wpf 如何从 ObservableCollection 中获取第一个对象?

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时间:2020-09-13 11:38:01  来源:igfitidea点击:

How to get the first object from an ObservableCollection?

c#wpfobjectobservablecollection

提问by user3524628

I would like to get the first object in an ObservableCollection like this:

我想像这样获得 ObservableCollection 中的第一个对象:

Customer pCustomer = new Customer();
pCustomer = this.CustomerDataObject.First;

public ObservableCollection<Customer> CustomerDataObject
{
    get
    {
        return mCustomerDataObject;
    }
}

Is it possible at all?

有可能吗?

回答by Sriram Sakthivel

Firstis not a property it is an extension method.

First不是属性,而是扩展方法。

var first = CustomerDataObject.First();

If no element, Firstwill throw exception, You can use FirstOrDefaultin that case which will return null.

如果没有元素,First将抛出异常,您可以在这种情况下使用FirstOrDefault,它会返回 null。

var firstOrDefault = CustomerDataObject.FirstOrDefault();