wpf 我正在创建一个检查管理项目，尝试保存当前被单击的单选按钮，并在移动到另一个问题时清除

uidvcgyl  于 2023-04-13  发布在  其他
关注(0)|答案(1)|浏览(79)

我是新的wpf C#和我试图通过创建我的第一个项目来学习，我得到了问题在堆栈面板，当我点击一个问题，它显示了我的问题和4个答案作为单选按钮和我试图保存当前的单选按钮被点击的答案，当我点击另一个问题，所有的单选按钮被清除，所以在我的代码中，当我点击另一个问题时，所有的单选按钮都被清除，但是当我回到已经回答的问题时，所有的单选按钮都被清除，而没有保存，这是我的C#代码：

using final_project.Models;
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.DirectoryServices.ActiveDirectory;
using System.Linq;
using System.Runtime.ExceptionServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Windows.Threading;
using System.Xml.Linq;
using static System.Net.Mime.MediaTypeNames;

namespace final_project.View
{
    /// <summary>
    /// Interaction logic for StudentExamWindow.xaml
    /// </summary>
    public partial class StudentExamWindow : Window
    {
        
        private int CurrentQuestion;
        private int Grade = 0;
        List<int> qgrades = Enumerable.Repeat(0, 10).ToList();
        Exam exam1 = new Exam();
        List<Answer> answer1 = new List<Answer>();
        Question que = new Question();
        List<RadioButton> radioBoxes = new List<RadioButton>();
        List<Button> buttons = new List<Button>();
        DispatcherTimer dispatcherTimer;
        TimeSpan time;

        public StudentExamWindow()
        {
            InitializeComponent();
            time = TimeSpan.FromHours(1);
            dispatcherTimer = new DispatcherTimer();
            dispatcherTimer.Interval = TimeSpan.FromSeconds(1);
            dispatcherTimer.Tick += DispatcherTimer_Tick;
            dispatcherTimer.Start();
            exam1.Id = "1234";
            exam1.Name = "math";
            exam1.ExamDate = DateTime.Now;
            exam1.Questions = new List<Question>();
            answer1.Add(new Answer { Id = "1", Content = "12" });
            answer1.Add(new Answer { Id = "2", Content = "16" });
            answer1.Add(new Answer { Id = "3", Content = "17" });
            answer1.Add(new Answer { Id = "4", Content = "18" });
            answer1.Add(new Answer { Id = "1", Content = "50" });
            answer1.Add(new Answer { Id = "2", Content = "60" });
            answer1.Add(new Answer { Id = "3", Content = "70" });
            answer1.Add(new Answer { Id = "4", Content = "80" });
            answer1.Add(new Answer { Id = "1", Content = "50" });
            answer1.Add(new Answer { Id = "2", Content = "60" });
            answer1.Add(new Answer { Id = "3", Content = "70" });
            answer1.Add(new Answer { Id = "4", Content = "80" });
            addquestions(exam1.Questions);
        }

        //Add question
        private void addquestions(List<Question> questoins)
        {
            Question q = new Question();
            Question q2 = new Question();
            Question q3 = new Question();
            q.Id = "Q1";
            q.Name = "what 4 * 4 ? ";
            q.Grade = "10";
            q.Answers = answer1;
            q.CorrectAnswerId = "second";
            questoins.Add(q);
            q2.Id = "Q2";
            q2.Name = "what 4*79 ? ";
            q2.Grade = "10";
            q2.Answers = answer1;
            q2.CorrectAnswerId = "third";
            questoins.Add(q2);
            q3.Id = "Q3";
            q3.Name = "what 8*7 ? ";
            q3.Grade = "10";
            q3.Answers = answer1;
            q3.CorrectAnswerId = "forth";
            questoins.Add(q3);
            AddQuestionPannel(questoins);
           for(int i=0; i < buttons.Count; i++) 
            {
                buttons[i].Name = "Q" + (i + 1).ToString();
            }

        }

      //add Question pannel
        private void AddQuestionPannel(List<Question> q)
        {
             foreach(Question rs in q)
            {
                int i = 0;
                Button QB= new Button();
                QB.Content = rs.Name;
                QB.Background = Brushes.White;
                QuestionPannel.Children.Add(QB);
                QB.Click += new RoutedEventHandler(ShowQuestion_Click);
                i++;
                buttons.Add(QB);

            }
        }
        //show the Question on the front of the page
        private void ShowQuestion(string name,int index)
        {
            int i = index - 1;
            int imul = i * 4;
            radioBoxes.Clear();
            Txtblock.Text = name;
            Exercise.Text = buttons[i].Content.ToString();
            first.Content = answer1[imul].Content;
            second.Content = answer1[imul+1].Content;
            third.Content = answer1[imul+2].Content;
            forth.Content = answer1[imul+3].Content;
            radioBoxes.Add(first); radioBoxes.Add(second); 
            radioBoxes.Add(third); radioBoxes.Add(forth);
        }

        private void AddGrade()
        {
            TextBlock gradeBlock= new TextBlock();
            gradeBlock.Text = Grade.ToString();
            CheckboxList.Children.Add(gradeBlock);
        }
        private bool CheckAnswer(string c,string correctanswer)
        {
      
            if (c==correctanswer)
            {
                return true;
            }
            return false;
        }

        private bool Buttonwasclicked = false;
        //show the question on the front of the page click
        private void ShowQuestion_Click(object sender, RoutedEventArgs e)
        {
            if(!Buttonwasclicked)
            {
                foreach(RadioButton r in radioBoxes) 
                {
                    r.IsChecked = false;
                    Buttonwasclicked = true;
                }

