//返回SQL影响的行数
public object ExecuteScalar(DbCommand cmd)
{
MyTransaction tran = MyTransaction.BeginTransaction(cmd);
object ret = null;
try
{
ret = cmd.ExecuteScalar();
tran.Commit();
}
catch (Exception e)
{
tran.Rollback();
return(e.ToString());
}
return(ret);
}
//返回DataTable对象
public DataTable ExecuteDataTable(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
DataTable dataTable = null;
MyTransaction _tran = MyTransaction.BeginTransaction(cmd);
dbDataAdapter.SelectCommand = cmd;
try
{
dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
_tran.Commit();
}
catch (Exception e)
{
_tran.Rollback();
dataTable = CreateErrorTable(e.ToString());
}
return(dataTable);
}
//返回DataSet对象
public DataSet ExecuteDataSet(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
DataSet ds = new DataSet();
MyTransaction tran = MyTransaction.BeginTransaction(cmd);
if (dbDataAdapter != null)
{
dbDataAdapter.SelectCommand = cmd;
try
{
dbDataAdapter.Fill(ds);
tran.Commit();
}
catch (Exception e)
{
tran.Rollback();
ds.Tables.Add(CreateErrorTable(e.ToString()));
}
}
return(ds);
}
