我试图在C＃中发送电子邮件了InvalidCastException错误

Question

我特林从我的C＃（WinForm的）应用程序发送电子邮件至ADRESS前景，但我上线getteing错误如下：

Outlook.MailItem mail =(Outlook.MailItem)_app.CreateItem(Outlook.OlItemType.olMailItem); 

我得到了以下错误：

Unable to cast COM object of type ‘Microsoft.Office.Interop.Outlook.ApplicationClass’ to interface type ‘Microsoft.Office.Interop.Outlook._Application’. This operation failed because the QueryInterface call on the COM component for the interface with IID ‘{00063001-0000-0000-C000-000000000046}’ failed due to the following error: Library not registered. (Exception de HRESULT : 0x80040155)

我完整的代码：

void SendEmailAuto() 
     { 
      try 
      { 
       OpenFileDialog attachment = new OpenFileDialog(); 
       attachment.Title = "Select a file to send"; 
       attachment.ShowDialog(); 
       Outlook._Application _app = new Outlook.Application(); 
       Outlook.MailItem mail =mail= (Outlook.MailItem)_app.CreateItem(Outlook.OlItemType.olMailItem); 
       mail.To = 'paul.m@adt.org"; 
       mail.Subject = "Text"; 
       mail.Body = "Funding Request Team"; 

       if (attachment.FileName.Length > 0) 
       { 
        mail.Attachments.Add(attachment.FileName, Outlook.OlAttachmentType.olByValue, 1, attachment.FileName); 
        mail.Importance = Outlook.OlImportance.olImportanceHigh; 
        ((Outlook.MailItem)mail).Send(); 
       } 
       else 
       { 
        MessageBox.Show("You are kindly requested to attach a document.", "MISSING FILE", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); 
       } 

      } 
      catch (Exception ex) 
      { 
       string msg = ex.Message; 
      } 
     } 

Answer 1

检查：http://www.fieldstonsoftware.com/support/support_gsyncit_2013.shtml，这可能是一些注册表问题。