化工人才网hgrencai,壹周立波秀最新一期,合川奇趣庄园
我要评论 public enum effentnexttype
{
/// <summary>
/// 对其他语句无任何影响
/// </summary>
none,
/// <summary>
/// 当前语句必须为"select count(1) from .."格式，如果存在则继续执行，不存在回滚事务
/// </summary>
whenhavecontine,
/// <summary>
/// 当前语句必须为"select count(1) from .."格式，如果不存在则继续执行，存在回滚事务
/// </summary>
whennohavecontine,
/// <summary>
/// 当前语句影响到的行数必须大于0，否则回滚事务
/// </summary>
excuteeffectrows,
/// <summary>
/// 引发事件-当前语句必须为"select count(1) from .."格式，如果不存在则继续执行，存在回滚事务
/// </summary>
solicitationevent
}
public class commandinfo
{
public object shareobject = null;
public object originaldata = null;
event eventhandler _solicitationevent;
public event eventhandler solicitationevent
{
add
{
_solicitationevent += value;
}
remove
{
_solicitationevent -= value;
}
}
public void onsolicitationevent()
{
if (_solicitationevent != null)
{
_solicitationevent(this, new eventargs());
}
}
public string commandtext;
public system.data.common.dbparameter[] parameters;
public effentnexttype effentnexttype = effentnexttype.none;
public commandinfo()
{
}
public commandinfo(string sqltext, sqlparameter[] para)
{
this.commandtext = sqltext;
this.parameters = para;
}
public commandinfo(string sqltext, sqlparameter[] para, effentnexttype type)
{
this.commandtext = sqltext;
this.parameters = para;
this.effentnexttype = type;
}
}
public abstract class dbhelper
{
public static string connectionstring =configurationmanager.connectionstrings["entity"].connectionstring;
#region 公用方法
/// <summary>
/// 判断是否存在某表的某个字段
/// </summary>
/// <param name="tablename">表名称</param>
/// <param name="columnname">列名称</param>
/// <returns>是否存在</returns>
public static bool columnexists(string tablename, string columnname)
{
string sql = "select count(1) from syscolumns where [id]=object_id('" + tablename + "') and [name]='" + columnname + "'";
object res = getsingle(sql);
if (res == null)
{
return false;
}
return convert.toint32(res) > 0;
}
public static int getminid(string fieldname, string tablename)
{
string strsql = "select min(" + fieldname + ") from " + tablename;
object obj = dbhelper.getsingle(strsql);
if (obj == null)
{
return 0;
}
else
{
return int.parse(obj.tostring());
}
}
public static int getmaxid(string fieldname, string tablename)
{
string strsql = "select max(" + fieldname + ")+1 from " + tablename;
object obj = dbhelper.getsingle(strsql);
if (obj == null)
{
return 1;
}
else
{
return int.parse(obj.tostring());
}
}
public static bool exists(string strsql)
{
object obj = dbhelper.getsingle(strsql);
int cmdresult;
if ((object.equals(obj, null)) || (object.equals(obj, system.dbnull.value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.parse(obj.tostring());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
/// <summary>
/// 表是否存在
/// </summary>
/// <param name="tablename"></param>
/// <returns></returns>
public static bool tabexists(string tablename)
{
string strsql = "select count(*) from sysobjects where id = object_id(n'[" + tablename + "]') and objectproperty(id, n'isusertable') = 1";
//string strsql = "select count(*) from sys.objects where object_id = object_id(n'[dbo].[" + tablename + "]') and type in (n'u')";
object obj = dbhelper.getsingle(strsql);
int cmdresult;
if ((object.equals(obj, null)) || (object.equals(obj, system.dbnull.value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.parse(obj.tostring());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
public static bool exists(string strsql, params sqlparameter[] cmdparms)
{
object obj = dbhelper.getsingle(strsql, cmdparms);
int cmdresult;
if ((object.equals(obj, null)) || (object.equals(obj, system.dbnull.value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.parse(obj.tostring());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
