DbHelper数据库通用类使用方法

代码
   
     
// 执行SQL语句
public static void ExecSqlCommand()
{
DbHelper db
= new DbHelper();
DbCommand command
= db.GetSqlStringCommond( " select * from t1_insert " );
db.ExecuteNonQuery(command);
}

// 执行存储过程
public static void ExecStoredProcedure()
{
DbHelper db
= new DbHelper();
DbCommand command
= db.GetStoredProcCommond( " t1_insert " );
db.AddInParameter(command,
" @id " , DbType.String, " heihei " );
db.AddInParameter(command,
" @id " , DbType.String, " heihei " );
db.ExecuteNonQuery(command);
}

// 返回DataTable
public static void GetDataTable()
{
DbHelper db
= new DbHelper();
DbCommand command
= db.GetSqlStringCommond( " t1_findall " );
DataTable dt
= db.ExecuteDataTable(command);
}

// 获取各种返回值
public static void GetAllParameter()
{
DbHelper db
= new DbHelper();
DbCommand command
= db.GetStoredProcCommond( " t2_insert " );

db.AddInParameter(command,
" @timeticks " , DbType.Int64, DateTime.Now.Ticks);
db.AddOutParameter(command,
" @outString " , DbType.String, 20 );
db.AddReturnParameter(command,
" @returnValue " , DbType.Int32);
db.ExecuteNonQuery(command);

string s = db.GetParameter(command, " @outString " ).Value as string ; // out parameter
int r = Convert.ToInt32(db.GetParameter(command, " @returnValue " ).Value); // return value
}

// DateReader操作
public static void GetDataReader()
{
DbHelper db
= new DbHelper();
DbCommand command
= db.GetStoredProcCommond( " t2_insert " );

db.AddInParameter(command,
" @timeticks " , DbType.Int64, DateTime.Now.Ticks);
db.AddOutParameter(command,
" @outString " , DbType.String, 20 );
db.AddReturnParameter(command,
" @returnValue " , DbType.Int32);

using (DbDataReader reader = db.ExecuteReader(command))
{
// dt.Load(reader);
}
string s = db.GetParameter(command, " @outString " ).Value as string ; // out parameter
int r = Convert.ToInt32(db.GetParameter(command, " @returnValue " ).Value); // return value
}

// 获取DataSet
public static void GetDataSet()
{
DbHelper db
= new DbHelper();
DbCommand command
= db.GetSqlStringCommond( " select * from t1 " );
DataSet ds
= db.ExecuteDataSet(command);
}

// 事务的使用.(项目中需要将基本的数据库操作组合成一个完整的业务流时,代码级的事务是必不可少的哦)
public void DoBusiness()
{
using (Trans t = new Trans())
{
try
{
D1(t);
throw new Exception(); // 如果有异常,会回滚滴
D2(t);
t.Commit();
}
catch
{
t.RollBack();
}
}
}

public void D1(Trans t)
{
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);

if (t == null )
db.ExecuteNonQuery(cmd);
else db.ExecuteNonQuery(cmd,t);

string s = db.GetParameter(cmd, " @outString " ).Value as string ; // out parameter
int r = Convert.ToInt32(db.GetParameter(cmd, " @returnValue " ).Value); // return value
}

public void D2(Trans t)
{
DbHelper db
= new DbHelper();
DbCommand cmd
= db.GetSqlStringCommond( " insert t1 (id)values(‘..‘) " );
if (t == null )
db.ExecuteNonQuery(cmd);
else db.ExecuteNonQuery(cmd, t);
}

 

其中 DbCommand 位于 using System.Data.Common 命名空间

 

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