我是C#和.Net的新手。我的老板让我使用Web服务使用异步回调创建一个计时器。我实际上创建了它,并让它工作,但每当我关闭控制台应用程序窗口时,Web服务仍在运行。当我重新运行应用程序时,它从0开始计数器,但是来回跳转到前一次运行的数字(仍然在记忆中)。
mainMethod()每10秒将数字增加1,monitorMethod()读取该数字,并返回一个字符串。
如何在每次关闭控制台窗口时停止Web服务并将计数器重置为0?
我希望这是有道理的!提前谢谢!
这是我的代码。
网络服务:
public class Service1 : System.Web.Services.WebService
{
private int iTotal;
private int iCurrent;
[WebMethod]
public void mainMethod()
{
iTotal = 42;
iCurrent = 1;
Application["iTotal"] = iTotal;
Application["iCurrent"] = iCurrent;
// sleep 10 seconds
while (iCurrent <= iTotal)
{
Application["iCurrent"] = iCurrent;
iCurrent++;
System.Threading.Thread.Sleep(10000);
}
}
[WebMethod]
public string monitorMethod()
{
iCurrent = int.Parse(Application["iCurrent"].ToString());
iTotal = int.Parse(Application["iTotal"].ToString());
if (iCurrent <= iTotal)
{
return iCurrent + " of " + iTotal;
}
else
return "DONE";
}
}
}
客户端
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Service1 client = new Service1(); //web service proxy
client.mainMethodCompleted += new mainMethodCompletedEventHandler(client_mainMethodCompleted);
if (Session["value"] == null)
{
Session["value"] = true;
}
if (!IsPostBack)
{
client.BeginmainMethod(AsyncCallback, null);
string scriptFunction = "<script type=\"text/javascript\">function reSubmit(){ document.getElementById(\"" + btnProcessNext.ClientID + "\").click(); }</script>";
this.RegisterClientScriptBlock("s1", scriptFunction);
string script = "<script type=\"text/javascript\">setTimeout(\"reSubmit()\", 500);</script>";
this.RegisterStartupScript("submit", script);
}
else
{
if (StringParseByMe(lblStatus.Text))
{
string scriptFunction = "<script type=\"text/javascript\">function reSubmit(){ document.getElementById(\"" + btnProcessNext.ClientID + "\").click(); }</script>";
this.RegisterClientScriptBlock("s1", scriptFunction);
string script = "<script type=\"text/javascript\">setTimeout(\"reSubmit()\", 500);</script>";
this.RegisterStartupScript("submit", script);
}
else
return;
}
}
protected void btnProcessNext_Click(object sender, EventArgs e)
{
Service1 client = new Service1();
string label = client.monitorMethod();
Session["value"] = StringParseByMe(label);
lblStatus.Text = label;
}
private bool StringParseByMe(string sparse)
{
if (sparse == "DONE")
return false;
string[] sparseArray = sparse.Split(' ');
if (int.Parse(sparseArray[0]) == int.Parse(sparseArray[2]))
{
return false;
}
else
return true;
}
void client_mainMethodCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
{
Service1 client = new Service1();
client.EndmainMethod(ar);
}
public void AsyncCallback(IAsyncResult ar)
{
}
}
}
网页
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<h2>
Counter</h2>
<br /><br /><br /><br /><br /><br />
<asp:Label ID="lblStatus" runat="server" Text="0 of -1" Font-Bold="True"
Font-Size="XX-Large" ForeColor="#CC0000"></asp:Label>
<br /><br /><br /><br />
<asp:Button ID="btnProcessNext" runat="server" Text="Refresh"
onclick="btnProcessNext_Click" />
</asp:Content>
答案 0 :(得分:1)
您可以在页面上放置一个按钮,并在按钮的单击事件中编写停止计时器的逻辑。之后,生成一个脚本来关闭窗口。
答案 1 :(得分:1)
即使您的客户端被终止,对mainMethod()的异步调用仍在进行中。 Web服务不知道客户端已经消失并继续运行。
通过启动第二个客户端,您的代码再次调用mainMethod(),现在正在运行两个实例。两者都试图更新应用程序的iTotal和iCurrent值。这就是数字来回反弹的原因。
您需要告诉其中一个mainMethod()线程停止更新Application值并终止。
所以, 有多种方法可以做到这一点,但一种简单的方法可能是这样的:
[WebMethod]
public void mainMethod()
{
iTotal = 42;
iCurrent = 1;
int iReference = (int)(Application["iReference"] ?? 0);
++iReference;
Application["iReference"] = iReference;
Application["iTotal"] = iTotal;
while( (iCurrent <= iTotal) && ((int)(Application["iReference"]) == iReference) )
{
Application["iCurrent"] = iCurrent;
++iCurrent;
System.Threading.Thread.Sleep( 10000 );
}
}
答案 2 :(得分:0)
IIS工作进程可能仍在运行。你需要杀死正在运行的w3wp.exe。