The data filtering function support is built in the ASP.NET Ajax Data Grid view Control. It allows users process data filtering in any columns. When users click in the filter cell, the cell editor will be open and will allow users set the filter condition. When clicking the filtering icon in the filter cell, a menu will be open and provide filter conditions including greater than, contains, less than, equals to, and more. Kettic asp.net grid view allows users to set filter control in many styles and format, you can define filter control as dropdown list, textbox, combobox, checkbox and so on. Developers can also customize the filtering features in C# code in ASP.NET WebForms projects.
To enable the filtering, set the the AllowFilteringByColumn property to True, and then you can view the wanted information filtered. Please try free online grid filter on this page. You can change this feature in design property windows or code in C# language programmatically.
ASP.NET AJAX UI Controls