Using A File Upload
This example shows how to upload an image file to a file server and save it in a web friendly format. There are two parts to this - an HTML form which contains an file input box and an Active Server Page to decode the uploaded file and save it as something web friendly.
1
HTML for the form

The HTML for your form should appear something like the following. Note that we are using a multipart encoding, something which is required if you are using the input file-type form element.

[HTML] <form method="post" action="upload.aspx" name="submit" enctype="multipart/form-data">
Choose a file to upload:<br>
<input type="file" name="filefield" size="40"> <br>
<input type="submit" name="submit" value="submit"> lt;br>
</form>
2
Decoding the Data

Your upload.aspx page should contain code to decode the uploaded file and save it out in a web friendly format. First we find the physical path to the place we are going to save the file.

[C#] string path = Server.MapPath("../images/picture.jpg");


[Visual Basic] Dim path As String
path = Server.MapPath("../images/picture.jpg")


Next we get the uploaded information out of the request. Here we use the standard .NET upload classes but for more control over the upload process you can use ABCUpload.

[C#] HttpPostedFile field = Request.Files("filefield");


[Visual Basic] Dim field As HttpPostedFile
field = Request.Files("filefield")
3
Drawing the Data

Finally we create a Canvas, draw the binary data onto it and save the result out in the location we identified earlier.

[C#] Canvas canvas = new Canvas();
canvas.DrawImage(XImage.FromStream(field.FileName, field.InputStream), new DrawOptions());
canvas.SaveAs(path);


[Visual Basic] Dim canvas As New Canvas
Dim drawOpts As New DrawOptions
canvas.DrawImage(XImage.FromStream(field.FileName, field.InputStream), drawOpts)
canvas.SaveAs(path)