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Bug: DataGrid filtering with "CheckBoxList with OData" on null navigation properties not working #1838

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opened 2026-01-29 17:59:15 +00:00 by claunia · 0 comments
claunia commented 2026-01-29 17:59:15 +00:00
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Originally created by @agateeno on GitHub (Aug 13, 2025).

Describe the bug
Filtering a column with CheckboxList using OData with a nullable navigation property causes error, crashing the application

To Reproduce
Using the "CheckboxList with OData" example, edit the source:

  • creating a new column in line 19
    <RadzenDataGridColumn Property="Employee.Employee1.LastName" Title="Employee1Demo" />
  • edit the line 39
    var result = await service.GetOrders(filter: args.Filter, top: args.Top, skip: args.Skip, orderby: args.OrderBy, count: true, expand: "Customer,Employee($expand=Employee1)");

Expected behavior
Just like Excel, if there are null values, the first filter value should be "(null)", so the end user could get all rows with null

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Originally created by @agateeno on GitHub (Aug 13, 2025). **Describe the bug** Filtering a column with CheckboxList using OData with a nullable navigation property causes error, crashing the application **To Reproduce** Using the "CheckboxList with OData" example, edit the source: - creating a new column in line 19 `<RadzenDataGridColumn Property="Employee.Employee1.LastName" Title="Employee1Demo" />` - edit the line 39 `var result = await service.GetOrders(filter: args.Filter, top: args.Top, skip: args.Skip, orderby: args.OrderBy, count: true, expand: "Customer,Employee($expand=Employee1)");` **Expected behavior** Just like Excel, if there are null values, the first filter value should be "(null)", so the end user could get all rows with null **Screenshots** <img width="1891" height="855" alt="Image" src="https://github.com/user-attachments/assets/2f594190-1424-44f2-a303-f04780882bab" /> <img width="1433" height="464" alt="Image" src="https://github.com/user-attachments/assets/b228d57a-98ba-4f04-bafd-8b4d68f4e1c1" />
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Reference: starred/radzen-blazor#1838
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