我正在使用此代码修改pdf tmeplate以向其添加特定详细信息，
private static byte[] GeneratePdfFromPdfFile(byte[] file, string landingPage, string code)
{
try
{
using (var ms = new MemoryStream())
{
using (var reader = new PdfReader(file))
{
using (var stamper = new PdfStamper(reader, ms))
{
string _embeddedURL = "http://" + landingPage + "/Default.aspx?code=" + code + "&m=" + eventCode18;
PdfAction act = new PdfAction(_embeddedURL);
stamper.Writer.SetOpenAction(act);
stamper.Close();
reader.Close();
return ms.ToArray();
}
}
}
}
catch(Exception ex)
{
File.WriteAllText(HttpRuntime.AppDomainAppPath + @"AttachmentException.txt", ex.Message + ex.StackTrace);
return null;
}
}
从此方法调用此方法：
public static byte[] GenerateAttachment(AttachmentExtenstion type, string Contents, string FileName, string code, string landingPage, bool zipped, byte[] File = null)
{
byte[] finalVal = null;
try
{
switch (type)
{
case AttachmentExtenstion.PDF:
finalVal = GeneratePdfFromPdfFile(File, landingPage, code);
break;
case AttachmentExtenstion.WordX:
case AttachmentExtenstion.Word:
finalVal = GenerateWordFromDocFile(File, code, landingPage);
break;
case AttachmentExtenstion.HTML:
finalVal = GenerateHtmlFile(Contents, code, landingPage);
break;
}
return zipped ? _getZippedFile(finalVal, FileName) : finalVal;
}
catch(Exception ex)
{
return null;
}
}
这是主要的来电者，
foreach (var item in Recipients)
{
//...
//....
item.EmailAttachment = AttachmentGeneratorEngine.GenerateAttachment(_type, "", item.AttachmentName, item.CMPRCode, _cmpTmp.LandingDomain, _cmpTmp.AttachmentZip.Value, _cmpTmp.getFirstAttachment(item.Language, item.DefaultLanguage));
}
正在调用 AttachmentGeneratorEngine.GenerateAttachment 方法。 4k次，因为我正在为我的List中的每个元素添加PDF模板中的特定PDF文件。
最近我开始有这个例外：
Exception of type 'System.OutOfMemoryException' was thrown. at System.IO.MemoryStream.ToArray()
我已经在课程中实现了IDisposible，并确保所有这些都被释放。
注意：它在非常平滑之前运行，并且我还仔细检查了系统的资源 - 在16 GB中使用了9 GB，因此我有足够的可用内存。
==========================================
更新： 这是循环遍历列表的代码
public static bool ProcessGroupLaunch(string groupCode, int customerId, string UilangCode)
{
CampaignGroup cmpGList = GetCampaignGroup(groupCode, customerId, UilangCode)[0];
_campaigns = GetCampaigns(groupCode, customerId);
List<CampaignRecipientLib> Recipients = GetGroupRcipientsToLaunch(cmpGList.ID, customerId);
try
{
foreach (var item in _campaigns)
item.Details = GetCampaignDetails(item.CampaignId.Value, UilangCode);
Stopwatch stopWatch = new Stopwatch();
#region single-threaded ForEach
foreach (var item in Recipients)
{
CampaignLib _cmpTmp = _campaigns.FirstOrDefault(x => x.CampaignId.Value == item.CampaignId);
bool IncludeAttachment = _cmpTmp.IncludeAttachment ?? false;
bool IncludeAttachmentDoubleBarrel = _cmpTmp.IncludeAttachmentDoubleBarrel ?? false;
if (IncludeAttachment)
{
if (_cmpTmp.AttachmentExtension.ToLower().Equals("doc") || (_cmpTmp.AttachmentExtension.ToLower().Equals("docx")))
_type = AttachmentGeneratorEngine.AttachmentExtenstion.Word;
