Question

这是另一篇文章的延续。我试图创建一个界面，让我遍历一组对象，并访问对象属性的名称。

Report对象将有ReportSections。 ReportSection将有一个ICollection项目，这些项目将根据使用情况而变化。

以下是我现在尝试定义的方式。

public interface IReport
{
    string ReportName { get; set; }

    ICollection<IReportSection> ReportSections { get; }
}

public interface IReportSection
{
    string ReportSectionName { get; set; }

    ICollection ReportItems { get; }
}

public abstract class ReportBase : IReport
{
    virtual public string ReportType { get; set; }

    virtual public string ReportName { get; set; }

    virtual public ICollection<IReportSection> ReportSections { get; set; }

}

public abstract class ReportSectionBase : IReportSection
{
    public string ReportSectionName { get; set; }

    public ICollection ReportItems { get; set; }
}

在我的代码中，我会这样做：

public class BookAffiliates : ReportSectionBase
{
    public override string ReportSectionName { get { return "Book Affiliates"; } }

    public override ICollection ReportItems { get; set; }
}

public class SomeClass
{
    public ICollection<AuthorsViewModel> Authors { get; set; }

    public ICollection<ProjectSubmissionViewModel> Submissions { get; set; }

    public string ProcessAuthorsReport()
    {
        var report = new ContribAuthorsReport{ ReportType = "CSV" };

        var authorAffil = new BookAffiliates {ReportItems = Authors };
        report.ReportSections.Add(chapAffil);

        var submissionAffil = new BookAffiliates {ReportItems = Submissions};
        report.ReportSections.Add(submissionAffil );

        return RenderReport(report)
    }

}

在RenderReport中，我想浏览这些集合并使用PropertyNames：

private string RenderReport(ReportBase currentReport)
{
    var reportBody = new StringBuilder();
    reportBody.Append(currentReport.ReportName + Environment.NewLine + Environment.NewLine);

    foreach (var thisSection in currentReport.ReportSections)
    {
        reportBody.Append(thisSection.ReportSectionName + Environment.NewLine);

        /// ---- Here! Here! I don't know what type, I want the 
        /// code to get the type based on ReportSectionBase<T>
        var firstItem = thisSection.ReportItems.OfType<???Type???>().FirstOrDefault();

        // I would actually like to go through each property of 
        // the ReportItem type and list it here.
        foreach(var prop in firstItem.GetType().GetProperties()) 
        {
               reportBody.AppendLine(string.Format("{0}:{1}" prop.Name, prop.Value));
        }
    }

    return reportBody.ToString();
}

我不确定如何最好地定义它。我很确定我之前已经做过，但它没有找到我。

Answer 1

你会使用Reflection来做到这一点。

int BBGameCenter::GameCenterState(){
    return _state;
    }
void BBGameCenter::ShowLeaderboard( String leaderboard_ID ){

    if( _state!=2 ) return;

    GKLeaderboardViewController *vc=[[GKLeaderboardViewController alloc] init];
    if( !vc ) return;

    vc.leaderboardDelegate=(id)_delegate;
    vc.timeScope=GKLeaderboardTimeScopeToday;
    vc.category=leaderboard_ID.ToNSString();

    _state=3;

    /
    /
    [BBIosGame::IosGame()->GetUIAppDelegate()->viewController presentModalViewController:vc animated:YES];
}
void BBGameCenter::ReportScore( int value,String leaderboard_ID ){

    if( _state!=2 ) return;

    GKScore *score=[[GKScore alloc] initWithCategory:leaderboard_ID.ToNSString()];

    score.value=value;
    score.context=0;

    [score reportScoreWithCompletionHandler:^(NSError *error){} ];
}
void BBGameCenter::ShowAchievements(){

    if( _state!=2 ) return;

    GKAchievementViewController *vc=[[GKAchievementViewController alloc] init];
    if( !vc ) return;

    vc.achievementDelegate=(id)_delegate;

    _state=4;

    /
    /
    [BBIosGame::IosGame()->GetUIAppDelegate()->viewController presentModalViewController:vc animated:YES];
}
GKAchievement *BBGameCenter::FindAchievement( String id ){
    if( !_achievements ) return 0;
    NSString *str=id.ToNSString();
    int n=[_achievements count];
    for( int i=0;i<n;++i ){
        GKAchievement *achievement=[_achievements objectAtIndex:i];
        if( [achievement.identifier isEqualToString:str] ) return achievement;
    }
    return 0;
}
void BBGameCenter::ReportAchievement( float percent,String achievement_ID ){

    if( _state!=2 ) return;

    GKAchievement *achievement=FindAchievement( achievement_ID );
    if( !achievement ){
        achievement=[[GKAchievement alloc] initWithIdentifier:achievement_ID.ToNSString()];
        [_achievements addObject:achievement];
    }

    achievement.percentComplete=percent;
    achievement.showsCompletionBanner=true;

    [achievement reportAchievementWithCompletionHandler:^(NSError *error){} ];
}
float BBGameCenter::GetAchievementPercent( String achievement_ID ){

    GKAchievement *achievement=FindAchievement( achievement_ID );
    if( !achievement ) return 0;

    return achievement.percentComplete;
}
void BBGameCenter::GameCenterViewControllerDidFinish( UIViewController *vc ){

    _state=2;

   /
    /
    [BBIosGame::IosGame()->GetUIAppDelegate()->viewController dismissModalViewControllerAnimated:YES];
}

Answer 2

花了一段时间，很多问题，并弄清楚我真正想问的问题。我想出了这个。

以下是我的接口和基类：

DataContext

我创建这样的对象：

public class ReportBase
{
    public ReportBase()
    {
        ReportSections = new List<IReportSection>();
    }

    public string ReportType { get; set; }

    public string ReportName { get; set; }

    public ICollection<IReportSection> ReportSections { get; set; }

}
public interface IReportSection
{
    string ReportSectionName { get; }

    ICollection ReportItems { get; set; }
}

public class ReportSection<T> : IReportSection
{
    public string ReportSectionName { get; set; }

    public ICollection<T> ReportItems { get; set; }

    ICollection IReportSection.ReportItems
    {
        get { return ReportItems as ICollection; }
        set { ReportItems = value as ICollection<T>; }
    }
}

然后我遍历这样的对象：

public ReportBase GetContribAuthorsReport
(
    ICollection<ProjectAffiliateViewModel> projectAffiliates, 
    ICollection<SubmissionAffiliateViewModel> submissionAffiliates
)
{
    //var caReport = new ContributingAffiliates("CSV", projectAffiliates, submissionAffiliates);
    var caReport = new ReportBase { ReportType = "CSV", ReportName = "Reviewers' Contact Information" };

    caReport.ReportSections.Add(new ReportSection<ProjectAffiliateViewModel> { ReportItems = projectAffiliates });
    caReport.ReportSections.Add(new ReportSection<SubmissionAffiliateViewModel> { ReportItems = submissionAffiliates });

    return caReport;//.Report;
}

这给了我现在所需要的东西。对不起，我一开始并不是那么清楚，谢谢你的帮助。

如何获取ReportItem的类型

2 个答案: