/// <summary>
/// 获取列名信息
/// </summary>
/// <param name="modelType"></param>
/// <param name="propertyName"></param>
/// <returns></returns>
DbColumnAttribute IDbMappingHandler.GetDbColumnSingle(Type modelType, string propertyName)
{
Dictionary <PropertyInfo, DbColumnAttribute> columnMappings = DbMappingCache.GetColumns(modelType);
if (null == columnMappings)
{
return(null);
}
return(columnMappings.FirstOrDefault(d => d.Key.Name == propertyName).Value);
}
/// <summary>
/// 获取符合条件的列集合信息
/// </summary>
/// <param name="modelType"></param>
/// <param name="exp"></param>
/// <returns></returns>
DbColumnAttribute[] IDbMappingHandler.GetDbColumnCollection(Type modelType, Expression <Func <DbColumnAttribute, bool> > exp)
{
Dictionary <PropertyInfo, DbColumnAttribute> columnMappings = DbMappingCache.GetColumns(modelType);
if (null == columnMappings)
{
return(null);
}
if (null == exp)
{
return(columnMappings.Values.ToArray());
}
else
{
return(columnMappings.Values.Where(exp.Compile()).ToArray());
}
}
/// <summary>
/// 获取符合条件的模型属性集合
/// </summary>
/// <param name="modelType"></param>
/// <param name="exp"></param>
/// <returns></returns>
PropertyInfo[] IDbMappingHandler.GetPropertyCollection(Type modelType, Expression <Func <DbColumnAttribute, bool> > exp)
{
Dictionary <PropertyInfo, DbColumnAttribute> columnMappings = DbMappingCache.GetColumns(modelType);
if (null == columnMappings)
{
return(null);
}
if (null == exp)
{
return(columnMappings.Keys.ToArray());
}
else
{
List <PropertyInfo> pis = new List <PropertyInfo>();
foreach (var item in columnMappings.Values.Where(exp.Compile()))
{
pis.Add(columnMappings.FirstOrDefault(d => d.Value.DbColumnName == item.DbColumnName).Key);
}
return(pis.ToArray());
}
}