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Newbie - Help with tutorial (Progress Bar)

Posted on 2008-06-24
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Last Modified: 2011-09-20
Hello,

I'm trying to following a fairly basic example: http://support.microsoft.com/kb/323116

I got up to the bit where it says "Add the following code to the class module of the UserControl, just after the "Windows Form Designer generated code" section. Note In Visual Studio 2005, put the following code in the SmoothProgressBar.cs file."

The content of SmoothProgressBar.cs is given below.

The problem is that wherever I place the code I get errors - Am I missing something obvious ?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
 
namespace SmoothProgressBar
{
    public partial class SmoothProgressBar : UserControl
    {
        public SmoothProgressBar()
        {
            InitializeComponent();
        }
    }
}

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Question by:andyw27
2 Comments
 
LVL 10

Accepted Solution

by:
Marcjev earned 2000 total points
ID: 21859462
This is my file with the example code in it... it builds fine like this
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
 
namespace SmoothProgressBar
{
    public partial class SmoothProgressBar : UserControl
    {
        public SmoothProgressBar()
        {
            InitializeComponent();
        }
        int min = 0;	// Minimum value for progress range
        int max = 100;	// Maximum value for progress range
        int val = 0;		// Current progress
        Color BarColor = Color.Blue;		// Color of progress meter
 
        protected override void OnResize(EventArgs e)
        {
            // Invalidate the control to get a repaint.
            this.Invalidate();
        }
 
        protected override void OnPaint(PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            SolidBrush brush = new SolidBrush(BarColor);
            float percent = (float)(val - min) / (float)(max - min);
            Rectangle rect = this.ClientRectangle;
 
            // Calculate area for drawing the progress.
            rect.Width = (int)((float)rect.Width * percent);
 
            // Draw the progress meter.
            g.FillRectangle(brush, rect);
 
            // Draw a three-dimensional border around the control.
            Draw3DBorder(g);
 
            // Clean up.
            brush.Dispose();
            g.Dispose();
        }
 
        public int Minimum
        {
            get
            {
                return min;
            }
 
            set
            {
                // Prevent a negative value.
                if (value < 0)
                {
                    min = 0;
                }
 
                // Make sure that the minimum value is never set higher than the maximum value.
                if (value > max)
                {
                    min = value;
                    min = value;
                }
 
                // Ensure value is still in range
                if (val < min)
                {
                    val = min;
                }
 
                // Invalidate the control to get a repaint.
                this.Invalidate();
            }
        }
 
        public int Maximum
        {
            get
            {
                return max;
            }
 
            set
            {
                // Make sure that the maximum value is never set lower than the minimum value.
                if (value < min)
                {
                    min = value;
                }
 
                max = value;
 
                // Make sure that value is still in range.
                if (val > max)
                {
                    val = max;
                }
 
                // Invalidate the control to get a repaint.
                this.Invalidate();
            }
        }
 
        public int Value
        {
            get
            {
                return val;
            }
 
            set
            {
                int oldValue = val;
 
                // Make sure that the value does not stray outside the valid range.
                if (value < min)
                {
                    val = min;
                }
                else if (value > max)
                {
                    val = max;
                }
                else
                {
                    val = value;
                }
 
                // Invalidate only the changed area.
                float percent;
 
                Rectangle newValueRect = this.ClientRectangle;
                Rectangle oldValueRect = this.ClientRectangle;
 
                // Use a new value to calculate the rectangle for progress.
                percent = (float)(val - min) / (float)(max - min);
                newValueRect.Width = (int)((float)newValueRect.Width * percent);
 
                // Use an old value to calculate the rectangle for progress.
                percent = (float)(oldValue - min) / (float)(max - min);
                oldValueRect.Width = (int)((float)oldValueRect.Width * percent);
 
                Rectangle updateRect = new Rectangle();
 
                // Find only the part of the screen that must be updated.
                if (newValueRect.Width > oldValueRect.Width)
                {
                    updateRect.X = oldValueRect.Size.Width;
                    updateRect.Width = newValueRect.Width - oldValueRect.Width;
                }
                else
                {
                    updateRect.X = newValueRect.Size.Width;
                    updateRect.Width = oldValueRect.Width - newValueRect.Width;
                }
 
                updateRect.Height = this.Height;
 
                // Invalidate the intersection region only.
                this.Invalidate(updateRect);
            }
        }
 
        public Color ProgressBarColor
        {
            get
            {
                return BarColor;
            }
 
            set
            {
                BarColor = value;
 
                // Invalidate the control to get a repaint.
                this.Invalidate();
            }
        }
 
        private void Draw3DBorder(Graphics g)
        {
            int PenWidth = (int)Pens.White.Width;
 
            g.DrawLine(Pens.DarkGray,
                new Point(this.ClientRectangle.Left, this.ClientRectangle.Top),
                new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Top));
            g.DrawLine(Pens.DarkGray,
                new Point(this.ClientRectangle.Left, this.ClientRectangle.Top),
                new Point(this.ClientRectangle.Left, this.ClientRectangle.Height - PenWidth));
            g.DrawLine(Pens.White,
                new Point(this.ClientRectangle.Left, this.ClientRectangle.Height - PenWidth),
                new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Height - PenWidth));
            g.DrawLine(Pens.White,
                new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Top),
                new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Height - PenWidth));
        } 
 
    }
}

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Author Comment

by:andyw27
ID: 21859519
Thank you, it works now.
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