小编adv*_*api的帖子

我想以编程方式使用 ColorAnimation 来为单元格设置动画，但是我在执行时得到了这个 storyboard.Begin()

'System.Windows.Media.Animation.ColorAnimation' animation object cannot be used to animate property 'Background' because it is of incompatible type 'System.Windows.Media.Brush'.

我已经定义了我ColorAnimation的

var storyBoard = new  Storyboard();
ColorAnimation colorAnimation = new ColorAnimation
{
    From = Colors.Red,
    To = Colors.CornflowerBlue,
    Duration = TimeSpan.FromSeconds(1),
    FillBehavior = FillBehavior.Stop
};

和它的用法我做

if (column.UniqueName != "_ID")
{
    var animation = animationMapping[column.UniqueName].Animation;
    var storyboard = animationMapping[column.UniqueName].Storyboard;

    Storyboard.SetTarget(animation, cell.Content as TextBlock);
    //Storyboard.SetTargetProperty(animation,
    //    new PropertyPath((TextBlock.Foreground).Color"));

    PropertyPath colorTargetPath = new PropertyPath(TextBlock.BackgroundProperty);
    Storyboard.SetTargetProperty(animation, colorTargetPath);

    storyboard.Begin();
}

我必须将什么参数传递给新的 …

我想知道是否有一种方法可以避免获取所有缓冲区，然后使用 HttpClient 和 File.WriteAllBytes 将它们写入文件。

这是我使用的代码片段

public async Task<byte[]> DownloadAsByteArray(string filename)
{
    _logger.LogDebug($"Start downloading {filename} file at {DateTime.Now}");
    
    var result = await _httpClient.GetByteArrayAsync(filename);
    
    return result;
}

var bytes = await _downloadFileService.DownloadAsByteArray(fileDownload);

await File.WriteAllBytesAsync(fullFlePathName, bytes);

对于相当大的文件，应用程序内存增长得非常快。

在使用caliburn micro和telerik控件制作的wpf应用程序中,我有不同的屏幕,从远程服务加载数据,然后在gridview /填充组合框中显示数据.我正在使用sync/await运算符来进行负载检索操作,但我几乎可以肯定它有一些瓶颈.等待我有主UI线程等待与工作线程同步...考虑这个示例

Public class MyViewModel:Screen
{
  [omiss]

Public bool IsBusy {get;set;}  
 Public list<Foo> DropDownItems1 {get;set;}
Public  list<Foo2> DropDownItems2 {get;set;}

  Public async Void Load()
  {
    IsBusy =true;
     DropDownItems1 = await repository.LoadStates();
     DropDownItems2 = await repository.LoadInstitutes();
     IsBusy = false;
  }

}

在那种情况下,我首先加载任务然后加载第二个没有并行性...我该如何优化它？关于我的IsBusy属性,它通过约定绑定到繁忙指示器,如何正确设置？谢谢

更新#1:

我是真正的代码

public async Task InitCacheDataTables()
    {
        var taskPortolio = GetPortfolio();
        var taskInstitutes = GetInstitutes();
        var taskStatus = GetStatus();
        var taskCounterparts = GetCounterparts();
        var taskCrosses = GetCrosses();
        var taskCurrencies = GetCurrencies();
        var taskSigns = GetSigns();

        await TaskEx.WhenAll(new[] { taskPortolio, …

我RabbitMq用来处理我在公共汽车上收到的消息。我想知道是否有更好的方法来处理我收到的消息（也许使用async/await模式）

这是我的代码片段

connection = connectionFactory.CreateConnection();

channel = connection.CreateModel();

channel.QueueDeclare(queue: Constants.RabbitListeningQueue,durable: false,exclusive: false,autoDelete: false,arguments: null);
channel.QueueDeclare(queue: Constants.RabbitMqRequestInsertedQueue,durable: false,exclusive: false,autoDelete: false,arguments: null);

var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
    log.Debug($"[x] Received message :{ea}");
    var body = ea.Body;
    var message = Encoding.UTF8.GetString(body);

    var dynamicObject = JObject.Parse(message);

    queueMessageHandler.HandleMessage(dynamicObject);
};

将queueMessageHandler实现如下

public class QueueMessageHandler : IQueueMessageHandler
{
    private readonly IImportNucleoManager importNucleoManager;

    public QueueMessageHandler(IImportNucleoManager importNucleoManager)
    {
        this.importNucleoManager = importNucleoManager;
    }

    public void HandleMessage(dynamic message)
    {
        switch …

我使用最新的 IBM amqmdnet.dll 程序集 9.1.3 开发了一个库

当我运行 .NET Core 控制台应用程序 (2.2) 时，出现以下异常

TypeLoadException: Could not load type 'System.Web.Configuration.WebConfigurationManager' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

我用 dotPeek 反汇编了文件，它引用了 System.Web

站在文档上，它支持 .NET Core。我创建的程序集是一个标准的 .NET 类库，当被 .NET Full Framework 控制台应用程序引用时，它可以工作。

有什么建议吗？谢谢

在mvc应用程序中,我有一个由以下结构组成的菜单

public class MenuItem
{
    public string Action {get;set;}
    public string Controller {get;set;}
    public string Text {get;set;}
    public List<MenuItem> Children {get;set;}
}

考虑一个简单的compisition

Root
\-Item1
\-Item2
  \-Item2_1
  \-Item2_2
    \-Item_2_2_1
    \-Item_2_2_2
\-Item3

我想获取项目Item_2_2_2(认为它有Action ="Index",Controller ="ABC")

我如何编写一个函数(或更好的T的扩展方法)来迭代收集并获得与该条件匹配的项目？

谢谢

有没有办法可以跟踪通过Simple Injector和Constructor的IoC解析实例需要多长时间？

我的意思是跟踪级别的东西

谢谢

我正在尝试将字典转换为字符串结尾,然后将其转换为Base64,以便将其保存到另一个字符串.

