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TransBind earned 500 total points
ID: 9899113
I didn't compile this so not sure about syntax etc ..., sorry I am at work, but I think thats how u can do it.

        // This example creates a PictureBox control on the form and draws to it.
        // This example assumes that the Form_Load event handling method is
        // connected to the Load event of the form.

       
        private PictureBox pictureBox1 = new PictureBox();
       
        private void Form1_Load(object sender, System.EventArgs e)
        {
            // Dock the PictureBox to the form and set its background to white.
            pictureBox1.Dock = DockStyle.Fill;
            pictureBox1.BackColor = Color.White;
            // Connect the Paint event of the PictureBox to the event handling method.
            pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);

            // Add the PictureBox control to the Form.
            this.Controls.Add(pictureBox1);
        }

        private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            Random R =new Random();

            // Create a local version of the graphics object for the PictureBox.
            Graphics g = e.Graphics;
            //Calling the Next method without any arguments will generate a random number which is greater than or equal to zero and less than the maximum size of int (which i do not pass).

            for(I = 0; I < 1000; I++)
            {
                   // Draw a number on the PictureBox.
            g.DrawString(R.Next().toString(),
             new Font("Arial",10), System.Drawing.Brushes.Blue, new Point(30,30));
            }
         
           
        }
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LVL 7

Expert Comment

by:TransBind
ID: 9899139
Perhaps this will contribute as well.
class MyRandom
{
      public static void Main()
      {
            Random R =new Random();
            int I;
            int MaxLimit = 5000;
            int MinLimit = 1000;
            for(I = 0; I < 10; I++)
            {
                  Console.WriteLine(R.Next(MinLimit,MaxLimit));
            }
      }
}
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LVL 2

Author Comment

by:derekthornton
ID: 9899171
Yes, it works. Can you save a Graphics Object as a File? Or Do I need to save the PictureBox contents each time the loop iterates ( speed isn't an issue here, this is just to create some test data )
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LVL 7

Expert Comment

by:TransBind
ID: 9899210
private void MainForm_Paint(object sender,                             System.Windows.Forms.PaintEventArgs e)
{

 Graphics g = e.Graphics;  
  Random R =new Random();
   for(I = 1; I <= 1000; I++)
          {

MyBitmap = new Bitmap("c:\\image" + I + ".bmp");    
 g.DrawString(R.Next().toString(),
             new Font("Arial",10), System.Drawing.Brushes.Blue, new Point(30,30));
         }
}
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LVL 7

Expert Comment

by:TransBind
ID: 9899218
i guess something like that
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LVL 2

Author Comment

by:derekthornton
ID: 9899245
Hrnm.. That doesn't seem to work. It is throwing me an exception at the Application.Run Method in my Main Class..
0
 
LVL 2

Author Comment

by:derekthornton
ID: 9899249
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace WindowsApplication1
{
      /// <summary>
      /// Summary description for Form1.
      /// </summary>
      public class Form1 : System.Windows.Forms.Form
      {
            private System.Windows.Forms.PictureBox pictureBox1;
            /// <summary>
            /// Required designer variable.
            /// </summary>
            private System.ComponentModel.Container components = null;

            public Form1()
            {
                  //
                  // Required for Windows Form Designer support
                  //
                  InitializeComponent();

                  //
                  // TODO: Add any constructor code after InitializeComponent call
                  //
            }

            /// <summary>
            /// Clean up any resources being used.
            /// </summary>
            protected override void Dispose( bool disposing )
            {
                  if( disposing )
                  {
                        if (components != null)
                        {
                              components.Dispose();
                        }
                  }
                  base.Dispose( disposing );
            }

            #region Windows Form Designer generated code
            /// <summary>
            /// Required method for Designer support - do not modify
            /// the contents of this method with the code editor.
            /// </summary>
            private void InitializeComponent()
            {
                  this.pictureBox1 = new System.Windows.Forms.PictureBox();
                  this.SuspendLayout();
                  //
                  // pictureBox1
                  //
                  this.pictureBox1.Location = new System.Drawing.Point(0, 0);
                  this.pictureBox1.Name = "pictureBox1";
                  this.pictureBox1.TabIndex = 0;
                  this.pictureBox1.TabStop = false;
                  this.pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);
                  //
                  // Form1
                  //
                  this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
                  this.ClientSize = new System.Drawing.Size(292, 266);
                  this.Controls.Add(this.pictureBox1);
                  this.Name = "Form1";
                  this.Text = "Form1";
                  this.Load += new System.EventHandler(this.Form1_Load);
                  this.ResumeLayout(false);

            }
            #endregion

            /// <summary>
            /// The main entry point for the application.
            /// </summary>
            [STAThread]
            static void Main()
            {
                  Application.Run(new Form1());
            }

            private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
            {
                  Random R =new Random();

                  // Create a local version of the graphics object for the PictureBox.
                  Graphics g = e.Graphics;
                  //Calling the Next method without any arguments will generate a random number which is greater than or equal to zero and less than the maximum size of int (which i do not pass).

                  for(int I = 0; I < 1000; I++)
                  {
                        Bitmap MyBitmap = new Bitmap(@"C:\TestData\Test" + I + "Bmp");
                        // Draw a number on the PictureBox.
                        g.DrawString(R.Next().ToString(),
                              new Font("Arial",10),
                              System.Drawing.Brushes.Blue, new Point(30,30));

                  }
         
            }

            private void Form1_Load(object sender, System.EventArgs e)
            {
                  // Dock the PictureBox to the form and set its background to white.
                  pictureBox1.Dock = DockStyle.Fill;
                  pictureBox1.BackColor = Color.White;
                  // Connect the Paint event of the PictureBox to the event handling method.
                  pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);

                  // Add the PictureBox control to the Form.
                  this.Controls.Add(pictureBox1);
            }
      }
}

This is what I've got so far.
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LVL 7

Expert Comment

by:TransBind
ID: 9899251
no thats wrong i can already see it
0
 
LVL 2

Author Comment

by:derekthornton
ID: 9899269
Alright. What do you see that isn't right? For some reason it's telling me I'm passing an invalid parameter through the Main Function.
0
 
LVL 2

Author Comment

by:derekthornton
ID: 9899433
Got it! Thanks for the help.
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