I want to retrieve a specific contact, and update its group membership. I already know the self link of the contact. To get the specific contact, the developer's guide says to do this:
我想检索特定联系人，并更新其组成员身份。我已经知道联系人的自我链接了。要获得具体联系，开发人员指南要说：
//The example assumes the ContactRequest object (cr) is already set up.
//该示例假定已设置ContactRequest对象（cr）。
Contact c = cr.Retrieve<Contact>("http://www.google.com/m8/feeds/contacts/liz%40gmail.com/full/12345");
but when I compile this, I get an error:
但是当我编译它时，我收到一个错误：
Argument 1: cannot convert from 'string' to 'Google.Contacts.Contact'
参数1：无法从'string'转换为'Google.Contacts.Contact'
If I change it to:
如果我将其更改为：
Contact c = cr.Retrieve<Contact>(new Uri("http://www.google.com/m8/feeds/contacts/liz%40gmail.com/full/12345"));
then it compiles, and seems to retrieve okay, but I'm unable to update the contact's group membership:
然后它编译，似乎检索没问题，但我无法更新联系人的组成员身份：
c.GroupMembership.Add(member2);
cr.Update(c);
as the cr.Update(c) line throws a GDataRequestException (400 Bad Request) with a response string of:
因为cr.Update（c）行抛出一个GDataRequestException（400 Bad Request），响应字符串为：
"Group membership information not supported"
“不支持组成员资格信息”
What am I doing wrong?
我究竟做错了什么？
1 个解决方案
#1
2
I figured out what I was doing wrong...
我弄清楚我做错了什么......
When retrieving the contact, I was using the "Id" property, instead of the "Self" property.
检索联系人时，我使用的是“Id”属性，而不是“Self”属性。
The "Id" property has "base" projection, while the "Self" property has "Full" projection.
“Id”属性具有“基础”投影，而“自”属性具有“完全”投影。
Once I switched to using "Self" it worked properly.
一旦我切换到使用“Self”，它就能正常工作。
#1
2
I figured out what I was doing wrong...
我弄清楚我做错了什么......
When retrieving the contact, I was using the "Id" property, instead of the "Self" property.
检索联系人时，我使用的是“Id”属性，而不是“Self”属性。
The "Id" property has "base" projection, while the "Self" property has "Full" projection.
“Id”属性具有“基础”投影，而“自”属性具有“完全”投影。
Once I switched to using "Self" it worked properly.
一旦我切换到使用“Self”，它就能正常工作。