Thank you for looking into this issue, please find enclosed sample projects for 15.2 and 13.1. We are able to see the difference between the two versions. In our application, it's worse.

Thanks,

Crystal.

Hi Lindos, 

That's great that you narrowed it down. Build 2118 might be your best best, then. I am not even sure if there were any service releases in between those two, or if they are still available. 

I took a quick look at the history of the code for 15.2, but I can't narrow it down by control, only by assembly, and most of the code for the FormattedTextEditor is in the Win assembly, which has a ton of changes for that time period, so nothing really jumped out at me. 

If you can provide a smaple that I can run and debug that demonstrates the problem, I can definitely narrow down the exact change or bug fix that fixed it, though. 

Oh... I just checked and apparently 2118 was the only Service release for v15.2. 

Also, to answer your question, all of the versions are always backward compatible (aside from the occasion breaking change that has to be made for a bug fix).

But you can't mix versions. All of the Infragistics assemblies need to be the same version. 

Hi Mike,

Thanks for looking further into this issue and for answering my questions about the version compatibility.

I will continue to attempt to try and reproduce the issue in a sample app.

If I can get the sample app to show the issue, and you are able to track down the cause to a bug in 2052 that was fixed with 2118, what would be your recommended next steps in getting this fixed in our production code? Do you provide small patches/hot fixes for such occasions? Or, would we ultimately need to do a full upgrade to 2118?

Thanks,

Lindos.

Hi Lindos, 

Well, since 2118 is the only service release for 15.2, there aren't a lot of options. There's no real middle ground here. 

The best we could hope for is that if you are able to reproduce the issue in a sample, and I can track down exactly what change fixed it (which I am pretty sure I can), then it's possible that I could find a workaround that you could implement in your code and you would not need to update your Infragistics assemblies at all - you could just fix it in your own code and that would be the most limited possible change. 

Of course, it's also possible that there is no way to work around the issue in your code - that the problem is buried deep in the control and there's no way you can get around it. In which case, the best option for you would be to update to 2118.

Hi Mike,

While I was migrating our production code over to the sample application, I came upon the code where we build the HTML for the FormattedTextEditor. We keep our images as embedded resources in the project and use the following syntax for embedding the image in the cell:

var encodedImg = FormattedLinkEditor.EncodeImage(Properties.Resources.ImageX);
var html = $"<img data="{encodedImg}" />";
ultraDataRow["Column1"] = html;

I recalled that there is an alternate way of adding images to the cell by using the src tag, with a file path to the image, and tested the following in the production code:

var html = @"<img src=""C:\Test\Imagex.png""/>";;
ultraDataRow["Column1"] = html;

The performance issue immediately went away using the src tag. It seemed to even be more performant than the "fixed" 2118 SR version using the data tag. It looks like the issue is in rendering the image using the data tag. The images being loaded are all 16x16 32 bit png around 660 bytes, nothing huge.

I have implemented a work around for the performance issue in the production code by using the src tag and putting all the images in a folder on disk instead of embedding them as a resource. While this isn't a perfect solution, I believe it will work as a patch to our code for our customers as this will have minimal impact on regression testing.

Is there any way of loading the images from embedded resources and using them with the src tag instead of loading them from disk? This would remove the dependency of having the images deployed to disk and read from there. Do you see anything out of the ordinary with how we're using the data tag with an encoded embedded resource?

If you have any other suggestions, that would be greatly appreciated.

Thanks,

Lindos.

The value of the field in the DataRow is being set when we update the UltraDataSource for the grid. This happens as we navigate from one business object to the next (the grid data is refreshed for each business object by first clearing the rows collection in the UltraDataSource). The code spins through a collection (the row data) in the business object and calls the UltraDataSource objects Rows.Add() method for each new row. Each new DataRow's column values are then updated. After all the data has been loaded we don't update it any further. From this point on (until the next business object is loaded) the data remains static.

In what event are you setting the value of the field in the DataRow. I assume that's done before you bind to the grid. Or are you dynamically building or changing the data as you scroll, like in the InitializeRow event of the grid or something?

Okay, that makes sense. Not sure why I was confused - it seems perfectly obvious from the code, now. 

Hi Mike,

Clarifying what ImageX is.

In the Visual Studio project, a Resource file (Resources.resx) is added to the project under the Properties folder. Opening up the Resource file in Visual Studio you can select the Images section from the dropdown. The Images are added to this section by drag and drop from Windows Explorer where the image filename becomes the key in the Resource file. The Resource file has a build action of Embedded Resource.

The embedded images are referenced from the Resource file in code using the following:

var image = Properties.Resources.ImageX;

Where ImageX is the name of the image in the resource file.

We did discuss keeping the images as is, embedded in a resource file, and writing them to disk at the time they were needed. This option was ultimately rejected due to business needs and the decision to deploy the images up front in a folder was made.

If I can reproduce the issue in a sample project I will definitely send it your way.

Thanks for your help.

Lindos.