如何使用LINQ to XML将XML数据绑定到用户控件 [英] How do I bind XML data to a user control with LINQ to XML

问题描述

我正在构建一个UserContorl库。 XAML由一个组合框和几个文本框组成。 < note：i =have =this =code =working =with =but =wanted =to =streamline =it =linq = xml =xmlns：note =＃unknown>



我有一个外部XML文档，其中包含客户，地址，电话号码，联系人列表名称和电子邮件地址。



我想导入XML文档以填充名为cbxName的ComboBox，其中包含每个名称字段的内容在XML中。 当在下拉列表中更改选择时，我希望其他文本框绑定到相同的数据并反映更改。



我还会有一个按钮来保存对表单中数据所做的任何更改。



XML结构：

I have a UserContorl library that I am building. The XAML consists of a combobox and several textboxes. <note: i="" have="" this="" code="" working="" with="" but="" wanted="" to="" streamline="" it="" linq="" xml="" xmlns:note="#unknown">

I have an external XML document with a list of customers, addresses, phone numbers, contact names, and email addresses.

I want to import the XML document to populate the ComboBox called cbxName, with the contents of each Name field in the XML. When the selection is changed in the dropdown, I want the other textboxes bound to the same data and reflect the changes.

I will also have a button to save any changes made to the data in the form.

XML Structure:

<?xml version="1.0" encoding="utf-8"?>
<CustDB xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Customer>
    <Name></Name>
    <Address1></Address1>
    <Address2></Address2>
    <Phone></Phone>
    <Fax></Fax>
    <Cell></Cell>
    <Other></Other>
    <Attn></Attn>
    <Email></Email>
    <SalesPerson></SalesPerson>
  </Customer>
</CustDB>

我现在的VB看起来像这样......

My current VB looks like this...

Imports c = Corel.Interop.VGCore
Imports System
Imports System.Xml
Imports System.Linq

Public Class Docker
    Dim WithEvents appDRAW As c.Application

    Public Sub New(app As Object)
        InitializeComponent()
        appDRAW = CType(app, c.Application)
        Dim contacts As XDocument = XDocument.Load("c:\users\sean\documents\custdbTesting.xml")

    End Sub
End Class

我的XAML看起来像这样...

My XAML looks like this...

<UserControl x:Class="Docker"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" d:DesignWidth="250" FontSize="10">
    <UserControl.Resources>
        <Style x:Key="labelStyle" TargetType="{x:Type Label}">
            <Setter Property="VerticalAlignment" Value="Top"/>
            <Setter Property="HorizontalAlignment" Value="Left"/>
        </Style>

        <Style x:Key="textboxStyle" TargetType="{x:Type TextBox}">
            <Setter Property="VerticalAlignment" Value="Top"/>
            <Setter Property="HorizontalAlignment" Value="Right"/>
            <Setter Property="Height" Value="23"/>
            <Setter Property="Width" Value="175"/>
        </Style>

        <Style x:Key="checkboxStyle" TargetType="{x:Type CheckBox}">
            <Setter Property="VerticalAlignment" Value="Top"/>
            <Setter Property="HorizontalAlignment" Value="Left"/>
        </Style>

        <Style x:Key="comboboxStyle" TargetType="{x:Type ComboBox}">
            <Setter Property="VerticalAlignment" Value="Top"/>
            <Setter Property="HorizontalAlignment" Value="Right"/>
            <Setter Property="Height" Value="23"/>
            <Setter Property="Width" Value="175"/>
            <Setter Property="IsEditable" Value="True"/>
        </Style>
    </UserControl.Resources>
    <StackPanel>
        <Grid Margin="5">
            <Label Style="{StaticResource labelStyle}" Content="Name"/>
            <ComboBox x:Name="cbxName" Style="{StaticResource comboboxStyle}"/>
            <Label Style="{StaticResource labelStyle}" Content="Address" Margin="0,23,0,0"/>
            <TextBox x:Name="txbAdd1" Style="{StaticResource textboxStyle}" Margin="0,23,0,0" TextChanged="TextBox_TextChanged"/>
            <TextBox x:Name="txbAdd2" Style="{StaticResource textboxStyle}" Margin="0,46,0,0"/>
            <Label Style="{StaticResource labelStyle}" Content="Phone" Margin="0,69,0,0"/>
            <TextBox x:Name="txbPhone" Style="{StaticResource textboxStyle}" Margin="0,69,0,0"/>
            <Label Style="{StaticResource labelStyle}" Content="Fax" Margin="0,92,0,0"/>
            <TextBox x:Name="txbFax" Style="{StaticResource textboxStyle}" Margin="0,92,0,0"/>
            <Label Style="{StaticResource labelStyle}" Content="Cell" Margin="0,115,0,0"/>
            <TextBox x:Name="txbCell" Style="{StaticResource textboxStyle}" Margin="0,115,0,0"/>
            <Label Style="{StaticResource labelStyle}" Content="Other" Margin="0,138,0,0"/>
            <TextBox x:Name="txbOther" Style="{StaticResource textboxStyle}" Margin="0,138,0,0"/>
            <Label Style="{StaticResource labelStyle}" Content="Attn" Margin="0,161,0,0"/>
            <TextBox x:Name="txbAttn" Style="{StaticResource textboxStyle}" Margin="0,161,0,0"/>
            <Label Style="{StaticResource labelStyle}" Content="Email" Margin="0,184,0,0"/>
            <TextBox x:Name="txbEmail" Style="{StaticResource textboxStyle}" Margin="0,184,0,0"/>
            <Label Style="{StaticResource labelStyle}" Content="Sales Rep" Margin="0,207,0,0"/>
            <ComboBox x:Name="cbxSales" Style="{StaticResource comboboxStyle}" Margin="0,207,0,0"/>
            <Button Content="Save Data" Height="23" Width="100" Margin="70,235,70,0"/>
        </Grid>
    </StackPanel>
</UserControl>

推荐答案

我不确定你有什么问题。然而......



看看例子：

I'm not sure what kind of issue do you have. Nevertheless...

Have a look at example:

XElement contacts =
    new XElement("Contacts",
        new XElement("Contact",
            new XElement("Name", "Patrick Hines"),
            new XElement("Phone", "206-555-0144",
                new XAttribute("Type", "Home")),
            new XElement("Phone", "425-555-0145",
                new XAttribute("Type", "Work")),
            new XElement("Address",
                new XElement("Street1", "123 Main St"),
                new XElement("City", "Mercer Island"),
                new XElement("State", "WA"),
                new XElement("Postal", "68042"))
        ),
        new XElement("Contact",
            new XElement("Name", "Anna Hives"),
            new XElement("Phone", "206-556-0145",
                new XAttribute("Type", "Home")),
            new XElement("Phone", "425-556-0146",
                new XAttribute("Type", "Work")),
            new XElement("Address",
                new XElement("Street1", "124 Main St"),
                new XElement("City", "Mercer Island"),
                new XElement("State", "WA"),
                new XElement("Postal", "68042"))
        )
    );

var qry = from c in contacts.Elements("Contact").Elements("Name")
    select c.Value;

foreach(string n in qry)
{
    Console.WriteLine("Name='{0}'", n);
}

结果：

Result:

Name='Patrick Hines'
Name='Anna Hives'

欲了解更多信息：带示例的LINQ to XML教程 [ ^ ]





这是 VB.NET 实施：

For further information: LINQ To XML Tutorials with Examples[^]


Here is VB.NET implementation:

Dim sFileName As String = "D:\custdbTesting.xml"
Dim contacts As XDocument = XDocument.Load(sFileName)

Dim qry As IEnumerable = From c In contacts.Elements("CustDB").Elements("Customer").Elements("Name") _
	Order By c.Value Ascending
	Select c.Value

For Each n in qry
	Console.WriteLine("Name='{0}'", n)
Next

结果：

Result:

Name='A'
...
Name='Z'

[/ EDIT]

[/EDIT]

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