有关进度条的问题

[yuyu46569]

我有个进行算法的程序，在算的过程中有用到进度条。当进行算小数据（几分钟就能算完的那种）的时候进度条是可以正常动的。 当算一种要4个多小时才能算完的数据，进度条就不动了 这是何解？

[兔子-顾问]

描述的不清晰。会不会是进度条的max太大了。改变会很缓慢。尝试放2个进度条。一个表示某一次循环的小操作，另一个表示总的进度，有一个会很快，另一个慢一点。

[lockepeak]

把step设大些

[lockepeak]

判断 设不同的 步进值

[yuyu46569]

[Quote=引用 2 楼 lockepeak 的回复:]
把step设大些
[/Quote]
我设的是100

[jointan]

操作进度条后调用一下窗口的Update方法和Application.DoEvents方法试试

我也有一个软件有这种毛病,单线程的,在单核处理器上没问题,在单核双CPU系统上也没问题,在多核处理器上,和你描述的情况差不多,现在原码不在手上,当时调没调用窗口的Update方法和Application.DoEvents方法我忘记了

[kensouterry]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;
//Remember to add a reference---
using Microsoft.Office.Interop.Word;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        delegate void DisplayValueDele(object o,int progress);
        DisplayValueDele displayValueExecute;

        public Form1()
        {
            InitializeComponent();

            displayValueExecute = new DisplayValueDele(DisplayValueExecute);

            
        }

        public void DisplayValueExecute(object o,int progress)
        {
            ProgressBar pb1 = (ProgressBar)o;
            if (pb1.InvokeRequired)
            {
                IAsyncResult ar=this.BeginInvoke(displayValueExecute, new object[2] { pb1,progress });
                this.EndInvoke(ar);
            }
            else
            {
                progressBar1.Value = progress;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 101; i++)
            {
                displayValueExecute(progressBar1, i);
                Thread.Sleep(50);
            }

        }


    }
}

建议使用BackgroundWorker控件，因为那控件很好控制一个新开的线程。有不懂的参考MSDN

[kensouterry]

Designer代码

namespace WindowsFormsApplication1
{
    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))
            {
                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.progressBar1 = new System.Windows.Forms.ProgressBar();
            this.backgroundWorker1 = new System.ComponentModel.BackgroundWorker();
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // progressBar1
            // 
            this.progressBar1.Location = new System.Drawing.Point(146, 139);
            this.progressBar1.Name = "progressBar1";
            this.progressBar1.Size = new System.Drawing.Size(324, 23);
            this.progressBar1.TabIndex = 0;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(271, 229);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 1;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(652, 420);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.progressBar1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.ProgressBar progressBar1;
        private System.ComponentModel.BackgroundWorker backgroundWorker1;
        private System.Windows.Forms.Button button1;

    }
}