//删除数据
public bool Delete <T>(object id)
{
try
{
Type type = typeof(T);
string table = AttributeProcess.GetTableName(type);
string sql = "DELETE FROM " + table + " WHERE ";
PropertyInfo[] properties = type.GetProperties();
foreach (PropertyInfo property in properties)
{
if (AttributeProcess.IsPrimary(type, property))
{
sql += (AttributeProcess.GetColumnName(property) + "=");
if (property.PropertyType.IsPrimitive)
{
sql += (id.ToString() + ";");
}
else
{
sql += ("\'" + id.ToString() + "\';");
}
}
}
ExecuteQuery(sql);
return(true);
}
catch (Exception e)
{
throw e;
}
finally
{
CloseSqlConnection();
}
}
//public ORMHelper<T> Where(object field, string op = null, string condition = null)//查询逻辑 and or xor
//{
// this.ParseWhereExp("AND", field, op, condition);
// return this;
//}
//public ORMHelper<T> WhereOr(object field, string op = null, string condition = null)
//{
// this.ParseWhereExp("OR", field, op, condition);
// return this;
//}
//protected void ParseWhereExp(string logic, object field, string op, string condition)
//{
// if (field is string)
// {
// WhereParam wp = new WhereParam
// {
// logic = logic,
// filed = field.ToString(),
// op = op,
// condition = condition
// };
// conditions.Enqueue(wp);
// }
// else if (field is Dictionary<string, string>)
// {
// foreach (var item in (Dictionary<string, string>)field)
// {
// WhereParam wp = new WhereParam
// {
// logic = logic,
// filed = item.Key,
// op = "=",
// condition = item.Value
// };
// conditions.Enqueue(wp);
// }
// }
//}
///// <summary>
///// 创建子查询SQL
///// </summary>
///// <returns></returns>
//public string BuildSql()
//{
// string sql = string.Empty,
// str_fileds = string.Empty,
// str_where = string.Empty;
// while (conditions.Count > 0)
// {
// WhereParam wp = conditions.Dequeue();
// if (string.IsNullOrEmpty(str_where))
// {
// str_where = string.Format("where {0}{1}{2}",wp.filed,wp.logic);
// }
// }
// return sql;
//}
#endregion
/// <summary>
/// 查找单条记录
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql">sql指令</param>
/// <returns></returns>
public T Find <T>(string sql)
{
//if (string.IsNullOrEmpty(sql)) sql = this.BuildSql();
DbDataReader reader = DbHelper.GetDataReader(sql);
Type type = typeof(T);
try
{
if (type.IsPrimitive || type == typeof(string) || type == typeof(DateTime) || type.IsEnum)
{
if (type.IsEnum)
{
return((T)Enum.ToObject(type, reader.GetValue(0)));
}
else
{
return((T)Convert.ChangeType(reader.GetValue(0), type));
}
}
else
{
T result = Activator.CreateInstance <T>();
PropertyInfo[] properyies = type.GetProperties();
string columName;
foreach (PropertyInfo property in properyies)
{
columName = AttributeProcess.GetColumnName(property);
if (!ReaderExists(reader, columName))
{
continue;
}
var value = reader.GetValue(reader.GetOrdinal(columName));
if (property.PropertyType.IsPrimitive && value.Equals(DBNull.Value))
{
value = Activator.CreateInstance(property.PropertyType);
}
if (property.PropertyType.IsEnum)
{
property.SetValue(result, Enum.ToObject(property.PropertyType, value), null);
}
else
{
property.SetValue(result, Convert.ChangeType(value, property.PropertyType), null);
}
}
return(result);
}
}
catch (Exception ex)
{
throw new Exception(sql, ex);
}
finally
{
reader.Close();
}
}
//插入新数据
public bool Insert <T>(T data)
{
try
{
Type type = data.GetType();
string table = AttributeProcess.GetTableName(type);
List <string> columns = new List <string>();
