issues with To Bcc and CC when building an email message using Graph

I am reasonably new to C#, but not .NET development. I am new to Graph development and don’t have a whole heap of JSON experience.

I am trying to build the code that can be used to construct messages within my organisation. Ultimately the code will become an RPA code object.

I have a class for the message, which has classes defined for toRecipient, ccRecipient and bccRecipient. Creating and sending an email works fine when I have data for the To, CC and Bcc options. However, I get an error message if I only have To recipients and not cc or Bcc recipitents. Similarly I cannot send to bcc only, as the code is looking for values to the toRecipients and CC recipients. The Error Message is :

{"error":{"code":"ErrorInvalidRecipients","message":"At least one recipient isn't valid., Recipient '' is not resolved. All recipients must be resolved before a message can be submitted."}}

How do I make the sub classes for cc and BCC optional? – or is there syntax I can use to tell the API that cc and bcc fields are empty?

I build the class based on a message created using Postman, and then using Paste Special into my message class.

This class is as follows;

public class gMessage
{
public grfMessage message { get; set; }
public string saveToSentItems { get; set; }
}
public class grfMessage
{
public string subject { get; set; }
public Body body { get; set; }
public List toRecipients { get; set; }
public List ccRecipients { get; set; }
public List bccRecipients { get; set; }
}
public class Body
{
public string contentType { get; set; }
public string content { get; set; }
}
public class ToRecipient
{
public EmailAddress EmailAddress { get; set; }
public static implicit operator List<object>(ToRecipient v)
{
throw new NotImplementedException();
}
}
public class EmailAddress
{
public string address { get; set; }
}

The Code to build the message is;

// Define our recipient list
List listRecip = new List(); // define new list. We will ultimately split the inbount array into this list
ToRecipient RecipEmail;
EmailAddress ema1;
// now split our list of recipients to an array
string[] ToAdds = EmailRecipients.Split(';');
foreach (var email in ToAdds)
{
// Build the recipients list first
RecipEmail = new ToRecipient();
ema1 = new EmailAddress
{
address = email
}; // Email Address class contains Address
RecipEmail.EmailAddress = ema1;
listRecip.Add(RecipEmail); // We have now added to the list in memory
}
//Define our CC List
List ccRecip = new List(); // define new list. We will ultimately split the inbount array into this list
ToRecipient ccEmail;
string[] ccAdds = EmailCCList.Split(';');
foreach (var email in ccAdds)
{
// Build the recipients list first
ccEmail = new ToRecipient();
ema1 = new EmailAddress
{
address = email
}; // Email Address class contains Address
ccEmail.EmailAddress = ema1;
ccRecip.Add(ccEmail); // We have now added to the list in memory
}
//Define our BCC List
List bccRecip = new List(); // define new list. We will ultimately split the inbount array into this list
ToRecipient bccEmail;
string[] bccAdds = EmailBCCList.Split(';');
foreach (var email in bccAdds)
{
// Build the recipients list first
bccEmail = new ToRecipient();
ema1 = new EmailAddress
{
address = email
}; // Email Address class contains Address
bccEmail.EmailAddress = ema1;
bccRecip.Add(bccEmail); // We have now added to the list in memory
}
var msgData = new gMessage()
{
message = new grfMessage()
{
subject = mSubject,
body = new Body()
{
contentType = mContentType,
content = mBody
},
toRecipients = listRecip,
ccRecipients = ccRecip,
bccRecipients = bccRecip
},
saveToSentItems = "True"
};

Any help is much appreciated!

Thank you!

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Sachin Singh5y ago
test this
var msgData = new gMessage()

{
        message = new grfMessage()
    {
    subject = mSubject,
    body = new Body()
    {
       contentType = mContentType,
       content = mBody
    },
    toRecipients = listRecip,
if(ccRecip.Count>0)
{
    ccRecipients = ccRecip + ","
}
if(bccRecip.Count>0)
{
    bccRecipients = bccRecip +","
    },
    saveToSentItems = "True"
};