BeginInvoke抛出异常 [英] BeginInvoke throws exception

问题描述

我有以下问题。 FindRoot实际上是在第三方dll，我没有控制权。 必须通过开始调用调用。有时，FindRoot方法会引发异常。这导致我的整个应用程序崩溃。现在如何防止我的应用程序崩溃，即使FindRoot抛出异常。

I have the following problem. FindRoot is actually in a third party dll and I do not have control over it. It has to be called via Begin invoke. Sometimes, the FindRoot method throws exception. This causes my whole application to crash. Now how do I prevent my application from crashing even if FindRoot throws exception.

delegate void AddRoot(double number);
public static void FindRoot(double number)
{
    throw new Exception();/// sometimes is thrown.

}

static void back_DoWork(object sender, DoWorkEventArgs e)
{
    AddRoot root = FindRoot;
    root.BeginInvoke(12.0, root.EndInvoke, root);

}

推荐答案

使用回调而不是直接调用EndInvoke：

Use a callback instead of directly calling EndInvoke:

using System.Runtime.Remoting.Messaging;
...
static void back_DoWork() 
{
    AddRoot root = FindRoot;
    root.BeginInvoke(12.0, new AsyncCallback(callback), root);
}

static void callback(IAsyncResult result) 
{
    AddRoot dlg = (AddRoot)(((AsyncResult)result).AsyncDelegate);

    try 
    {
        dlg.EndInvoke(result);
    }
    catch (Exception ex) 
    {
        Console.WriteLine(ex.Message);
    }
}

Btw：看起来像我已经在打电话这个代码来自一个后台线程。开始另一个运行FindRoot（）的线程看起来很奇怪。

Btw: it looks to me like you are already calling this code from a background thread. Starting yet another thread to run FindRoot() looks strange.

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