Dynamically pass ID of a control to a C# function on onchange event

I am converting an existing ASP.NET application into Blazor app.

I have this form

<table width='400px' style="border-width:2" ><!-- Start Hub table <tr><td>Role</td><td>Name</td><td>Phone</td><td>email / mobile</td></tr><tr><td style="width:140px;">Event Hub Manager</td><td><input id="block1_role1_names" @onchange=@(async(e) => await update_details("block1_role1_names", e)) value="@getContact("block1_role1_names")" class="NameColumn" /></td><td  style="width:80px;">3664 8462</td><td><input id="block1_role1_phone" @onchange=@(async(e) => await update_details("block1_role1_phone", e)) value="@getContact("block1_role1_phone")" class="PhoneColumn" /></td></tr></table>

When page loads, I call a function "getContact" and pass the id of the control and it loads value from a json file.When I make any update in a text box, I call "update_details" and pass the id of the control and write into a json file.

protected async Task update_details(string controlId, ChangeEventArgs controlEvent){    //save into json based on id and vaule}private string getContact(string Id){    return "get from josn file based on id";}

It is all working fine.

I have more than 50 rows and for every row, I have 2 text boxes and to get values of those 2 boxes, I have to pass IDs.

I don't want to manually pass IDs into functions, I want something dynamic, every textbox has its own Id, so onchange and value function should take that ID as a parameter, something like this

<input id="block1_role1_names" @onchange=@(async(e) => await update_details(ID_OF_THE_CONTROL, e)) value="@getContact(ID_OF_THE_CONTROL)" class="NameColumn" />

How can I pass the ID of the textbox into those 2 functions?When I tried passing "this", this refers to the page and not the textbox.