这是我的代码

public class StringBase64Helper
{
    public static string Base64Encode(string plainText)
    {
        var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
        return Convert.ToBase64String(plainTextBytes, Base64FormattingOptions.InsertLineBreaks);
    }

    public static string Base64Decode(string base64EncodedData)
    {
        var base64EncodedBytes = Convert.FromBase64String(base64EncodedData);
        return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);
    }
}

我使用servicestack来序列化它

var dictionary = new Dictionary<string,object>();

dictionary.Add("VM","XX.XXXXXXXXX.Client.WPF.ViewModels.PortfolioManager");

var rr =ServiceStack.Text.JsonSerializer.SerializeToString(dictionary);

var str = StringBase64Helper.Base64Encode(rr);

输出我是

eyJWTSI6IlhYLlhYWFhYWFhYWC5DbGllbnQuV1BGLlZpZXdNb2RlbHMuUG9ydGZvbGlvTWFuYWdl
ciJ9

请注意,c1J9是一个新行,因为它在将字符串存储在我的主文件中时放置了字符.

来自Serializer的json是"{"VM":"XX.XXXXXXXXX.Client.WPF.ViewModels.PortfolioManager"}"

当我解码我得到的字符串

{"VM":"XX.XXXXXXXXX.Client.WPF.ViewModels.PortfolioManage

在我获得新线之后

r"}

我究竟做错了什么？

I'm quite new to .NET Core application, and I was wondering if there's a simple way to deploy the right application.json based on the profile. In .NET Standard application it was quite simple since we have web.config transformation/Slowcheeta but It doesn't seems to work with .NET Core Console app.

I've also read online that with ASP.NET Core application, we can use

var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true) <--this
.AddEnvironmentVariables();
Configuration = …

我过去使用RabbitMq作为MessageQueue，在收到消息时触发事件真的很简单。

我查看了IBM安装程序随附的.NET源，但是发现一种不好的方法来处理它。查看示例SimpleSubscribe可以完成这样的工作

// getting messages continuously
for (int i = 1; i <= numberOfMsgs; i++)
{
    // creating a message object
    message = new MQMessage();

    try
    {
        topic.Get(message);
        Console.WriteLine("Message " + i + " got = " + message.ReadString(message.MessageLength));
        message.ClearMessage();
    }
    catch (MQException mqe)
    {
        if (mqe.ReasonCode == 2033)
        {
            ++time;
            --i;
            Console.WriteLine("No message available");
            Thread.Sleep(1000);
            //waiting for 10sec
            if (time > 10)
            {
                Console.WriteLine("Timeout : No message available");
                break;
            }
            continue;
        }
        else
        {
            Console.WriteLine("MQException caught: {0} - {1}", …

我已将旧代码部分从 EF 移至 linq2db，当我必须添加一个具有内部元素引用的标识的新项目时，我必须执行以下代码

     if (axAnag == null)
     {
                    axAnag = new DataModels.AX();
                    var idAnag= context.InsertWithInt32Identity(axAnag);

                    axAnag.IdAnagrafica = idAnag;
     }

和下面的代码

        fk.AxAnagraficaAssicurati = axAnag;
        fk.StatusProtocollo = statusProtocollo;
        fk.DataEsclusione = newAnagrafica.DataEsclusione ?? condizione.DataAnnullamento;
        fk.DataInclusione = newAnagrafica.DataInclusione;
        fk.DerogaEta = newAnagrafica.DerogaEta;
        fk.ProgrCategoria = condizione.ProgessivoCategoria;
        fk.IdCondizione = condizione.Id;
        fk.IdCategoria = condizione.IdCategoria;
        fk.DataOperazioneInclusione = DateTime.Now;
        fk.HYPER = newAnagrafica.HyperService;
        //GPA ticket  2017-0017962
        fk.LimiteEtaSuperato = newAnagrafica.IsLimiteEtaSuperato;
        //GPA cr24
        fk.FlagConteggioRegolazionePremio = newAnagrafica.FlagConteggioRegolazionePremio;
        fk.IdAnagrafica = axAnag.IdAnagrafica;

我不太清楚的是为什么我必须添加 id 和整个引用的项目？

fk.AxAnagraficaAssicurati = axAnag;
fk.IdAnagrafica = axAnag.IdAnagrafica;

在脚手架模型中，我

    [Association(ThisKey = "IdAnagrafica", …

我有一个应用程序，其中有很多通过 DI 注册的服务，我想知道是否有以这种方式注册的最佳方法

      services.AddScoped<IDestinationService, DestinationService>();
        services.AddScoped<IAttractionService, AttractionService>();
        services.AddScoped<ICartService, CartService>();
        services.AddScoped<IPersonalService, PersonalService>();
        services.AddScoped<IUserService, UserService>();
        services.AddScoped<IEncryptionHelper, EncryptionHelper>();
        services.AddScoped<IAddressService, AddressService>();
        services.AddScoped<IUserRegistrationService, UserRegistrationService>();
        services.AddScoped<IUserRoleService, UserRoleService>();
        services.AddScoped<IEmailSender, EmailSender>();
        services.AddScoped<IUserRolesService, UserRolesService>();
        services.AddScoped<IProductAvailabilityService, ProductAvailabilityService>();

我想过创建一个属性并将其放入类中，但我不知道这是否是一个好的做法..有什么建议吗？

我有一个引用网络标准应用程序的奇怪问题(FW Full 4.5.2)

我收到此错误targets 'netstandard2.0'. It cannot be referenced by a project that targets '.NETFramework,Version=v4.5.2'.,是不是.NET标准应该允许来自Core和Framework项目的引用？