Hi Yuan,
Thanks for taking interest in GroupDocs.Viewer for .NET.
I am writing inline answers of each of your questions.
<span style=“color: rgb(76, 82, 89); font-family: “PT Sans”, Helvetica, Arial, sans-serif; font-size: 14px; background-color: rgb(221, 221, 221);”>However, nothing is displayed on the screen! Is this just a UI-less backend API? Am I doing something wrong?
Yes, GroupDocs.Viewer for .NET is a back-end document processing API that renders the
supported document formats into HTML pages or images. These HTML pages or images can be viewed using some front end application such as a web application.
<span style=“color: rgb(76, 82, 89); font-family: “PT Sans”, Helvetica, Arial, sans-serif; font-size: 14px; background-color: rgb(221, 221, 221);”>Since we have not got a trial license, Is this a trial limit?
Yes,
trial limitations will be applied if you use the API in trial mode. However, you can get a free
temporary license (valid for 30 days) to evaluate all the features of GroupDocs.Viewer without any limitations.
<span style=“color: rgb(76, 82, 89); font-family: “PT Sans”, Helvetica, Arial, sans-serif; font-size: 14px; background-color: rgb(221, 221, 221);”>What should I do after I got a .jpg Image file?
If you are using image based rendering then each page of the source document will be rendered into an image. You can use your front end application to view these rendered .jpg images.
<p class=“MsoNormal” style=“margin: 0in 0in 0.0001pt; font-stretch: normal; font-size: 14px; line-height: 18px; font-family: “PT Sans”, Helvetica, Arial, sans-serif; color: rgb(76, 82, 89);”>
Do you have a complete example I can follow so that <o:p></o:p><p class=“MsoNormal” style=“margin: 0in 0in 0.0001pt; font-stretch: normal; font-size: 14px; line-height: 18px; font-family: “PT Sans”, Helvetica, Arial, sans-serif; color: rgb(76, 82, 89);”>
I can see a thumb nail image on the left and a full document on the right?<o:p></o:p><p class=“MsoNormal” style=“margin: 0in 0in 0.0001pt; font-stretch: normal; font-size: 14px; line-height: 18px; font-family: “PT Sans”, Helvetica, Arial, sans-serif; color: rgb(76, 82, 89);”><o:p style=“background-color: rgb(211, 211, 211);”>We like what we see when running your groupdocs.viewer in the </o:p>
<p class=“MsoNormal” style=“margin: 0in 0in 0.0001pt; font-stretch: normal; font-size: 14px; line-height: 18px; font-family: “PT Sans”, Helvetica, Arial, sans-serif; color: rgb(76, 82, 89);”><o:p style=“background-color: rgb(211, 211, 211);”>
http://apps.groupdocs.com/document-viewer
.</o:p>
<p class=“MsoNormal” style=“margin: 0in 0in 0.0001pt; font-stretch: normal; font-size: 14px; line-height: 18px; font-family: “PT Sans”, Helvetica, Arial, sans-serif; color: rgb(76, 82, 89);”><o:p style=“background-color: rgb(211, 211, 211);”>That is exactly what we want. If we can do so, I am sure we are going to buy your viewer.</o:p>
Yes. We have also developed some open source front end document viewer applications using GroupDocs.Viewer for .NET. You can download these applications and modify them as per your requirements. Listed below are the applications along with their download links.
If you will have any issues or questions, please feel free to write us back.
Warm Regards