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DataGrid: saving settings + virtualization + sorting a column = System.ArgumentNullException #660

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opened 2026-01-29 17:41:09 +00:00 by claunia · 0 comments
claunia commented 2026-01-29 17:41:09 +00:00
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Originally created by @Alex55040 on GitHub (Dec 6, 2022).

  1. Use the following example as a base
    https://blazor.radzen.com/datagrid-save-settings

The issue appears even without saving and loading the settings - just using only the bound settings property.

  1. Add virtualization as described here
    https://blazor.radzen.com/datagrid-virtualization-loaddata

  2. Now try to order some column - you'll get the System.ArgumentNullException inside the browser (MS Edge):

Error: System.ArgumentNullException: Value cannot be null. (Parameter 'source')
at Microsoft.AspNetCore.Components.Web.Virtualization.Virtualize`1.BuildRenderTree(RenderTreeBuilder builder)
at Microsoft.AspNetCore.Components.ComponentBase.<.ctor>b__6_0(RenderTreeBuilder builder)
at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)

  1. Then set AllowVirtualization to "false", or remove @bind-Settings="@Settings" - the exception is gone. Filtering doesn't throw the exception.
Originally created by @Alex55040 on GitHub (Dec 6, 2022). 1. Use the following example as a base https://blazor.radzen.com/datagrid-save-settings The issue appears even without saving and loading the settings - just using only the bound settings property. 2. Add virtualization as described here https://blazor.radzen.com/datagrid-virtualization-loaddata 3. Now try to order some column - you'll get the System.ArgumentNullException inside the browser (MS Edge): Error: System.ArgumentNullException: Value cannot be null. (Parameter 'source') at Microsoft.AspNetCore.Components.Web.Virtualization.Virtualize`1.BuildRenderTree(RenderTreeBuilder builder) at Microsoft.AspNetCore.Components.ComponentBase.<.ctor>b__6_0(RenderTreeBuilder builder) at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException) 4. Then set AllowVirtualization to "false", or remove @bind-Settings="@Settings" - the exception is gone. Filtering doesn't throw the exception.
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Reference: starred/radzen-blazor#660
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