使用哪些策略在大型数据集上实现预先输入类型自动完成？

I am a .NET WinForms/ASP.NET developer with what I think of as technology agnostic questions about how to implement "type-ahead auto-completion" on a large data set. If someone could point me to a reference implementation or detailed discussion, that would be great, but here are my questions:I am a .NET WinForms/ASP.NET developer with wha