public static IQueryable <T> ApplyOrderBy <T>(this IQueryable <T> source,
string propertyName, string orderType = "asc")
{
var expression = PropertyAccesor <T> .Get(propertyName);
if (expression == null)
{
return(source);
}
//Ordenar ascendentemente por defecto
var type = nameof(Queryable.OrderBy);
//Ordenar descendentemente si es otro valor
if (!string.IsNullOrEmpty(orderType) && orderType == "desc")
{
type = nameof(Queryable.OrderByDescending);
}
MethodCallExpression resultExpression = Expression.Call(
typeof(Queryable),
type,
new Type[] { typeof(T), expression.ReturnType },
source.Expression,
Expression.Quote(expression));
return(source.Provider.CreateQuery <T>(resultExpression));
}
public static IQueryable <T> ApplyWhere <T>(this IQueryable <T> source, string propertyName,
object propertyValue)
{
var mba = PropertyAccesor <T> .Get(propertyName);
if (mba == null)
{
return(source);
}
object value;
try
{
value = Convert.ChangeType(propertyValue, mba.ReturnType);
}
catch (Exception ex)
{
return(source);
}
var eqe = Expression.Equal(
mba.Body,
Expression.Constant(value, mba.ReturnType));
var expression = Expression.Lambda(eqe, mba.Parameters[0]);
MethodCallExpression resultExpression = Expression.Call(
null,
GetMethodInfo(Queryable.Where, source, (Expression <Func <T, bool> >)null),
new Expression[] { source.Expression, Expression.Quote(expression) });
return(source.Provider.CreateQuery <T>(resultExpression));
}
private void GrabObjects()
{
if (toolBar != null)
{
return;
}
FieldAccesor toolBarAccesor = new FieldAccesor(propertyGrid, "toolBar");
if (toolBarAccesor.IsValid)
{
toolBarAccesor.Get();
}
else
{
toolBarAccesor = new FieldAccesor(propertyGrid, "toolStrip");
toolBarAccesor.Get();
// for a toolstrip we have to "fix" the readonly stuff on the controls :(
Control strip = toolBarAccesor.Value as Control;
FieldAccesor readonlyFlag = new FieldAccesor(strip.Controls, "_isReadOnly");
readonlyFlag.Set(false);
}
toolBar = toolBarAccesor.Value as Control;
AttachNewToolButtons();
FieldAccesor gridViewAccesor = new FieldAccesor(propertyGrid, "gridView");
gridViewAccesor.Get();
this.gridView = gridViewAccesor.Value;
allGridItemsAC = new FieldAccesor(gridView, "allGridEntries");
topLevelGridItemsAC = new FieldAccesor(gridView, "topLevelGridEntries");
totalProps = new FieldAccesor(gridView, "totalProps");
selectedRow = new FieldAccesor(gridView, "selectedRow");
setScrollOffset = new MethodAccesor(gridView.GetType(), "SetScrollOffset");
selectGridEntry = new PropertyAccesor(gridView, "SelectedGridEntry");
layoutWindow = new MethodAccesor(gridView.GetType(), "Refresh");
propertyGrid.SelectedObjectsChanged += new EventHandler(propertyGrid_SelectedObjectsChanged);
propertyGrid.PropertyTabChanged += new PropertyTabChangedEventHandler(propertyGrid_PropertyTabChanged);
propertyGrid.PropertySortChanged += new EventHandler(propertyGrid_PropertySortChanged);
}
