/// <summary>
/// Select a page of row, optionally getting total count of rows matching Where criteria.
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <typeparam name="TOrder"></typeparam>
/// <param name="pageIndex">0-based page index</param>
/// <param name="pageSize"></param>
/// <param name="descending"></param>
/// <param name="whereExpression"></param>
/// <param name="orderExpression"></param>
/// <param name="countTotal"></param>
/// <returns></returns>
public virtual async Task <RepositoryResult <TEntity> > FindPageAsync <TEntity, TOrder>(int pageIndex, int pageSize, bool descending
, Expression <Func <TEntity, bool> > whereExpression, Expression <Func <TEntity, TOrder> > orderExpression
, bool countTotal)
where TEntity : class
{
var result = new RepositoryResult <TEntity>();
Task <List <TEntity> > listQuery = FindPageQuery(pageIndex, pageSize
, descending, whereExpression, orderExpression)
.ToListAsync();
Task <long> countQuery = null;
if (countTotal)
{
countQuery = Context.Set <TEntity>()
.Where(whereExpression)
.LongCountAsync();
}
result.Data = await listQuery.ConfigureAwait(false);
if (countTotal)
{
result.TotalRows = await countQuery.ConfigureAwait(false);
}
return(result);
}
/// <summary>
/// Select a page of row, optionally getting total count of rows matching Where criteria.
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <typeparam name="TOrder"></typeparam>
/// <param name="pageIndex">0-based page index</param>
/// <param name="pageSize"></param>
/// <param name="descending"></param>
/// <param name="whereExpression"></param>
/// <param name="orderExpression"></param>
/// <param name="countTotal"></param>
/// <returns>If page number starts from 0, otherwise from 1.</returns>
public virtual RepositoryResult <TEntity> FindPage <TEntity, TOrder>(int pageIndex, int pageSize, bool descending
, Expression <Func <TEntity, bool> > whereExpression, Expression <Func <TEntity, TOrder> > orderExpression
, bool countTotal)
where TEntity : class
{
var result = new RepositoryResult <TEntity>();
result.Data = FindPageQuery(pageIndex, pageSize
, descending, whereExpression, orderExpression)
.ToList();
if (countTotal)
{
result.TotalRows = Context.Set <TEntity>()
.Where(whereExpression)
.LongCount();
}
return(result);
}
