public static bool DropTable(Type type)
{
IDataAccess dataAccess = CreateConn();
string sql = "drop table " + SimpleOrmCache.GetTableName(type);
return(dataAccess.ExecuteSql(sql));
}
public static bool CreateTable(Type type)
{
IDataAccess dataAccess = CreateConn();
string sql = SimpleOrmCache.GetTableDDL(type);
return(dataAccess.ExecuteSql(sql));
}
/// <summary>
/// 查询一个对象列表出来出来
/// </summary>
/// <typeparam name="T">泛型</typeparam>
/// <param name="sql">完整的sql语句</param>
/// <returns>一个对象</returns>
public static ArrayList QueryList(Type type, string sql)
{
IDataAccess dataAccess = CreateConn();
ArrayList list = new ArrayList();
if (sql == null && sql.Length == 0)
{
throw new ArgumentException("查询的语句不得为空！");
//return null;
}
// string sql = SimpleOrmCache.GetSelectSql(typeof(T)) + " where " + SimpleOrmCache.GetPK(typeof(T)) + "=" + pk.ToString();
string tablename = SimpleOrmCache.GetTableName(type);
DataTable dt = dataAccess.SelectDataTable(sql, tablename);
if (dt != null && dt.Rows.Count > 0)
{
DataRow dr = null;
for (int i = 0; i < dt.Rows.Count; i++)
{
dr = dt.Rows[i];
list.Add(CreateFromDataRow(type, dr));
}
}
return(list);
}
/// <summary>
/// 查询一个对象出来
/// </summary>
/// <typeparam name="T">泛型</typeparam>
/// <param name="pk">主键值</param>
/// <returns>一个对象</returns>
public static T Query <T>(object pk)
{
IDataAccess dataAccess = CreateConn();
if (pk == null || pk.ToString().Length == 0)
{
throw new ArgumentException("查询的PK主键不得为空！");
//return null;
}
string sql = SimpleOrmCache.GetSelectSql(typeof(T)) + " where " + SimpleOrmCache.GetPK(typeof(T)) + "=";
FieldInfo key = typeof(T).GetField(SimpleOrmCache.GetPK(typeof(T)), BindingFlags.IgnoreCase | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (typeof(int) == key.FieldType)
{
sql += pk.ToString();
}
else
{
sql += "'" + pk.ToString() + "'";
}
DataTable dt = dataAccess.SelectDataTable(sql, SimpleOrmCache.GetTableName(typeof(T)));
if (dt != null && dt.Rows.Count > 0)
{
DataRow dr = dt.Rows[0];
return(CreateFromDataRow <T>(dr));
}
else
{
return(default(T));
}
}
/// <summary>
/// 创建一个对象到数据库中,成功后通过select max()来返回主键
/// </summary>
/// <param name="obj">实体对象</param>
/// <returns>是否插入成功</returns>
public static bool Create(object obj)
{
IDataAccess dataAccess = CreateConn();
Type type = obj.GetType();
StringBuilder sql = new StringBuilder(SimpleOrmCache.GetInsertSql(type));
Hashtable table = SimpleOrmCache.GetInsertField(type);
System.Collections.IDictionaryEnumerator enumerator = table.GetEnumerator();
string field = string.Empty;
object value = null;
while (enumerator.MoveNext())
{
field = enumerator.Key.ToString();
value = type.GetField(field, BindingFlags.IgnoreCase | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy).GetValue(obj);
sql.Replace("#" + field + "#", value == null ? "" : DALSecurityTool.TransferInsertField(TransObjectField(value)));
}
bool result = dataAccess.ExecuteSql(sql.ToString());
if (result)//执行把主键赋给对象
{
string pk = SimpleOrmCache.GetPK(type);
object objtmp = dataAccess.SelectScalar("select max(" + pk + ") from " + SimpleOrmCache.GetTableName(type));
if (objtmp != null)
{
FormHelper.SetDataToObject(obj, pk, objtmp);
//FormHelper.SetDataToObject(obj,pk,FormHelper.ParseFieldInfo(obj,objtmp);
//FieldInfo fieldtmp=type.GetField(pk);
//fieldtmp.SetValue(obj, FormHelper.ParseFieldInfo(fieldtmp, objtmp));
}
}
return(result);
}
/// <summary>
/// 更新一个实体对象
/// </summary>
/// <param name="obj">实体对象</param>
/// <returns>是否更新成功</returns>
public static bool Update(object obj)
{
IDataAccess dataAccess = CreateConn();
Type type = obj.GetType();
StringBuilder sql = new StringBuilder(SimpleOrmCache.GetUpdateSql(type));
Hashtable table = SimpleOrmCache.GetUpdateField(type);
System.Collections.IDictionaryEnumerator enumerator = table.GetEnumerator();
string field = string.Empty;
object value = null;
while (enumerator.MoveNext())
{
field = enumerator.Key.ToString();
value = type.GetField(field, BindingFlags.IgnoreCase | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy).GetValue(obj);
sql.Replace("#" + field + "#", value == null ? "" : DALSecurityTool.TransferInsertField(TransObjectField(value)));
}
