C# 如何在sharepoint 2013中通过用户的登录名获取用户配置文件的URL？

得到了这个存储库代码

public IEnumerable<FollowedPerson> ReadFollowedPersonsById(int id, SPList list)
{
    var item = list.GetItemById(id);
    if (item == null)
    {
        return null;
    }
    var likedByCollection = (SPFieldUserValueCollection)item["LikedBy"];
    if (likedByCollection == null)
    {
        return null;
    }
    var followers = new Collection<FollowedPerson>();
    foreach (var liker in likedByCollection)
    {
        followers.Add(new FollowedPerson
            {
                Name = liker.User.Name,
                ImageUrl = string.Empty //TODO Urls of users avatars
            });
    }
    return followers;
} 

获取他们的名字很好，但我不知道如何通过他们的登录名获取他们的头像

liker.User //does not contain any url of user`s image

---

您可以从用户配置文件中获取此信息。您可以在此处了解如何使用它：。 有用于检索所有用户配置文件属性的代码段：

// Replace the following placeholder values with the target SharePoint site and
// target user.
const string serverUrl = "http://serverName/";  
const string targetUser = "domainName\\userName";  

// Connect to the client context.
ClientContext clientContext = new ClientContext(serverUrl);

// Get the PeopleManager object and then get the target user's properties.
PeopleManager peopleManager = new PeopleManager(clientContext);
PersonProperties personProperties = peopleManager.GetPropertiesFor(targetUser);

// Load the request and run it on the server.
// This example requests only the AccountName and UserProfileProperties
// properties of the personProperties object.
clientContext.Load(personProperties, p => p.AccountName, p => p.UserProfileProperties);
clientContext.ExecuteQuery();

foreach (var property in personProperties.UserProfileProperties)
{
     Console.WriteLine(string.Format("{0}: {1}", 
         property.Key.ToString(), property.Value.ToString()));
}

---

但是如果我没有用户帐户名呢？SPUser类只给我用户Sid、LoginName和Id@k.makarov，LoginName等于用户帐户名，不是吗？我想它也等于。但实际的登录名和帐户名并不相等。所以我尝试用谷歌搜索这个解决方案——从中使用他的登录名获取用户配置文件图像urlSPUser@k.makarov，我想这可能会有帮助。2013年，您的登录名包含身份验证提供商信息（因为索赔）。您可以使用文章中的代码对其进行转换。

// Replace the following placeholder values with the target SharePoint site and
// target user.
const string serverUrl = "http://serverName/";  
const string targetUser = "domainName\\userName";  

// Connect to the client context.
ClientContext clientContext = new ClientContext(serverUrl);

// Get the PeopleManager object and then get the target user's properties.
PeopleManager peopleManager = new PeopleManager(clientContext);
PersonProperties personProperties = peopleManager.GetPropertiesFor(targetUser);

// Load the request and run it on the server.
// This example requests only the AccountName and UserProfileProperties
// properties of the personProperties object.
clientContext.Load(personProperties, p => p.AccountName, p => p.UserProfileProperties);
clientContext.ExecuteQuery();

foreach (var property in personProperties.UserProfileProperties)
{
     Console.WriteLine(string.Format("{0}: {1}", 
         property.Key.ToString(), property.Value.ToString()));
}