DataTable Rows visible false

Your requirement is not clear one. Datatable are in memory elements. I hope you want to hide the particular row of the datatable when binding it to the gridview or some other databound controls. If so, you need to set the column in datatable like "IsVisible" based on the column value you can show or hide the data in the particular databound control.

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        protected void gview_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if(e.Row.RowType == DataControlRowType.DataRow)
            {
                // This is the column which is bind from "IsVisible" column from Datatable
                if(e.Row.Cells[0].Text == "Hidden")
                {
                    e.Row.Visible = false;
                }
            }
        }
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