Hi, It seems MSDN does not have sufficient documentation on IExtractImage ( shell extension for generating custom thumbnail). So far, I already. The IExtractImage interface is used to request a thumbnail image from a Shell C# Definition: You can use this enum for the IExtractImage. I believe nearly all IExtractImage samples (you find searching) are based on this article’s code, due to naming convention, comments, and so on, that are carried.

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Icons and Icon Overlays. The following table gives some examples of the relationship between requested size and available size.

An thumbnail solution – CodeProject

For example, a text file’s thumbnail should show a miniature version of the document, including its text. Still, since you mentioned Works-For-Me tmI guess.

Many answers seem to be centered around web page iiextractimage, or scaling an image. I have also set a sliding expiration of mins minutes. Overlays are declared in the registry as part of the file association entry as shown here:.

Thanks for testing it. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Ying Ming 7-Feb Collapse the table of content. Thanks for the sample project, AMissico. It’s unfortunate the bevels will ixetractimage work on a rectangle. Here are the properties of the ThumbList user control: MSDN coverage is thin with no sample code.


I did some basic testing, and there are garbage collection issues, freeing unmanaged resource issues, and other clean-up issues. I would like use bitmap stream from service. To enable this, cached thumbnails are associated with a iextractimave returned by the GetUniqueThumbName function.

On a bit OS, this is an issue since the managed Int32 is really just bits. Andrew Gale 54 1 7. The Extract has IntPtr parameter.

You can declare a cutoff point as part of the file association entry in the registry. Would that be difficult? I found a better solution to avoid the double databinding by exploiting the RegisterClientScriptBlock function of the Page class.

Windows is responsible for respecting the original aspect ratio and padding the image to a square size. Note also that in the previous version of this thumbnail control i c the DataList EnableViewState property set to ‘false’ and this prevented the update command to be executed.

To dereference, I needed to get the unsafe pointer via IntPtr.

However, IExtractImage is not supported in the Details pane. Nope, you’re right – it’s not what I’m looking for: Set to a value above 0 to define a current page. I started this project after reading the very good ASP.

An ASP.NET thumbnail solution

Do not apply overlays yourself. Here’s the code to get the image: Red Flag This Post Please let us know here why this post is inappropriate. I don’t know how to call the function However i had to databind again to show the page that the user selected. Therefore, I make a strong recommendation to avoid the code in that article.


I found the source here: Since the properties of the ThumbList control may have changed by the calling page, BindThumbList is executed at every page load, except when the update command is executed. The thumbnail extractor is called if the image is not found in the cache.

Independently of these settings, the ASP. Articles Quick Answers Messages. A typical use of the handler is shown below. These thumbnails are provided by core and third-party shell extensions.

The code I posted as an answer actually works The only mandatory parameter. I have added useful features like paging and beveled thumbnails. See the code below some lines omitted for the implementation, may be you can use it to create a Web or Forms beveled button that draws itself based on parameters.

Enter in the Path textbox a path of an IIS virtual-directory containing images and press the ‘Regenerate thumbnails’ button. You can also opt out of running out of process by default by setting the DisableProcessIsolation entry in the registry as shown in this example.