存储过程的调用和Parameters数组的调用

记录一些杂记吧

 declare @d datetime
 set @d=GETDATE()

 select * from [ACC_B2B].[dbo].ORDER_Head --where 1=1

 select datediff(ms,@d,getdate()) --2453 --2406

 给查询条件加上where 1=1 速度会快一点；

where 1=1

更多详细的看看这个sql语句中where 1=1和1=0的作用

里面的1=0快速建表：create table newtable as select * from oldtable where 1=0; 创建一个新表，而新表的结构与查询的表的结构是一样的。

 引用地址：http://www.398588.com/Article/T5/46.aspx
 返回一个存储过程的返回值。
 方法代码：
 public int SqlParm(string cmdText,SqlParameter[] Prams) 
 　  {
 　　　  SqlConnection Conn = new SqlConnection(ConfigurationManager.ConnectionStrings[].ConnectionString);
 　　　  Conn.Open();
 　　　  SqlCommand Cmd = new SqlCommand(cmdText, Conn);
 　　　  Cmd.CommandType = CommandType.StoredProcedure;
 　　　  foreach (SqlParameter P in Prams) 
 　　　  {
 　　　　　  Cmd.Parameters.Add(P);
 　　　  }
 　　　  Cmd.Parameters.Add(new SqlParameter("Return", SqlDbType.Int, 4, ParameterDirection.ReturnValue, false, 0, 0, string.Empty, DataRowVersion.Default, null));
 　　　  Cmd.ExecuteNonQuery();
 　　　  int RowNum = int.Parse(Cmd.Parameters["Return"].Value.ToString());
 　　　  return RowNum;
 　  }
 调用方法代码：
   SqlParameter[] Paramrs={new SqlParameter("@Q",SqlDbType.VarChar,50)};
   Paramrs[].Value = "abc"; //给＠Q值。
 　Response.Write(SqlParm("过程名称",Paramrs);
 以上仅供参考，本站原创文章，如有转载请带链接注明出自 网络自由人

 1           SqlParameter[] paras=
 2             {
 3                new SqlParameter("@name","这里应该放@name的类型")
 4             };
 5             SqlParameter parm = new SqlParameter("select_Con", "73468969715");
 6             DataTable myset = ExecuteStoredProcedure("select_Con", parm);

SqlParameter

现在，我们要改写这样的语句，使用SqlParameter来做

SqlCommand SqlCmd = new SqlCommand(sql, SqlConn);

SqlParameter _userid = new SqlParameter("uid", SqlDbType.Int);

_userid.Value = Request.QueryString["u_id"];

SqlCmd.Parameters.Add(_userid);

　　

    public static DataTable ExecuteStoredProcedure(string ProcNme, params SqlParameter[] paramemters)
         {
             SqlDataReader reader = null;
             DataTable dt = new DataTable();
             using (SqlConnection conn=new SqlConnection(ConfigurationManager.ConnectionStrings["Connection B2B"].ToString()))
             {
                 conn.Open();
                 using (SqlCommand cmd=conn.CreateCommand())
                 {
                     SqlTransaction st = conn.BeginTransaction();
                     cmd.Transaction = st;
                     try
                     {
                         cmd.CommandText = ProcNme;// 存储过程与Command牵连在一起了
                         cmd.CommandType = CommandType.StoredProcedure;//command执行的类型是存储过程，不再是sql语句

                         cmd.Parameters.AddRange(paramemters);
                         reader = cmd.ExecuteReader();//返回发的是DataReader 下面的方法将reader转成datatable
                       dt=   ConvertDataReaderToDataTable(reader);
                       return dt;

                       //cmd.Parameters.AddRange(paras);
                       //SqlDataAdapter da = new SqlDataAdapter();
                       //da.SelectCommand = cmd;
                       //DataSet ds = new DataSet();
                       //da.Fill(ds, "StuInfo");
                       //dataGridView1.DataSource = ds.Tables["StuInfo"];
                     }
                     catch (Exception)
                     {

                         throw;
                     }
                 }
             }
         }

         public static DataTable ConvertDataReaderToDataTable(SqlDataReader reader)
         {
             try
             {
                 DataTable objDataTable = new DataTable();
                 int intFieldCount = reader.FieldCount;
                 for (int intCounter = 0; intCounter < intFieldCount; ++intCounter)
                 {
                     objDataTable.Columns.Add(reader.GetName(intCounter), reader.GetFieldType(intCounter));
                 }

                 objDataTable.BeginLoadData();

                 object[] objValues = new object[intFieldCount];
                 while (reader.Read())
                 {
                     reader.GetValues(objValues);
                     objDataTable.LoadDataRow(objValues, true);
                 }
                 reader.Close();
                 objDataTable.EndLoadData();

                 return objDataTable;

             }
             catch (Exception ex)
             {
                 throw new Exception("转换出错!", ex);
             }

         }

   public override bool ValidateUser(string username, string password)
         {
             SqlConnection sqlconn = new SqlConnection("Data Source=12345;Initial Catalog=TestDB01;Integrated Security=True");
             SqlCommand sqlcmd = new SqlCommand("select UserID, UserName from [UserInfo] where UserName = @userName and UserAge = @userAge", sqlconn);
             try
             {
                 sqlconn.Open();
                 sqlcmd.Parameters.Add(new SqlParameter("@userName", SqlDbType.NVarChar, 50));
11             sqlcmd.Parameters["@userName"].Value = username.Trim();
12             sqlcmd.Parameters.Add(new SqlParameter("@userAge", SqlDbType.SmallInt, 2));
13             sqlcmd.Parameters["@userAge"].Value = password;

                 SqlDataReader sqlRd = sqlcmd.ExecuteReader();
                 if (sqlRd.HasRows)
                 {
                     return true;
                 }

                 return false;
             }
             catch (Exception ex)
             {
                 throw new Exception(ex.Message);
             }
         }

 public static DataTable SpReturnTable(string storedProcName, SqlParameter[] parameters, string connstring)
        {
            try
            {
                using (SqlConnection conStr = new SqlConnection(connstring))
                {
                    DataTable dt = new DataTable();
                    conStr.Open();
                    SqlTransaction trans = null; //创建事务
                    trans = conStr.BeginTransaction();
                    try
                    {
                        SqlCommand comStr = new SqlCommand(storedProcName, conStr);
                        comStr.Transaction = trans;
                        comStr.CommandType = CommandType.StoredProcedure; //设置执行类型为存储过程
                        foreach (SqlParameter parameter in parameters)
                        {
                            comStr.Parameters.Add(parameter);
                        }
                        using (SqlDataAdapter sda = new SqlDataAdapter())
                        {
                            sda.SelectCommand = comStr;
                            sda.Fill(dt);
                        }
                        trans.Commit(); //提交事务
                        return dt;
                    }
                    catch (Exception ex)
                    {
                        string a = ex.Message;
                        trans.Rollback(); //回滚事务
                        return null;
                    }
                    finally
                    {
                        conStr.Close();
                    }
                }
            }
            catch (Exception ex)
            {
                return null;
            }
        }