using system;
using system.collections.generic;
using system.text;
using system.configuration;
using system.data;
using system.data.sqlclient;
namespace dal
{
public class sqlhelper
{
//连接字符串
static string strconn = configurationmanager.connectionstrings["cnnhorechargeplatformconnectionstring"].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;
}
#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
}
}
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