重复在C＃中的函数，直到它不再抛出一个异常 [英] Repeating a function in C# until it no longer throws an exception

问题描述

我有一个调用SOAP接口，并获取数据数组后面的类。但是，如果此请求超时，它抛出一个异常。这是好事。不过，我想我的程序试图再次拨打这个电话。如果超时，我想它继续做这个调用，直到成功为止。我怎样才能做到这一点。

例如：

 试
 {
 salesOrdersArray = MagServ.salesOrderList（sessID，过滤器）; 
} 
抓
 {
？善有善报这里给力上面一行代码来重新运行，直到成功为止。 
} 
  

解决方案

您只需要永远循环下去

 ，而（真）
 {
试
 {
 salesOrdersArray = MagServ.salesOrderList（sessID，过滤器）; 
中断; //退出循环。可以从该方法返回，在它做什么... 
} $ b。根据
 // $ B抓
 {
 //日志，我怀疑... 
} 
} 
  

请注意，你应该几乎可以肯定的不其实永远循环下去。你几乎肯定应该有尝试的最大数量，大概只有捕获的具体的异常。醒目的所有的异常永远的可能是惨不忍睹......想象一下，如果 salesOrderList （非常规的方法名，顺便说一句）抛出 ArgumentNullException ，因为你已经有了一个bug，过滤器为空......你的真正的希望绑100％，你的CPU永远的？

I've got a class that calls a SOAP interface, and gets an array of data back. However, if this request times out, it throws an exception. This is good. However, I want my program to attempt to make this call again. If it times out, I'd like it to keep making this call until it succeeds. How can I accomplish this?

For example:

try
{
   salesOrdersArray = MagServ.salesOrderList(sessID, filter);
}
catch
{
   ?? What Goes Here to FORCE the above line of code to rerun until it succeeds.
}

解决方案

You just need to loop forever:

while (true)
{
    try
    {
        salesOrdersArray = MagServ.salesOrderList(sessID, filter);
        break; // Exit the loop. Could return from the method, depending
               // on what it does...
    }
    catch
    {
        // Log, I suspect...
    }
}

Note that you should almost certainly not actually loop forever. You should almost certainly have a maximum number of attempts, and probably only catch specific exceptions. Catching all exceptions forever could be appalling... imagine if salesOrderList (unconventional method name, btw) throws ArgumentNullException because you've got a bug and filter is null... do you really want to tie up 100% of your CPU forever?

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