Question

如何将sender参数传递给.NET中的system.timers.timer？

timer1[timer] = new System.Timers.Timer(interval);
timer1[timer].AutoReset = true;
timer1[timer].Elapsed += new ElapsedEventHandler(datatransferEvent);
timer1[timer].Start();
GC.KeepAlive(timer1[timer]);


private void timer_Elapsed(object sender, ElapsedEventArgs e)
{
    try
    {
        serverreconnected.Stop();
        reconnect(_opcServer);
    }
    finally
    {
        serverreconnected.Start();
    }
}

示例：

System.Threading.Timer timer1;
timer1= new System.Threading.Timer(databaseTrensfer, row, dueTime, interval);

public void databaseTrensfer(object row)
{
    DataRow rowE = (DataRow)row;
}

行传递给函数databaseTrensfer()

的参数

我想将sender参数传递给事件。

提前致谢。

Answer 1

我喜欢zabulus的方法，但还有另一种选择。创建自己的Timer类，它继承自System.Timers.Timer，它可以保存你想要的任何东西。我选择了基本对象Tag属性，因此可以在其他项目中重复使用。

public class MyTimer : System.Timers.Timer
{
    public MyTimer(double interval)
        : base(interval)
    {
    }

    public object Tag { get; set; }
}

MyTimer timer;
void test(object sender)
{
    timer = new MyTimer(1);
    timer.Tag = sender;
    timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
}

void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
    MyTimer timer = (MyTimer)sender;
    object tag = timer.Tag;
    // do whatever you want with tag
}

然后拨打test(with whatever value you want to pass)。

Answer 2

创建保存行的聚合类。

class RowHolderEventArgs : EventArgs
{
    public DataRow row;
    public RowHolderEventArgs(DataRow row)
    {
        this.row = row;
    }
};
public delegate void RowHolderEvent(object sender, RowHolderEventArgs e);
class RowHolder
{
    public event RowHolderEvent Elapsed;
    DataRow row;
    public RowHolder(DataRow row, Timer timer)
    {
        this.row = row;
        timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
    }

    void timer_Elapsed(object sender, ElapsedEventArgs e)
    {
        if (this.Elapsed != null)
        {
            Elapsed(sender, new RowHolderEventArgs(row));
        }
    }
}

使用

timer1[timer] = new System.Timers.Timer(interval);
rowHolder[timer] = new RowHolder(timer1[timer],row[timer]);
rowHolder.Elapsed+=new RowHolderEvent(databaseTrensfer)

public void databaseTrensfer(object sender, HolderEventArgs e)
{
 DataRow rowE = (DataRow)e.row;
}

Answer 3

如下：

static Timer timer;

static void Main(string[] args)
{
    var row = default(DataRow); // Some row
    timer = new Timer(30000);
    timer.Elapsed += (_, __) => databaseTrensfer(row);
}

static void databaseTrensfer(DataRow row)
{
    // Do something with 'row'
}

如何将sender参数传递给system.timers.timer

3 个答案: