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
/// #zuxuguang@163.com
/// </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 =
0; 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 <=
0 || tableIndex <
0)
return null;
DataTable dt =
dataSet.Tables[tableIndex];
IList<T> list =
new List<T>
();
for (
int i =
0; 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 =
0; 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 =
0;
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 =
0;
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",
3);
//给输入参数赋值
MyCommand.Parameters.AddWithValue(
"@inpass",
"3");
//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 =
0; 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 !=
0)
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
}
}
数据库助手类 DBHelper
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