To select a date at runtime we use the calendar control.
The calender control in asp.net is used to select a date very easily.
Recommended For You
ASP.NET Tutorial: How to use an AdRotator control for rotating advertisements in a webpage
Passing values from html page to aspx page – ASP.NET Tutorial 
ASP.NET : Checkbox field within a gridview or datagrid – Asp .Net using C# 
File Uploading and save it in a folder in ASP.NET using C#, File uploading and saving. 
ASP.NET Tutorials: How to use Datagrid Control To Display Database
ASP.NET Tutorials: Insert Data into database using LINQ