Reports

Going to explain issue step by step :

Step 1 : You have an entity with a nullable bool? property.

Step 2 : Scaffolding generated <InputCheckbox @bind-Value="VendorDataFile.IsLicensed" />.

Step 3 : You see compiler errors, because:

- InputCheckbox only supports bool, not bool?.

- The bind expression assumes it is bool.

Step 4 : Changing to just @bind suppresses compiler errors, but leads to a runtime exception, because InputCheckbox needs a valid ValueExpression.

Solution as per below :

If you're not allowed to change the model, the best approach is to map the nullable value to a non-nullable one temporarily in the UI, and then sync it back.   
   
@code {   
    private bool isLicensed   
    {   
        get =\> VendorDataFile.IsLicensed ?? false; // default to false   
        set =\> VendorDataFile.IsLicensed = value;   
    }   
}   
   
Then change the checkbox code to:   
   
\<div class="mb-3"\>   
\<label for="islicensed" class="form-label"\>IsLicensed:\</label\>   
\<InputCheckbox id="islicensed" @bind-Value="isLicensed" class="form-check-input" /\>   
\<ValidationMessage For="() =\> VendorDataFile.IsLicensed" class="text-danger" /\>   
\</div\>

This avoids runtime issues by using a non-nullable proxy (isLicensed) for a nullable property (IsLicensed).

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