GridViwe编辑取消

    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    ...{//编辑
        this.GridView1.EditIndex = e.NewEditIndex;
        int areaid = Convert.ToInt32(this.DropDownList1.SelectedValue);
        this.GridView1.DataSource = city.GetCityByArea(areaid);
        this.GridView1.DataBind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    ...{//取消
        this.GridView1.EditIndex = -1;
        int areaid = Convert.ToInt32(this.DropDownList1.SelectedValue);
        this.GridView1.DataSource = city.GetCityByArea(areaid);
        this.GridView1.DataBind();
    }