else if (_cmpTmp.AttachmentExtension.ToLower().Equals("ppt") || (_cmpTmp.AttachmentExtension.ToLower().Equals("pptx")))
_type = AttachmentGeneratorEngine.AttachmentExtenstion.PowePoint;
else if (_cmpTmp.AttachmentExtension.ToLower().Equals("xls") || (_cmpTmp.AttachmentExtension.ToLower().Equals("xlsx")))
_type = AttachmentGeneratorEngine.AttachmentExtenstion.Excel;
else if (_cmpTmp.AttachmentExtension.ToLower().Equals("pdf"))
_type = AttachmentGeneratorEngine.AttachmentExtenstion.PDF;
else if (_cmpTmp.AttachmentExtension.ToLower().Equals("html"))
_type = AttachmentGeneratorEngine.AttachmentExtenstion.HTML;
}
//set "recpient" details
item.EmailFrom = _cmpTmp.EmailFromPrefix + "@" + _cmpTmp.EmailFromDomain;
item.EmailBody = GetChangedPlaceHolders((_cmpTmp.getBodybyLangCode(string.IsNullOrEmpty(item.Language) ? item.DefaultLanguage : item.Language, item.DefaultLanguage)), item.ID, _cmpTmp.CustomerId.Value, _cmpTmp.CampaignId.Value);
if (item.EmailBody.Contains("[T-LandingPageLink]"))
{
//..
}
if (item.EmailBody.Contains("[T-FeedbackLink]"))
{
//..
}
if (item.EmailBody.Contains("src=\".."))
{
//..
}
//set flags to be used by the SMTP Queue and Scheduler
item.ReadyTobeSent = true;
item.PickupReady = false;
//add attachment to the recipient, if any.
if (IncludeAttachment)
{
item.AttachmentName = _cmpTmp.getAttachmentSubjectbyLangCode(string.IsNullOrEmpty(item.Language) ? item.DefaultLanguage : item.Language, item.DefaultLanguage) + "." + _cmpTmp.AttachmentExtension.ToLower();
try
{
if (_type == AttachmentGeneratorEngine.AttachmentExtenstion.PDF || _type == AttachmentGeneratorEngine.AttachmentExtenstion.WordX || _type == AttachmentGeneratorEngine.AttachmentExtenstion.Word)
item.EmailAttachment = AttachmentGeneratorEngine.GenerateAttachment(_type, "", item.AttachmentName, item.CMPRCode, _cmpTmp.LandingDomain, _cmpTmp.AttachmentZip.Value, _cmpTmp.getFirstAttachment(item.Language, item.DefaultLanguage));
else item.EmailAttachment = AttachmentGeneratorEngine.GenerateAttachment(_type, value, item.AttachmentName, item.CMPRCode, _cmpTmp.LandingDomain, _cmpTmp.AttachmentZip.Value);
item.AttachmentName = _cmpTmp.AttachmentZip.Value ? (_cmpTmp.getAttachmentSubjectbyLangCode(string.IsNullOrEmpty(item.Language) ? item.DefaultLanguage : item.Language, item.DefaultLanguage) + ".zip") :
_cmpTmp.getAttachmentSubjectbyLangCode(string.IsNullOrEmpty(item.Language) ? item.DefaultLanguage : item.Language, item.DefaultLanguage) + "." + _cmpTmp.AttachmentExtension.ToLower();
}
catch (Exception ex)
{
}
}
else
{
item.EmailAttachment = null;
item.AttachmentName = null;
}
}
#endregion
stopWatch.Stop();
bool res = WriteCampaignRecipientsLaunch(ref Recipients);
return res;
}
catch (Exception ex)
{
Recipients.ForEach(i => i.Dispose());
cmpGList.Dispose();
Recipients = null;
cmpGList = null;
return false;
}
finally
{
Recipients.ForEach(i => i.Dispose());
cmpGList.Dispose();
Recipients = null;
cmpGList = null;
}
}