public override string DbConditionSqlBuilder(List <DBMemberEntity> entities)
{
StringBuilder sb = new StringBuilder();
if (entities == null || entities.Count == 0)
{
return(null);
}
sb.Append(" where ");
for (int i = 0; i < entities.Count; i++)
{
DBMemberEntity entity = entities[i];
if (!string.IsNullOrEmpty(entity.MemberBelong))
{
sb.Append(entity.MemberBelong);
sb.Append(".");
}
sb.Append(entity.MemberName);
switch (entity.QueryType)
{
case QueryTypeEnum.equal:
sb.Append("=");
break;
case QueryTypeEnum.lt:
sb.Append("<");
break;
case QueryTypeEnum.grant:
sb.Append(">");
break;
case QueryTypeEnum.fruzz:
sb.Append(" like ");
break;
case QueryTypeEnum.notequal:
sb.Append(" <> ");
break;
default:
break;
}
sb.Append("@");
sb.Append(entity.MemberName);
if (entity.QueryType == QueryTypeEnum.fruzz)
{
entity.MemberValue = string.Format("%{0}%", entity.MemberValue);
}
if (i < entities.Count - 1)
{
sb.Append(" and ");
}
}
return(sb.ToString());
}
/// <summary>
/// 获得不为空的实体信息
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public static List <DBMemberEntity> GetEntityInfo <T>(T model) where T : new()
{
List <DBMemberEntity> entitylist = new List <DBMemberEntity>();
PropertyInfo[] piinfo = typeof(T).GetProperties();
foreach (PropertyInfo pi in piinfo)
{
if (pi.GetValue(model) == null)
{
continue;
}
if (typeof(List <>).Name == pi.PropertyType.Name)
{
continue;
}
DBMemberEntity entity = new DBMemberEntity();
entity.MemberName = pi.Name;
entity.MemberValue = pi.GetValue(model);
//Int32 置空
if (pi.GetType() == typeof(System.Int32))
{
entity.MemberType = DbType.Int32;
if (Convert.ToInt32(entity.MemberValue) == Int32.MinValue)
{
entity.MemberValue = DBNull.Value;
}
}
//Decimal 置空
if (pi.GetType() == typeof(System.Decimal))
{
entity.MemberType = DbType.Decimal;
if (Convert.ToDecimal(entity.MemberValue) == Decimal.MinValue)
{
entity.MemberValue = DBNull.Value;
}
}
//Datetime 置空
if (pi.GetType() == typeof(System.DateTime))
{
entity.MemberType = DbType.DateTime;
if (Convert.ToDateTime(entity.MemberValue) == DateTime.MinValue)
{
entity.MemberValue = DBNull.Value;
}
}
entitylist.Add(entity);
}
return(entitylist);
}
/// <summary>
/// 添加对象
/// </summary>
/// <param name="entities"></param>
/// <param name="MemberName">成员名称</param>
/// <param name="MemberValue">成员值</param>
/// <param name="MemberBelong">成员所属表 t,a,b等</param>
/// <param name="MemberType">成员数据对象</param>
/// <param name="qte">成员条件类型</param>
public static void AddMember(this List <DBMemberEntity> entities, string MemberName, object MemberValue, QueryTypeEnum qte = QueryTypeEnum.equal, string MemberBelong = null, DbType MemberType = DbType.String)
{
DBMemberEntity entity = new DBMemberEntity()
{
MemberName = MemberName,
MemberType = MemberType,
MemberValue = MemberValue,
QueryType = qte,
MemberBelong = MemberBelong
};
entities.Add(entity);
}
