小编Bre*_*ett的帖子

我有一个课程如下:

Class Scan
    Delivered As Boolean
    ScanDate As Date
    State As String
    Facility As String  
End Class

然后我创建一个列表并用包含任何内容的扫描填充它.

Dim Scans As New List(Of Scan) 

我需要挖掘清单以获取各种信息.我想用LINQ来做.问题是,对于我的生活,我只是没有得到它.语法将我抛弃,结果不是强类型的事实会让我失望,并且Web上的示例过于简单或过于复杂.

我怎么能

1. 获取扫描计数,按日期分配Delivered = True
2. 获取扫描计数,按设施分组,其中Delivered = True
3. 获取扫描计数,按状态分组,其中Delivered = True

然后我想在For Each循环中使用它.

For Each result In GroupedResults
    ‘My Code

Next

理想情况下,我希望结果是强类型的.这可能吗？

任何人都可以推荐一些链接来开始这个？我遇到的每个网站都让我头脑发热.我根本不理解它.

编辑:

十分感谢大家.我仍然对这些东西感到头疼,但至少这是一个真实世界的例子,我可以用它来了解发生了什么.

我希望这个简单的例子可以帮助我进入一个更复杂的用途 - 没有运气.我本来应该这样做了.

所有示例似乎都使用键/值响应.如果我需要分组两个值,该怎么办？

    Class Scan
        Delivered As Boolean
        Scanned As Boolean
        ScanDate As Date
        State As String
        Facility As String  
    End Class


1. Get a count of Delivered = True, …

我正在构建一个Web服务来接受公司的通知。该公司通知我该服务的结构不正确，并向我提供了可运行的Web服务的.asmx。看起来像这样：

请求：

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:xsd="http://www.w3.org/2001/XMLSchema"
       xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <AuthenticationInfo
           xmlns="http://www.usps.com/postalone/services/UserAuthenticationSchema">
      <UserId xmlns="">string</UserId>
      <UserPassword xmlns="">string</UserPassword>
    </AuthenticationInfo>
    <fullServiceAddressCorrectionNotification
            xmlns="http://www.usps.com/postalone/services/POCustomerMailXMLServices">string</fullServiceAddressCorrectionNotification>
  </soap12:Body>
</soap12:Envelope>

响应：

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:xsd="http://www.w3.org/2001/XMLSchema"
       xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <FullServiceNixieDetailNotificationResponse
         xmlns="http://idealliance.org/maildat/Specs/md091/mailxml70C/mailxml">
      <FullServiceNixieDetailNotificationResult>string</FullServiceNixieDetailNotificationResult>
    </FullServiceNixieDetailNotificationResponse>
  </soap12:Body>
</soap12:Envelope>

我的看起来像这样：请求：

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:xsd="http://www.w3.org/2001/XMLSchema"
       xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <FullServiceNixieDetailNotification
          xmlns="http://idealliance.org/maildat/Specs/md091/mailxml70C/mailxml">
      <AuthenticationInfo>
        <UserID>string</UserID>
        <Password>string</Password>
      </AuthenticationInfo>
      <fullServiceAddressCorrectionNotification>string</fullServiceAddressCorrectionNotification>
    </FullServiceNixieDetailNotification>
  </soap12:Body>
</soap12:Envelope>

响应：

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:xsd="http://www.w3.org/2001/XMLSchema"
       xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <notificationResponse
       xmlns="http://www.usps.com/postalone/services/POCustomerMailXMLServices">string</notificationResponse>
  </soap12:Body>
</soap12:Envelope>

如您所见，我的东西包裹在一个我需要摆脱的额外元素中。Unfortunatley，我不确定如何执行此操作。我的Web服务代码如下：

Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel
Imports System.Data.SqlClient

Public Structure AuthenticationInfoType …