Set up sender account to my Microsoft.Office.Interop.Outlook._MailItem from my WPF Project

Question

I have a WPF C # project where I have a function to send emails, with Microsoft.Office.Interop.Outlook._MailItem but I don't know how to configure the sender account, it is a gmail account, and I don't know how to tell it or how to give it the username and password of it, can someone guide me?

public void sendEMailThroughOUTLOOK(string PDFAdjunto, string XMLAdjunto, string from, string[] to, string subject, string body, string cc)
{
    try
    {            
        Microsoft.Office.Interop.Outlook.Application oApp = new Microsoft.Office.Interop.Outlook.Application();
        // Create a new mail item.
        Microsoft.Office.Interop.Outlook.MailItem oMsg = (Microsoft.Office.Interop.Outlook.MailItem)oApp.CreateItem(Microsoft.Office.Interop.Outlook.OlItemType.olMailItem);

        // add to's
        if (to[0] != string.Empty && to[0] != null)
        {
            oMsg.Recipients.Add(to[0]);
        }
        if (to[1] != string.Empty && to[1] != null)
        {
            oMsg.Recipients.Add(to[1]);
        }

        // Mail body
        oMsg.Body = body;
        oMsg.BodyFormat = Microsoft.Office.Interop.Outlook.OlBodyFormat.olFormatPlain;

        // Mail attachments
        Microsoft.Office.Interop.Outlook.Attachment oAttach1 = oMsg.Attachments.Add(XMLAdjunto);
        Microsoft.Office.Interop.Outlook.Attachment oAttach2 = oMsg.Attachments.Add(PDFAdjunto);

        // Mail subject
        oMsg.Subject = subject;

        // Resolve accounts
        oMsg.Recipients.ResolveAll();

        // Send mail
        ((Microsoft.Office.Interop.Outlook._MailItem)oMsg).Send();

        // Clean up.
        oMsg = null;
        oApp = null;
    }
    catch (System.Exception e) 
    {
        Mensaje = new wMensaje("Error en envío de Mail", DateTime.Now.ToString()
            + System.Environment.NewLine + subject
            + System.Environment.NewLine + " De: '" + from + "' "
            + System.Environment.NewLine + " Para: '" + to[0] + "', '" + to[1] + "' '"
            + (e.Message.Contains("Operación anulada") ? System.Environment.NewLine + System.Environment.NewLine + "-->  Asegúrese de tener ABIERTO su Outlook  <--" : "")
            + System.Environment.NewLine + System.Environment.NewLine + " Error: "
        + System.Environment.NewLine + System.Environment.NewLine
        + (e.InnerException == null ? e.Message : e.InnerException.ToString()));
        Mensaje.ShowDialog();
    }
}

Answer 1

I don't know how to configure the sender account, it is a gmail account, and I don't know how to tell it or how to give it the username and password of it

You can use the MailItem.SendUsingAccount property which returns or sets an Account object that represents the account under which the MailItem is to be sent. The SendUsingAccount property can be used to specify the account that should be used to send the MailItem when the Send method is called. This property returns Null (Nothing in Visual Basic) if the account specified for the MailItem no longer exists.

Note, to be able to set up the SendUsingAccount property it must be configured in the Outlook profile.

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You may also consider using the System.Net.Mail namespace, read more about that in the Send email using System.Net.Mail through gmail article.