C# 带有System.Threading.Timer的Datagridview

这个问题导致程序运行了几分钟。在使用

System.Timers.Timer

之前，我没有发现问题，直到我改为

System.Threading.Timer

我想知道

这个问题的根本原因是什么

A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll
    System.Transactions Critical: 0 : <TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Critical"><TraceIdentifier>http://msdn.microsoft.com/TraceCodes/System/ActivityTracing/2004/07/Reliability/Exception/Unhandled</TraceIdentifier><Description>Unhandled exception</Description><AppDomain>InternetCafe.vshost.exe</AppDomain><Exception><ExceptionType>System.InvalidOperationException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType><Message>BindingSource cannot be its own data source. Do not set the DataSource and DataMember properties to values that refer back to BindingSource.</Message><StackTrace>   at System.Windows.Forms.BindingSource.get_Count()
       at System.Windows.Forms.CurrencyManager.get_Count()
       at System.Windows.Forms.DataGridView.DataGridViewDataConnection.currencyManager_ListChanged(Object sender, ListChangedEventArgs e)
       at System.Windows.Forms.CurrencyManager.OnListChanged(ListChangedEventArgs e)
       at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e)
       at System.Windows.Forms.BindingSource.OnListChanged(ListChangedEventArgs e)
       at System.Windows.Forms.BindingSource.InnerList_ListChanged(Object sender, ListChangedEventArgs e)
       at System.ComponentModel.BindingList`1.OnListChanged(ListChangedEventArgs e)
       at System.ComponentModel.BindingList`1.Child_PropertyChanged(Object sender, PropertyChangedEventArgs e)
       at InternetCafe.Computer.NotifyPropertyChanged(String info) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\Computer.cs:line 163
       at InternetCafe.Computer.UsedTimeValueChanged(Object sender, PropertyChangedEventArgs e) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\Computer.cs:line 149
       at InternetCafe.TimerManager.OnTimeChanged(PropertyChangedEventArgs e) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 62
       at InternetCafe.TimerManager.set_TimeSinceStartTime(TimeSpan value) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 30
       at InternetCafe.TimerManager.tmrThreadingTimer_TimerCallback(Object state) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 50
       at System.Threading._TimerCallback.TimerCallback_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading._TimerCallback.PerformTimerCallback(Object state)</StackTrace><ExceptionString>System.InvalidOperationException: BindingSource cannot be its own data source. Do not set the DataSource and DataMember properties to values that refer back to BindingSource.
       at System.Windows.Forms.BindingSource.get_Count()
       at System.Windows.Forms.CurrencyManager.get_Count()
       at System.Windows.Forms.DataGridView.DataGridViewDataConnection.currencyManager_ListChanged(Object sender, ListChangedEventArgs e)
       at System.Windows.Forms.CurrencyManager.OnListChanged(ListChangedEventArgs e)
       at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e)
       at System.Windows.Forms.BindingSource.OnListChanged(ListChangedEventArgs e)
       at System.Windows.Forms.BindingSource.InnerList_ListChanged(Object sender, ListChangedEventArgs e)
       at System.ComponentModel.BindingList`1.OnListChanged(ListChangedEventArgs e)
       at System.ComponentModel.BindingList`1.Child_PropertyChanged(Object sender, PropertyChangedEventArgs e)
       at InternetCafe.Computer.NotifyPropertyChanged(String info) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\Computer.cs:line 163
       at InternetCafe.Computer.UsedTimeValueChanged(Object sender, PropertyChangedEventArgs e) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\Computer.cs:line 149
       at InternetCafe.TimerManager.OnTimeChanged(PropertyChangedEventArgs e) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 62
       at InternetCafe.TimerManager.set_TimeSinceStartTime(TimeSpan value) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 30
       at InternetCafe.TimerManager.tmrThreadingTimer_TimerCallback(Object state) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 50
       at System.Threading._TimerCallback.TimerCallback_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading._TimerCallback.PerformTimerCallback(Object state)</ExceptionString></Exception></TraceRecord>

