c#执行并行任务之Parallel与TaskFactory

本文转载自 http://www.cnblogs.com/icyJ/p/Parallel_TaskFactory.html

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Barrier _bar;
int _maxLength = 20, _maxChannel = 2;//同时最多2条通道，每条通道最多20个数据
bool _isCancel = false;
private void btnWrite_Click(object sender, EventArgs e)
{
    var tmpEmails = _emails.Where(x => !x.Value).Select(x => x.Key).ToList();
    var state = 0;

    _isCancel = false;
    SetControlEnable(false);
    lblProgress.Text = "* 已完成 0%";
    var channels = (tmpEmails.Count / _maxLength) + ((tmpEmails.Count % _maxLength > 0) ? 1 : 0);//总共多少条通道

    var times = (channels / _maxChannel) + ((channels % _maxChannel > 0) ? 1 : 0);//单服务器分多次
    new Action(() =>
    {
        for (int j = 0; j < times; j++)
        {
            if (_isCancel)
            {
                MessageBox.Show("任务取消！");
                break;
            }
            var currChannel = Math.Min(_maxChannel, (channels - j * _maxChannel));//两者取其小的
            _bar = new Barrier(currChannel);//根据次数设置栅栏
            var tasks = new Action[currChannel];
            for (int i = 0; i < currChannel; i++)
            {
                var subData = tmpEmails.Skip((i + j * _maxChannel) * _maxLength).Take(_maxLength).ToList();
                tasks[i] = () =>
                {
                    if (_isCancel) return;
                    var resMsg = 0;
                    Connect2WCF.RunSync(sc => resMsg = sc.UpdateMailState(subData, state));
                    if (resMsg == -1)
                        MessageBox.Show("保存失败了？详情可以查数据库日志表");
                    else if (resMsg == 0)
                        subData.ForEach(one => _emails[one] = true);//标记已经完成的。
                    new Action(() => txtEmails.Text = string.Join("
", _emails.Where(x => !x.Value).Select(x => x.Key))).InvokeRun(this);
                    _bar.SignalAndWait();
                };
            }
            Parallel.Invoke(tasks);
            new Action(() => lblProgress.Text = "* 已完成 " + ((100 * (j + 1) / times)) + "%").InvokeRun(this);
        }
        new Action(() => SetControlEnable(true)).InvokeRun(this);
    }).RunThread();
}

CancellationTokenSource cts = new CancellationTokenSource();
int maxLength = 20, maxChannel = 2;//同时最多2条通道，每条通道最多20个数据
private void btnWrite_Click(object sender, EventArgs e)
{
    cts = new CancellationTokenSource();
    var tmpEmails = _emails.Where(x => !x.Value).Select(x => x.Key).ToList();
    var state = 0;

    SetControlEnable(false);
    lblProgress.Text = "* 已完成 0%";
    var channels = (tmpEmails.Count / maxLength) + ((tmpEmails.Count % maxLength > 0) ? 1 : 0);//总共多少条通道

    var times = (channels / maxChannel) + ((channels % maxChannel > 0) ? 1 : 0);//单服务器分多次
    Action<List<string>, CancellationToken> doSave = (data, ct) =>
    {
        if (ct.IsCancellationRequested) return;
        var msg = 0;
        Connect2WCF.RunSync(sc => msg = sc.UpdateMailState(data, state));
        if (msg == -1)
            MessageBox.Show("保存失败了？详情可以查数据库日志表");
        else if (msg == 0)
            data.ForEach(one => _emails[one] = true);//标记已经完成的。
        new Action(() => txtEmails.Text = string.Join("
", _emails.Where(x => !x.Value).Select(x => x.Key))).InvokeRun(this);
    };

    for (int j = 0; j < times; j++)
    {
        int k = j;
        if (cts.Token.IsCancellationRequested)
        {
            MessageBox.Show("任务取消！");
            break;
        }
        var currChannel = Math.Min(maxChannel, (channels - j * maxChannel));//两者取其小的