#endregion
#region 执行简单sql语句
/// <summary>
/// 执行sql语句，返回影响的记录数
/// </summary>
/// <param name="sqlstring">sql语句</param>
/// <returns>影响的记录数</returns>
public static int executesql(string sqlstring)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
using (sqlcommand cmd = new sqlcommand(sqlstring, connection))
{
try
{
connection.open();
int rows = cmd.executenonquery();
return rows;
}
catch (system.data.sqlclient.sqlexception e)
{
connection.close();
throw e;
}
}
}
}
/// <summary>
/// 2012-2-21新增重载，执行sql语句，返回影响的记录数
/// </summary>
/// <param name="connection">sqlconnection对象</param>
/// <param name="trans">sqltransaction事件</param>
/// <param name="sqlstring">sql语句</param>
/// <returns>影响的记录数</returns>
public static int executesql(sqlconnection connection, sqltransaction trans, string sqlstring)
{
using (sqlcommand cmd = new sqlcommand(sqlstring, connection))
{
try
{
cmd.connection = connection;
cmd.transaction = trans;
int rows = cmd.executenonquery();
return rows;
}
catch (system.data.sqlclient.sqlexception e)
{
//trans.rollback();
throw e;
}
}
}
public static int executesqlbytime(string sqlstring, int times)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
using (sqlcommand cmd = new sqlcommand(sqlstring, connection))
{
try
{
connection.open();
cmd.commandtimeout = times;
int rows = cmd.executenonquery();
return rows;
}
catch (system.data.sqlclient.sqlexception e)
{
connection.close();
throw e;
}
}
}
}
/// <summary>
/// 执行sql和oracle滴混合事务
/// </summary>
/// <param name="list">sql命令行列表</param>
/// <param name="oraclecmdsqllist">oracle命令行列表</param>
/// <returns>执行结果 0-由于sql造成事务失败 -1 由于oracle造成事务失败 1-整体事务执行成功</returns>
public static int executesqltran(list<commandinfo> list, list<commandinfo> oraclecmdsqllist)
{
using (sqlconnection conn = new sqlconnection(connectionstring))
{
conn.open();
sqlcommand cmd = new sqlcommand();
cmd.connection = conn;
sqltransaction tx = conn.begintransaction();
cmd.transaction = tx;
try
{
foreach (commandinfo myde in list)
{
string cmdtext = myde.commandtext;
sqlparameter[] cmdparms = (sqlparameter[])myde.parameters;
preparecommand(cmd, conn, tx, cmdtext, cmdparms);
if (myde.effentnexttype == effentnexttype.solicitationevent)
{
if (myde.commandtext.tolower().indexof("count(") == -1)
{
tx.rollback();
throw new exception("违背要求" + myde.commandtext + "必须符合select count(..的格式");
//return 0;
}
object obj = cmd.executescalar();
bool ishave = false;
if (obj == null && obj == dbnull.value)
{
ishave = false;
}
ishave = convert.toint32(obj) > 0;
if (ishave)
{
//引发事件
myde.onsolicitationevent();
}
}
if (myde.effentnexttype == effentnexttype.whenhavecontine || myde.effentnexttype == effentnexttype.whennohavecontine)
{
if (myde.commandtext.tolower().indexof("count(") == -1)
{
tx.rollback();
throw new exception("sql:违背要求" + myde.commandtext + "必须符合select count(..的格式");
//return 0;
}
object obj = cmd.executescalar();
bool ishave = false;
if (obj == null && obj == dbnull.value)
{
ishave = false;
}
ishave = convert.toint32(obj) > 0;
if (myde.effentnexttype == effentnexttype.whenhavecontine && !ishave)
{
tx.rollback();
throw new exception("sql:违背要求" + myde.commandtext + "返回值必须大于0");
//return 0;
}
if (myde.effentnexttype == effentnexttype.whennohavecontine && ishave)
{
tx.rollback();
throw new exception("sql:违背要求" + myde.commandtext + "返回值必须等于0");
//return 0;
}
continue;
}
int val = cmd.executenonquery();
if (myde.effentnexttype == effentnexttype.excuteeffectrows && val == 0)
{
tx.rollback();
throw new exception("sql:违背要求" + myde.commandtext + "必须有影响行");
//return 0;
}
cmd.parameters.clear();
}
tx.commit();
return 1;
}
catch (sqlexception e)
{
tx.rollback();
throw e;
}
