Question

业务流程错误 System.Security.SecurityException：请求类型＆＃39; System.Security.Permissions.FileIOPermission ，mscorlib，Version = 4.0.0.0，Culture = neutral，公钥= b77a5c561934e089＆＃39;失败。在System.Security.CodeAccessSecurityEngine.Check（对象需求，StackCrawlMark＆amp; stackMark，Boolean isPermSet）在System.Security.CodeAccessPermission.Demand（） at System.IO.FileStream.Init（String path，FileMode mode，FileAccess access，Int32 rights，Boolean useRights，FileShare share，Int32 bufferSize，FileOptions options，SECURITY_ATTRIBUTES secAttrs，String msgPath，Boolean bFromProxy，Boolean useLongPath，Boolean checkHost） at System.IO.FileStream..ctor（String path，FileMode mode，FileAccess access，FileShare share，Int32 bufferSize，FileOptions options，String msgPath，Boolean bFromProxy，Boolean useLongPath，Boolean checkHost） at System.IO.File.InternalWriteAllBytes（String path，Byte [] bytes，Boolean checkHost）在RetrieveAttachments.RetrieveClass.Execute（IServiceProvider serviceProvider）失败的行动是：需求失败的第一个权限的类型是： System.Security.Permissions.FileIOPermission 失败的程序集区域是：我的电脑

我还在插件AssemblyInfo.cs文件中添加了以下方法 [assembly：System.Security.AllowPartiallyTrustedCallers] 但它提出同样的错误。

QueryExpression notes = new QueryExpression { EntityName = "annotation", ColumnSet = new ColumnSet("filename", "subject", "annotationid", "documentbody","mimetype") };
notes.Criteria.AddCondition("annotationid", ConditionOperator.Equal, annotationid);
     EntityCollection NotesRetrieve = service.RetrieveMultiple(notes);
     if (NotesRetrieve != null && NotesRetrieve.Entities.Count > 0)
     {
      foreach (var note in NotesRetrieve.Entities)
      {
       string fileName = note.GetAttributeValue<string>("filename");
       string cleanFileName = string.Empty;
       foreach (var chr in fileName.ToCharArray().ToList())
       {
        if(!Path.GetInvalidFileNameChars().Contains(chr)) cleanFileName = cleanFileName + chr; 
       }
     FileIOPermission f = new FileIOPermission(FileIOPermissionAccess.Write, @"D:\note");
     string fileLocation = Path.Combine(@"D:\note", cleanFileName);
     byte[] fileContent = Convert.FromBase64String(NotesRetrieve.Entities[0].Attributes["documentbody"].ToString());
     System.IO.File.WriteAllBytes(fileLocation, fileContent);
    }
   }

Answer 1

禁止从沙盒插件中读取文件。尝试将隔离模式更改为无。

Answer 2

如果您的插件已在沙盒中注册，那么这可能就是问题所在。尝试在沙箱之外注册它。 Here您可以找到有关信任级别的信息

如何解决Dynamics CRM插件System.Security.Permissions.FileIOPermission错误

2 个答案: