VB.NET：在 Linq 中填充列表

发布于 2024-09-15 00:51:26 字数 960 浏览 6 评论 0原文

假设我有以下 XML 文件：

<Movies>
     <Movie ownerName="Ryan">
          <Title>The Lord of the Rings Trilogy</Title>
          <Title>Saving Private Ryan</Title>
          <Title>etc</Title>
     </Movie>
     <Movie ownerName="Rynina">
          <Title>Foo</Title>
          <Title>Bar</Title>
     </Movie>
</Movies>

我需要使用 Linq to Xml 来检索 MovieCollection 类型的类。 MovieCollection 有两个属性，OwnerName (String) 和 Movies (List(Of String))。

一般来说，我会这样做：

From entry in movies...<Movie>_
Select New MovieCollection With { _
.OwnerName = [email protected], _
.MovieCollection = entry.<Title>.Value}

但是在这种情况下，这显然行不通。无论如何，是否可以使用 Linq 使用该所有者发生的所有电影来填充 MovieCollection 列表？

原文

Assume I have the following XML file:

<Movies>
     <Movie ownerName="Ryan">
          <Title>The Lord of the Rings Trilogy</Title>
          <Title>Saving Private Ryan</Title>
          <Title>etc</Title>
     </Movie>
     <Movie ownerName="Rynina">
          <Title>Foo</Title>
          <Title>Bar</Title>
     </Movie>
</Movies>

What I'm after is using Linq to Xml to retrieve classes of type MovieCollection. MovieCollection has two properties, OwnerName (String) and Movies (List(Of String)).

Generally, I'd do something like:

From entry in movies...<Movie>_
Select New MovieCollection With { _
.OwnerName = [email protected], _
.MovieCollection = entry.<Title>.Value}

However in this case this obviously wont work. Is there anyway to fill the MovieCollection list with all the movies that occur for that owner using Linq?

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戈亓 2024-09-22 00:51:26

您确实应该将标签命名为 Movie MovieCollection 和 Title Movie。

使用以下命令解析您的 XML：

Dim doc = XDocument.Parse("<xml>")

或

Dim doc = XDocument.Load("path")

并使用：

Dim movieCollections = From movieCol In doc.Root.Elements("Movie")
                       Select New MovieCollection() With
                              {
                                    .OwnerName = movieCol.Attribute("ownerName"),
                                    .Movies = movieCol.Elements("Title")
                                                      .Select(Function(m) m.Value)
                                                      .ToList()
                              }

You should really name the tags Movie MovieCollection and Title Movie.

Parse your XML with:

Dim doc = XDocument.Parse("<xml>")

Dim doc = XDocument.Load("path")

and use this:

Dim movieCollections = From movieCol In doc.Root.Elements("Movie")
                       Select New MovieCollection() With
                              {
                                    .OwnerName = movieCol.Attribute("ownerName"),
                                    .Movies = movieCol.Elements("Title")
                                                      .Select(Function(m) m.Value)
                                                      .ToList()
                              }

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