catch (exception e)
{
tx.rollback();
throw e;
}
}
}
/// <summary>
/// 执行多条sql语句，实现数据库事务。
/// </summary>
/// <param name="sqlstringlist">多条sql语句</param>
public static int executesqltran(list<string> sqlstringlist)
{
using (sqlconnection conn = new sqlconnection(connectionstring))
{
conn.open();
sqlcommand cmd = new sqlcommand();
cmd.connection = conn;
sqltransaction tx = conn.begintransaction();
cmd.transaction = tx;
try
{
int count = 0;
for (int n = 0; n < sqlstringlist.count; n++)
{
string strsql = sqlstringlist[n];
if (strsql.trim().length > 1)
{
cmd.commandtext = strsql;
count += cmd.executenonquery();
}
}
tx.commit();
return count;
}
catch
{
tx.rollback();
return 0;
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的sql语句。
/// </summary>
/// <param name="sqlstring">sql语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
public static int executesql(string sqlstring, string content)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
sqlcommand cmd = new sqlcommand(sqlstring, connection);
system.data.sqlclient.sqlparameter myparameter = new system.data.sqlclient.sqlparameter("@content", sqldbtype.ntext);
myparameter.value = content;
cmd.parameters.add(myparameter);
try
{
connection.open();
int rows = cmd.executenonquery();
return rows;
}
catch (sqlexception e)
{
throw e;
}
finally
{
cmd.dispose();
connection.close();
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的sql语句。
/// </summary>
/// <param name="sqlstring">sql语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
public static object executesqlget(string sqlstring, string content)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
sqlcommand cmd = new sqlcommand(sqlstring, connection);
system.data.sqlclient.sqlparameter myparameter = new system.data.sqlclient.sqlparameter("@content", sqldbtype.ntext);
myparameter.value = content;
cmd.parameters.add(myparameter);
try
{
connection.open();
object obj = cmd.executescalar();
if ((object.equals(obj, null)) || (object.equals(obj, system.dbnull.value)))
{
return null;
}
else
{
return obj;
}
}
catch (system.data.sqlclient.sqlexception e)
{
throw e;
}
finally
{
cmd.dispose();
connection.close();
}
}
}
/// <summary>
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
/// </summary>
/// <param name="strsql">sql语句</param>
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
/// <returns>影响的记录数</returns>
public static int executesqlinsertimg(string strsql, byte[] fs)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
sqlcommand cmd = new sqlcommand(strsql, connection);
system.data.sqlclient.sqlparameter myparameter = new system.data.sqlclient.sqlparameter("@fs", sqldbtype.image);
myparameter.value = fs;
cmd.parameters.add(myparameter);
try
{
connection.open();
int rows = cmd.executenonquery();
return rows;
}
catch (sqlexception e)
{
throw e;
}
finally
{
cmd.dispose();
connection.close();
}
}
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="sqlstring">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object getsingle(string sqlstring)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
using (sqlcommand cmd = new sqlcommand(sqlstring, connection))
{
try
{
connection.open();
object obj = cmd.executescalar();
if ((object.equals(obj, null)) || (object.equals(obj, system.dbnull.value)))
{
return null;
}
else
{
return obj;
}
}
catch (system.data.sqlclient.sqlexception e)
{
connection.close();
throw e;
}
}
}
}
public static object getsingle(string sqlstring, int times)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
using (sqlcommand cmd = new sqlcommand(sqlstring, connection))
{
try
{
connection.open();
cmd.commandtimeout = times;
object obj = cmd.executescalar();
if ((object.equals(obj, null)) || (object.equals(obj, system.dbnull.value)))
