How to insert datetime (from a textbox date string) into database on dynamically created rows??

Hi there, I have this gridview which can dynamically create rows which i followed using these examples
http://www.aspsnippets.com/Articles/Adding-Dynamic-Rows-in-ASP.Net-GridView-Control-with-TextBoxes.aspx
http://www.aspsnippets.com/Articles/Adding-Dynamic-Rows-in-ASP.NET-GridView-Control-with-TextBoxes-and-with-Delete-functionality.aspx
Now i need to insert the values into the database which is from a string to a datetime format. I tried writing something like this but it doesn't work.
private void InsertRecordsActionItem(StringCollection sc) { string strConnString = ConfigurationManager.ConnectionStrings["emaDB2"].ConnectionString; SAConnecti ...