Issue

Using any overload of ToDataSourceResult(Async) with a DataSourceRequest containing filter descriptors on an IQueryable provided by Entity Framework core 2.x, causes Entity Framework's "Query cache" to fill up for different filter values, leaking memory in the process. This is caused by using Expression.Constant in the generated expression trees for a DataSourceRequest's FilterDescriptors. Refer to https://github.com/dotnet/efcore/issues/14859 for more details about why this leaks memory.

Since Entity Framework's cache is always missed for new filter values, performance is also degraded due to this issue.

The issue is not present when using Entity Framework core 3 or greater. Apparently using Expression.Constant is not an issue on these version.

I have attached a minimal working example that illustrates the memory leak.

Fix

This issue can be fixed by changing FilterDescriptorExpressionBuilder.CreateValueExpression to not return a ConstantExpression, but a MemberExpression instead. Entity Framework 2.x will correctly parameterize the MemberExpression, causing the query cache to be hit correctly for queries that only differ in parameter values. It won't parameterize ConstantExpressions. Refer to https://stackoverflow.com/a/60516780/147993 for an example of generating a MemberExpression instead of a ConstantExpression.

According the the documentation a user should be able to use the keyboard to navigate out of the spreadsheet as deescribed here. However, this does not happen.

Steps to reproduce:

1. Open the Dojo - https://dojo.telerik.com/IvdWHNwo/2
2. Navigate or click in the last cell in the last row
3. Click Tab key.

Current behavior: The focus remains in the same cell.

Expected behavior: Teh second input should be focused.

The issue is a regression starting with version 2024.4.1112

The MCP assistant server currently supports Visual Studio, Visual Studio Code and Cursor.

Provide official support for Claude Code as well:

Hi Team,

I would like to request to add an Html/Tag Helper for the kendo.ui.icon.  

Thanks!

I'm using an OData datasource to populate the grid.  To make matters worse, the Autocomplete retrieves data for *all* of the grid columns.  I'd say the default behavior should only retrieve the current column's data and preferably use OData groupby to limit the results to distinct values.

Interestingly, the CheckBoxList filter *is* populated from the current grid data, behaving as expected.  

My page is attached and the issue is occurring in the detail grid where Server Filtering is disabled.

Serializing DataSourceResult when it contains several groups is significantly slower compared to serializing the object when no grouping is used. Consider ways to improve the performance. For more context and an example, see Ticket ID: 1677867.

It would be nice to extend dialog like office 365 right dialog ( docked to the right).

It would be nice to have a dropdown button with a container

In the example below products is actually DbSet<Product>

public async Task<ActionResult> Products_Read([DataSourceRequest]DataSourceRequest request)
{
    using (var northwind = new SampleEntities())
    {
        IQueryable<Product> products = northwind.Products;
        DataSourceResult result = await products.ToDataSourceResultAsync(request);
        return Json(result);
    }
}

Under the hood the ToDataSourceResultAsync call is executed inside Task.Run

And that Task.Run is calling sync methods of IQueryable which means EntityframeworkCore queries are not taking place with async I/O

Whilst I'm aware that I can create a HTML label and add the k-label class. I feel that a Label and a LabelFor are essential parts of the toolkit to prevent brittle code getting created when/if the labels that are created within the toolkit have other requirements

I have created my own implementation for now but I think this should be added to your roadmap, especially as it's such a simple thing to do

Add a 3 state mode to the Switch component (like it is already implemented in the Telerik UI for WPF) or create new component with that feature.

Example:

Would you be able to implement a more visual aspect for the FileManagement so it look close to this picture.

Attach is the modified Kendo.all.min.js file that you may want to alter so it becomes a permanent in you repository. Changes made for those following :

* Changed:
  *     template:
  *     var i
  *     singleFileTemplate

The style sheet for the effects:

/* 5.7.3 - Filemanager Image Grid View */
.FileManagerImgGridView {
    display: flex;
    justify-content: start;
    align-items: center;
    gap: 10px;
    cursor: zoom-in;
}
/* 5.7.4 - Filemanager Image List View */
.FileManagerImgListView {
    cursor: zoom-in;
    max-width: 115px;
    box-shadow: 0 0 10px rgba(0,0,0,0.4);
    transition-duration: .5s;
}

    .FileManagerImgListView:hover {
        transition-duration: .5s;
        transform: translateY(5px) scale(1.75);
        border-radius: 3px;
        z-index: 100;
    }

/* 5.7.5 - Filemanager Image Detail */
.FileManagerImgDetail {
    max-height: 280px;
    max-width: 280px;
    border-radius: 5px;
    box-shadow: 0 0 20px rgba(0,0,0,0.4);
    cursor: pointer;
    transition-duration: .5s;
}

    .FileManagerImgDetail:hover {
        transition-duration: .5s;
        transform: scale(1.2);
        max-width: 80%;
        border-radius: 50%;
        box-shadow: 0 0 20px rgba(0,0,0,0.4);
    }

.FileManagerImgDownloadLink {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-left: 10px;
    padding: 5px 10px;
    border-radius: 10px;
    color: var(--bs-primary-inverted);
    background-color: var(--bs-primary);
    box-shadow: 0 0 10px rgba(0 0 0 /.7);
    gap: 5px;
}

    .FileManagerImgDownloadLink a {
        text-decoration: none;
        color: var(--bs-primary-inverted);
    }

also here is the C# Thumbnail Class that can be modified if you intend to have you own fabrication of thumbnail as it use to be years ago :-)

using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Processing;

public virtual IActionResult Thumbnail(string path)
    {
        var virtualPath = Path.Combine(_thumbnailFolderRoot);
        var physicalPath = Path.Combine(ConstantVar.webEnv.WebRootPath, virtualPath.Replace('/', '\\'));
        path = Path.Combine(physicalPath, path);
        FileInfo imageInfo = new FileInfo(path);

        int width = 75;
        int height = 75;
        bool KeepRatio = true;

        using (Image image = Image.Load(imageInfo.FullName))
        {

            // Figure out the ratio
            double ratioX = (double)width / (double)image.Width;
            double ratioY = (double)height / (double)image.Height;
            // use whichever multiplier is smaller
            double ratio = ratioX < ratioY ? ratioX : ratioY;

            int newHeight = height;
            int newWidth = width;

            if (KeepRatio)
            {
                // now we can get the new height and width
                newHeight = Convert.ToInt32(image.Height * ratio);
                newWidth = Convert.ToInt32(image.Width * ratio);
            }

            image.Mutate(s => s.Resize(width: newWidth, height: newHeight));
            using (var ms = new MemoryStream())
            {
                image.SaveAsJpeg(ms);
                return File(ms.ToArray(), "image/jpg");
            }
        }
    }

 When uncheck "Use localization" while create project the Localization resources are still auto copied while publish the project.

The resources are part of the telerik.ui.for.aspnet.core.yyyy.q.mmdd.nupkg and therefore are copied to the bin folder regardless of the  "Use localization" option. The "Use localization" option controls the availability only of the messages files.

This a feature request for providing another lightweight NuGet which does not contain the localization dlls that could be used for non-localized projects.

When both UI for ASP.NET MVC and UI for ASP.NET Core Visual Studio extensions are installed and only UI for ASP.NET Core project is loaded, the notification for new version is shown for UI for ASP.NET MVC.