{
return null;
}
else
{
return obj;
}
}
catch (system.data.sqlclient.sqlexception e)
{
connection.close();
throw e;
}
}
}
}
/// <summary>
/// 执行查询语句，返回sqldatareader ( 注意：调用该方法后，一定要对sqldatareader进行close )
/// </summary>
/// <param name="strsql">查询语句</param>
/// <returns>sqldatareader</returns>
public static sqldatareader executereader(string strsql)
{
sqlconnection connection = new sqlconnection(connectionstring);
sqlcommand cmd = new sqlcommand(strsql, connection);
try
{
connection.open();
sqldatareader myreader = cmd.executereader(commandbehavior.closeconnection);
return myreader;
}
catch (system.data.sqlclient.sqlexception e)
{
throw e;
}
}
/// <summary>
/// 执行查询语句，返回dataset
/// </summary>
/// <param name="sqlstring">查询语句</param>
/// <returns>dataset</returns>
public static dataset query(string sqlstring)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
dataset ds = new dataset();
try
{
connection.open();
sqldataadapter command = new sqldataadapter(sqlstring, connection);
command.fill(ds, "ds");
}
catch (system.data.sqlclient.sqlexception ex)
{
throw new exception(ex.message);
}
return ds;
}
}
public static dataset query(string sqlstring, int times)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
dataset ds = new dataset();
try
{
connection.open();
sqldataadapter command = new sqldataadapter(sqlstring, connection);
command.selectcommand.commandtimeout = times;
command.fill(ds, "ds");
}
catch (system.data.sqlclient.sqlexception ex)
{
throw new exception(ex.message);
}
return ds;
}
}
/// <summary>
///新增重载，执行查询语句，返回dataset
/// </summary>
/// <param name="connection">sqlconnection对象</param>
/// <param name="trans">sqltransaction事务</param>
/// <param name="sqlstring">sql语句</param>
/// <returns>dataset</returns>
public static dataset query(sqlconnection connection, sqltransaction trans, string sqlstring)
{
dataset ds = new dataset();
try
{
sqldataadapter command = new sqldataadapter(sqlstring, connection);
command.selectcommand.transaction = trans;
command.fill(ds, "ds");
}
catch (sqlexception ex)
{
throw new exception(ex.message);
}
return ds;
}
#endregion
#region 执行带参数的sql语句
/// <summary>
/// 执行sql语句，返回影响的记录数
/// </summary>
/// <param name="sqlstring">sql语句</param>
/// <returns>影响的记录数</returns>
public static int executesql(string sqlstring, params sqlparameter[] cmdparms)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
using (sqlcommand cmd = new sqlcommand())
{
try
{
preparecommand(cmd, connection, null, sqlstring, cmdparms);
int rows = cmd.executenonquery();
cmd.parameters.clear();
return rows;
}
catch (sqlexception e)
{
throw e;
}
}
}
}
/// <summary>
/// 新增重载，执行sql语句，返回影响的记录数
/// </summary>
/// <param name="connection">sqlconnection对象</param>
/// <param name="trans">sqltransaction对象</param>
/// <param name="sqlstring">sql语句</param>
/// <returns>影响的记录数</returns>
public static int executesql(sqlconnection connection, sqltransaction trans, string sqlstring, params sqlparameter[] cmdparms)
{
using (sqlcommand cmd = new sqlcommand())
{
try
{
preparecommand(cmd, connection, trans, sqlstring, cmdparms);
int rows = cmd.executenonquery();
cmd.parameters.clear();
return rows;
}
catch (system.data.sqlclient.sqlexception e)
{
//trans.rollback();
throw e;
}
}
}
/// <summary>
/// 执行多条sql语句，实现数据库事务。
/// </summary>
/// <param name="sqlstringlist">sql语句的哈希表（key为sql语句，value是该语句的sqlparameter[]）</param>
public static void executesqltran(hashtable sqlstringlist)
{
using (sqlconnection conn = new sqlconnection(connectionstring))
{
conn.open();
using (sqltransaction trans = conn.begintransaction())
{
sqlcommand cmd = new sqlcommand();
try
{
//循环
foreach (dictionaryentry myde in sqlstringlist)
{
