编辑错在那里

public partial class g_xwgll : System.Web.UI.Page
{
    int news_id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            bd(GridView1);
        
        }
    }
    public void bd(GridView gr)
    {
        DataSet dt = new DataSet();
        dt = comclass.gg.Query("select * from g_new_info");
        gr.DataSource = dt.Tables[0].DefaultView;
        gr.DataBind();
    
    
    }    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        ///<sumary>
        ///删除会员信息
        ///<sumary>
        ///<sumary>
        ///获取id值
        ///<sumary>
    
        DataSet dt = new DataSet();
        dt = comclass.gg.Query("delect from g_new_info where news_id=news_id");
        GridView1.DataSource = dt.Tables["g_new_info"].DefaultView;
        GridView1.DataBind();
        bd(GridView1);
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        bd(GridView1);
    }
    protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
    {
        DataSet dt = new DataSet();
      
        TextBox news_class = (TextBox)GridView1.Rows[0].Cells[0].Controls[0];
        TextBox news_title = (TextBox)GridView1.Rows[0].Cells[1].Controls[0];
        TextBox news_date = (TextBox)GridView1.Rows[0].Cells[2].Controls[0];
        TextBox news_image = (TextBox)GridView1.Rows[0].Cells[3].Controls[0];
        TextBox news_cartid = (TextBox)GridView1.Rows[0].Cells[4].Controls[0];
        TextBox news_video = (TextBox)GridView1.Rows[0].Cells[5].Controls[0];
        TextBox news_content = (TextBox)GridView1.Rows[0].Cells[6].Controls[0];
        dt = comclass.gg.Query("update g_new_info set where news_id="+news_id);
        GridView1.DataSource = dt.Tables[0].DefaultView;
        GridView1.DataBind();
        GridView1.EditIndex = -1;
        bd(GridView1);    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        bd(GridView1);
    }
}