本文介绍了WP8 KnownContactProperties.Birthdate不能设置值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
var store = await ContactStore.CreateOrOpenAsync();
StoredContact sc = new StoredContact(store);
IDictionary<string, object> values = await sc.GetPropertiesAsync();
values[KnownContactProperties.FamilyName] = "bbb";
values[KnownContactProperties.GivenName]= "worerrrrld";
//*************problem here**************
Nullable<DateTime> birth = DateTime.Now;
values[KnownContactProperties.Birthdate] = birth;
//values[KnownContactProperties.Birthdate] = DateTime.Now;
//values[KnownContactProperties.Birthdate] = "2010-05-10";
//it will cause exception by any way above.
//***************************************
await sc.SaveAsync();//Exception throw here :System.InvalidCastException
phone8 API
About windows phone8 API
Windows.Phone.PersonalInformation 命名空间
对于 StoredContact ！
可以任何身体帮助我太奇怪了！如何设置 KnownContactProperties.Birthdate ？
Can any body help me! How to set this KnownContactProperties.Birthdate?
推荐答案
InvalidCastException是正常的因为预期对象为DateTimeOffset。
The InvalidCastException is normal since the expected object is DateTimeOffset.
请尝试以下操作：
values[KnownContactProperties.Birthdate] = new DateTimeOffset(DateTime.Parse("2010-05-10"));
回答。
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