无法选择wpf列表框项目 我正在创建一个发送API调用并将结果保存到数据库的应用程序。为了避免每次都回到API文档中,我创建了一个小应用程序来提醒我调用的基本元素。它的工作原理是将xml文档加载到内存中,并使用列表框选择适当的调用。然后它的元素显示在文本块(和文本框)中
文件“apicalls.xml”的结构如下所示:无法选择wpf列表框项目 我正在创建一个发送API调用并将结果保存到数据库的应用程序。为了避免每次都回到API文档中,我创建了一个小应用程序来提醒我调用的基本元素。它的工作原理是将xml文档加载到内存中,并使用列表框选择适当的调用。然后它的元素显示在文本块(和文本框)中,wpf,listboxitem,Wpf,Listboxitem,文件“apicalls.xml”的结构如下所示: <Calls> <Call> <Description>blah blah</Description> <api>POST /api/something/somethingElse/etc</api> <Accept>application/xml</Accept> <ContentType>applicat
<Calls>
<Call>
<Description>blah blah</Description>
<api>POST /api/something/somethingElse/etc</api>
<Accept>application/xml</Accept>
<ContentType>application/xml</ContentType>
<Parameters>id</Parameters>
<Method>POST</Method>
<ReceiveFile>true</ReceiveFile>
<Category>aCategory</Category>
</Call> </Calls>
废话
POST/api/something/somethingElse/etc
应用程序/xml
应用程序/xml
身份证件
邮递
真的
分类
有很多“呼叫”元素。因此,C代码如下所示:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Xml;
using System.Windows.Threading;
namespace ShowAPI
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public XmlDocument doc = new XmlDocument();
public MainWindow()
{
InitializeComponent();
doc.Load("apicalls.xml");
}
private void getAll(string name)
{
XmlNodeList nodeList = doc.DocumentElement.SelectNodes("Call");
int i = 0;
foreach (XmlNode node in nodeList)
{
XmlNode cat = node.SelectSingleNode("Category");
if (cat.InnerText == name)
{
ListBoxItem item = new ListBoxItem();
item.Content = (++i).ToString() + " " + node.SelectSingleNode("api").InnerText;
//item.Content = node.SelectSingleNode("api").InnerText;
item.Name = "N" + i.ToString();
list.Items.Add(item);
}
}
}
private void RadioButton_Checked(object sender, RoutedEventArgs e)
{
string name = (((RadioButton)sender).Content.ToString());
list.Items.Clear();
getAll(name);
dispatch(); // this is to display the items after the listbox has been populated
}
private void dispatch()
{
list.Dispatcher.Invoke(DispatcherPriority.Render, EmptyDelegate);
}
private static Action EmptyDelegate = delegate () { };
private void list_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (list.Items.Count == 0)
return;
int index = list.SelectedIndex;
object sel = e.AddedItems[0];
string s = sel.ToString();
XmlNodeList nodes = doc.DocumentElement.SelectNodes("Call");
IEnumerable<RadioButton> enumerable = panel.Children.OfType<RadioButton>();
Func<RadioButton, bool> func = (x) => x.IsChecked == true;
RadioButton res = enumerable.Single<RadioButton>(func);
string find = res.Content.ToString();
List<XmlNode> nodeList = new List<XmlNode>();
foreach (XmlNode xnode in nodes)
{
XmlNode api_node = xnode.SelectSingleNode(".//api");
XmlNode cat_node = xnode.SelectSingleNode(".//Category");
string s_api = api_node.InnerText;
string s_cat = cat_node.InnerText;
if (s_cat == find)
{
nodeList.Add(xnode);
}
}
XmlNode xxx = nodeList[index];
description.Text = xxx.SelectSingleNode(".//Description").InnerText;
api.Text = xxx.SelectSingleNode(".//api").InnerText.TrimStart(new char[] { 'G', 'E', ' ', 'T', 'L', 'U', 'P', 'S', 'O', 'D' });
accept.Text = xxx.SelectSingleNode(".//Accept").InnerText;
contentType.Text = xxx.SelectSingleNode(".//ContentType").InnerText;
method.Text = xxx.SelectSingleNode(".//Method").InnerText;
expectFile.Text = xxx.SelectSingleNode(".//ReceiveFile").InnerText;
parameters.Text = xxx.SelectSingleNode(".//Parameters").InnerText;
}
}
使用系统;
使用System.Collections.Generic;
使用System.Linq;
使用System.Windows;
使用System.Windows.Controls;
使用System.Xml;
使用System.Windows.Threading;
名称空间ShowAPI
{
///
///MainWindow.xaml的交互逻辑
///
公共部分类主窗口:窗口
{
public XmlDocument doc=新的XmlDocument();
公共主窗口()
{
初始化组件();
doc.Load(“apicalls.xml”);
}
私有void getAll(字符串名称)
{
XmlNodeList nodeList=doc.DocumentElement.SelectNodes(“调用”);
int i=0;
foreach(节点列表中的XmlNode节点)
{
XmlNode cat=node。选择SingleNode(“类别”);
如果(cat.InnerText==名称)
{
ListBoxItem=新建ListBoxItem();
item.Content=(++i.ToString()+“”+node.SelectSingleNode(“api”).InnerText;
//item.Content=node.SelectSingleNode(“api”).InnerText;
item.Name=“N”+i.ToString();
列表.项目.添加(项目);
}
}
}
已选中专用无效单选按钮(对象发送器,路由目标e)
{
字符串名称=(((RadioButton)sender.Content.ToString());
list.Items.Clear();
getAll(姓名);
dispatch();//这是在填充列表框后显示项目
