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Upload file

Posted on 2013-06-07
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Last Modified: 2013-06-12
Hi,

How can I modify the code to accept file from file upload control instead of hard coding as follows?

if (stlUtils.IsValidated(new string[] { @"c:\myfile.stl", ddlUnit.SelectedValue.ToString() }))

<asp:FileUpload ID="fuStlFile" runat="server" />

Please help.

ayha
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Question by:ayha1999
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Expert Comment

by:käµfm³d 👽
ID: 39231136
if (stlUtils.IsValidated(new string[] { fuStlFile.FileName, ddlUnit.SelectedValue.ToString() }))

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Author Comment

by:ayha1999
ID: 39231141
I tried both fuStlFile.FileName and fuStlFile.PostedFile.FileName but doesn't work.

the first one doesn't give any result, the other one gives an error

The process cannot access the file 'C:\myFile.stl' because it is being used by another process.
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Expert Comment

by:käµfm³d 👽
ID: 39231146
What is your goal? What are you attempting to do with the uploaded file?
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Author Comment

by:ayha1999
ID: 39231153
calculating the volume of the file

        public double CalculateVolume2(string unit)
        {
            br = new BinaryReader(File.Open(_filename, FileMode.Open));
            byte[] buffer = new byte[128];

            br.Read(buffer, 0, 80);
...
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Accepted Solution

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käµfm³d   👽 earned 250 total points
ID: 39231172
The filename is more of a convenience for you, the developer, to know what the user had named the file (on their machine). That name doesn't exist on your machine--unless you write that file out to disk, and name it with that same name.

It appears that you are trying to get the bytes of the file. The good new for you is that the FileUpload control already provides you this via the FileBytes property. Simply modify you class a tad to have a new class-level member:

public class YourClass
{
    private byte[] _fileData;
...

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...and then assign the file bytes to this new member wherever you are assigning the filename.

e.g.

...

public void SomeMethod()
{
    this._filename = fuStlFile.FileName;
    this._fileData = fuStlFile.FileBytes;
}

...

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Then you can use this data within your other method:

public double CalculateVolume2(string unit)
{
    // use this._fileData here...it's already a byte array
    ...

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Expert Comment

by:Julian Hansen
ID: 39231214
@Kaufmed

He is trying to merge the code from here http://www.experts-exchange.com/Programming/Languages/Scripting/Python/Q_28149820.html#a39229038
Into a file upload program.

System takes a .STL file and calculates the volume of the object described in the STL.

What he is looking for is how to take the uploaded file and pass it through to the STL class so it can process it based on the code in the above link.
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Author Comment

by:ayha1999
ID: 39231221
this solution works


            fuStlFile.SaveAs(Server.MapPath("/files/"  + filename));

            if (stlUtils.IsValidated(new string[] {@Server.MapPath("/files/"+ filename), unit }))
            {
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Expert Comment

by:käµfm³d 👽
ID: 39231835
OK, but I still don't see why you'd write the bytes out to file just to read them back again--unless of course you need a copy of the file for some other reason. Just pass the byte array around.
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Expert Comment

by:Julian Hansen
ID: 39231848
@kaufmed - did I miss the bit where he is writing out to a file?
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Expert Comment

by:käµfm³d 👽
ID: 39232007
Two posts up.
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Expert Comment

by:Julian Hansen
ID: 39232569
I think that is just saving the uploaded file so it can be used by the STL class to calculate the volume of the object in the file ?
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Expert Comment

by:käµfm³d 👽
ID: 39233026
I think that is just saving the uploaded file...
Exactly my point. If you don't need a copy of the file for archival purposes, why write it out to disk at all? If you do need a copy, then the point is moot.
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Author Closing Comment

by:ayha1999
ID: 39241443
Thanks
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