string cmdtext = myde.key.tostring();
sqlparameter[] cmdparms = (sqlparameter[])myde.value;
preparecommand(cmd, conn, trans, cmdtext, cmdparms);
int val = cmd.executenonquery();
cmd.parameters.clear();
}
trans.commit();
}
catch
{
trans.rollback();
throw;
}
}
}
}
/// <summary>
/// 执行多条sql语句，实现数据库事务。
/// </summary>
/// <param name="sqlstringlist">sql语句的哈希表（key为sql语句，value是该语句的sqlparameter[]）</param>
public static int executesqltran(system.collections.generic.list<commandinfo> cmdlist)
{
using (sqlconnection conn = new sqlconnection(connectionstring))
{
conn.open();
using (sqltransaction trans = conn.begintransaction())
{
sqlcommand cmd = new sqlcommand();
try
{
int count = 0;
//循环
foreach (commandinfo myde in cmdlist)
{
string cmdtext = myde.commandtext;
sqlparameter[] cmdparms = (sqlparameter[])myde.parameters;
preparecommand(cmd, conn, trans, cmdtext, cmdparms);
if (myde.effentnexttype == effentnexttype.whenhavecontine || myde.effentnexttype == effentnexttype.whennohavecontine)
{
if (myde.commandtext.tolower().indexof("count(") == -1)
{
trans.rollback();
return 0;
}
object obj = cmd.executescalar();
bool ishave = false;
if (obj == null && obj == dbnull.value)
{
ishave = false;
}
ishave = convert.toint32(obj) > 0;
if (myde.effentnexttype == effentnexttype.whenhavecontine && !ishave)
{
trans.rollback();
return 0;
}
if (myde.effentnexttype == effentnexttype.whennohavecontine && ishave)
{
trans.rollback();
return 0;
}
continue;
}
int val = cmd.executenonquery();
count += val;
if (myde.effentnexttype == effentnexttype.excuteeffectrows && val == 0)
{
trans.rollback();
return 0;
}
cmd.parameters.clear();
}
trans.commit();
return count;
}
catch
{
trans.rollback();
throw;
}
}
}
}
/// <summary>
/// 执行多条sql语句，实现数据库事务。
/// </summary>
/// <param name="sqlstringlist">sql语句的哈希表（key为sql语句，value是该语句的sqlparameter[]）</param>
public static void executesqltranwithindentity(system.collections.generic.list<commandinfo> sqlstringlist)
{
using (sqlconnection conn = new sqlconnection(connectionstring))
{
conn.open();
using (sqltransaction trans = conn.begintransaction())
{
sqlcommand cmd = new sqlcommand();
try
{
int indentity = 0;
//循环
foreach (commandinfo myde in sqlstringlist)
{
string cmdtext = myde.commandtext;
sqlparameter[] cmdparms = (sqlparameter[])myde.parameters;
foreach (sqlparameter q in cmdparms)
{
if (q.direction == parameterdirection.inputoutput)
{
q.value = indentity;
}
}
preparecommand(cmd, conn, trans, cmdtext, cmdparms);
int val = cmd.executenonquery();
foreach (sqlparameter q in cmdparms)
{
if (q.direction == parameterdirection.output)
{
indentity = convert.toint32(q.value);
}
}
cmd.parameters.clear();
}
trans.commit();
}
catch
{
trans.rollback();
throw;
}
}
}
}
/// <summary>
/// 执行多条sql语句，实现数据库事务。
/// </summary>
/// <param name="sqlstringlist">sql语句的哈希表（key为sql语句，value是该语句的sqlparameter[]）</param>
public static void executesqltranwithindentity(hashtable sqlstringlist)
{
using (sqlconnection conn = new sqlconnection(connectionstring))
{
conn.open();
using (sqltransaction trans = conn.begintransaction())
{
sqlcommand cmd = new sqlcommand();
try
{
int indentity = 0;
//循环
foreach (dictionaryentry myde in sqlstringlist)
{
string cmdtext = myde.key.tostring();
sqlparameter[] cmdparms = (sqlparameter[])myde.value;
foreach (sqlparameter q in cmdparms)
{
if (q.direction == parameterdirection.inputoutput)
{
q.value = indentity;
}
}
preparecommand(cmd, conn, trans, cmdtext, cmdparms);
int val = cmd.executenonquery();
foreach (sqlparameter q in cmdparms)
{
if (q.direction == parameterdirection.output)
{
indentity = convert.toint32(q.value);
}
}
cmd.parameters.clear();
}
trans.commit();
}
catch
{
trans.rollback();
throw;
}
}
}
