郵便番号付きの添付ファイルは動作しません

Question

私はMVC3 projectを持っています。私の連絡先ページでは、顧客から送られた電子メールに添付ファイルを追加する可能性を追加したいと考えています。

私はPostalを使用しています。それはうまく動作しますが、私はアタッチメントを動作させることができません。ここで

はこれに対処私のコードの一部です：

私はmodel classを持っている：ここでは

public class ContactEmail 
{ 
    [ScaffoldColumn(false)] 
    public int id { get; set; } 

    [Required(ErrorMessage = "Name is required!")] 
    [DataType(DataType.Text)] 
    [DisplayName("Name")] 
    public string name { get; set; } 

    [Required(ErrorMessage = "Email Address is required!")] 
    [DataType(DataType.EmailAddress)] 
    [DisplayName("Email Address")] 
    [RegularExpression(@"[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}", ErrorMessage = "Email Address is not valid.")] 
    public string email { get; set; } 

    [Required(ErrorMessage = "Country is required!")] 
    [DisplayName("Country")] 
    public string country { get; set; } 

    [DisplayName("Subject")] 
    public string subject { get; set; } 

    [Required(ErrorMessage = "Message is required!")] 
    [DisplayName("Message")] 
    [StringLength(1500)] 
    public string message { get; set; } 

    [ScaffoldColumn(false)] 
    public DateTime datetime { get; set; } 

    public HttpPostedFileBase attachment { get; set; } 

は私Postal Controllerです：

public class PostalController : Controller 
{ 
    [HttpPost] 
    public ActionResult Send(ContactEmail model) 
    { 

     if (ModelState.IsValid) 
     { 
      Random random = new Random(); 
      var ticket = random.Next(1000000000, 2000000000); 

      dynamic courriel = new Email("Postal"); 
      courriel.To = "support@coderfortraders.com"; 
      courriel.Name = model.name; 
      courriel.Country = model.country; 
      courriel.Subject = model.subject; 
      courriel.From = model.email; 
      courriel.Message = model.message; 
      courriel.TicketId = ticket; 
      courriel.Attachment = model.attachment; 
      //if (model.Attachment != null && model.Attachment.ContentLength > 0) 
      //{ 
      // var attachment = new Attachment(model.Attachment.InputStream, model.Attachment.FileName); 
      // courriel.Attachments.Add(attachment); 
      //} 
      //courriel.Attachment = model.Attachment; 

      courriel.Attach(new Attachment(model.attachment.InputStream, model.attachment.FileName)); 

      Task task = courriel.SendAsync(); 

      //courriel.Send(); 

      return RedirectToAction("Sent", "Contact"); 
     } 

     ViewData["MessageSent"] = false; 

     return View("~/Views/Contact/Contact.cshtml"); 
    } 

と最終的にここでは、フォームIであります私の中で使うContact.cshtml view：

@using (Html.BeginForm("Send", "Postal")) 
{   
    @Html.ValidationSummary(false) 

    <p> 
     @Html.LabelFor(model => model.name) 
     @Html.TextBoxFor(model => model.name, new { @size = 35 }) 
     @Html.ValidationMessageFor(model => model.name, "*") 
    </p>      
    <p> 
     @Html.LabelFor(model => model.email) 
     @Html.TextBoxFor(model => model.email, new { @size = 35 }) 
     @Html.ValidationMessageFor(model => model.email, "*") 
    </p> 
    <p> 
     @Html.LabelFor(model => model.subject) 
     @Html.DropDownList(
      "subject", 
      new[] { 
       new SelectListItem { 
        Text = "NT Indicator Quote", 
        Value = "NT Indicator Quote" 
       }, 
       new SelectListItem { 
        Text = "NT Strategy Quote", 
        Value = "NT Strategy Quote" 
       }, 
       new SelectListItem { 
        Text = "Comments", 
        Value = "Comments" 
       }, 
       new SelectListItem { 
        Text = "other", 
        Value = "other" 
       } 
      } 
     ); // @Html.DropDownList(
     @Html.ValidationMessageFor(model => model.subject, "*") 
    </p> 
    <p> 
     @Html.LabelFor(model => model.message) 
     @Html.TextAreaFor(model => model.message, new { @cols = 50, @rows = 10 }) 
     @Html.ValidationMessageFor(model => model.message, "*") 
    </p> 
    <p> 
     @Html.LabelFor(model => model.attachment) 
     @Html.TextBoxFor(model => model.attachment, new { type = "file" }) 
     @Html.ValidationMessageFor(model => model.attachment) 
    </p>   
    <p><input type="submit" id="submit" name="submit" value="Submit" /></p>    
} <!-- End form --> 

私は、次のエラーメッセージが表示されます。

Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error: Line 44: courriel.Attach(new Attachment(model.attachment.InputStream, model.attachment.FileName));

は、あなたは私がここでの問題を見つける助けてくださいもらえますか？ ありがとうございました！あなたはファイルをアップロードしたい場合は、フォームにenctype="multipart/form-data"属性を追加する必要があり

<form action="/Postal/Send?enctype=multipart%2Fform-data" method="post"> 
    <div class="validation-summary-valid" data-valmsg-summary="true"> 
     <ul> 
      <li style="display:none"></li> 
     </ul> 
    </div> 
    <p> 
     <label for="name">Name</label> 
     <input data-val="true" data-val-required="Name is required!" id="name" name="name" size="35" type="text" value="" /> 
     <span class="field-validation-valid" data-valmsg-for="name" data-valmsg-replace="false">*</span> 
    </p> 
    <p> 
     <label for="email">Email Address</label> 
     <input data-val="true" data-val-regex="Email Address is not valid." data-val-regex-pattern="[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}" data-val-required="Email Address is required!" id="email" name="email" size="35" type="text" value="" /> 
     <span class="field-validation-valid" data-valmsg-for="email" data-valmsg-replace="false">*</span> 
    </p> 
    <p> 
     <label for="subject">Subject</label> 
     <select id="subject" name="subject"> 
      <option value="NT Indicator Quote">NT Indicator Quote</option> 
      <option value="NT Strategy Quote">NT Strategy Quote</option> 
      <option value="Comments">Comments</option> 
      <option value="other">other</option> 
     </select> 
     <span class="field-validation-valid" data-valmsg-for="subject" data-valmsg-replace="false">*</span> 
    </p> 
    <p> 
     <label for="message">Message</label> 
     <textarea cols="50" data-val="true" data-val-length="The field Message must be a string with a maximum length of 1500." data-val-length-max="1500" data-val-required="Message is required!" id="message" name="message" rows="10"> 
     </textarea> 
     <span class="field-validation-valid" data-valmsg-for="message" data-valmsg-replace="false">*</span> 
    </p> 
    <p> 
     <label for="attachment">attachment</label> 
     <input id="attachment" name="attachment" type="file" value="" /> 
     <span class="field-validation-valid" data-valmsg-for="attachment" data-valmsg-replace="true"></span> 
    </p> 
    <p> 
     <input type="submit" id="submit" name="submit" value="Submit" /> 
    </p> 
</form> <!-- End form --> 

    </div> 

Answer 1

：ここ

は、ビュー・ソースからHTMLで

@using (Html.BeginForm("Send", "Postal", FormMethod.Post, new { enctype = "multipart/form-data" })) 
{ 
    ... 
} 

もすることで、このblog postをチェックアウトHaacked。