C#操作OutLook发邮件失败

Question

调用olEMail.Send()报错: 0x80004004，网上查了一下，没解决问题。。。

还有就是email是富文本RichText格式的，添加正文附件的位置怎么调整？

求大神指导，代码块如下：

Microsoft.Office.Interop.Outlook.Application app = new Microsoft.Office.Interop.Outlook.Application();
            Microsoft.Office.Interop.Outlook.NameSpace nSpace = app.GetNamespace("MAPI");
            Microsoft.Office.Interop.Outlook.MailItem olEMail = app.CreateItem(Microsoft.Office.Interop.Outlook.OlItemType.olMailItem);
            Microsoft.Office.Interop.Outlook.Attachments olAttach = olEMail.Attachments; 
            olEMail.To = "[e-mail]";
            olEMail.Subject = "TestMail";
            olEMail.BodyFormat = Microsoft.Office.Interop.Outlook.OlBodyFormat.olFormatRichText;
            string stext = string.Empty;
            stext += "Adding A1 one more line"+ System.Environment.NewLine;
            stext += "Adding A2 one more line"+ System.Environment.NewLine;
            stext += "Adding A3 one more line"+ System.Environment.NewLine;
            stext += "Adding A4 one more line";
            olEMail.Body = stext;

            olAttach.Add("C:\\Text\\4.txt", Microsoft.Office.Interop.Outlook.OlAttachmentType.olOLE, stext.IndexOf("A4"));
            olAttach.Add("C:\\Text\\3.txt", Microsoft.Office.Interop.Outlook.OlAttachmentType.olOLE, stext.IndexOf("A3"));
            olAttach.Add("C:\\Text\\2.txt", Microsoft.Office.Interop.Outlook.OlAttachmentType.olOLE, stext.IndexOf("A2"));
            olAttach.Add("C:\\Text\\1.txt", Microsoft.Office.Interop.Outlook.OlAttachmentType.olOLE, stext.IndexOf("A1"));

            //olEMail.Display();
            olEMail.Send();
            olEMail = null;
            app = null;

Answer 1

outlook有没有安装好，重新引用下outlook的库，还有，你的系统和你的office还有你的程序的架构要一致，比如都是32bit或者都是64bit