Retrieving unique (distinct) values from a dataset to populate a dropdown in Radzento populate a dropdown using Radzen

Radzen Studio Blazor Server
1

I need to retrieve unique values from an invoke to populate a dropdown in Radzen UI. I know I can filter and sort but not sure where to provide the Distinct() clause to produce the correct linq query.

2

Here is an example with the first DropDown in our demo:

<RadzenDropDown AllowFiltering="true" AllowClear="true" 
  Data="@(customers.Select(c => new { CustomerID = c.CustomerID, CompanyName = c.CompanyName }).Distinct())" 
  TextProperty="CompanyName" ValueProperty="CustomerID"  />
3

Thanks for the response, I was thinking of your Radzen tool with the auto-generated code.

radzen_edit
radzen_edit.png1095×644 33.6 KB
How would I go about making the change here to bring back unique values from the call to getMonitoredSystems

4

You can add for example custom method to return distinct values and use it with "Invoke Method" action: Invoke custom methods

6

Updated Radzen and that error went away.

7

Hi @enchev How it should Look insert the Code from Yours demo to custom metod? We have the same issue.