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="sqlstring">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object getsingle(string sqlstring, params sqlparameter[] cmdparms)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
using (sqlcommand cmd = new sqlcommand())
{
try
{
preparecommand(cmd, connection, null, sqlstring, cmdparms);
object obj = cmd.executescalar();
cmd.parameters.clear();
if ((object.equals(obj, null)) || (object.equals(obj, system.dbnull.value)))
{
return null;
}
else
{
return obj;
}
}
catch (system.data.sqlclient.sqlexception e)
{
throw e;
}
}
}
}
/// <summary>
/// 新增重载，执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="connection">sqlconnection对象</param>
/// <param name="trans">sqltransaction事务</param>
/// <param name="sqlstring">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object getsingle(sqlconnection connection, sqltransaction trans, string sqlstring, params sqlparameter[] cmdparms)
{
using (sqlcommand cmd = new sqlcommand())
{
try
{
preparecommand(cmd, connection, trans, sqlstring, cmdparms);
object obj = cmd.executescalar();
cmd.parameters.clear();
if ((object.equals(obj, null)) || (object.equals(obj, system.dbnull.value)))
{
return null;
}
else
{
return obj;
}
}
catch (system.data.sqlclient.sqlexception e)
{
trans.rollback();
throw e;
}
}
}
/// <summary>
/// 执行查询语句，返回sqldatareader ( 注意：调用该方法后，一定要对sqldatareader进行close )
/// </summary>
/// <param name="strsql">查询语句</param>
/// <returns>sqldatareader</returns>
public static sqldatareader executereader(string sqlstring, params sqlparameter[] cmdparms)
{
sqlconnection connection = new sqlconnection(connectionstring);
sqlcommand cmd = new sqlcommand();
try
{
preparecommand(cmd, connection, null, sqlstring, cmdparms);
sqldatareader myreader = cmd.executereader(commandbehavior.closeconnection);
cmd.parameters.clear();
return myreader;
}
catch (system.data.sqlclient.sqlexception e)
{
throw e;
}
// finally
// {
// cmd.dispose();
// connection.close();
// }
}
/// <summary>
/// 执行查询语句，返回dataset
/// </summary>
/// <param name="sqlstring">查询语句</param>
/// <returns>dataset</returns>
public static dataset query(string sqlstring, params sqlparameter[] cmdparms)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
sqlcommand cmd = new sqlcommand();
preparecommand(cmd, connection, null, sqlstring, cmdparms);
using (sqldataadapter da = new sqldataadapter(cmd))
{
dataset ds = new dataset();
try
{
da.fill(ds, "ds");
cmd.parameters.clear();
}
catch (system.data.sqlclient.sqlexception ex)
{
throw new exception(ex.message);
}
return ds;
}
}
}
/// <summary>
/// 新增重载，执行查询语句，返回dataset
/// </summary>
/// <param name="connection">sqlconnection对象</param>
/// <param name="trans">sqltransaction事务</param>
/// <param name="sqlstring">查询语句</param>
/// <returns>dataset</returns>
public static dataset query(sqlconnection connection, sqltransaction trans, string sqlstring, params sqlparameter[] cmdparms)
{
sqlcommand cmd = new sqlcommand();
preparecommand(cmd, connection, trans, sqlstring, cmdparms);
using (sqldataadapter da = new sqldataadapter(cmd))
{
dataset ds = new dataset();
try
{
da.fill(ds, "ds");
cmd.parameters.clear();
}
catch (system.data.sqlclient.sqlexception ex)
{
trans.rollback();
throw new exception(ex.message);
}
return ds;
}
}
private static void preparecommand(sqlcommand cmd, sqlconnection conn, sqltransaction trans, 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 = commandtype.text;//cmdtype;
if (cmdparms != null)
{
foreach (sqlparameter parameter in cmdparms)
{
if ((parameter.direction == parameterdirection.inputoutput || parameter.direction == parameterdirection.input) &&
(parameter.value == null))
{
parameter.value = dbnull.value;
}
cmd.parameters.add(parameter);
}
}
}
