本文介绍了您可以在 C# 代码中捕获本机异常吗?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
在 C# 代码中，您能否捕获从某个非托管库的深处抛出的本机异常?如果是这样，您需要做任何不同的事情来捕捉它还是标准的 try...catch 得到它?
In C# code can you catch a native exception thrown from deep in some unmanaged library? If so do you need to do anything differently to catch it or does a standard try...catch get it?
推荐答案
你可以使用 Win32Exception 并使用其 NativeErrorCode 属性来适当地处理它.
You can use Win32Exception and use its NativeErrorCode property to handle it appropriately.
// http://support.microsoft.com/kb/186550
const int ERROR_FILE_NOT_FOUND = 2;
const int ERROR_ACCESS_DENIED = 5;
const int ERROR_NO_APP_ASSOCIATED = 1155;
void OpenFile(string filePath)
{
Process process = new Process();
try
{
// Calls native application registered for the file type
// This may throw native exception
process.StartInfo.FileName = filePath;
process.StartInfo.Verb = "Open";
process.StartInfo.CreateNoWindow = true;
process.Start();
}
catch (Win32Exception e)
{
if (e.NativeErrorCode == ERROR_FILE_NOT_FOUND ||
e.NativeErrorCode == ERROR_ACCESS_DENIED ||
e.NativeErrorCode == ERROR_NO_APP_ASSOCIATED)
{
MessageBox.Show(this, e.Message, "Error",
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation);
}
}
}
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