using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Reflection; /// <summary>
/// 数据库助手
/// @浅时光
/// #[email protected]
/// </summary> namespace Checkup
{
public class DBHelper
{ //连接字符串
static string strConn = ConfigurationManager.ConnectionStrings["mssql"].ToString(); #region 执行查询，返回DataTable对象----------------------- public static DataTable GetTable(string strSQL)
{
return GetTable(strSQL, null);
}
public static DataTable GetTable(string strSQL, SqlParameter[] pas)
{
return GetTable(strSQL, pas, CommandType.Text);
}
/// <summary>
/// 执行查询，返回DataTable对象
/// </summary>
/// <param name="strSQL">sql语句</param>
/// <param name="pas">参数数组</param>
/// <param name="cmdtype">Command类型</param>
/// <returns>DataTable对象</returns>
public static DataTable GetTable(string strSQL, SqlParameter[] pas, CommandType cmdtype)
{
DataTable dt = new DataTable(); ;
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlDataAdapter da = new SqlDataAdapter(strSQL, conn);
da.SelectCommand.CommandType = cmdtype;
if (pas != null)
{
da.SelectCommand.Parameters.AddRange(pas);
}
da.Fill(dt);
}
return dt;
} #endregion #region 执行查询，返回DataSet对象------------------------- public static DataSet GetDataSet(string strSQL)
{
return GetDataSet(strSQL, null);
} public static DataSet GetDataSet(string strSQL, SqlParameter[] pas)
{
return GetDataSet(strSQL, pas, CommandType.Text);
}
/// <summary>
/// 执行查询，返回DataSet对象
/// </summary>
/// <param name="strSQL">sql语句</param>
/// <param name="pas">参数数组</param>
/// <param name="cmdtype">Command类型</param>
/// <returns>DataSet对象</returns>
public static DataSet GetDataSet(string strSQL, SqlParameter[] pas, CommandType cmdtype)
{
DataSet dt = new DataSet(); ;
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlDataAdapter da = new SqlDataAdapter(strSQL, conn);
da.SelectCommand.CommandType = cmdtype;
if (pas != null)
{
da.SelectCommand.Parameters.AddRange(pas);
}
da.Fill(dt);
}
return dt;
}
#endregion #region 执行查询，返回List<T>对象------------------------- /// <summary>
///
/// </summary>
/// <typeparam name="T">转换类型</typeparam>
/// <param name="strSQL">sql</param>
/// <param name="tableIndex">需要转换表的索引</param>
/// <returns></returns>
public static T GetObject<T>(string strSQL)
{
SqlDataReader sdr = GetReader(strSQL);
try
{
if (sdr.Read())
{
//创建泛型对象
T _t = Activator.CreateInstance<T>();
//获取对象所有属性
PropertyInfo[] propertyInfo = _t.GetType().GetProperties();
for (int j = ; j < sdr.FieldCount; j++)
{
foreach (PropertyInfo info in propertyInfo)
{
//属性名称和列名相同时赋值
if (sdr.GetName(j).ToUpper().Equals(info.Name.ToUpper()))
{
if (sdr[j] != DBNull.Value)
{
info.SetValue(_t, sdr[j], null);
}
else
{
info.SetValue(_t, null, null);
}
break;
}
}
}
return _t; }
else {
return default(T);
}
}
catch (Exception ee) {
Console.WriteLine("<>" + ee.Message);
}
return default(T);
}
/// <summary>
/// DataSetToList List
/// </summary>
/// <typeparam name="T">转换类型</typeparam>
/// <param name="strSQL">sql</param>
/// <param name="tableIndex">需要转换表的索引</param>
/// <returns></returns>
public static IList<T> GetList<T>(string strSQL, int tableIndex)
{
DataSet dataSet = GetDataSet(strSQL, null);
//确认参数有效
if (dataSet == null || dataSet.Tables.Count <= || tableIndex < )
return null; DataTable dt = dataSet.Tables[tableIndex]; IList<T> list = new List<T>(); for (int i = ; i < dt.Rows.Count; i++)
{
//创建泛型对象
T _t = Activator.CreateInstance<T>();
//获取对象所有属性
PropertyInfo[] propertyInfo = _t.GetType().GetProperties();
for (int j = ; j < dt.Columns.Count; j++)
{
foreach (PropertyInfo info in propertyInfo)
{
//属性名称和列名相同时赋值
if (dt.Columns[j].ColumnName.ToUpper().Equals(info.Name.ToUpper()))
{
if (dt.Rows[i][j] != DBNull.Value)
{
info.SetValue(_t, dt.Rows[i][j], null);
}
else
{
