[英]Infopath FileQueryConnection.Execute(XpathNavigator) throws System.Net.WebException: Attempted to read or write protected memory
我在啟用瀏覽器的infopath表單2007的字段更改事件中包含此代碼-
try
{
XmlDocument outputFile = new XmlDocument();
FileQueryConnection con = (FileQueryConnection)DataConnections["connection1"];
con.FileLocation = @"http://server_name/_vti_bin/owssvr.dll"
+ "?Cmd=Display&List={List_ID}"
+ "&XMLDATA=TRUE&View={View_ID}&Query=*"
+ "&FilterField1=Country_x0020_Name&FilterValue1="
+ country.Replace("&","%26");
outputFile.LoadXml("<?xml version=\"1.0\" encoding=\"utf-8\" ?><outputRoot></outputRoot>");
XmlNamespaceManager outputFileNamespaceManager = new XmlNamespaceManager(outputFile.NameTable);
// XmlDocument output file created above.
XPathNavigator outputFileNavigator = outputFile.CreateNavigator();
XPathNavigator outputRootNavigator =
outputFileNavigator.SelectSingleNode("/outputRoot",outputFileNamespaceManager);
con.Execute(outputRootNavigator);
File.AppendAllText(@"E:\log.txt", outputRootNavigator.ToString());
}
catch (Exception exp)
{
File.AppendAllText(@"E:\exp.txt", exp.ToString());
}
我得到這個例外-
System.Net.WebException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.at Microsoft.Office.InfoPath.Internal.MomExceptionHelper.ExecuteDataConnectionAction(OMCall d) at Microsoft.Office.InfoPath.Internal.FileQueryConnectionHost.Execute(XPathNavigator output) at cascadeTemplate.FormCode.field1_Changed(Object sender, XmlEventArgs e)
為什么會引發這樣的異常? 我在代碼中缺少什么嗎?
謝謝您的幫助!
它最有可能是由FileQueryConnection引起的。 由於從未使用con變量,因此請刪除以下行:
FileQueryConnection con = (FileQueryConnection)DataConnections["connection1"];
con.FileLocation = ...
con.Execute(outputRootNavigator); 寫入日志文件之前,應在此處關閉連接“ con”。 File.AppendAllText(@“ E:\\ log.txt”,outputRootNavigator.ToString());
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