使用来自另一个实例的属性子集以类型安全的方式创建实例？(Create an instance using a subset of properties from another instance in a type safe manner?)

我有一个数据源，我不想绑定X的集合。 X应包含特定类型Y的属性的子集（假设Y具有属性PropOne，PropTwo，PropThree）这当然可以使用匿名类型完成：

void DoBind() { myGrid.DataSource = myCollectionOfYs.Select(y => new {y.PropOne, y.PropTwo}); }

如何修改此方法，以便它的调用者可以以类型安全的方式指定在投影中使用哪些属性？ 也就是说：

var expressions = new List<Expression<Func<Y, object>>>(); expressions.Add(y => y.PropOne); expressions.Add(y => y.PropTwo); DoBind(expressions);

I have a data source to which I wan't to bind a collection of X's. X should contain a subset of a certain type Y's properties (let's say Y has properties PropOne, PropTwo, PropThree) This can of course be done with an anonymous type:

void DoBind() { myGrid.DataSource = myCollectionOfYs.Select(y => new {y.PropOne, y.PropTwo}); }

How can I modify this method so that the caller of it can specify which properties to use in the projection in a type safe way? I.e. something along the lines:

var expressions = new List<Expression<Func<Y, object>>>(); expressions.Add(y => y.PropOne); expressions.Add(y => y.PropTwo); DoBind(expressions);

最满意答案

用你的想法：

void DoBind(Func<Y, object> func) { myGrid.DataSource = myCollectionOfYs.Select(funct); }

并使用如下：

DoBind(y => new {y.PropOne});

Using your idea:

void DoBind(Func<Y, object> func) { myGrid.DataSource = myCollectionOfYs.Select(funct); }

And use like:

DoBind(y => new {y.PropOne});使用来自另一个实例的属性子集以类型安全的方式创建实例？(Create an instance using a subset of properties from another instance in a type safe manner?)

我有一个数据源，我不想绑定X的集合。 X应包含特定类型Y的属性的子集（假设Y具有属性PropOne，PropTwo，PropThree）这当然可以使用匿名类型完成：

void DoBind() { myGrid.DataSource = myCollectionOfYs.Select(y => new {y.PropOne, y.PropTwo}); }

如何修改此方法，以便它的调用者可以以类型安全的方式指定在投影中使用哪些属性？ 也就是说：

var expressions = new List<Expression<Func<Y, object>>>(); expressions.Add(y => y.PropOne); expressions.Add(y => y.PropTwo); DoBind(expressions);

I have a data source to which I wan't to bind a collection of X's. X should contain a subset of a certain type Y's properties (let's say Y has properties PropOne, PropTwo, PropThree) This can of course be done with an anonymous type:

void DoBind() { myGrid.DataSource = myCollectionOfYs.Select(y => new {y.PropOne, y.PropTwo}); }

How can I modify this method so that the caller of it can specify which properties to use in the projection in a type safe way? I.e. something along the lines:

var expressions = new List<Expression<Func<Y, object>>>(); expressions.Add(y => y.PropOne); expressions.Add(y => y.PropTwo); DoBind(expressions);

最满意答案

用你的想法：

void DoBind(Func<Y, object> func) { myGrid.DataSource = myCollectionOfYs.Select(funct); }

并使用如下：

DoBind(y => new {y.PropOne});

Using your idea:

void DoBind(Func<Y, object> func) { myGrid.DataSource = myCollectionOfYs.Select(funct); }

And use like:

DoBind(y => new {y.PropOne});