数据库 为什么没更新？

namespace WebApplication1{    public class SQLClass    {        protected string SqlStr;  //数据库字符串        public SqlConnection SqlCON; //数据库连接变量        public SQLClass()        {            SqlStr = "server=JINLANG;database=ChatWeb;uid=sa;pwd=programmsdn";        }        /// <summary>        /// 数据库打开        /// </summary>        public void open()        {            if (SqlCON == null)            {                SqlCON = new SqlConnection(SqlStr);                SqlCON.Open();            }            else if(SqlCON.State.Equals(ConnectionState.Closed))            {                SqlCON.Open();            }        }        /// <summary>        /// 数据库关闭        /// </summary>        public void close()        {             if(SqlCON.State.Equals(ConnectionState.Open))            {                SqlCON.Close();            }        }       public bool  Databaseoperation(string StrCOM)        {            SqlCommand com = new SqlCommand(StrCOM, SqlCON);                        try            {                bool num = Convert.ToBoolean(com.ExecuteNonQuery());                return num;            }            catch            {                return false;            }            finally            {                close();            }        }       public SqlDataReader ExceRead(string sqlcom)       {           open();           SqlCommand com = new SqlCommand(sqlcom,SqlCON );           SqlDataReader read = com.ExecuteReader();  //创建数据阅读器           return read;       }    }}

 string TSlr = "insert into BookTable values('"+TextBoxBookName.Text.Trim()+"','"+Convert.ToInt32(TextBoxBookNUM.Text.Trim())+"','"+Convert.ToInt32(TextBoxBookPrice.Text.Trim())+"')";            SQLClass sqlclass = new SQLClass();            sqlclass.open();            bool LRresult = sqlclass.Databaseoperation(TSlr);            if (LRresult)            {                sqlclass.close();                Response.Write("<script language=javascript>alert('录入成功');location='BookLR.aspx'</script>");            }            else            {                sqlclass.close();                Response.Write("<script language=javascript>alert('录入失败');location='BookLR.aspx'</script>");            }

SQLClass sqlclass = new SQLClass();            sqlclass.open();            SqlDataAdapter adp = new SqlDataAdapter("select * from BookTable",sqlclass.SqlCON);            DataSet ds = new DataSet();            int counter = adp.Fill(ds,"BookTable");            Response.Write("共获取" + counter + "条数据" + "<a href='BookLR.aspx'>录入新图书</a>"+"<br/>");            foreach (DataRow mydr in ds.Tables["BookTable"].Rows)            {                               Response.Write(mydr["ID"].ToString()+"  "+mydr["BookNmae"].ToString()+"  "+mydr["BookNUM"].ToString()+"   "+mydr["BookPrice"].ToString()+"<a href='TSxiugai.aspx?shuming="+mydr["BookNmae"].ToString()+"&shuliang="+mydr["BookNUM"].ToString()+"&jiage="+mydr["BookPrice"].ToString()+"'>修改</a>"+"<br/>");            }

public partial class TSxiugai : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {            TextBoxSM.Text=Request.QueryString["shuming"];            TextBoxSL.Text=Request.QueryString["shuliang"];            TextBoxJG.Text=Request.QueryString["jiage"];        }        protected void Button1_Click(object sender, EventArgs e)        {            string Strxiugai = "update BookTable set BookNmae='"+TextBoxSM.Text.Trim()+"',BookNUM='"+Convert.ToInt32(TextBoxSL.Text.Trim())+"',BookPrice='"+Convert.ToInt32(TextBoxJG.Text.Trim())+"' where BookNmae='"+Request.QueryString["shuming"]+"' ";            SQLClass sqlclass = new SQLClass();            sqlclass.open();            bool XGresult = sqlclass.Databaseoperation(Strxiugai);            if (XGresult)            {                sqlclass.close();                Response.Write("<script language=javascript>alert('修改成功');location='BookList.aspx'</script>");            }            else            {                sqlclass.close();                Response.Write("<script language=javascrip>alert('修改失败');location='TSxiugai.aspx'</script>");            }        }    }