Issue in Uploading multiple files using c#

Question

I am trying to upload multiple files, (selecting multiple files in a single click and upload). For that I am using the following code. I am doing this in MVC4

@using (Html.BeginForm("Gallery", "Admin", FormMethod.Post, new  {enctype="multipart/form-data", id = "GalleryForm" }))
{
    @Html.ValidationSummary();

    <div> Select the files to Upload<br /> <input type="file" name="file" id="file" multiple="multiple" /><br /><br /></div>
    <div><input type="submit" name="submit" Value="Save"/></div>
}

Controller

[HttpPost]
public ActionResult Gallery(IEnumerable<HttpPostedFileBase> files)
{
    foreach (var file in files)
    {
        if (file.ContentLength > 0)
        {
            var fileName = Path.GetFileName(file.FileName);
            var path = Path.Combine(Server.MapPath("~/Images/Gallery/"), fileName);
            file.SaveAs(path);
         }
    }
    return RedirectToAction("Index");
}

If I select more than one file, I got the error "Maximum request length exceeded" and when I select single file and try to upload then, I got the error "Object reference not set to an instance of an object". Actually, I want to upload single and multiple files using this same form. How will this be possible. Please help me. Thanks in advance.

More info required: What line of the code shown is giving the error? It's probably the foreach.. files that is null because the parameter name doesn't match . See also this question: http://stackoverflow.com/questions/8356506/how-to-write-html-beginform-in-razor and http://stackoverflow.com/questions/4232347/multiple-file-upload-using-request-filesfiles-mvc — David d C e Freitas, Dec 16 '13 at 05:36
@DaviddCeFreitas: i want to upload more than one file using "Single input control" — neel, Dec 16 '13 at 05:45

score 1 · Answer 1 · answered Dec 16 '13 at 12:57

Rename your name attribute of input type file

<input type="file" name="files" id="file" multiple="multiple" />

for second error i.e maximunn length exceed change in web config

<configuration>
    <system.web>
        <httpRuntime maxRequestLength="1048576" />
    </system.web>
</configuration>

For IIS7 and above, you also need to add the lines below:

<system.webServer>
   <security>
      <requestFiltering>
         <requestLimits maxAllowedContentLength="1073741824" />
      </requestFiltering>
   </security>
 </system.webServer>

Note: maxAllowedContentLength is measured in bytes while maxRequestLength is measured in kilobytes, which is why the values differ in this config example. (Both are equivalent to 1 GB.)

David d C e Freitas · Answer 2 · 2013-12-16T22:54:42.400

0

Your parameter name doesn't match your form input element name, you should use "file" or "files" in both the code behind and the html. name="file" should be name="files".

edited Dec 16 '13 at 22:54

answered Dec 16 '13 at 05:32

David d C e Freitas

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some times i want to upload more than one files using this input control. but this code only allow to upload a single file – neel Dec 16 '13 at 05:43

Issue in Uploading multiple files using c#

2 Answers2