        TaskFactory taskFactory = new TaskFactory();
        Task[] tasks = new Task[currChannel];
        for (int i = 0; i < currChannel; i++)
        {
            var subData = tmpEmails.Skip((i + j * maxChannel) * maxLength).Take(maxLength).ToList();
            tasks[i] = new Task(() => doSave(subData, cts.Token), cts.Token);
        }
        taskFactory.ContinueWhenAll(tasks,
            x => new Action(() => lblProgress.Text = "* 已完成 " + ((100 * (k + 1) / times)) + "%").InvokeRun(this), CancellationToken.None);
        Array.ForEach(tasks, x => x.Start());
    }
    SetControlEnable(true);
}

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 EntityDataService.Entity;
using PurchaseSystem.Component;
using System.Threading;
using System.Threading.Tasks;

namespace CaiGou
{
    delegate void DelegateSetText(bool val);
    delegate void DelegateJinDuInfo(int jd, string val);
    delegate void DelegateMessage(string val);
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        List<IEntityData> aSLApprovalDataList = null;
        List<IEntityData> approvalGroupList = null;
        IEntityData detailApprovalData = null;
        IEntityData expenseShareApprovalData = null;
        Dictionary<string, object> dict = null;
        FlowProcess fp = new FlowProcess();
        PurchaseApplyApproval2 pa = new PurchaseApplyApproval2();
        private void button1_Click(object sender, EventArgs e)
        {
            SetText(false);
            string guid = txtNo.Text.Trim();
            if (string.IsNullOrEmpty(guid))
            {
                SetText(true);
                return;
            }

            if (rbNo.Checked)
            {
                guid = pa.GetPurchaseApplyIdByCode(guid);
            }
            if (string.IsNullOrEmpty(guid))
            {
                SetText(true);
                return;
            }
            pgbJd.Value = 0;
            Guid purchaseApplyId = Guid.Parse(guid);

            if (rbCaigou.Checked)
            {
                pa.GetApprovalFlow2(purchaseApplyId, ref aSLApprovalDataList, ref approvalGroupList,
                    ref detailApprovalData, ref expenseShareApprovalData, ref dict);
                string json = Parse.DictionaryToJson(dict);
                txtResult.Text = json;
                pgbJd.Value = 50;
                fp.CaiGouFlow(FlowProcessType.CaiGou, purchaseApplyId, aSLApprovalDataList, approvalGroupList,
                    detailApprovalData, expenseShareApprovalData, json);
                SetText(true);
            }
            else
            {
                pa.GetApprovalFlow3(purchaseApplyId, ref aSLApprovalDataList, ref approvalGroupList,
                    ref detailApprovalData, ref expenseShareApprovalData, ref dict);
                string json = Parse.DictionaryToJson(dict);
                txtResult.Text = json;
                pgbJd.Value = 50;
                fp.CaiGouFlow(FlowProcessType.YingFu, purchaseApplyId, aSLApprovalDataList, approvalGroupList,
                    detailApprovalData, expenseShareApprovalData, json);
                SetText(true);
            }
            pgbJd.Value = 100;
        }

        int _maxLength = 20, _maxChannel = 2;//同时最多2条通道，每条通道最多20个数据
        bool _isCancel = false;

        private void Write(Guid purchaseApplyId)
        {
            if (rbCaigou.Checked)
            {
                pa.GetApprovalFlow2(purchaseApplyId, ref aSLApprovalDataList, ref approvalGroupList,
                    ref detailApprovalData, ref expenseShareApprovalData, ref dict);
                string json = Parse.DictionaryToJson(dict);

                fp.CaiGouFlow(FlowProcessType.CaiGou, purchaseApplyId, aSLApprovalDataList, approvalGroupList,
                    detailApprovalData, expenseShareApprovalData, json);
            }
            else
            {
                pa.GetApprovalFlow3(purchaseApplyId, ref aSLApprovalDataList, ref approvalGroupList,
                    ref detailApprovalData, ref expenseShareApprovalData, ref dict);
                string json = Parse.DictionaryToJson(dict);

