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我正在創建必須發送給技術人員的電子郵件。大約有12封電子郵件（根據所選擇的打印機型號，僅發送一封）。電子郵件一切都很好。我遇到的唯一問題是圖像不顯示，它們以附件擴展名爲.bin。我正在使用案例陳述來發送電子郵件。任何幫助我做錯了將不勝感激。謝謝。圖像不在電子郵件中顯示（顯示爲.bin）
這是我的代碼看起來像：
在case語句：
string headerPath = Server.MapPath("~\\Images\\EmailImages\\1022_03.png");
LinkedResource img1022_03 = new LinkedResource(headerPath);
img1022_03.ContentId = "1022_03";
string tonerPath = Server.MapPath("~\\Images\\EmailImages\\TonerSignature.png");
LinkedResource TonerSignature = new LinkedResource(tonerPath);
TonerSignature.ContentId = "TonerSignature";
string img1022_11Path = Server.MapPath("~\\Images\\EmailImages\\1022_11.png");
LinkedResource img1022_11 = new LinkedResource(img1022_11Path);
img1022_11.ContentId = "1022_11";
AlternateView avDefault = AlternateView.CreateAlternateViewFromString(SendOMD(), null, MediaTypeNames.Text.Html);
avDefault.LinkedResources.Add(img1022_03);
avDefault.LinkedResources.Add(TonerSignature);
avDefault.LinkedResources.Add(img1022_11);
Mail.AlternateViews.Add(avDefault);
此代碼是默認的case語句裏面。外面的情況下，我添加的smtp細節：
System.Configuration.Configuration configurationFile = WebConfigurationManager.OpenWebConfiguration("~/web.config");
MailSettingsSectionGroup mailSettings = configurationFile.GetSectionGroup("system.net/mailSettings") as MailSettingsSectionGroup;
if (mailSettings != null)
{
int port = mailSettings.Smtp.Network.Port;
string host = mailSettings.Smtp.Network.Host;
string password = mailSettings.Smtp.Network.Password;
string username = mailSettings.Smtp.Network.UserName;
}
SmtpClient SMTP = new SmtpClient();
SMTP.Send(Mail);
這是我的電子郵件的方法是什麼樣子：
private string SendOMD()
{
string techType = radTechnicianType.SelectedValue.ToString();
string techString = "";
if (techType == "Field Technician")
techString = "Please send a technician to replace the toner on the above mentioned machine.";
else if (techType == "Onsite technician")
techString = "Please replace the toner on the above mentioned machine.";
else
techString = "Please send a technician to replace the toner on the above mentioned machine.";
StringBuilder stringBuilt = new StringBuilder();
stringBuilt.AppendLine(@"<style type=""text/css"">");
stringBuilt.AppendLine(".divStyle { font-family:Verdana,sans-serif, Arial, Helvetica; font-size:10pt; font-weight: bold; }");
stringBuilt.AppendLine(".par { font-family:Verdana,sans-serif, Arial, Helvetica; font-size:10pt; width:658px; }");
stringBuilt.AppendLine("table { border: 1px solid #000; border-collapse: collapse; font-family:Verdana; font-size:10pt; background-color:#dcdcdc; }");
stringBuilt.AppendLine("table td { border-left: 1px solid #000; font-family:Verdana,sans-serif, Arial, Helvetica; font-size:10pt; background-color:snow; border-bottom: 1px solid #000; padding-left:2px; margin-left:2px; padding-right:5px; margin-right:5px; }");
stringBuilt.AppendLine("table td:first-child { border-left: none; font-family:Verdana,sans-serif, Arial, Helvetica; font-size:10pt; background:#dcdcdc; background-color:#dcdcdc; border-bottom: 1px solid #000; }");
stringBuilt.AppendLine("</style>");
stringBuilt.AppendLine(@"<img alt="" src=""cid:1022_03"" width=""817"" height=""123"" />");
stringBuilt.AppendLine("<br/>");
stringBuilt.AppendLine(@"<p class=""par"">Dear " + txtClient.Text.Trim() + ",</p>");
stringBuilt.AppendLine("Details:");
stringBuilt.AppendLine("<br/>");
stringBuilt.AppendLine("<table>");
stringBuilt.AppendLine(@"<tr><td style=""background-color:#dcdcdc; widht:350px;"" >Model: </td><td style=""widht:250px;""> " + lstModelType.SelectedValue.ToString() + " </td></tr>");
stringBuilt.AppendLine(@"<tr><td style=""background-color:#dcdcdc; widht:350px;"" >Serial No: </td><td style=""widht:250px;""> " + txtSerial.Text.Trim() + " </td></tr>");
stringBuilt.AppendLine(@"<tr><td style=""background-color:#dcdcdc; widht:350px;"" >IP Address: </td><td style=""widht:250px;""> " + txtIPAddress.Text.Trim() + " </td></tr>");
stringBuilt.AppendLine(@"<tr><td style=""background-color:#dcdcdc; widht:350px;"" >AD Sharename: </td><td style=""widht:250px;""> " + txtADSharename.Text.Trim() + " </td></tr>");
stringBuilt.AppendLine(@"<tr><td style=""background-color:#dcdcdc; widht:350px;"">Department: </td><td style=""widht:250px;""> " + txtDepartment.Text.Trim() + " </td></tr>");
stringBuilt.AppendLine(@"<tr><td style=""background-color:#dcdcdc; widht:350px;"">Colour: </td><td style=""widht:250px;""> " + lstColour.SelectedValue.ToString() + " </td></tr>");
stringBuilt.AppendLine("</table>");
stringBuilt.AppendLine(@"<p class=""par""><em>" + techString + "</em></p>");
stringBuilt.AppendLine("<br/>");
stringBuilt.AppendLine(@"<div class=""divStyle""> Regards, ");
stringBuilt.AppendLine("<br/>");
stringBuilt.AppendLine(lstApprover.SelectedValue.ToString());
stringBuilt.AppendLine("</div>");
stringBuilt.AppendLine(@"<img alt="" src=""cid:TonerSignature"" width=""300"" height=""70"" />");
stringBuilt.AppendLine("<br/>");
stringBuilt.AppendLine(@"<img alt="" src=""1022_11"" width=""815"" height=""54"" />");
return stringBuilt.ToString();
}