第一次写博客，如有错误，请大家及时告知，本人立即改之。
如果您有好的想法或者建议，我随时与我联系。
如果发现代码有误导时，请与我联系，我立即改之。
好了不多说，直接贴代码。
一般的错误，使用下面三个就可以了。我不太赞同项目里面大量使用try｛｝catch｛｝(释放资源除外)
// 设置ui线程发生异常时处理函数 system.windows.application.current.dispatcherunhandledexception += app_dispatcherunhandledexception; // 设置非ui线程发生异常时处理函数 appdomain.currentdomain.unhandledexception += app_currentdomainunhandledexception; // 设置托管代码异步线程发生异常时处理函数 taskscheduler.unobservedtaskexception += eventhandler_unobservedtaskexception;
特殊情况下，此函数可检测到c++封装的dll(不是百分之百可以检测到)
public delegate int callback(ref long a);
callback mycall;
[dllimport("kernel32")]
private static extern int32 setunhandledexceptionfilter(callback cb);
// 设置非托管代码发生异常时处理函数
callback = new callback(exceptionfilter);
setunhandledexceptionfilter(callback);
此函数可让程序”美化”结束。
完整代码：
public partial class app : application
{
[system.runtime.interopservices.dllimport("kernel32")]
private static extern int32 setunhandledexceptionfilter(callback cb);
private delegate int callback(ref long a);
private callback callback;
private system.threading.mutex mutex;
public app()
{
startup += new system.windows.startupeventhandler(app_startup);
}
private void app_startup(object sender, system.windows.startupeventargs e)
{
mutex = new system.threading.mutex(true, $"{system.reflection.assembly.getentryassembly().getname().name} - 8f6f0ac4-b9a1-45fd-a8cf-72f04e6bde8f", out bool ret);
if (!ret)
{
system.windows.messagebox.show($"{system.reflection.assembly.getentryassembly().getname().name} has already started up.",
"app_startup",
system.windows.messageboxbutton.ok,
system.windows.messageboximage.information);
environment.exit(0);
return;
}
log4net.init(typeof(mainwindow));
// 设置ui线程发生异常时处理函数
system.windows.application.current.dispatcherunhandledexception += app_dispatcherunhandledexception;
// 设置非ui线程发生异常时处理函数
appdomain.currentdomain.unhandledexception += app_currentdomainunhandledexception;
// 设置非托管代码发生异常时处理函数
callback = new callback(exceptionfilter);
setunhandledexceptionfilter(callback);
// 设置托管代码异步线程发生异常时处理函数
taskscheduler.unobservedtaskexception += eventhandler_unobservedtaskexception;
}
void app_dispatcherunhandledexception(object sender, system.windows.threading.dispatcherunhandledexceptioneventargs e)
{
log4net.glogger.error("--<app_dispatcherunhandledexception>--" + e.exception.tostring());
system.windows.forms.messagebox.show(e.exception.tostring(),
"error",
system.windows.forms.messageboxbuttons.ok,
system.windows.forms.messageboxicon.error);
e.handled = true;
}
void app_currentdomainunhandledexception(object sender, unhandledexceptioneventargs e)
{
log4net.glogger.fatal("--<app_currentdomainunhandledexception>--" + e.exceptionobject.tostring());
if (system.windows.forms.dialogresult.yes
== system.windows.forms.messagebox.show(
"软件出现不可恢复错误，即将关闭。是否选择生成dump文件以供开发人员分析问题？",
"error", system.windows.forms.messageboxbuttons.yesno,
system.windows.forms.messageboxicon.error, system.windows.forms.messageboxdefaultbutton.button1))
{
writedump();
}
environment.exit(0);
}
private int exceptionfilter(ref long a)
{
log4net.glogger.fatal("--<exceptionfilter>--" + environment.stacktrace);
writedump();
return 1;
}
private void writedump()
{
dump.writedumpfile();
}
}
对于一些问题，我们可以通过日志文件记录(我目前使用log4net)。有时候日志不能完全帮助我们找到问题所在，这时dmp文件就可以帮助到我们。
