public static bool existObj(object obj)
{
List <string> prikey = new List <string>(), prival = new List <string>();
DBAttribute.GetDBPrimaryElement(obj.GetType(), obj, prikey, prival);
return(exist(obj.GetType(), prikey, prival));
}
public static bool Delete(OracleConnection connection, object obj)
{
Type type = obj.GetType();
StringBuilder strSql = new StringBuilder();
try
{
strSql.Append(string.Format("delete from {0}", DBAttribute.GetDBTable(type)));
}
catch (ArgumentException e)
{
throw new ArgumentException(e.Message);
// throw new ArgumentException("Invaild Argument!\n\n from Delete(OracleConnection connection, object obj) \n");
}
List <string> propertyPrimaryKeyList = new List <string>();
List <string> propertyPrimaryValueList = new List <string>();
DBAttribute.GetDBPrimaryElement(type, obj, propertyPrimaryKeyList, propertyPrimaryValueList);
if (!(propertyPrimaryKeyList.Any() && propertyPrimaryValueList.Any()))
{
throw new ArgumentException("Invaild Argument!\n\n from Delete(OracleConnection connection, object obj) \n");
}
strSql.Append(string.Format(" where "));
for (int i = 0; i < propertyPrimaryKeyList.Count; ++i)
{
strSql.Append(string.Format(" {0}={1} AND", propertyPrimaryKeyList[i], propertyPrimaryValueList[i]));
}
strSql.Length -= 3;
return(ExecuteSql(connection, strSql.ToString()) > 0);
}
public static bool Update(OracleConnection connection, object obj)
{
//不允许更改主码
StringBuilder strSql = new StringBuilder();
List <string> key = new List <string>(), pri = new List <string>();
Dictionary <string, OracleParameter> opd = GetDBMember(obj, key, pri);
List <OracleParameter> op = new List <OracleParameter>();
strSql.Append(string.Format("update {0} set ", DBAttribute.GetDBTable(obj.GetType())));
for (int i = 0; i < key.Count(); ++i)
{
strSql.Append(string.Format(" {0} = :{0} ,", key[i]));
op.Add(opd[key[i]]);
}
--strSql.Length;
strSql.Append(" where ");
for (int i = 0; i < pri.Count(); ++i)
{
strSql.Append(string.Format(" {0} = :{0} AND", pri[i]));
op.Add(opd[pri[i]]);
}
strSql.Length -= 3;
return(ExecuteSql(connection, strSql.ToString(), op.ToArray()) > 0);
}
public static void Query(OracleConnection connection, object obj, List <string> needs, List <string> res)
{
StringBuilder StrSql = new StringBuilder(); //字符串拼接器
try
{
StrSql.Append(string.Format("select"));//DBAttribute.GetDBTable(obj.GetType()))
for (int i = 0; i < needs.Count; i++)
{
if (i == 0)
{
StrSql.Append(string.Format(" {0}", needs[i]));
}
else
{
StrSql.Append(string.Format(",{0}", needs[i]));
}
}
StrSql.Append(string.Format(" from {0}", GetDBTable(obj.GetType())));//DBAttribute.GetDBTable(obj.GetType()))
List <string> propertyPrimaryKeyList = new List <string>();
List <string> propertyPrimaryValueList = new List <string>();
//DBAttribute.GetDBElement(obj.GetType(), obj, propertyPrimaryKeyList, propertyPrimaryValueList);
DBAttribute.GetDBPrimaryElement(obj.GetType(), obj, propertyPrimaryKeyList, propertyPrimaryValueList);
if (!(propertyPrimaryKeyList.Any() && propertyPrimaryValueList.Any()))
{
throw new ArgumentException("Invaild Argument!\n\n from Delete(OracleConnection connection, object obj) \n");
}
StrSql.Append(string.Format(" where "));
for (int i = 0; i < propertyPrimaryKeyList.Count; ++i)
{
if (propertyPrimaryValueList[i] != null)
{
StrSql.Append(string.Format(" {0}={1} AND", propertyPrimaryKeyList[i], propertyPrimaryValueList[i]));
}
}
StrSql.Length -= 3; //减去AND
}
catch (ArgumentException e)
{
throw new ArgumentException(e.Message);
}
OracleCommand cmd = new OracleCommand();
PrepareCommand(cmd, connection, null, StrSql.ToString(), null);
OracleDataReader odr = null;
odr = cmd.ExecuteReader();
//odr读取数据并存入res
while (odr.Read())
{
for (int i = 0; i < needs.Count; i++)
{
res.Add(odr[i].ToString());
}
}
}
public static bool exist(Type type, List <string> key, List <string> val)
{
OracleConnection conn = pool.fetchConnection();
StringBuilder sb = new StringBuilder();
sb.Append(string.Format("select * from {0} where ", DBAttribute.GetDBTable(type)));
int len = key.Count();
for (int i = 0; i < len; ++i)
{
if (i != 0)
{
sb.Append(" AND ");
}
sb.Append($"{key[i]}='{val[i]}'");
}
bool res = OracleHelper.Exists(conn, sb.ToString());
pool.releaseConnection(conn);
return(res);
}