FieldInfo key = type.GetField(SimpleOrmCache.GetPK(type), BindingFlags.IgnoreCase | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (typeof(int) == key.FieldType)
{
sql.Append(key.GetValue(obj).ToString());
}
else
{
sql.Append("'" + key.GetValue(obj).ToString() + "'");
}
return(dataAccess.ExecuteSql(sql.ToString()));
}
/// <summary>
/// 返回查询条件的记录总数
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="condition">必须带where的条件</param>
/// <returns></returns>
public static int QueryCounts(Type type, string condition)
{
IDataAccess dataAccess = CreateConn();
string sql = "select count(*) from " + SimpleOrmCache.GetTableName(type) + condition;
object obj = dataAccess.SelectScalar(sql);
return(Convert.ToInt32(obj));
}
/// <summary>
/// 删除一个实体对象
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="pk">主键id</param>
/// <returns>是否成功删除</returns>
public static bool Delete <T>(object pk)
{
IDataAccess dataAccess = CreateConn();
if (pk == null || pk.ToString().Length == 0)
{
throw new ArgumentException("删除的PK主键不得为空！");
//return null;
}
string sql = "delete from " + SimpleOrmCache.GetTableName(typeof(T)) + " where " + SimpleOrmCache.GetPK(typeof(T)) + "=" + pk.ToString();
return(dataAccess.ExecuteSql(sql));
}
/// <summary>
/// 比较两实体的主键是否一致，一致认为是一个对象
/// </summary>
/// <param name="obj1"></param>
/// <param name="obj2"></param>
/// <returns></returns>
public static bool EntityIsEqual(object obj1, object obj2)
{
if (obj1.GetType() != obj2.GetType())
{
return(false);
}
else
{
Type type = obj1.GetType();
string pk = SimpleOrmCache.GetPK(type);
object value1 = type.GetField(pk, BindingFlags.IgnoreCase | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy).GetValue(obj1);
object value2 = type.GetField(pk, BindingFlags.IgnoreCase | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy).GetValue(obj2);
return(value1.ToString() == value2.ToString());
}
}
public static bool Delete(object entity)
{
if (entity == null)
{
//throw new ArgumentException("删除的PK主键不得为空！");
return(false);
}
IDataAccess dataAccess = CreateConn();
Type type = entity.GetType();
string pk = SimpleOrmCache.GetPK(type);
object value = type.GetField(pk, BindingFlags.IgnoreCase | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy).GetValue(entity);
string sql = "delete from " + SimpleOrmCache.GetTableName(type) + " where " + pk + "=" + value.ToString();
return(dataAccess.ExecuteSql(sql));
}
/// <summary>
/// 根据datarow创建一个对象出来
/// </summary>
/// <typeparam name="T">泛型</typeparam>
/// <param name="dr">datarow</param>
/// <returns>创建一个对象</returns>
private static object CreateFromDataRow(Type type, DataRow dr)
{
object result = ReflectHelper.CreateInstance(type);
Hashtable table = SimpleOrmCache.GetSelectField(type);
System.Collections.IDictionaryEnumerator enumerator = table.GetEnumerator();
object drvalue = null;
FieldInfo fieldInfo = null;
while (enumerator.MoveNext())
{
drvalue = dr[enumerator.Key.ToString()];
fieldInfo = result.GetType().GetField(enumerator.Value.ToString(), BindingFlags.IgnoreCase | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy | BindingFlags.Public | BindingFlags.Instance);
SetValueToField(result, fieldInfo, drvalue);
}
return(result);
}
/// <summary>
/// 分页查询
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="condition">条件语句</param>
/// <param name="pager">分页对象</param>
/// <param name="order">排序列</param>
/// <param name="isDesc">是否降序</param>
/// <returns></returns>
public List <T> Query <T>(string condition, Pager pager, string order, bool isDesc)
{
IDataAccess dataAccess = CreateConn();
List <T> result = new List <T>();
string sql = dataAccess.GetPageSql(SimpleOrmCache.GetSelectSql(typeof(T)) + condition, pager, order, isDesc);
DataTable dt = dataAccess.SelectDataTable(sql, SimpleOrmCache.GetTableName(typeof(T)));
if (dt != null && dt.Rows.Count > 0)
{
foreach (DataRow dr in dt.Rows)
{
result.Add(CreateFromDataRow <T>(dr));
}
}
return(result);
}
/// <summary>
/// 查询一个对象列表出来出来
/// </summary>
/// <typeparam name="T">泛型</typeparam>
/// <param name="condition">带有where的条件</param>
/// <returns>一个对象</returns>
public static ArrayList QueryConditionList(Type type, string condition)
{
string sql = "select * from " + SimpleOrmCache.GetTableName(type) + " " + condition;
return(QueryList(type, sql));
}
