小编Mat*_*uwe的帖子

我有一个ContentTemplate自定义控件来显示子控件.数据上下文没有通过我的DataTemplate,因此当我绑定我的子控件时,我无法检索该值.我很确定我没有特别针对DataTemplate实现这一点,所以我将不胜感激任何帮助.我已经把问题分解成尽可能小的情况.

一,页面:

<Window x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1"
Title="MainWindow" Height="350" Width="525">

<Window.Resources>
    <ResourceDictionary>
        <local:MainWindowViewModel x:Key="ViewModel" />
    </ResourceDictionary>
</Window.Resources>

<Grid DataContext="{StaticResource ViewModel}">
    <local:MyControl>
        <local:MyControl.MainContent>
            <DataTemplate>
                <TextBlock Text="{Binding TextValue}" />
            </DataTemplate>
        </local:MyControl.MainContent>
    </local:MyControl>
</Grid>

接下来,ViewModel:

Public Class MainWindowViewModel
    Implements INotifyPropertyChanged

    Public Event PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged

    Private _textValue As String
    Public Property TextValue() As String
        Get
            If String.IsNullOrEmpty(_textValue) Then
                _textValue = "A default value"
            End If

            Return _textValue
        End Get
        Set(ByVal value As String)
            _textValue = value …

我有一个SQL数据库,里面有几百个表,但我只需要处理几个.有没有办法在SQL Server Management Studio 2008中隐藏大部分表格？另一种选择是创建某种只能引用我感兴趣的表的分组.过滤表有效,但是我无法添加OR逻辑运算符来包含多个条件.

谢谢,马特

我正在使用IListBlobItems列表CloudBlobContainer.ListBlobs.然后我使用以下代码循环遍历每个条目以显示blob的大小:

        foreach (IListBlobItem item in blobs)
        {
            if (item.GetType() == typeof(CloudBlobDirectory))
            { }
            else if (item.GetType() == typeof(CloudBlockBlob))
            {
                CloudBlockBlob blockBlob = (CloudBlockBlob)item;
                IEnumerable<ListBlockItem> blocks = blockBlob.DownloadBlockList(new BlobRequestOptions { BlobListingDetails = BlobListingDetails.All });
                Console.WriteLine(blockBlob.Name.PadRight(50, ' ') + 
                   blocks.Sum(b => b.Size));
            }
            else
            {
                Console.WriteLine(item.Uri.LocalPath);
            }

        }

但是,当我检查变量的计数时blocks,它始终为0.为什么？

我正在尝试了解Azure Service Bus上的重试策略，但是它没有按我期望的方式工作。我有以下代码，它们既侦听消息，又将消息发送到特定的天蓝色队列。

using System;
using Microsoft.ServiceBus;
using Microsoft.ServiceBus.Messaging;

namespace ServiceBusTester
{
    class Program
    {
        static void Main(string[] args)
        {
            var connectionString = "Endpoint=sb://<NamespaceName>.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=<SharedAccessKey>";
            var queueName = "MyTestQueue";

            var retryPolicy = new RetryExponential(TimeSpan.FromSeconds(0), TimeSpan.FromSeconds(30), 15);

            var ns = NamespaceManager.CreateFromConnectionString(connectionString);
            ns.Settings.RetryPolicy = retryPolicy;

            if (!ns.QueueExists(queueName))
                ns.CreateQueue(queueName);

            var mf = MessagingFactory.CreateFromConnectionString(connectionString);
            mf.RetryPolicy = retryPolicy;

            var mr = mf.CreateMessageReceiver(queueName);
            mr.RetryPolicy = retryPolicy;

            var retryCount = 0;

            mr.OnMessage(_ =>
            {
                retryCount++;
                Console.WriteLine($"{retryCount.ToString().PadLeft(4, ' ')} - Message Received: {_.GetBody<string>()}");
                _.Abandon();
            }, new OnMessageOptions() { AutoComplete …