List <string> values = new List <string>();
PropertyInfo[] properties = type.GetProperties();
foreach (PropertyInfo property in properties)
{
if (!(AttributeProcess.IsPrimary(type, property) && AttributeProcess.IsIncrement(type)))
{
if (property.GetValue(data, null) != null)
{
columns.Add(AttributeProcess.GetColumnName(property));
if (property.PropertyType == typeof(bool))
{
bool value = bool.Parse(property.GetValue(data, null).ToString());
values.Add((value ? "1" : "0"));
}
else if (property.PropertyType.IsPrimitive)
{
values.Add(property.GetValue(data, null).ToString());
}
else if (property.PropertyType.IsEnum)
{
int intValue = (int)property.GetValue(data, null);
values.Add(intValue.ToString());
}
else
{
if (Sql.InjectionDefend(property.GetValue(data, null).ToString()))
{
values.Add("\'" + property.GetValue(data, null) + "\'");
}
}
}
}
}
string sql = "INSERT INTO " + table + "(" + string.Join(",", columns) + ")" + "VALUES" + "(" + string.Join(",", values) + ")";
ExecuteQuery(sql);
return(true);
}
catch (Exception e)
{
throw e;
}
finally
{
CloseSqlConnection();
}
}
//查询所有符合条件的记录
public List <T> Fetch <T>(Sql sql)
{
try
{
ExecuteQuery(sql.GetSql());
List <T> list = new List <T>();
Type type = typeof(T);
if (type.IsPrimitive || type == typeof(string) || type == typeof(DateTime) || type.IsEnum)
{
while (reader.Read())
{
if (type.IsEnum)
{
list.Add((T)Enum.ToObject(type, reader.GetValue(0)));
}
else
{
list.Add((T)Convert.ChangeType(reader.GetValue(0), type));
}
}
}
else
{
while (reader.Read())
{
T result = Activator.CreateInstance <T>();
PropertyInfo[] properties = type.GetProperties();
foreach (PropertyInfo property in properties)
{
string columName = AttributeProcess.GetColumnName(property);
if (property.PropertyType.IsEnum)
{
property.SetValue(result, Enum.ToObject(property.PropertyType, reader.GetValue(reader.GetOrdinal(columName))), null);
}
else
{
property.SetValue(result, Convert.ChangeType(reader.GetValue(reader.GetOrdinal(columName)), property.PropertyType), null);
}
}
list.Add(result);
}
}
return(list);
}
catch (Exception e)
{
throw e;
}
finally
{
CloseSqlConnection();
}
}
//更新指定的记录
public bool Update <T>(T data)
{
try
{
Type type = data.GetType();
string table = AttributeProcess.GetTableName(type);
string sql = "Update " + table + " Set ";
List <string> sets = new List <string>();
string where = " Where ";
PropertyInfo[] properties = type.GetProperties();
foreach (PropertyInfo property in properties)
{
string column = AttributeProcess.GetColumnName(property);
if (!AttributeProcess.IsPrimary(type, property))
{
if (property.PropertyType == typeof(bool))
{
bool value = bool.Parse(property.GetValue(data, null).ToString());
sets.Add(column + "=" + (value ? "1" : "0"));
}
else if (property.PropertyType.IsPrimitive)
{
sets.Add(column + "=" + property.GetValue(data, null));
}
else if (property.PropertyType.IsEnum)
{
int intValue = (int)property.GetValue(data, null);
sets.Add(column + "=" + intValue);
}
else
{
if (Sql.InjectionDefend(property.GetValue(data, null).ToString()))
{
sets.Add(column + "=\'" + property.GetValue(data, null) + "\'");
}
}
}
else
{
if (property.PropertyType.IsPrimitive)
{
where += column + "=" + property.GetValue(data, null);
}
else
{
where += column + "=\'" + property.GetValue(data, null) + "\'";
}
}
}
sql += (string.Join(",", sets) + where);
ExecuteQuery(sql);
return(true);
}
catch (Exception e)
{
throw e;
}
finally
{
CloseSqlConnection();
}
}
