How to set default value to asp textbox in radgrid while the texbox is data binded

How to set default value to asp textbox in radgrid while the texbox is
data binded

References

Reference NO 1

http://stackoverflow.com/questions/13651718/how-to-set-default-value-to-asp-textbox-in-radgrid-while-the-texbox-is-data-bind

Reference NO 2

http://stackoverflow.com/questions/13198219/textbox-bind-default-value

Reference NO 3

http://stackoverflow.com/questions/4111493/radgrid-column-editable-on-insert-but-set-to-readonly-on-update

Reference NO 4

http://www.telerik.com/community/forums/aspnet-ajax/grid/default-insert-value-for-radgrid.aspx

Reference NO 5

http://forums.devx.com/showthread.php?157324-ASP-NET-2-Textbox-value-in-Gridview-row

Reference NO 6

http://msdn.microsoft.com/en-us/library/bb426882.aspx

Reference NO 7

http://www.c-sharpcorner.com/UploadFile/rohatash/how-to-get-the-selected-row-in-gridview-using-Asp-Net/

Reference NO 8

http://forums.asp.net/t/1076706.aspx