migrating desktop app(delphi) to web app(C# Asp.Net)

Take a look at VCL.JS it's a brand new environment that use typescript for frontend and Delphi component concept. All under visual studio environment plginn.

And with c# backend.

An example for a component usage :

var qur = new V.TQuery(this);
qur.SQL = "Select * from customers";
qur.open();

var in = V.TDBInput(this,'itm');
in.DataSet = qur;
in.FieldName = "FirstName"

http://vcljs.com