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C#多线程异步执行和跨线程访问控件Helper怎么用

发表于:2025-01-19 作者:千家信息网编辑
千家信息网最后更新 2025年01月19日,本文小编为大家详细介绍"C#多线程异步执行和跨线程访问控件Helper怎么用",内容详细,步骤清晰,细节处理妥当,希望这篇"C#多线程异步执行和跨线程访问控件Helper怎么用"文章能帮助大家解决疑惑
千家信息网最后更新 2025年01月19日C#多线程异步执行和跨线程访问控件Helper怎么用

本文小编为大家详细介绍"C#多线程异步执行和跨线程访问控件Helper怎么用",内容详细,步骤清晰,细节处理妥当,希望这篇"C#多线程异步执行和跨线程访问控件Helper怎么用"文章能帮助大家解决疑惑,下面跟着小编的思路慢慢深入,一起来学习新知识吧。

一、工具类代码

    public class TaskHelper    {        #region 多线程操作        ///         /// 功能描述:多线程执行方法,方法无参数,无返回值        ///         /// 方法,如果方法中调用了控件,请使用 ThreadInvokerControl(() => { 您的操作})进行包括        /// 执行完成回调,参数为object,如果错误返回的是Exception,否则为null,如果为空则默认调用基类回调方法        /// 调用线程时禁用的控件        public static void TaskRun(          Form frm,          Func func,          Action callback = null,          Control[] enableControl = null)        {            if (enableControl != null)            {                SetControlEnableds(enableControl, false);            }            Task.Factory.StartNew(() =>            {                try                {                    Task task = func();                    if (task.Exception != null && task.Exception.InnerException != null)                        throw task.Exception.InnerException;                    callback?.Invoke(null);                }                catch (Exception ex)                {                    if (callback != null)                        callback(ex);                    else                        ThreadBaseCallBack(frm, ex);                }                finally                {                    if (enableControl != null && frm != null)                        ThreadInvokerControl(frm, () => { SetControlEnableds(enableControl, true); });                }            });        }        ///         /// 功能描述:线程默认回调方法        ///         public static void ThreadBaseCallBack(Form frm, Exception ex)        {            if (frm != null)            {                ThreadInvokerControl(frm, () =>                {                    try                    {                        Exception lastEx = ex.GetOriginalException();                        MessageBox.Show(lastEx.Message);                    }                    catch                    {                    }                });            }        }        ///         /// 功能描述:委托调用,用于夸线程访问控件        ///         /// action        /// 所在窗体,默认使用当前窗体        public static void ThreadInvokerControl(Form frm, Action action)        {            if (frm != null)            {                if (frm.InvokeRequired)                {                    frm.BeginInvoke(action);                }                else                {                    action();                }            }        }        #endregion        #region 提示层        [DllImport("user32.dll")]        private static extern bool SetForegroundWindow(IntPtr hWnd);        private static void ShowProcessPanel(Control parent, string strMessage)        {            if (parent.InvokeRequired)            {                parent.BeginInvoke(new MethodInvoker(delegate                {                    ShowProcessPanel(parent, strMessage);                }));            }            else            {                parent.VisibleChanged -= new EventHandler(parent_VisibleChanged);                parent.VisibleChanged += new EventHandler(parent_VisibleChanged);                parent.FindForm().FormClosing -= ControlHelper_FormClosing;                parent.FindForm().FormClosing += ControlHelper_FormClosing;                Control control = null;                lock (parent)                {                    control = HaveProcessPanelControl(parent);                    if (control == null)                    {                        control = CreateProgressPanel();                        parent.Controls.Add(control);                    }                }                FWaiting fWaiting = control.Tag as FWaiting;                fWaiting.Message = strMessage;                fWaiting.Show();            }        }        private static void ControlHelper_FormClosing(object sender, FormClosingEventArgs e)        {            Control control = sender as Control;            control.FindForm().FormClosing -= ControlHelper_FormClosing;            CloseWaiting(control);        }        private static void parent_VisibleChanged(object sender, EventArgs e)        {            Control control = sender as Control;            control.VisibleChanged -= new EventHandler(parent_VisibleChanged);            if (!control.Visible)            {                CloseWaiting(control);            }        }        private static void CloseWaiting(Control control)        {            Control[] array = control.Controls.Find("myProgressPanelext", false);            if (array.Length > 0)            {                Control myProgress = array[0];                if (myProgress.Tag != null && myProgress.Tag is FWaiting)                {                    FWaiting fWaiting = myProgress as FWaiting;                    if (fWaiting != null && !fWaiting.IsDisposed && fWaiting.Visible)                    {                        fWaiting.Hide();                    }                }            }        }        private static void CloseProcessPanel(Control parent)        {            if (parent.InvokeRequired)            {                parent.BeginInvoke(new MethodInvoker(delegate                {                    CloseProcessPanel(parent);                }));            }            else if (parent != null)            {                Control control = HaveProcessPanelControl(parent);                if (control != null)                {                    Form frm = control.Tag as Form;                    if (frm != null && !frm.IsDisposed && frm.Visible)                    {                        if (frm.InvokeRequired)                        {                            frm.BeginInvoke(new MethodInvoker(delegate                            {                                frm.Hide();                            }));                        }                        else                        {                            frm.Hide();                        }                    }                }            }        }        private static Control HaveProcessPanelControl(Control parent)        {            Control[] array = parent.Controls.Find("myProgressPanelext", false);            Control result;            if (array.Length > 0)            {                result = array[0];            }            else            {                result = null;            }            return result;        }        private static Control CreateProgressPanel()        {            return new Label            {                Name = "myProgressPanelext",                Visible = false,                Tag = new FWaiting                {                    TopMost = true,                }            };        }        #endregion        #region 禁用控件时不改变空间颜色        [System.Runtime.InteropServices.DllImport("user32.dll ")]        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int wndproc);        [System.Runtime.InteropServices.DllImport("user32.dll ")]        private static extern int GetWindowLong(IntPtr hWnd, int nIndex);        private const int GWL_STYLE = -16;        private const int WS_DISABLED = 0x8000000;        ///         /// 功能描述:设置控件的Enable属性,控件不改颜色        ///         /// c        /// enabled        private static void SetControlEnabled(Control c, bool enabled)        {            if (enabled)            {                SetWindowLong(c.Handle, GWL_STYLE, (~WS_DISABLED) & GetWindowLong(c.Handle, GWL_STYLE));            }            else            {                SetWindowLong(c.Handle, GWL_STYLE, WS_DISABLED + GetWindowLong(c.Handle, GWL_STYLE));            }        }        ///         /// 功能描述:设置多个控件的Enable属性,控件不改颜色        ///         /// cs        /// enabled        private static void SetControlEnableds(Control[] cs, bool enabled)        {            foreach (var c in cs)            {                SetControlEnabled(c, enabled);            }        }        #endregion    }

二、调用代码

            TaskHelper.TaskRun(this, async () =>            {                TaskHelper.ThreadInvokerControl(this, () =>                {                    //夸线程访问控件的                    this.btnStart.Enabled = true;                    this.btnStart.BackColor = Color.Gainsboro;                });            });

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