从服务器端发送带有图像的电子邮件

Question

我在C＃中有以下代码，使用ScriptManager从ASP.NET页面调用：

    [WebMethod]
    public static void testEmail(string FileName)
    {
        //Asigning a hardcoded value for test
        FileName="c:\\Users\\myuser\\Pictures\\mypicture.jpg";
        MailMessage message = new MailMessage();

        message.From = new MailAddress("originemailaddr@serverx.net");
        message.To.Add("detinationmail@servery.net");
        message.IsBodyHtml = true;

        AlternateView plainView = AlternateView.CreateAlternateViewFromString("This is my plain text content, viewable by those clients that don't support html", null, "text/plain");
        AlternateView htmlView = AlternateView.CreateAlternateViewFromString("Here is an embedded image.<img src=cid:companylogo>", null, "text/html");
        LinkedResource logo = new LinkedResource(FileName, "image/jpg");
        logo.ContentId = "companylogo";
        htmlView.LinkedResources.Add(logo);

        message.AlternateViews.Add(plainView);
        message.AlternateViews.Add(htmlView);


        SmtpClient client = new SmtpClient("0.0.0.0", 25);
        client.Timeout = 1000;
        client.Credentials = CredentialCache.DefaultNetworkCredentials;
        client.Send(message);

        message.Dispose();
        client.Dispose();
    }

当我在本地计算机上调试时，代码正常工作。一旦发布，返回500错误（我认为是由于代码试图在服务器上找到该文件，而不是在打开网页的本地计算机中）。我有一些时间试图找到信息，但到目前为止没有运气。有什么建议吗？