Blazor Page Navigation and Parameter Passing - is there a best practice?

[MMock]

I don't know if there's a right answer to this or if it's a matter of preference.

I need to have conditonal HTML on a page. It is going to decide what kind of DevExpress Blazor controls to render. I am display communications systems. Some of our customers have radios so I'll display TX and RX frequencies. Others have consoles where I'll display the console type. So I want to have conditional logic determining what the system type is and create the appropriate controls.

My question - is it "better" to pass in the system type from the previous page (I am already passing in the SystemDataControl #), or have the current page that will have the conditional logic discover what the system type is? Either way it's a database call but IDK if it's better to come into the page having all I need (two arguments) or give the page the minimum one argument and have it get the rest.

[MMock]

So I thought I would try it one way to at least test my conditional code rendering. So I am trying to pass two parameters instead of one.
Passing one worked, it looked like this minus what I put in bold on the last line. This file is NavMenu.razor.

<DxTreeView AllowSelectNodes="true" CssClass="app-sidebar">
    <Nodes>
        <DxTreeViewNode NavigateUrl="./" Text="Overview" CssClass="@rootNodeCssClass"></DxTreeViewNode>
            <DxTreeViewNode NavigateUrl="grid" Text="Grid" CssClass="@rootNodeCssClass"></DxTreeViewNode>
            <DxTreeViewNode NavigateUrl="choosecustomer3" Text="Choose Customer Grid" CssClass="@rootNodeCssClass"></DxTreeViewNode>
            <DxTreeViewNode NavigateUrl="systemdatadetails/3187,radio" Text="System Data Details" CssClass="@rootNodeCssClass"></DxTreeViewNode>
        </Nodes>
</DxTreeView>

But now there's a second parameter. I am trying to tell SystemDataDetails.razor to render the "radio" code. I get a very unclear "object reference not set to an instance" in _Host.cshtml with the addition of the "radio" parameter.

[MMock]

I don't need an answer anymore. I missed the most obvious and easy way to do this! When I come into the page that has conditional rendering, I get the row from the database that is the system. I can just ask what the "Console" is at that point.

    protected override async Task OnInitializedAsync()
    {
        customerSystem = await _db.GetSystemBySDC(Convert.ToInt32(sdcvalue2));

        // 4 is radio, 2 is BDA
        if (customerSystem.Console == 4)
        {
            systemType = "Radio";

        radioSystemsData = new()
            {
                DataDescription = customerSystem.DataDescription,
                OwnerID = customerSystem.OwnerID,
                SystemDataControl = customerSystem.SystemDataControl,
                TXPL = customerSystem.TXPL,
                TXFrequency = customerSystem.TXFrequency,
                TXPLType = customerSystem.TXPLType
            };
        }
        else
        {
            systemType = "BDA";


        bdaSystemsData = new()
            {
                DataDescription = customerSystem.DataDescription,
                OwnerID = customerSystem.OwnerID,
                SystemDataControl = customerSystem.SystemDataControl,
            };
        }
    }