Question

我得到了这个例外：

AppName.exe中出现未处理的win32异常

仅当我绑定到ComboBox时才会发生这种情况这是我的XAML：

<ContentDialog x:Name="BrowseBySourceDialog"                                   
                                   Grid.Column="1"
                                   PrimaryButtonText="Accept" IsPrimaryButtonEnabled="False"          
                                   Opened="BrowseBySourceDialog_Opened">

                        <StackPanel  Background="White">
                                <Border Background="DarkGreen" MinHeight="40"
                                           MinWidth="300">
                                    <TextBlock Text="Browse: By Source"                     
                                                VerticalAlignment="Center"
                                                Foreground="White"        
                                                TextAlignment="Center"
                                                HorizontalAlignment="Center" />
                                </Border>
                            <StackPanel>

                                <ComboBox x:Name="BrowseBySourceComboBox" 
                                          PlaceholderText="Select Source"                      
                                          Height="40" 
                                          Width="300" 
                                          ItemsSource="{x:Bind BrowseBySourceList, Mode=OneWay}" 
                                          DisplayMemberPath="Source">
                                    <ComboBox.ItemTemplate>
                                        <DataTemplate x:DataType="local:FeaturedResponseItem">
                                            <TextBlock Text="{x:Bind key}"/>
                                        </DataTemplate>
                                    </ComboBox.ItemTemplate>

                                </ComboBox>
                            </StackPanel>
                        </StackPanel>
                    </ContentDialog>

仅当存在以下行时才会发生此异常：

<ComboBox.ItemTemplate>
     <DataTemplate x:DataType="local:FeaturedResponseItem">
           <TextBlock Text="{x:Bind key}"/>
      </DataTemplate>
  </ComboBox.ItemTemplate>

如果删除上面的行，组合框肯定是空的，但不会发生异常。绑定错了吗？

来源：

ObservableCollection<FeaturedResponseItem> BrowseBySourceList { get; set; } = new ObservableCollection<FeaturedResponseItem>();

型号：

public class FeaturedResponseItem
    {
        public string key { get; set; }
        public string icon { get; set; }
        public bool accessible { get; set; }
    }

Answer 1

您可以删除<TabControl> <TabItem Header="ERP"> <ContentControl Name="ccERP" Background="#FFE5E5E5" Content="{Binding DataContext.SelectedConnection.ERP.PluginInstance.UI, RelativeSource={RelativeSource AncestorType=Window}}"/> </TabItem> </TabControl>或只是将// readFile.js const fs = require('fs'); var readFile = function readFile(fileName){ return new Promise((resolve, reject)=>{ fs.readFile(fileName, {encoding: 'utf-8'}, (err, contents)=>{ if(err){ reject(err); } resolve(contents); }); }); }; module.exports.readFile = readFile; //play.js const {readFile} = require('./readFile'); var getText = function getTextFromFile(){ readFile('readMe.txt').then((contents)=>{ return contents; }).catch((err)=>{ console.log(err); }); }; module.exports.getText = getText; //someFile.js const {getText} = require('./play.js'); var result = getText(); console.log(result);全部删除，然后将DisplayMemberPath="Source"更改为ItemTemplate。

绑定到ComboBox时出现UWP异常

1 个答案: