在C#中捕获内存不足异常

当clr未能分配所需的足够内存时，将发生system.outofmemoryexception。system.outofmemoryexception继承自system.systemexception类。outofmemoryexception使用cor_e_outofmemory值为 0x8007000e的 hresult 。

一个outofmemoryexception异常异常主要有两个原因：

我们试图将stringbuilder对象扩展到超出其stringbuilder.maxcapacity属性定义的长度。

公共语言运行时无法分配足够的连续内存来成功执行操作。任何需要分配内存的属性分配或方法调用都可能引发此异常。

设置字符串-

string studentname = "tom";string studentsubject = "maths";

现在您需要使用分配的容量进行初始化，该容量是初始值的长度-

stringbuilder sbuilder = new stringbuilder(studentname.length, stude教材教法ntname.length);

现在，如果您尝试插入其他值，则会发生异常。

sbuilder.inrt(value: studentsubject, index: studentname.length - 1, count: 1);

发生以下异常-

system.outofmemoryexception: out of memory

要捕获错误，请尝试以下代码-

示例：

 try            {                                string videosavedir = commonhelper.getvideodirectory();                int tcount = 0;                #region 模拟抛出outofmemoryexception用                //list<videoextend> datasource = new list<videoextend>();                //datasource.add(new videoextend() {  ehost="http://www.baidu.com",filename="bai.mp4"});                #endregion                                if (datasource != null)                {                    totalcount = datasource.count;                }                foreach (videoextend video in datasource)                {                    try                    {                        tcount++;                        string filename = video.filename;                        string filefullpath = videosavedir + filename;                        if (file.exists(filefullpath))                        {                            if (!judgefilestatus(filefullpath, filename))                            {                                continue;                            }                            string strfilesize = "";                            if (!filecanupload(filefullpath, out strfilesize))                            {                                //数据库更新为上传南开大学分数线失败，文件太大                                if (mongodata == null)                                {                                    apihelper.updateuploadtoqiniufiletoolarge(video.ehost)behind的反义词;                                }                                el                                {                                    mongodata.updateuploadtoqiniufiletoolarge(video.ehost);                                }                                loghelper.log(logfileprefix+"uploadfiletoolarge", "文件" + filename + "太大，大小为：" + strfilesize);                                continue;                            }                            loghelper.log(logfileprefix + "uploadinfo", "开始上传" + tcount + "/" + totalcount + "文件：" + video.filename);                            string newfilename = "";                            bool updatestatus = qiniuutil.upload(filefullpath, out newfilename);                            if (updatestatus)                            {                                if (mongodata == null)                                {                                    apihelper.updateuploadtoqiniusuccessstatus(video.ehost, newfilename);                                }                                el                           继续教育考试答案     {                                    mongodata.updateuploadtoqiniusuccessstatus(video.ehost, newfilename);//更新数据库                                }                                loghelper.log(logfileprefix + "uploadsuccess", "上传成功，源文件名：" + video.filename + "；新文件名：" + newfilename);                                if (judgefilestatus(filefullpath, filename))                                {                                    try                                    {                                        file.delete(filefullpath);                                    }                                    catch (exception ex) { }                                }                                tcount++;                            }                        }                        el                        {                            //把数据库重置为要重新下载                            if (mongodata == null)                            {                                apihelper.updateuploadtoqiniulocalfilenotfound(video.ehost);                            }                            el                            {                                mongodata.updateuploadtoqiniulocalfilenotfound(video.ehost);                            }                            loghelper.log(logfileprefix + "uploadnoexisted", "文件不存在:" + filename);                            //throw new system.outofmemoryexception();//模拟抛出outofmemoryexception用                        }                    }                    catch (system.outofmemoryexception memoryex)                    {                        global.isoutofmemoryexception = true;                        loghelper.logwithlock(logfileprefix + "uploadoutofmemoryexception", "失败，文件名" + video.filename + "，异常信息:" + memoryex.message + ";内部错误" + memoryex.innerexception?.message);                    }                    catch (exception ex)                    {                        loghelper.log(logfileprefix + "uploaderror", "失败，文件名" + video.filename + "，异常信息:" + ex.message + ";内部错误" + ex.innerexception.message);                    }                    system.threading.thread.sleep(5 * 1000);//休眠                }                if (tcount <= 0)                {                    loghelper.log(logfileprefix + "uploadinfo", "暂无新待上传数据");                }                in宁夏理工学院t sleepcond = 30;                loghelper.log(logfileprefix + "uploadinfo", "--休眠" + sleepcond + "秒");                system.threading.thread.sleep(sleepcond * 1000);//休眠            }            catch (exception ex)            {                loghelper.log(logfileprefix + "uploadfullerror", "失败，异常信息:" + ex.message+ ";totalcount="+ totalcount);            }

上面处理outofmemoryexception并生成以下错误-

输出结果：

error:

    global.isoutofmemoryexception = true;                        loghelper.logwithlock(logfileprefix + "uploadoutofmemoryexception", "失败，文件名" + video.filename + "，异常信息:" + memoryex.message + ";内部错误" + memoryex.innerexception?.message);

到此这篇关于在c#中捕获内存不足异常的文章就介绍到这了,更多相关c#捕获内存异常内容请搜索www.887551.com以前的文章或继续浏览下面的相关文章希望大家以后多多支持www.887551.com！