internal class dumpwriter
{
public enum minidumptype
{
none = 0x00010000,
normal = 0x00000000,
withdatasegs = 0x00000001,
withfullmemory = 0x00000002,
withhandledata = 0x00000004,
filtermemory = 0x00000008,
scanmemory = 0x00000010,
withunloadedmodules = 0x00000020,
withindirectlyreferencedmemory = 0x00000040,
filtermodulepaths = 0x00000080,
withprocessthreaddata = 0x00000100,
withprivatereadwritememory = 0x00000200,
withoutoptionaldata = 0x00000400,
withfullmemoryinfo = 0x00000800,
withthreadinfo = 0x00001000,
withcodesegs = 0x00002000
}
[dllimport("dbghelp.dll")]
private static extern bool minidumpwritedump(
intptr hprocess,
int32 processid,
intptr filehandle,
minidumptype dumptype,
ref minidumpexceptioninformation excepinfo,
intptr userinfo,
intptr extinfo);
[dllimport("dbghelp.dll")]
private static extern bool minidumpwritedump(
intptr hprocess,
int32 processid,
intptr filehandle,
minidumptype dumptype,
intptr excepparam,
intptr userinfo,
intptr extinfo);
[structlayout(layoutkind.sequential, pack = 4)]// pack=4 is important! so it works also for x64!
private struct minidumpexceptioninformation
{
public uint threadid;
public intptr exceptionpointers;
[marshalas(unmanagedtype.bool)]
public bool clientpointers;
}
[dllimport("kernel32.dll")]
private static extern uint getcurrentthreadid();
private bool writedump(string dmppath, minidumptype dmptype)
{
using (filestream stream = new filestream(dmppath, filemode.create))
{
//取得进程信息
process process = process.getcurrentprocess();
minidumpexceptioninformation mei = new minidumpexceptioninformation();
mei.threadid = getcurrentthreadid();
mei.exceptionpointers = marshal.getexceptionpointers();
mei.clientpointers = true;
bool res = false;
//如果不使用minidumpwritedump重载函数
//当mei.exceptioonpointers == intptr.zero => 无法保存dmp文件
//且当mei.clientpointers == false时程序直接崩溃(mei.clientpointers == true程序不崩溃)
//
//以上测试信息硬件环境 cpu pentium(r) dual-core cpu t4200 @ 2.00ghz
// vs2013update5
//在公司服务器上测试(64位系统、vs2013)不会出现上述情况
/*res = minidumpwritedump(
process.handle,
process.id,
stream.safefilehandle.dangerousgethandle(),
dmptype,
ref mei,
intptr.zero,
intptr.zero);*/
if (mei.exceptionpointers == intptr.zero)
{
res = minidumpwritedump(
process.handle,
process.id,
stream.safefilehandle.dangerousgethandle(),
dmptype,
intptr.zero,
intptr.zero,
intptr.zero);
}
else
{
res = minidumpwritedump(
process.handle,
process.id,
stream.safefilehandle.dangerousgethandle(),
dmptype,
ref mei,
intptr.zero,
intptr.zero);
}
return res;
}
}
public dumpwriter()
{
filepath = environment.currentdirectory + @"\dump";
if (!directory.exists(filepath))
directory.createdirectory(filepath);
}
/// <summary>
/// 保存dmp文件路径
/// </summary>
public string filepath { get; protected set; }
/// <summary>
/// 保存dmp文件名称(包括路径)
/// </summary>
public string filename { get; protected set; }
/// <summary>
/// 写dmp文件
/// </summary>
/// <param name="dmptype">参数，不同参数保存内容不一样</param>
/// <returns></returns>
public bool writedumpfile(minidumptype dmptype)
{
filename = string.format("{0}\\{1}_{2}.dmp",
filepath,
datetime.now.tostring("yyyy-mm-dd-hh-mm-ss-fff"),
process.getcurrentprocess().processname);
return writedump(filename, dmptype);
}
}
好了，就写这么多吧。一般情况下，这些应该可以帮助我们解决大部分问题了。
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