}
私密
{
list.Dispatcher.Invoke(DispatcherPriority.Render,EmptyDelegate);
}
私有静态操作EmptyDelegate=delegate(){};
私有无效列表\u选择已更改(对象发送者,选择已更改已更改)
{
if(list.Items.Count==0)
返回;
int index=list.SelectedIndex;
对象sel=e.AddedItems[0];
字符串s=sel.ToString();
XmlNodeList nodes=doc.DocumentElement.SelectNodes(“调用”);
IEnumerable enumerable=panel.Children.OfType();
Func Func=(x)=>x.IsChecked==true;
RadioButton res=可枚举单(func);
字符串find=res.Content.ToString();
列表节点列表=新列表();
foreach(XmlNode中的xnode)
{
XmlNode api_node=xnode.SelectSingleNode(“.//api”);
XmlNode cat_node=xnode.SelectSingleNode(“.//类别”);
字符串s_api=api_node.InnerText;
字符串s_cat=cat_node.InnerText;
如果(s_cat==查找)
{
nodeList.Add(xnode);
}
}
XmlNode xxx=节点列表[索引];
description.Text=xxx.SelectSingleNode(“.//description”).InnerText;
api.Text=xxx.SelectSingleNode(“.//api”).InnerText.TrimStart(新字符[]{'G','E','T','L','U','P','S','O','D'});
accept.Text=xxx.SelectSingleNode(“.//accept”).InnerText;
contentType.Text=xxx.SelectSingleNode(“.//contentType”).InnerText;
method.Text=xxx.SelectSingleNode(“.//方法”).InnerText;
expectFile.Text=xxx.SelectSingleNode(“.//ReceiveFile”).InnerText;
parameters.Text=xxx.SelectSingleNode(“.//参数”).InnerText;
}
}
}
这是xaml中的ListBox实现:
<ListBox Name ="list" HorizontalAlignment="Left" Height="396" Margin="582,52,0,0" VerticalAlignment="Top" Width="561" SelectionChanged="list_SelectionChanged">
<ListBox.Background>
<RadialGradientBrush Center="0.1,0.5" GradientOrigin="2,1" RadiusX="1" RadiusY="0.3" SpreadMethod="Reflect">
<GradientStop Color="#FFC7431C" Offset="1"/>
<GradientStop Color="#FFD31010" Offset="0.494"/>
</RadialGradientBrush>
</ListBox.Background>
</ListBox>c
C
因此,列表框是正常填充的,我可以看到所有项目,但当我将鼠标移到它们上面时,任何超过12的项目都无法被选择(它们似乎不是交互式的-移动到项目上时背景不会改变)
我曾尝试将listboxitems作为对象而不是文本插入(我在某个地方读过),并通过在实际内容之前添加索引号和方法名来避免插入相同的项。似乎什么都不管用,我也不知道
另外,我还使用反射来获取properties(),并将第一个listboxitem的值与第十四个listboxitem的值进行比较,它们除了名称和内容之外是相同的。
我刚刚注意到用箭头键选择项目效果很好。鼠标选择在12日之后对任何项目都不起作用。我建议您根据WPF的核心功能(如
XmlDataProvider
和当前项目同步)使用稍微不同的方法。因此,首先在窗口资源中定义XmlDataProvider:
<Window.Resources>
<XmlDataProvider x:Key="CallsData">
<x:XData>
<Calls xmlns=''>
<Call>
<Description>blah blah 3</Description>
<api>POST /api/something</api>
<Accept>application/xml</Accept>
<ContentType>application/xml</ContentType>
<Parameters>id</Parameters>
<Method>POST</Method>
<ReceiveFile>true</ReceiveFile>
<Category>Cat1</Category>
</Call>
<Call>
<Description>blah blah 2</Description>
<api>POST /api/something/somethingElse</api>
<Accept>application/xml</Accept>
<ContentType>application/xml</ContentType>
<Parameters>id</Parameters>
<Method>POST</Method>
<ReceiveFile>true</ReceiveFile>
<Category>Cat3</Category>
</Call>
<Call>
<Description>blah blah 3</Description>
<api>POST /api/something/somethingElse/etc</api>
<Accept>application/xml</Accept>
<ContentType>application/xml</ContentType>
<Parameters>id</Parameters>
<Method>POST</Method>
<ReceiveFile>true</ReceiveFile>
<Category>Cat2</Category>
</Call>
</Calls>
</x:XData>
</XmlDataProvider>
</Window.Resources>
胡说八道
POST/api/something
应用程序/xml
应用程序/xml
身份证件
邮递
真的
第一类
废话
POST/api/某物/某物
应用程序/xml
应用程序/xml
身份证件
邮递
真的
第三类
胡说八道
POST/api/something/somethingElse/etc
应用程序/xml
应用程序/xml
身份证件
邮递
真的
第二类
<DockPanel LastChildFill="True"
DataContext="{Binding Source={StaticResource CallsData}, XPath=/Calls/Call}">
<StackPanel DockPanel.Dock="Bottom">
<TextBlock Text="{Binding XPath=Description, StringFormat='Description = {0}'}"/>
<TextBlock Text="{Binding XPath=api, StringFormat='api = {0}'}"/>
<TextBlock Text="{Binding XPath=Accept, StringFormat='Accept = {0}'}"/>
<TextBlock Text="{Binding XPath=ContentType, StringFormat='ContentType = {0}'}"/>
<TextBlock Text="{Binding XPath=Parameters, StringFormat='Parameters = {0}'}"/>
<TextBlock Text="{Binding XPath=Method, StringFormat='Method = {0}'}"/>
<TextBlock Text="{Binding XPath=ReceiveFile, StringFormat='ReceiveFile = {0}'}"/>
<TextBlock Text="{Binding XPath=Category, StringFormat='Category = {0}'}"/>
</StackPanel>
<ListBox Name="list"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding}">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding XPath=Category}"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DockPanel>