c# - 如何让计时器运行 10 分钟然后禁用按钮？

Question

我得到了帮助:http://forum.codecall.net/topic/65434-c-working-with-timers/ (其中使用了递减计数器，但它在我的应用程序中不起作用)

我有一些文本字段和两个按钮:提交和更新。 我已经实现了一个从工具栏到更新按钮的计时器。

我希望这个计时器运行 10 分钟，然后禁用更新按钮。但目前它只运行了 2 分钟。

按钮代码:

<asp:Button ID="Btnsave" runat="server" CssClass="bt3dbuttons" 
    onclick="Btnsave_Click" OnClientClick="return confirm('Data Submitted')" 
    Text="Submit" Width="77px" />

<asp:Timer ID="Timer2" runat="server" ontick="Timer2_Tick">
</asp:Timer>
<asp:Button ID="Butnupdate" runat="server" CssClass="btupbuttons" 
    onclick="Btnupdate_Click" Text="Update" visible="false" Width="85px" />

这是定时器的代码:

private System.Timers.Timer aTimer = new System.Timers.Timer(600000)
                                                { AutoReset = false };
protected void Timer2_Tick(object sender, EventArgs e)
{    
   aTimer = new System.Timers.Timer(600000);
   aTimer.Interval = 600000;
   double counter = aTimer.Interval;

   counter++;
   if (counter >= 600000)
   {    
       Butnupdate.Enabled = false;
       MessageBox.Show("Time Up!");
   }
}

更新按钮代码:

protected void Btnupdate_Click(object sender, EventArgs e) 
{

    string id = Id.Text.Trim();
    string name = Name.Text;
    string project = Project.Text;
    string result = Total.Text;

    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["CM_Connection"].ConnectionString))
    {
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;

        try
        {
            //lets check that the user typed the first number
            if (Viva.Text.Length > 1)
            {
                VivaLabel.Text = "Please enter a valid number to add.";
                return;
            }

            //lets check that the user typed the second number
            else if (Presentation.Text.Length > 1)
            {
                PresentationLabel.Text = "Please enter a valid number to add.";
                return;
            }
            else if (Confidence.Text.Length > 1)
            {
                ConfidenceLabel.Text = "Please enter a valid number to add.";
                return;
            }

            else if (System.Text.Length > 1)
            {
                SystemLabel.Text = "Please enter a valid number to add.";
                return;
            }
            //Now we have valid inputs
            //Lets put them into integer values

            int number1 = int.Parse(Viva.Text);
            int number2 = int.Parse(Presentation.Text);
            int number3 = int.Parse(Confidence.Text);
            int number4 = int.Parse(System.Text);
            //Now lets add the numbers
            int total = number1 + number2 + number3 + number4;

            //lets place it into the TextBox3
            Total.Text = total.ToString();

            //  cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandText = @"UPDATE Result SET Name = @name, Project = @project, Result = @result WHERE ID = @id";
            con.Open();

            cmd.Parameters.AddWithValue("@id", Id.Text.ToString());
            cmd.Parameters.AddWithValue("@name ", Name.Text.ToString());
            cmd.Parameters.AddWithValue("@project ", Project.Text.ToString());
            cmd.Parameters.AddWithValue("@result ", Total.Text.ToString());
            cmd.ExecuteNonQuery();
        }

        catch (Exception ex1)
        {
            //Report error to user in the bottom Label
            MessageBox.Show(ex1.Message);
        }
    }
}

Answer 1

使用此代码作为指南

public class Timer1
{
    private static System.Timers.Timer aTimer;

    public static void Main()
    {
        // Create a timer with a ten second interval.
        aTimer = new System.Timers.Timer(600000);

        // Hook up the Elapsed event for the timer.
        aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);

        // Set the Interval to 10 minutes 
        aTimer.Interval = 600000;
        aTimer.Enabled = true;

        Console.WriteLine("Press the Enter key to exit the program.");
        Console.ReadLine();

        // If the timer is declared in a long-running method, use 
        // KeepAlive to prevent garbage collection from occurring 
        // before the method ends. 
        GC.KeepAlive(aTimer);
    }

    // Specify what you want to happen when the Elapsed event is  
    // raised. 
    private static void OnTimedEvent(object source, ElapsedEventArgs e)
    {
        Butnupdate.Enabled = false;
        MessageBox.Show("Time Up!");
    }
}

示例取自

http://msdn.microsoft.com/en-us/library/system.timers.timer.aspx