using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient ;
using System.Data;
using System.Configuration;
using Wuqi.Webdiyer;
using Models;
namespace DAL
{
public class DBHelper
{
public static readonly string CONN_STRING = ConfigurationManager.ConnectionStrings["RyMedicalConnectionString"].ConnectionString;
public static SqlDataReader GetReader(string safeSql)
{
SqlConnection conn = new SqlConnection(CONN_STRING);
SqlCommand cmd = new SqlCommand(safeSql, conn);
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
reader.Close();
return reader;
}
public static SqlDataReader GetReader(string sql, params SqlParameter[] values)
{
SqlConnection conn = new SqlConnection(CONN_STRING);
SqlCommand cmd = new SqlCommand(sql, conn);
conn.Open();
cmd.Parameters.AddRange(values);
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
reader.Close();
conn.Close();
return reader;
}
public static DataTable GetDataSet(string safeSql)
{
SqlConnection conn = new SqlConnection(CONN_STRING);
DataSet ds = new DataSet();
SqlCommand cmd = new SqlCommand(safeSql, conn);
conn.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
conn.Close();
return ds.Tables[0];
}
public static DataTable GetDataSet(CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlConnection conn = new SqlConnection(CONN_STRING);
DataSet ds = new DataSet();
SqlCommand cmd = new SqlCommand(cmdText, conn);
conn.Open();
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
conn.Close();
return ds.Tables[0];
}
public static SqlDataReader ExecuteReader(CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(CONN_STRING);
conn.Open();
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
rdr.Close();
conn.Close();
return rdr;
}
public static object ExecuteScalar(CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(CONN_STRING))
{
conn.Open();
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
conn.Close();
return val;
}
}
public static object ExecuteScalar(SqlConnection conn, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
public static void ExecuteNonQuery(string sql)
{
SqlConnection conn = new SqlConnection(CONN_STRING);
SqlCommand cmd = new SqlCommand(sql,conn);
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
/// <summary>
/// 传入SQL语句,返回int
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public static int ExcuteCommand(string sql)
{
SqlConnection conn = new SqlConnection(CONN_STRING);
SqlCommand cmd = new SqlCommand(sql, conn);
conn.Open();
int result = cmd.ExecuteNonQuery();
conn.Close();
return result;
}
/// <summary>
///
/// </summary>
/// <param name="Name">需要分页的表明</param>
/// <param name="pk">主键名</param>
/// <param name="fields">需要取出的字段,留空则为*</param>
/// <param name="pagesize">每页的记录数</param>
/// <param name="CurrentPage">当前页</param>
/// <param name="Filter">条件，可以为空，不用填 where</param>
/// <param name="Group">分组依据，可以为空，不用填 group by</param>
/// <param name="order">排序，可以为空，为空默认按主键升序排列，不用填 order by</param>
/// <returns></returns>
public static DataTable Pagedlist(string Name, string pk, string fields, int pagesize, int CurrentPage, string Filter, string Group, string order)
{
CurrentPage = CurrentPage - 1;
DataTable dt = GetDataSet(CommandType.StoredProcedure, "fenye",
new SqlParameter("@TableNames", Name),
new SqlParameter("@PrimaryKey", pk),
new SqlParameter("@Fields", fields),
new SqlParameter("@PageSize", pagesize),
new SqlParameter("@CurrentPage", CurrentPage),
new SqlParameter("@Filter", Filter),
new SqlParameter("@Group", Group),
new SqlParameter("@Order", order)
);
return dt;
}
public static int fenye_num(string Name, string Filter)
{
return (int)ExecuteScalar(CommandType.StoredProcedure, "fenye_num",
new SqlParameter("@TableNames", Name),
new SqlParameter("@Filter", Filter));
}
/// <summary>
///
/// </summary>
/// <param name="Name">需要分页的表明</param>
/// <param name="pk">主键名</param>
/// <param name="fields">需要取出的字段,留空则为*</param>
/// <param name="pagesize">每页的记录数</param>
/// <param name="CurrentPage">当前页</param>
/// <param name="Filter">条件，可以为空，不用填 where</param>
/// <param name="Group">分组依据，可以为空，不用填 group by</param>
/// <param name="order">排序，可以为空，为空默认按主键升序排列，不用填 order by</param>
/// <param name="objanp">传递aspnetpager控件</param>
/// <returns></returns>
public static DataTable Paged(string Name, string pk, string fields, int pagesize, int CurrentPage, string Filter, string Group, string order, AspNetPager objanp)
{
CurrentPage = CurrentPage - 1;
DataTable dt = GetDataSet(CommandType.StoredProcedure, "fenye",
new SqlParameter("@TableNames", Name),
new SqlParameter("@PrimaryKey", pk),
new SqlParameter("@Fields", fields),
new SqlParameter("@PageSize", pagesize),
new SqlParameter("@CurrentPage", CurrentPage),
new SqlParameter("@Filter", Filter),
new SqlParameter("@Group", Group),
new SqlParameter("@Order", order)
);
objanp.RecordCount = fenye_num(Name, Filter);
return dt;
}
}
}
如此分页即可实现(下图),在任何项目中只需要COPY2个存储过程一个数据操作类,或者喜欢将数据类做成DLL也可以,在页面调用时传入参数只需一行代码即可.