                fp.CaiGouFlow(FlowProcessType.YingFu, purchaseApplyId, aSLApprovalDataList, approvalGroupList,
                    detailApprovalData, expenseShareApprovalData, json);
            }
        }

        private void btnAll_Click(object sender, EventArgs e)
        {
            Thread th = new Thread(new ThreadStart(LoadAll));
            th.Start();
        }


        private void LoadAll()
        {
            QiYongBut(false);
            List<IEntityData> tmpEmails;

            if (rbCaigou.Checked)
            {
                tmpEmails = pa.GetPurchaseApplyByAT(1);
            }
            else
            {
                tmpEmails = pa.GetPurchaseApplyByAT(2);
            }


            ////////////////////////////////////////////////////////////////////////////////////

            int jd = 0;
            if (tmpEmails != null && tmpEmails.Count > 0)
            {
                /*
                for (int i = 0, l = tmpEmails.Count; i < l; i++)
                {
                    Write(tmpEmails[i].GetValue<Guid>("PurchaseApplyId"));
                    jd = 1 / l * i;
                    pgbJd.Value = jd;
                    lbJd.Text = "* 已完成 " + jd.ToString() + "%";
                }
                */
                _isCancel = false;
                SetJinDuInfo(jd, "* 已完成 0%");
                var channels = (tmpEmails.Count / _maxLength) + ((tmpEmails.Count % _maxLength > 0) ? 1 : 0);//总共多少条通道

                var times = (channels / _maxChannel) + ((channels % _maxChannel > 0) ? 1 : 0);//单服务器分多次
                new Action(() =>
                {
                    for (int j = 0; j < times; j++)
                    {
                        if (_isCancel)
                        {
                            MessageBox.Show("任务取消！");
                            break;
                        }
                        var currChannel = Math.Min(_maxChannel, (channels - j * _maxChannel));//两者取其小的

                        var tasks = new Action[currChannel];
                        for (int i = 0; i < currChannel; i++)
                        {
                            var subData = tmpEmails.Skip((i + j * _maxChannel) * _maxLength).Take(_maxLength).ToList();
                            tasks[i] = () =>
                            {
                                if (_isCancel)
                                {
                                    return;
                                }
                                new Action(() => { foreach (var item in subData) { Write(item.GetValue<Guid>("PurchaseApplyId")); } }).Invoke();

                            };
                        }
                        Parallel.Invoke(tasks);
                        new Action(() =>
                        {
                            jd = ((100 * (j + 1) / times));
                            SetJinDuInfo(jd, string.Format("* 已完成 {0}%", jd.ToString()));
                        }).Invoke();
                    }
                    new Action(() =>
                    {
                        QiYongBut(true);
                        pgbJd.Value = 100;
                    }).Invoke();
                }).Invoke();
                ////////////////////////////////////////////////////////////////////////////////////

                /*
                List<Task> listTask = new List<Task>();
                foreach (var item in tmpEmails)
                {
                    item.GetValue<Guid>("PurchaseApplyId");
                    //listTask.Add(new Task((a)=>Write(a),
                }

                TaskFactory taskFactory = new TaskFactory();
                */
            }
            QiYongBut(true);
        }

        private void SetJinDuInfo(int jd, string val)
        {
            DelegateJinDuInfo djd = new DelegateJinDuInfo(SetJD);
            btnAll.Invoke(djd, jd, val);
        }

        private void SetJD(int jd, string val)
        {
            pgbJd.Value = jd;
            lbJd.Text = val;
            if (jd >= 100)
            {
                MessageBox.Show("恭喜您信息已采集完成O(∩_∩)O~", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        private void QiYongBut(bool val)
        {
            DelegateSetText dst = new DelegateSetText(SetText);
            btnAll.Invoke(dst, val);
        }

        private void SetText(bool val)
        {
            button1.Enabled = txtNo.Enabled = txtResult.Enabled = rbCaigou.Enabled = rbGId.Enabled = rbNo.Enabled = rbYingfu.Enabled = btnAll.Enabled = val;
        }

    }
}