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POFile Dialog Throws a Null Reference When Cancelled
 

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  1. POFile Dialog Throws a Null Reference When Cancelled
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    <p>In my site that has a file upload function, the File Dialog returns a null reference when I don't select a file and click Cancel. But here's the catch:</p> <p>When the user: </p> <ol> <li><p>Open file dialog > select file > click Open, but thought maybe he selected the wrong file, so he -- > open file dialog > click Cancel, the file uploads successfully. But...</p></li> <li><p>On that same page, there's a button that allows you to edit the entry you just created. So maybe the user uploaded the wrong file, so he -- open file dialog > select file > click Open, but again thought maybe he selected the wrong file so he -- openfile dialog > click Cancel. The fun ends here as I get an <code>Object reference not set to an instance of an object</code> error.</p></li> </ol> <p>What confuses me is that it goes through the same code but the first time it's run it works and on the second it fails? </p> <p>BTW, I'm using Michiel Post's <a href="http://www.michielpost.nl/Silverlight/MultiFileUploader/" rel="nofollow">MultiFileUpload</a> project.</p> <p>The scenarios I've given runs through this code:</p> <pre><code>else { MultiFileUpload.SelectUserFiles(); //This calls the MultiFileUpload if (MultiFileUpload.UserFiles.FileList.LastOrDefault().FileName != refFileName) { //do something } else { //this is triggered when the user clicks Cancel on the FileDialog return; } } </code></pre> <p>Again, the code works for scenario number 1, but fails for scenario number 2 which obviously is just the same as 1.</p>
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    1. COThere is no way we can help you without seeing some code.
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    2. CODone adding code. Thanks!
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