ASP.Net中怎样获得存储过程传出的参数。

//-------------------------------------------------------------------------------
//测试获得存储过程传出的参数
//OLEDB方式，测试通过
//-------------------------------------------------------------------------------
   OleDbCommand myCommand=new OleDbCommand();
   myCommand.Connection=cn;
   if(cn.State== ConnectionState.Closed){
    cn.Open();
   }
   myCommand.CommandText="ShowCmdTest";
   myCommand.CommandType=System.Data.CommandType.StoredProcedure;
   myCommand.CommandTimeout = 20;

   OleDbParameter inPara=new OleDbParameter("@inA",OleDbType.VarChar,80);
   inPara.Value="5";
   inPara.Direction=ParameterDirection.Input;
   myCommand.Parameters.Add(inPara);
   OleDbParameter outPara=new OleDbParameter("@outB",OleDbType.VarChar,80);
   outPara.Direction=ParameterDirection.Output;
   myCommand.Parameters.Add(outPara);
   myCommand.ExecuteNonQuery();
   Response.Write(outPara.Value);
   OleDbDataReader myReader = myCommand.ExecuteReader();
   DataTable dt = new DataTable();
   dt.Columns.Add("SubjectName");
   dt.Columns.Add("CreateDate");
   while(myReader.Read())
   {
    DataRow workRow = dt.NewRow();
    workRow["SubjectName"] = myReader.GetValue(1);
    workRow["CreateDate"] = myReader.GetValue(2);
    dt.Rows.Add(workRow);
    //Response.Write(myReader.GetValue(0).ToString()+"<br>");
   }
   myReader.Close();
   //BindGrid();
   MyDataGrid.DataSource = dt.DefaultView;// myReader;
   MyDataGrid.DataBind();

//-------------------------------------------------------------------------------
//测试获得存储过程传出的参数
//SqlClient方式，测试通过
//-------------------------------------------------------------------------------
   //连接数据库
   SqlConnection sqlconn=new SqlConnection();
   sqlconn.ConnectionString="server=192.168.3.80;uid=sa;Password=rain;database=MyStudy";
   //server=192.168.3.80;uid=sa;Password=rain;database=MyStudy";
   sqlconn.Open();
   SqlCommand com=new SqlCommand();
   com.Connection=sqlconn;

   com.CommandText="ShowCmdTest";
   com.CommandType=CommandType.StoredProcedure;
   SqlParameter[] p_htno=new SqlParameter[2];
   p_htno[0] = new SqlParameter("@inA",SqlDbType.VarChar,80);
   p_htno[1] = new SqlParameter("@outB",SqlDbType.VarChar,80);
   p_htno[0].Value ="测试输入";  
   p_htno[1].Direction=ParameterDirection.Output;
   //p_htno[1].Value = this.drop_character.Items[this.drop_character.SelectedIndex].Value;

   for ( int i =0 ;i< p_htno.Length;i++)
   {
    com.Parameters.Add(p_htno[i]);
   }
   com.ExecuteNonQuery();
   Response.Write(p_htno[1].Value.ToString()+"<br>测试输出成功！");