#endregion
#region 存储过程操作
/// <summary>
/// 执行存储过程，返回sqldatareader ( 注意：调用该方法后，一定要对sqldatareader进行close )
/// </summary>
/// <param name="storedprocname">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>sqldatareader</returns>
public static sqldatareader runprocedure(string storedprocname, idataparameter[] parameters)
{
sqlconnection connection = new sqlconnection(connectionstring);
sqldatareader returnreader;
connection.open();
sqlcommand command = buildquerycommand(connection, storedprocname, parameters);
command.commandtype = commandtype.storedprocedure;
returnreader = command.executereader(commandbehavior.closeconnection);
return returnreader;
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedprocname">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tablename">dataset结果中的表名</param>
/// <returns>dataset</returns>
public static dataset runprocedure(string storedprocname, idataparameter[] parameters, string tablename)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
dataset dataset = new dataset();
connection.open();
sqldataadapter sqlda = new sqldataadapter();
sqlda.selectcommand = buildquerycommand(connection, storedprocname, parameters);
sqlda.fill(dataset, tablename);
connection.close();
return dataset;
}
}
public static dataset runprocedure(string storedprocname, idataparameter[] parameters, string tablename, int times)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
dataset dataset = new dataset();
connection.open();
sqldataadapter sqlda = new sqldataadapter();
sqlda.selectcommand = buildquerycommand(connection, storedprocname, parameters);
sqlda.selectcommand.commandtimeout = times;
sqlda.fill(dataset, tablename);
connection.close();
return dataset;
}
}
/// <summary>
/// 构建 sqlcommand 对象(用来返回一个结果集，而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedprocname">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>sqlcommand</returns>
private static sqlcommand buildquerycommand(sqlconnection connection, string storedprocname, idataparameter[] parameters)
{
sqlcommand command = new sqlcommand(storedprocname, connection);
command.commandtype = commandtype.storedprocedure;
foreach (sqlparameter parameter in parameters)
{
if (parameter != null)
{
// 检查未分配值的输出参数,将其分配以dbnull.value.
if ((parameter.direction == parameterdirection.inputoutput || parameter.direction == parameterdirection.input) &&
(parameter.value == null))
{
parameter.value = dbnull.value;
}
command.parameters.add(parameter);
}
}
return command;
}
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedprocname">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsaffected">影响的行数</param>
/// <returns></returns>
public static int runprocedure(string storedprocname, idataparameter[] parameters, out int rowsaffected)
{
using (sqlconnection connection = new sqlconnection(connectionstring))
{
int result;
connection.open();
sqlcommand command = buildintcommand(connection, storedprocname, parameters);
rowsaffected = command.executenonquery();
result = (int)command.parameters["returnvalue"].value;
//connection.close();
return result;
}
}
/// <summary>
/// 创建 sqlcommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedprocname">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>sqlcommand 对象实例</returns>
private static sqlcommand buildintcommand(sqlconnection connection, string storedprocname, idataparameter[] parameters)
{
sqlcommand command = buildquerycommand(connection, storedprocname, parameters);
command.parameters.add(new sqlparameter("returnvalue",
sqldbtype.int, 4, parameterdirection.returnvalue,
false, 0, 0, string.empty, datarowversion.default, null));
return command;
}
#endregion
}
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