Progress Bar

Posted on 2015-01-15
Last Modified: 2015-01-29
Hi All,


I am developing a desktop application using C# winForms. In this application i am sending the bulk emails to recipients. I want to develop a progress bar as shown in attached snap shot.

Please help me to achieve.

Thanks in advance.
Question by:Jatin Nahar
LVL 35

Expert Comment

ID: 40551111
Do you mean you want it to look exactly like the picture (you already know basic coding, except for it to look like that), or just basic code (with the basic built-in winforms progress bar)?
LVL 33

Accepted Solution

ste5an earned 500 total points
ID: 40551117
Well, there are a lot of free or almost free component suites out there, e.g. SyncFusions Community License. But if you would do it on your own, here's an MSDN article about it:

How to create a smooth progress bar in Visual C#
LVL 16

Expert Comment

by:Rose Babu
ID: 40551421
Hi Jatin Nahar,

Try the below code which looks like the one you wanted...

private void button1_Click(object sender, EventArgs e)
	int percent = (int)(((double)progressBar1.Value / (double)progressBar1.Maximum) * 100);
	progressBar1.CreateGraphics().DrawString(percent.ToString() + "%", new Font("Arial", (float)8.25, FontStyle.Regular), Brushes.Black, new PointF(progressBar1.Width / 2 - 10, progressBar1.Height / 2 - 7));
	int emailMinCountVal = 0;
	int emailMaxCountVal = 200; // Reset it with your total email count

	progressBar1.Minimum = emailMinCountVal;
	progressBar1.Maximum = emailMaxCountVal;

	progressBar1.Value = emailMinCountVal;

	for (int i = 0; i <= emailMaxCountVal; i++)
		// Your email goes here as one by one

		progressBar1.Value = i;                           
		percent = (int)(((double)progressBar1.Value / (double)progressBar1.Maximum) * 100);
		progressBar1.CreateGraphics().DrawString(percent.ToString() + "%", new Font("Arial", (float)8.25, FontStyle.Regular), Brushes.Black, new PointF(progressBar1.Width / 2 - 10, progressBar1.Height / 2 - 7));
		// Set some sleep time if you need . May be the email process will take some seconds of time. So sleep may not required

	progressBar1.CreateGraphics().DrawString("100%", new Font("Arial", (float)8.25, FontStyle.Regular), Brushes.Black, new PointF(progressBar1.Width / 2 - 10, progressBar1.Height / 2 - 7));

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For coloring the progressbar try the tutorials in the below URL

Hope this will help you.

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LVL 20

Expert Comment

by:Daniel Van Der Werken
ID: 40551684
The core problem with progress bars in windows applications is the fact that you're trying to update a UI element from within a thread.

As a result, you will get an error when trying to update a progress bar. I think that might be the core issue here. You need to do some asynchronous programming with delegates and invoking:

As described in the link I provide, you want to set the property on a control:

private delegate void SetControlPropertyThreadSafeDelegate(Control control, string propertyName, object propertyValue);

public static void SetControlPropertyThreadSafe(Control control, string propertyName, object propertyValue)
  if (control.InvokeRequired)
    control.Invoke(new SetControlPropertyThreadSafeDelegate(SetControlPropertyThreadSafe), new object[] { control, propertyName, propertyValue });
    control.GetType().InvokeMember(propertyName, BindingFlags.SetProperty, null, control, new object[] { propertyValue });

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So, I updated a label in my windows forms application in the loop that does the work, I added this:

SetControlPropertyThreadSafe(lblOutputCount, "Text", i.ToString());

Where lblOutputCount is the name of my label, "Text" is the name of the property (every label has this), and the value I want to display is my iterator (i).

You would then pass in your control (the progress bar) as the control, the property (percentage) and the value same as I did.
LVL 33

Expert Comment

ID: 40560546
It suprises me that no one mentioned the BackgroundWorker.  Don't get me wrong, Dan7l, I personally use an extension method when I have doubt's about when a control will be accessed (via the UI thread or some other thread).  But when I know that a control is going to be accessed via a non-UI thread, I lean on the BackgroundWorker.

Example -

Form1.cs -
using System;
using System.ComponentModel;
using System.Windows.Forms;

namespace EE_Q28597243
	public partial class Form1 : Form
		public Form1()

		private void OnClick(object sender, EventArgs e)

		private void OnDoWork(object sender, DoWorkEventArgs e)
			// Put your logic to actually process emails here.
			for (int i = 0; i < 28; i++)
				worker.ReportProgress(((100 * (i + 1)) / 28), new object[] { i + 1, "28" });

		private void OnProgressChanged(object sender, ProgressChangedEventArgs e)
			object[] state = (object[])e.UserState;
			progressBar1.Value = e.ProgressPercentage;
			label1.Text = string.Format("Processed {0} of {1} emails", state[0], state[1]);

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Form1.Designer.cs -
namespace EE_Q28597243
	partial class Form1
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.IContainer components = null;

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
		protected override void Dispose(bool disposing)
			if (disposing && (components != null))

		#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.btnSend = new System.Windows.Forms.Button();
			this.worker = new System.ComponentModel.BackgroundWorker();
			this.progressBar1 = new System.Windows.Forms.ProgressBar();
			this.label1 = new System.Windows.Forms.Label();
			// btnSend
			this.btnSend.Location = new System.Drawing.Point(107, 120);
			this.btnSend.Name = "btnSend";
			this.btnSend.Size = new System.Drawing.Size(75, 23);
			this.btnSend.TabIndex = 1;
			this.btnSend.Text = "Send Emails";
			this.btnSend.UseVisualStyleBackColor = true;
			this.btnSend.Click += new System.EventHandler(this.OnClick);
			// worker
			this.worker.WorkerReportsProgress = true;
			this.worker.DoWork += new System.ComponentModel.DoWorkEventHandler(this.OnDoWork);
			this.worker.ProgressChanged += new System.ComponentModel.ProgressChangedEventHandler(this.OnProgressChanged);
			// progressBar1
			this.progressBar1.Location = new System.Drawing.Point(12, 150);
			this.progressBar1.Name = "progressBar1";
			this.progressBar1.Size = new System.Drawing.Size(264, 23);
			this.progressBar1.TabIndex = 2;
			// label1
			this.label1.AutoSize = true;
			this.label1.BackColor = System.Drawing.Color.Transparent;
			this.label1.Location = new System.Drawing.Point(12, 176);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(35, 13);
			this.label1.TabIndex = 3;
			this.label1.Text = "label1";
			// Form1
			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
			this.ClientSize = new System.Drawing.Size(288, 262);
			this.Name = "Form1";
			this.Text = "Form1";



		private System.Windows.Forms.Button btnSend;
		private System.ComponentModel.BackgroundWorker worker;
		private System.Windows.Forms.ProgressBar progressBar1;
		private System.Windows.Forms.Label label1;


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Sample of produced output -Capture.JPGCapture.JPG

Author Closing Comment

by:Jatin Nahar
ID: 40579159

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