Cancel button is disable in the gridview when the delete but

Before binding the grid, u can check as follows...
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// Check whether gridview is empty or not from the dataset
// here ds is a dataset which holds values from database tables.
if (ds.Tables[0].Rows.Count == 0)
{
// Gridview is empty now.
// Add ur logic like below.
// The column no 6 (start from 0) is 'lnkadd'.
((TemplateField)grdBuglist.Columns[6]).Visible = true;
}
else
{
// Gridview is having data.
// The column no 7 is 'lnkedit' and 8 is 'lnkdelete'.
((TemplateField)grdBuglist.Columns[7]).Visible = true;
((TemplateField)grdBuglist.Columns[8]).Visible = true;
}
grdBuglist.DataBind();