Adding rows to Datatable and Binding it ASP.Net GridView

I have not saved it anywhere

Then how will it work. After adding rows you will need to store the dataset in Viewstate so that it is not lost

//Store after adding rows
ViewState["Data"] = ds;
Response.Redirect(Request.Url.AbsoluteUri);

//Get and bind to GridView
if(!IsPostBack)
{
DataSet ds = ViewState["Data"]  != null ? (DataSet)ViewState["Data"] : new DateSet();
GridView1.DataSource = ds;
GridView1.DataBind();
}

suchitra says:

http://www.aspsnippets.com/Articles/Add-record-to-Database-using-ASP.Net-GridView-EmptyDataTemplate-and-FooterTemplate.aspx

This link adds only to database

I am creating a Data Table in code and at a click event i am allowing to add only 1 row which will be added to DATATABLE

Later again after  adding one more row data it will again save to DATA TABLE. In DATA TABLE now there will be 2 rows which should be displayed when binded to gridview

 

 

Perhaps you're looking to something like this: http://www.aspsnippets.com/Articles/Adding-Dynamic-Rows-in-ASP.Net-GridView-Control-with-TextBoxes.aspx

I am adding rows temprorily to DATA TABLE not to dataset

Just change DataSet to DataTable in the code I gave. Everything will remain same