info.SetValue(_t, null, null);
}
break;
}
}
}
list.Add(_t);
}
return list;
} #endregion #region 执行非查询存储过程和SQL语句----------------------------- public static int ExcuteProc(string ProcName)
{
return ExcuteSQL(ProcName, null, CommandType.StoredProcedure);
} public static int ExcuteProc(string ProcName, SqlParameter[] pars)
{
return ExcuteSQL(ProcName, pars, CommandType.StoredProcedure);
} public static int ExcuteSQL(string strSQL)
{
return ExcuteSQL(strSQL, null);
} public static int ExcuteSQL(string strSQL, SqlParameter[] paras)
{
return ExcuteSQL(strSQL, paras, CommandType.Text);
} /// 执行非查询存储过程和SQL语句
/// 增、删、改
/// </summary>
/// <param name="strSQL">要执行的SQL语句</param>
/// <param name="paras">参数列表，没有参数填入null</param>
/// <param name="cmdType">Command类型</param>
/// <returns>返回影响行数</returns>
public static int ExcuteSQL(string strSQL, SqlParameter[] paras, CommandType cmdType)
{
int i = ;
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlCommand cmd = new SqlCommand(strSQL, conn);
cmd.CommandType = cmdType;
if (paras != null)
{
cmd.Parameters.AddRange(paras);
}
conn.Open();
i = cmd.ExecuteNonQuery();
conn.Close();
}
return i; } #endregion #region 执行查询返回第一行，第一列--------------------------------- public static int ExcuteScalarSQL(string strSQL)
{
return ExcuteScalarSQL(strSQL, null);
} public static int ExcuteScalarSQL(string strSQL, SqlParameter[] paras)
{
return ExcuteScalarSQL(strSQL, paras, CommandType.Text);
}
public static int ExcuteScalarProc(string strSQL, SqlParameter[] paras)
{
return ExcuteScalarSQL(strSQL, paras, CommandType.StoredProcedure);
}
/// <summary>
/// 执行SQL语句，返回第一行，第一列
/// </summary>
/// <param name="strSQL">要执行的SQL语句</param>
/// <param name="paras">参数列表，没有参数填入null</param>
/// <returns>返回影响行数</returns>
public static int ExcuteScalarSQL(string strSQL, SqlParameter[] paras, CommandType cmdType)
{
int i = ;
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlCommand cmd = new SqlCommand(strSQL, conn);
cmd.CommandType = cmdType;
if (paras != null)
{
cmd.Parameters.AddRange(paras);
}
conn.Open();
i = Convert.ToInt32(cmd.ExecuteScalar());
conn.Close();
}
return i; } #endregion #region 查询获取单个值------------------------------------ /// <summary>
/// 调用不带参数的存储过程获取单个值
/// </summary>
/// <param name="ProcName"></param>
/// <returns></returns>
public static object GetObjectByProc(string ProcName)
{
return GetObjectByProc(ProcName, null);
}
/// <summary>
/// 调用带参数的存储过程获取单个值
/// </summary>
/// <param name="ProcName"></param>
/// <param name="paras"></param>
/// <returns></returns>
public static object GetObjectByProc(string ProcName, SqlParameter[] paras)
{
return GetObject(ProcName, paras, CommandType.StoredProcedure);
}
/// <summary>
/// 根据sql语句获取单个值
/// </summary>
/// <param name="strSQL"></param>
/// <returns></returns>
public static object GetObject(string strSQL)
{
return GetObject(strSQL, null);
}
/// <summary>
/// 根据sql语句 和 参数数组获取单个值
/// </summary>
/// <param name="strSQL"></param>
/// <param name="paras"></param>
/// <returns></returns>
public static object GetObject(string strSQL, SqlParameter[] paras)
{
return GetObject(strSQL, paras, CommandType.Text);
} /// <summary>
/// 执行SQL语句，返回首行首列
/// </summary>
/// <param name="strSQL">要执行的SQL语句</param>
/// <param name="paras">参数列表，没有参数填入null</param>
/// <returns>返回的首行首列</returns>
public static object GetObject(string strSQL, SqlParameter[] paras, CommandType cmdtype)
{
object o = null;
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlCommand cmd = new SqlCommand(strSQL, conn);
cmd.CommandType = cmdtype;
if (paras != null)
{
cmd.Parameters.AddRange(paras); } conn.Open();
o = cmd.ExecuteScalar();
conn.Close();
}
return o; } #endregion #region 查询获取DataReader------------------------------------ /// <summary>
