protected void btnAddFeedBack_Click(object sender, EventArgs e)
{
string feedback = Convert.ToString(txtFeedback.Text);
string user_name = Session["USER_NAME"] as string;
objDataHandling.SaveFeedback(user_name, feedback);
string script = "alert('" + "Feedback submitted Successfully" + "');";
ScriptManager.RegisterStartupScript(this, typeof(Page), "UserSecurity", script, true);
Response.Redirect(Request.RawUrl);
objDataHandling.showFeedbackGrid(grdFeedback);
}