Blazor Parameter Or CascadingParameter Set Property Calling many time

Question

Hello ,

Please Check Below Image

Here in CascadingParameter Set Call Multiple Times , Why?
I also Try Parameter But same things Happened .
How We stop this Continuous Calling Without Any Flag, Please Kindly Suggest

Answer 1

Hi Kuldeep Singh 

Thank you for reaching out to Microsoft Q & A forum.

This behavior is expected when Blazor sets [Parameter] and [CascadingParameter] values multiple times during component rendering and updates. 

To prevent FileProcess() from being called repeatedly, it’s best to move the logic to the OnParametersSet() method and check if the value has changed: 

[CascadingParameter] private string displayRes { get; set; }
private string _prevDisplayRes;
protected override void OnParametersSet()
{
    if (displayRes != _prevDisplayRes)
    {
        _prevDisplayRes = displayRes;
        FileProcess();
    }
}

This approach ensures the method runs only when necessary.      

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