private void DataGrid1_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            string c=e.CommandName;
            int PermissionsID =(int)this.DataGrid1.DataKeys[e.Item.ItemIndex];
            string Permissions=e.Item.Cells[1].Text.Trim();
            switch(c)
            {
                case "Delete":
                    if(Permissions!="�ʻ�����")
                    {
                        Permissions p=new Permissions();
                        p.Delete(PermissionsID);
                        PermissionsDatabind();
                    }
                    else
                    {
                        Response.Write("<script>alert('�Բ���,����ɾ�����Ȩ��,�����޷�����Ȩ�޹���!');</script>");
                    }
                    break;
                case "Edit":
                    //this.TabEdit.Visible=true;
                    //this.lblPermId.Text=PermissionsID.ToString();
                    //this.txtNewName.Text=Permissions;
                    break;

            }
        }