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POCheck if there is any kind of PDF Reader installed
 

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    <p>I have a <code>Help</code> function in my <code>Application</code>, that consists of one <code>webbrowser control</code>. That <code>webbrowser control</code> gets filled with a <code>.pdf file</code>, the source for that <code>.pdf file</code> is our own website.</p> <p>The problem is, that not everyone will have a <code>PDF Reader</code> installed on their machine, so I want to check whether one is installed: Yes or No. I searched the internet and I mostly saw that users on Stackoverflow where wanting to check if <code>Adobe Reader</code> was installed, that is not what I want. I need to know IF there is a <code>PDF Reader</code> somewhere installed on the machine.</p> <p>I did find the following code, that can possibly help me:</p> <pre><code>public void CheckPdfReaderAvailable() { RegistryKey key = Registry.ClassesRoot.OpenSubKey(".pdf"); Assert.IsNotNull(key); } </code></pre> <p>As I look at the above code, my thoughts are that the code checks if the <code>registry</code> does know the <code>.pdf format</code>, but I'am not sure.</p> <p>Can somebody tell me how to use the code above or provide me an example, about how I should take down this problem?</p> <p>Thanks in advance!</p> <p><strong>EDIT:</strong></p> <p>The following answer helped my out: <a href="https://stackoverflow.com/a/774482/1661209">https://stackoverflow.com/a/774482/1661209</a></p> <p>Another way to solve this problem, is to add a pdf reader lite to the prerequisites and make the users install that first, you don't have to check for a pdf Reader, because you know one is installed then, if it isn't you could say it is the mistake of the user that they can't use the help function, because you offered them a way to install the pdf reader easily using the published project.</p>
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    1. COWhy not have HTML in a WebBrowser control? Why not just throw the PDF at the user and let them deal with it? What do you do if they don't have a PDF viewer installed?
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    2. COThat is my problem here, I want to check if a user has a PDF viewer installed: Yes or No, if not I will provide them a download link, so they can still make use of my help function.
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    3. COCheck this answer maybe it can help you or open a path for you [http://stackoverflow.com/questions/6086973/how-can-i-programmatically-check-file-that-a-file-association-exists-before-atte/6087057#6087057][1] [1]: http://stackoverflow.com/questions/6086973/how-can-i-programmatically-check-file-that-a-file-association-exists-before-atte/6087057#6087057
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