DbHelper資料操作類

using system;

using system.data;
using system.data.common;
using system.configuration;
public class dbhelper
public dbhelper(string connectionstring)
public static dbconnection createconnection()
public static dbconnection createconnection(string connectionstring)
public dbcommand getstoredproccommond(string storedprocedure)
public dbcommand getsqlstringcommond(string sqlquery)
#region 增加引數
public void addparametercollection(dbcommand cmd, dbparametercollection dbparametercollection)
}public void addoutparameter(dbcommand cmd, string parametername, dbtype dbtype, int size)
public void addinparameter(dbcommand cmd, string parametername, dbtype dbtype, object value)
public void addreturnparameter(dbcommand cmd, string parametername, dbtype dbtype)
public dbparameter getparameter(dbcommand cmd, string parametername)
#endregion
#region 執行
public dataset executedataset(dbcommand cmd)
public datatable executedatatable(dbcommand cmd)
public dbdatareader executereader(dbcommand cmd)
public int executenonquery(dbcommand cmd)
public object executescalar(dbcommand cmd)
#endregion        
#region 執行事務
public dataset executedataset(dbcommand cmd,trans t)
public datatable executedatatable(dbcommand cmd, trans t)
public dbdatareader executereader(dbcommand cmd, trans t)
public int executenonquery(dbcommand cmd, trans t)
public object executescalar(dbcommand cmd, trans t)
#endregion
}public class trans : idisposable
}public dbtransaction dbtrans
}public trans()
public trans(string connectionstring)
public void commit()
public void rollback()
public void dispose()
public void colse()
}}

1)直接執行sql語句

dbhelper db = new dbhelper();

dbcommand cmd = db.getsqlstringcommond("insert t1 (id)values('haha')");
db.executenonquery(cmd);

2)執行儲存過程

dbhelper db = new dbhelper();

dbcommand cmd = db.getstoredproccommond("t1_insert");
db.addinparameter(cmd, "@id", dbtype.string, "heihei");
db.executenonquery(cmd);

dbhelper db = new dbhelper();

dbcommand cmd = db.getsqlstringcommond("select * from t1");
dataset ds = db.executedataset(cmd);

dbhelper db = new dbhelper();

dbcommand cmd = db.getsqlstringcommond("t1_findall");
datatable dt = db.executedatatable(cmd);

5)輸入引數/輸出引數/返回值的使用

dbhelper db = new dbhelper();

dbcommand cmd = db.getstoredproccommond("t2_insert");
db.addinparameter(cmd, "@timeticks", dbtype.int64, datetime.now.ticks);
db.addoutparameter(cmd, "@outstring", dbtype.string, 20);
db.addreturnparameter(cmd, "@returnvalue", dbtype.int32);
db.executenonquery(cmd);
string s = db.getparameter(cmd, "@outstring").value as string;//out parameter
int r = convert.toint32(db.getparameter(cmd, "@returnvalue").value);//return value

dbhelper db = new dbhelper();

dbcommand cmd = db.getstoredproccommond("t2_insert");
db.addinparameter(cmd, "@timeticks", dbtype.int64, datetime.now.ticks);
db.addoutparameter(cmd, "@outstring", dbtype.string, 20);
db.addreturnparameter(cmd, "@returnvalue", dbtype.int32);
using (dbdatareader reader = db.executereader(cmd))
string s = db.getparameter(cmd, "@outstring").value as string;//out parameter
int r = convert.toint32(db.getparameter(cmd, "@returnvalue").value);//return value

7)事務的使用.(專案中需要將基本的資料庫操作組合成乙個完整的業務流時,**級的事務是必不可少的哦)

pubic void dobusiness()

catch}}
public void d1(trans t)
public void d2(trans t)

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