Question

I have a winforms application and I am trying to create a method that will create and open a new Outlook Email. So far I have

private void CreateOutlookEmail()
    {
        try
        {                
            Outlook.MailItem mailItem = (Outlook.MailItem)
                this.CreateItem(Outlook.OlItemType.olMailItem);
            mailItem.Subject = "This is the subject";
            mailItem.To = "[e-mail]";
            mailItem.Body = "This is the message.";
            mailItem.Importance = Outlook.OlImportance.olImportanceLow;
            mailItem.Display(false);
        }
        catch (Exception eX)
        {
            throw new Exception("cDocument: Error occurred trying to Create an Outlook Email"
                                + Environment.NewLine + eX.Message);
        }
    }

But the ‘CreateItem’ reference is underlined with the error message

“does not contain a definition for CreateItem”

I thought ‘CreateItem’ was a standard method for MS Office items, but admittedly I did find the above code on another website and simply copied it.

What am I misunderstanding please?

Answer 1

Think about it. You are calling the CreateItem method on this current object. Have you defined the CreateItem method in this class?

Instead of your:

Outlook.MailItem mailItem = (Outlook.MailItem) this.CreateItem(Outlook.OlItemType.olMailItem);

You need the lines:

Outlook.Application outlookApp = new Outlook.Application();
Outlook.MailItem mailItem = (Outlook.MailItem) outlookApp.CreateItem(Outlook.OlItemType.olMailItem);

You create an instance of the outlook application, on which you can call the CreateItem method.

Edit

There are two more things to make this work properly.

1) Add a reference to the Microsoft.Office.Interop.Outlook package to your project

2) Ensure you have the appropriate using statement in your class

using Outlook = Microsoft.Office.Interop.Outlook;