/// 调用不带参数的存储过程，返回DataReader对象
/// </summary>
/// <param name="procName">存储过程名称</param>
/// <returns>DataReader对象</returns>
public static SqlDataReader GetReaderByProc(string procName)
{
return GetReaderByProc(procName, null);
}
/// <summary>
/// 调用带有参数的存储过程，返回DataReader对象
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="paras">参数数组</param>
/// <returns>DataReader对象</returns>
public static SqlDataReader GetReaderByProc(string procName, SqlParameter[] paras)
{
return GetReader(procName, paras, CommandType.StoredProcedure);
}
/// <summary>
/// 根据sql语句返回DataReader对象
/// </summary>
/// <param name="strSQL">sql语句</param>
/// <returns>DataReader对象</returns>
public static SqlDataReader GetReader(string strSQL)
{
return GetReader(strSQL, null);
}
/// <summary>
/// 根据sql语句和参数返回DataReader对象
/// </summary>
/// <param name="strSQL">sql语句</param>
/// <param name="paras">参数数组</param>
/// <returns>DataReader对象</returns>
public static SqlDataReader GetReader(string strSQL, SqlParameter[] paras)
{
return GetReader(strSQL, paras, CommandType.Text);
}
/// <summary>
/// 查询SQL语句获取DataReader
/// </summary>
/// <param name="strSQL">查询的SQL语句</param>
/// <param name="paras">参数列表，没有参数填入null</param>
/// <returns>查询到的DataReader（关闭该对象的时候，自动关闭连接）</returns>
public static SqlDataReader GetReader(string strSQL, SqlParameter[] paras, CommandType cmdtype)
{
SqlDataReader sqldr = null;
SqlConnection conn = new SqlConnection(strConn);
SqlCommand cmd = new SqlCommand(strSQL, conn);
cmd.CommandType = cmdtype;
if (paras != null)
{
cmd.Parameters.AddRange(paras);
}
conn.Open();
//CommandBehavior.CloseConnection的作用是如果关联的DataReader对象关闭，则连接自动关闭
sqldr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return sqldr;
}
public static string Inf() {
SqlConnection conn = new SqlConnection(strConn); SqlCommand MyCommand = new SqlCommand("USERAUTH", conn);
//MyCommand.CommandType = CommandType.StoredProcedure;
//MyCommand.Parameters.Add(new SqlParameter("@id", SqlDbType.Int));
//MyCommand.Parameters["@id"].Value = 3;
//MyCommand.Parameters.Add(new SqlParameter("@inpass", SqlDbType.NVarChar));
//MyCommand.Parameters["@inpass"].Value = "3";
MyCommand.Parameters.AddWithValue("@id", ); //给输入参数赋值
MyCommand.Parameters.AddWithValue("@inpass", ""); //给输入参数赋值
MyCommand.Parameters.Add(new SqlParameter("@ret", SqlDbType.NVarChar));
MyCommand.Parameters["@ret"].Direction = ParameterDirection.ReturnValue;
conn.Open();
MyCommand.ExecuteNonQuery();
Console.WriteLine(MyCommand.Parameters["@ret"].Value.ToString());
return "succ";
}
//存储过程
public static object ExcuteNonQuery_Proc_Output(string procName, SqlParameter[] parameters, string outName)
{
SqlConnection conn = new SqlConnection(strConn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = procName;
for (int i = ; i < parameters.Length; i++)
{
cmd.Parameters.Add(parameters[i]);
}
conn.Open();
int n = cmd.ExecuteNonQuery();
object o = cmd.Parameters[outName].Value;
conn.Close();
return o;
} #endregion #region 批量插入数据--------------------------------------------- /// <summary>
/// 往数据库中批量插入数据
/// </summary>
/// <param name="sourceDt">数据源表</param>
/// <param name="targetTable">服务器上目标表</param>
public static void BulkToDB(DataTable sourceDt, string targetTable)
{
SqlConnection conn = new SqlConnection(strConn);
SqlBulkCopy bulkCopy = new SqlBulkCopy(conn); //用其它源的数据有效批量加载sql server表中
bulkCopy.DestinationTableName = targetTable; //服务器上目标表的名称
bulkCopy.BatchSize = sourceDt.Rows.Count; //每一批次中的行数 try
{
conn.Open();
if (sourceDt != null && sourceDt.Rows.Count != )
bulkCopy.WriteToServer(sourceDt); //将提供的数据源中的所有行复制到目标表中
}
catch (Exception ex)
{
throw ex;
}
finally
{
conn.Close();
if (bulkCopy != null)
bulkCopy.Close();
} } #endregion }
}