Create a Task on Exchange Server and to Send this Task to the assigned user

Hi Aspose Team,

Please assist me on below,
I have created a Task on Exchange server using EWSClient successfully.
I need to send this task to the assigned user so first i get the Tasks from Exchange Server using below and trying to Save the Task to .msg or .eml so i can load and Send the Task.
ExchangeMessageInfoCollection tasks = client.ListMessages(client.MailboxInfo.TasksUri);

and then save it to msg format using below
foreach (ExchangeMessageInfo info in tasks)
{
// Fetch task from exchange using current task info
ExchangeTask mytask = client.FetchTask(info.UniqueUri);

// Check if the current task fulfills the search criteria
if (mytask.Subject.Equals(“New-Test”))
{
//Delete task from exchange
client.SaveMessage(info.UniqueUri, @“C:\Task\abc.msg”);
}
}
on client.SaveMessage(info.UniqueUri, @“C:\Task\abc.msg”); i am getting below Exception.
Exception “Aspose Cannot get message item and Mime Content”.

Because to send this Task we need to Load a .msg file or .eml file using below.
MailMessage eml = MailMessage.Load(@“C:\Task\task.msg”, loadOptions);

Correct me if i an wrong with the approach.
1. first i create a task on Exchange Server
2. Get the Task from Exchange Server
3. Save the Task to the disc in .msg format
4. Load the .msg or .eml to send it out using Sending Task Request.

Please see the attached screenshot for the exception.

Thanks in advance
Vipin Panwar

Hi Vipin,

Thank you for writing to Aspose support team.

In order to send a task, you can avoid sending the task via Exchange server. EWSClient.SaveMessage raises exception and we are investigating that issue at our end. Meanwhile, you can create your task and send using SmtpClient or EWSClient as shown in the following code smaple. Please let us know if we can be of any help to you in this regard.

Sample Code:

MapiTask task = new MapiTask("To Do", "Just click and type to add new task", DateTime.Now, DateTime.Now.AddDays(3));

task.PercentComplete = 20;

task.EstimatedEffort = 2000;

task.ActualEffort = 20;

task.History = MapiTaskHistory.Assigned;

task.LastUpdate = DateTime.Now;

task.Users.Owner = "Darius";

MemoryStream ms = new MemoryStream();

task.Save(ms, TaskSaveFormat.Msg);

ms.Position = 0;

MapiMessage msg = MapiMessage.FromStream(ms);

// Convert to TNEF eml. Such a feature would allow to send messages by mail clients,

// where the information, specific for Outlook task, would be stored.

MailMessageInterpretor mi = MailMessageInterpretorFactory.Instance.GetIntepretor(msg.MessageClass);

MailMessage eml = mi.InterpretAsTnef(msg);

eml.From = "fromAddress";

eml.To.Clear();

eml.To.Add(new Aspose.Email.Mail.MailAddress("toAddress"));

// Create instance of EWSClient class by giving credentials

IEWSClient client = EWSClient.GetEWSClient("https://outlook.office365.com/ews/exchange.asmx", "testUser", "pwd", "domain");

// Send the task

client.Send(eml);

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Can't we use disk path instead of Memory Stream


MemoryStream ms = new MemoryStream();

task.Save(ms, TaskSaveFormat.Msg);

ms.Position = 0;


If can, Please suggest which is the best approach from memory and performance perspective?

Hi Vipin,

You can save to disc using the overloaded method of task.Save, but loading again from disc will of course cost you performance hit as compared to accessing from stream. But this will happen when you have alot of tasks that you want to process. Moreover, saving to disc also depends if you want to store the task at your end or not.

Hi Kashif,

Thanks for your quick reply with a solution.
Can you please assist me how to Update and Delete the Task (MapiTask) programatically?
Also i found an issue with this solution that you posted, after create the outlook MapiTask when i go to the Tasks in outlook i found that i am not able to ‘Manage Task’ as it is disable. Like Assign Task, Mark as Complete Task.
When i create a Task with Exchange Server through EWSClient then i am able to do so. But that way i can’t save that into ‘.msg’ or ‘.eml’ to send the same to the assigned user that why you suggested to use MapiTask.
Please assist me on the above?
Let me know if you need snap for the disabled items in Manage Task…

Hi Vipin,

Thank you for writing back.

1. UpdateTask Programmatically

You can load a MapiTask (saved as .MSG) using MapiTask class and then update its properties as you did while creating the task. Once done, you can resave it as MSG file again. Please see the code sample below:

Sample C# Code:

MapiMessage msg = MapiMessage.FromFile("MapiTask.msg");
MapiTask task2 = (MapiTask)msg.ToMapiMessageItem();
task2.PercentComplete = 50;
task2.Save("UpdatedTask.msg", TaskSaveFormat.Msg);

2. Delete a Task

Can you please share where do you want to delete the task from? It’s better if you create a new post and share the exact requirements there.

3. When you create a task using EWSClient, there is no such way to download and save the Task at present. This requirement has been logged as EMAILNET-34759 in our issue tracking system for consideration by our product team. We’ll notify you here once there is some information available in this regard.

4. Assign Task option is disabled: Please refer to this [thread](https://forum.aspose.com/t/27379) for information about this.

Hi Kashif,


Thanks again for your reply.
I tried same for Update with the below sample code. It’s update the Task specific property in the object but when i look into the outlook Task, Task is not updated or Sync.
Case: I tried to update subject of a existing MapiTask. I run the below code and i found when i debug code after read MapiTask.Msg from disc it returns updated Subject but that Updated Subject not seen in the Outlook Task List.

Sample Code:

MapiMessage msg = MapiMessage.FromFile(“MapiTask.msg”);

MapiTask task2 = (MapiTask)msg.ToMapiMessageItem();

task2.Subject= “Updated Subject”;

task2.Save(“UpdatedTask.msg”, TaskSaveFormat.Msg);

Hi Vipin,


It seems you are confusing two things here.

1. ExchangeTask represents the task that you create on the ExchangeServer. You can then update it and delete it as mentioned in our documentation article, working with Tasks on Exchange Server. In this case, if your Exchange Server is configured in your Outlook, the tasks in Outlook will automatically sync with Exchange server and the tasks will be at their latest state. Please note that ExchangeTask can’t be sent to anyone or assigned.

2. MapiTask on the other hand represents Outlook task that you can create using our API for sending to someone or storing to a PST. This is not the same as case 1 above as it is not available in your Outlook profile and is local to disc or PST where you have added it. If you will update it, you will have to replace it in your PST file or on disc by resaving it.

For your requirements of updating a task, you need to create the task on Exchange Server so that when it is updated, deleted, the changes are automatically synched to your Outlook as well.

PS: This thread seems to be spanned about a number of issues which are making it difficult to focus on the original requirement. I would suggest you to please use one thread per requirement so that we can assist you much better in this regard.


The issues you have found earlier (filed as EMAILNET-34759) have been fixed in this update.


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