Multiple files from 2 or more file upload controls

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Dears,

I 've a situation here in uploading multiple files from multiple controls in asp.net mvc.

How can i differentiate (grouping) between files of each file upload controls?

In HTML:
Here is the uploaders:

HTML

<input type="file" name="AdditionalDocs" class="form-control" id="AdditionalDocs" multiple>

<input type="file" name="BudgetDocs" class="form-control" id="BudgetDocs" multiple>

<input type="file" name="TimelineDocs" class="form-control" id="TimelineDocs" multiple>

in server side:

C#

for (int i = 0; i < Request.Files.Count; i++)
{
    HttpPostedFileBase file = Request.Files[i];
    if (file.ContentLength > 0)
    {        
        lstAttachments.Add(new AttachmentDTO
        {
            FileName = file.FileName,
            MimeType = file.ContentType,
            FileContent = data
        });               
    }
}

After that i got all files but not categprized.

Any Ideas to categorize these files?

What I have tried:

I tried depending on file name while categorizing these files but may be the file name is repeated.

Posted 31-Oct-18 23:10pm

_ProgProg_

Updated 2-Nov-18 5:55am

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2 solutions

Solution 1

Pretty sure this won't work:

FileContent = data

Since data doesn't change inside your loop, you will get the same file content (if any) for every file. I think you need to access the file.Content Stream in order to use it...

Posted 31-Oct-18 23:44pm

OriginalGriff

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Richard Deeming · Accepted Answer · 2018-11-02T05:56:00

Use HttpFileCollectionBase.GetMultiple[^] to retrieve the list of posted files for each input:

C#

IList<HttpPostedFileBase> additionalDocs = Request.Files.GetMultiple("AdditionalDocs");
IList<HttpPostedFileBase> budgetDocs = Request.Files.GetMultiple("BudgetDocs");
IList<HttpPostedFileBase> timelineDocs = Request.Files.GetMultiple("TimelineDocs");

You can then process the files from each list separately.