/// <summary>
/// automatically transform T to TDto,according to property-flatten pattern like automapper.(Use Caption to identiyfy words)
/// </summary>
/// <typeparam name="TDto"></typeparam>
/// <param name="pager"></param>
/// <param name="where"></param>
/// <param name="sort"></param>
/// <param name="propNameMap">use this to manually set mapping propname of DTO to prop of DO.words are delimetered by '|'
/// </param>
/// <returns></returns>
public virtual IList <TDto> GetDtoList <TDto>(Pager pager, Expression <Func <T, bool> > where = null, string sort = null, IDictionary <string, string> propNameMap = null)
{
//following to make lamda like o=>new DTO{Id=o.Id,Other=o.Other}}
var props = typeof(TDto).GetProperties().Where(o => o.CanWrite).ToArray();
MemberBinding[] propExprs = null;
var parameterExpr = Expression.Parameter(typeof(T), "o");
var newDtoExpr = Expression.New(typeof(TDto));//new TDto;
Array.Resize(ref propExprs, props.Count());
for (var i = 0; i < props.Count(); i++)//Id=o.Id;ReferenceId=o.Reference??null:o.Reference.Id
{
var entityPropExpr = (propNameMap != null && propNameMap.ContainsKey(props[i].Name))
? ChainedPropExprByMap(parameterExpr, propNameMap[props[i].Name], typeof(T), props[i].PropertyType)
: ChainedPropExpr(parameterExpr, props[i].Name, typeof(T), props[i].PropertyType);
if (entityPropExpr == null)
{
throw new Exception("can't figure out " + props[i].Name);
}
MemberAssignment assign;
try
{
assign = Expression.Bind(props[i], entityPropExpr);
}catch (ArgumentException e)
{
throw new Exception("assignment error：" + props[i].Name + " " + e.Message);
}
propExprs[i] = assign;
}
var initExpr = Expression.MemberInit(newDtoExpr, propExprs);
var selector = Expression.Lambda <Func <T, TDto> >(initExpr, new ParameterExpression[] { parameterExpr });
return(pager == null?_dao.GetProjectionByQuery(where, SortStruc <T> .CreateFrom(sort), selector) : _dao.GetProjectionByQuery(pager, where, SortStruc <T> .CreateFrom(sort), selector));
}
public virtual IList <DORef <T> > GetRefList(Expression <Func <T, bool> > where = null, string sort = null)
{
return(_dao.GetProjectionByQuery(where, SortStruc <T> .CreateFrom(sort), o => new DORef <T> {
Id = o.Id, RefText = o.RefText
}));
}
public virtual T GetOneByQuery(Expression <Func <T, bool> > where, string sort = null, bool unique = true)
{
return(_dao.GetOneByQuery(where, SortStruc <T> .CreateFrom(sort), unique));
}
public virtual IList <T> GetByQuery(Pager pager, Expression <Func <T, bool> > where = null, string sort = null)
{
return(_dao.GetByQuery(pager, where, SortStruc <T> .CreateFrom(sort)));
}
public virtual IList <TDto> GetDtoList <TDto>(Pager pager, Expression <Func <T, bool> > where = null, string sort = null, Expression <Func <T, TDto> > selector = null)
{
return(_dao.GetProjectionByQuery(pager, where, SortStruc <T> .CreateFrom(sort), selector));
}