Question

This is code snippet is from blueimp File Upload. The <form action="FileTransferHandler.ashx" method="post" enctype="multipart/form-data"> does not seem o work for me.

I am using a master page. When i remove the <form action="FileTransferHandler.ashx" method="post" enctype="multipart/form-data"> from the page and add action="FileTransferHandler.ashx" method="post" enctype="multipart/form-data" to the form tag of the master page. It starts working. Why??

   <div id="fileupload">
        <form action="FileTransferHandler.ashx" method="post" enctype="multipart/form-data">
            <div class="fileupload-buttonbar">
                <label class="fileinput-button">
                    <span>Add files...</span>
                    <input type="file" name="files[]" multiple="multiple" />
                </label>
                <button type="button" class="delete button">Delete all files</button>
                <div class="fileupload-progressbar"></div>
            </div>
        </form>
        <div class="fileupload-content">
            <table class="files"></table>
        </div>
    </div>

Answer 1

As you noticed, the Master Page has a (server side) form. You cannot nest forms – which is what you are doing when you add (an additional) <form/> tag in the (content) page.

You can either –

• set a button’s PostBackUrl property to Post to some other target.

• use a different Master Page (or not use one at all) for the page