如何解决这个问题

A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll
    System.Transactions Critical: 0 : <TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Critical"><TraceIdentifier>http://msdn.microsoft.com/TraceCodes/System/ActivityTracing/2004/07/Reliability/Exception/Unhandled</TraceIdentifier><Description>Unhandled exception</Description><AppDomain>InternetCafe.vshost.exe</AppDomain><Exception><ExceptionType>System.InvalidOperationException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType><Message>BindingSource cannot be its own data source. Do not set the DataSource and DataMember properties to values that refer back to BindingSource.</Message><StackTrace>   at System.Windows.Forms.BindingSource.get_Count()
       at System.Windows.Forms.CurrencyManager.get_Count()
       at System.Windows.Forms.DataGridView.DataGridViewDataConnection.currencyManager_ListChanged(Object sender, ListChangedEventArgs e)
       at System.Windows.Forms.CurrencyManager.OnListChanged(ListChangedEventArgs e)
       at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e)
       at System.Windows.Forms.BindingSource.OnListChanged(ListChangedEventArgs e)
       at System.Windows.Forms.BindingSource.InnerList_ListChanged(Object sender, ListChangedEventArgs e)
       at System.ComponentModel.BindingList`1.OnListChanged(ListChangedEventArgs e)
       at System.ComponentModel.BindingList`1.Child_PropertyChanged(Object sender, PropertyChangedEventArgs e)
       at InternetCafe.Computer.NotifyPropertyChanged(String info) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\Computer.cs:line 163
       at InternetCafe.Computer.UsedTimeValueChanged(Object sender, PropertyChangedEventArgs e) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\Computer.cs:line 149
       at InternetCafe.TimerManager.OnTimeChanged(PropertyChangedEventArgs e) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 62
       at InternetCafe.TimerManager.set_TimeSinceStartTime(TimeSpan value) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 30
       at InternetCafe.TimerManager.tmrThreadingTimer_TimerCallback(Object state) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 50
       at System.Threading._TimerCallback.TimerCallback_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading._TimerCallback.PerformTimerCallback(Object state)</StackTrace><ExceptionString>System.InvalidOperationException: BindingSource cannot be its own data source. Do not set the DataSource and DataMember properties to values that refer back to BindingSource.
       at System.Windows.Forms.BindingSource.get_Count()
       at System.Windows.Forms.CurrencyManager.get_Count()
       at System.Windows.Forms.DataGridView.DataGridViewDataConnection.currencyManager_ListChanged(Object sender, ListChangedEventArgs e)
       at System.Windows.Forms.CurrencyManager.OnListChanged(ListChangedEventArgs e)
       at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e)
       at System.Windows.Forms.BindingSource.OnListChanged(ListChangedEventArgs e)
       at System.Windows.Forms.BindingSource.InnerList_ListChanged(Object sender, ListChangedEventArgs e)
       at System.ComponentModel.BindingList`1.OnListChanged(ListChangedEventArgs e)
       at System.ComponentModel.BindingList`1.Child_PropertyChanged(Object sender, PropertyChangedEventArgs e)
       at InternetCafe.Computer.NotifyPropertyChanged(String info) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\Computer.cs:line 163
       at InternetCafe.Computer.UsedTimeValueChanged(Object sender, PropertyChangedEventArgs e) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\Computer.cs:line 149
       at InternetCafe.TimerManager.OnTimeChanged(PropertyChangedEventArgs e) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 62
       at InternetCafe.TimerManager.set_TimeSinceStartTime(TimeSpan value) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 30
       at InternetCafe.TimerManager.tmrThreadingTimer_TimerCallback(Object state) in C:\Users\at0m\Documents\Visual Studio 2010\Projects\InternetCafe\InternetCafe\TimerManager.cs:line 50
       at System.Threading._TimerCallback.TimerCallback_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading._TimerCallback.PerformTimerCallback(Object state)</ExceptionString></Exception></TraceRecord>

TimerManager构造函数

 public TimerManager(frmMainServer main)
    {
        _timer = new System.Threading.Timer(new
                   TimerCallback(tmrThreadingTimer_TimerCallback),
                   null, System.Threading.Timeout.Infinite, 1000);
        _main = main;
    }

即时更改

private void OnTimeChanged(PropertyChangedEventArgs e)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, e);
        }
    }

计时器回调

private void tmrThreadingTimer_TimerCallback(object state)
    {
        TimeSinceStartTime += TimeSpan.FromSeconds(1);
    }

---

计算机类

重要属性

public decimal TotalMoney
    {
        get
        {
            return this.totalMoney;
        }

        set
        {
            if (value != this.totalMoney)
            {
                this.totalMoney = value;
                NotifyPropertyChanged("TotalMoney");
            }
        }
    }

    public TimerManager UsedTime
    {
        get
        {
            return this.usedTimeValue;

        }

        set
        {
            if (value != this.usedTimeValue)
            {
                this.usedTimeValue = value;
                NotifyPropertyChanged("UsedTimeValue");
                usedTimeValue.PropertyChanged += new PropertyChangedEventHandler(UsedTimeValueChanged);       
            }
        }
    }

如果时间发生变化，请计算费用，通知Usedtime和TotalMoney

 private void UsedTimeValueChanged(object sender, PropertyChangedEventArgs e)
   {
       NotifyPropertyChanged("UsedTime");
       this.totalMoney = (decimal)(this.UsedTime.TimeSinceStartTime.Hours * this.session.Member.MemberTariff + this.UsedTime.TimeSinceStartTime.Minutes * (this.session.Member.MemberTariff / 60));
       NotifyPropertyChanged("TotalMoney");
   }

---

主表单

使用dbBindingSource设置CompList gridview数据源，并使用Computers绑定列表设置dbBindingSource数据源

public BindingList<Computer> computers = new BindingList<Computer>();
.
.
.
compList.DataSource = dbBindingSource;
dbBindingSource.DataSource = computers;

public BindingList computers=new BindingList（）；
.
.
.
compList.DataSource=dbBindingSource；
dbBindingSource.DataSource=计算机；

根本原因是您正在更改绑定到UI控件的非UI线程中的数据源。最简单的解决方案是使用始终在UI线程上执行的，但是，它的分辨率或精度不是很高。下一个选项是确保使用或在UI线程上引发PropertyChanged。

如果它与其他计时器一起工作，为什么要更改它？因为当我使用System.Timers.timer并设置为“tmrTimersTimer.SynchronizingObject=this”时，它基于UI线程。如果UI线程冻结，时间将不正确显示。所以我会改为异步定时器。如果我回答不正确，很抱歉我是新来的。：）