            }
            SaveAnswer.Content = "Save Answer";
            int temp = 0;
            Exercise.Visibility = Visibility.Visible; 
            first.Visibility= Visibility.Visible;
            second.Visibility= Visibility.Visible;
            third.Visibility= Visibility.Visible;
            forth.Visibility= Visibility.Visible;
            SaveAnswer.Visibility= Visibility.Visible;
            string Btn_name = (sender as Button).Name.ToString();
            while("Q" + temp.ToString() != Btn_name)
            {
                temp++;
            }
            CurrentQuestion = temp-1;
            ShowQuestion(Btn_name,temp);

        }
        private void Exit_Click(object sender, RoutedEventArgs e)
        {
            Close();
        }

        private void Save_Click(object sender, RoutedEventArgs e)
        {
            AddToFinalGrade();
            AddGrade();
        }
        
        //save the current question's answer
        private void SaveAnswer_Click(object sender, RoutedEventArgs e)
        {
            SaveAnswer.Content = "Saved";
            int grade = 0;
            for (int i = 0; i < radioBoxes.Count; i++)
            {
                if (radioBoxes[i].IsChecked == true && CheckAnswer(radioBoxes[i].Name, exam1.Questions[CurrentQuestion].CorrectAnswerId))
                {

                    grade = 10;
                    break;
                }
                else
                {
                    grade = 0;
                }
            }
            AddToGredeList(grade, CurrentQuestion);
        }

        private void AddToGredeList(int g, int i)
        {
            qgrades[i] = g;
        }
        private void AddToFinalGrade()
        {
            Grade = 0;
            for (int i = 0; i < qgrades.Count; i++)
            {
                Grade += qgrades[i];
            }
        }

        private void first_Checked(object sender, RoutedEventArgs e)
        {
            
        }

        private void second_Checked(object sender, RoutedEventArgs e)
        {

        }

        private void third_Checked(object sender, RoutedEventArgs e)
        {
          
        }

        private void forth_Checked(object sender, RoutedEventArgs e)
        {
       
        }

        private void DispatcherTimer_Tick(object sender, EventArgs e)
        {
            if (time == TimeSpan.Zero) dispatcherTimer.Stop();
            else
            {
                time = time.Add(TimeSpan.FromSeconds(-1));
                MyTime.Text = time.ToString("c");
            }
        }
    }
}

下面是我的XAMl代码：

<Window x:Class="final_project.View.StudentExamWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:final_project.View"
        mc:Ignorable="d"
        Title="StudentExamWindow" Height="450" Width="800">
    <Border Background="#eff2f7" CornerRadius="30">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="150" />
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <!--Left Side-->
            <Grid Grid.Column="0"/>
            <Border BorderBrush="Black" BorderThickness="4">
                <StackPanel Name="QuestionPannel">
                </StackPanel>
            </Border>
            <!--Right Side-->
            <Border CornerRadius="30" Grid.Column="1">
                <Grid >
                    <Grid.RowDefinitions>
                        <RowDefinition Height="50"/>
                        <RowDefinition />
                    </Grid.RowDefinitions>
                    <!-- Title -->
                    <Grid Grid.Row="0"
                          Width="550"
                          Background="#2e3137">
                        <StackPanel >
                            <DatePicker Height="25" Width="115"
                                        HorizontalAlignment="Left"
                                        Margin="10 10 10 0"
                                        Name="datePicker1"
                                        VerticalAlignment="Top"/>
                        </StackPanel>
                        <Grid Margin="150,0,0,0">
                            <Label Name="Examtitle" Content="Exam Name"
                                   Foreground="White"
                                   Margin="10" />
                        </Grid>
                    </Grid>

                    <!--Question Show-->
                    <Grid Grid.Row="1">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="50" />
                            <RowDefinition />
                        </Grid.RowDefinitions>
                        <TextBlock Name="MyTime" Text="1:00:00" Margin="273,10,274,10" />
                        <TextBlock Name="StudentName" Text="Studentname" Margin="10,10,553,10" />
                        <Border BorderBrush="Black" BorderThickness="4">
                            <Grid Grid.Row="0" Margin="0,10,0,0">
                            </Grid>
                        </Border>
                        <Grid Grid.Row="1" Margin="0,5,0,0">
                            <TextBlock Text="Exercise NAME" Name="Exercise" Visibility="Hidden"
                                       HorizontalAlignment="Center"
                                       Width="350"
                                       Margin="0,0,0,289" />
                            <Border BorderBrush="Black" BorderThickness="4" Margin="0,-16,0,0">
                                <StackPanel Name="CheckboxList"  Width="350" Margin="69,23,0,37" HorizontalAlignment="Left" Cursor="">
                                    <TextBlock Name="Txtblock" TextWrapping="Wrap" Text=""/>
                                    <RadioButton Name="first" Content="" Visibility="Hidden" Checked="first_Checked"/>
                                    <RadioButton Name="second" Content="" Visibility="Hidden" Checked="second_Checked"/>
                                    <RadioButton Name="third" Content="" Visibility="Hidden" Checked="third_Checked"/>
                                    <RadioButton Name="forth" Content="" Visibility="Hidden" Checked="forth_Checked"/>
                                    <Button x:Name="SaveAnswer" Content="Save Answer" 
                                            Visibility="Hidden" Style="{StaticResource ResourceKey=RoundButtonTemplate}" 
                                            Width="108" 
                                            Height="33"
                                            BorderBrush="Aqua" 
                                            Background="black" Click="SaveAnswer_Click"/>

                                </StackPanel>
                            </Border>

                            <Button Name="Save" Content="Save All" Visibility="Visible" HorizontalAlignment="Left" Margin="551,231,0,0" VerticalAlignment="Top" Height="31" Width="68" RenderTransformOrigin="0.859,1.023" Click="Save_Click">
                                <Button.RenderTransform>
                                    <TransformGroup>
                                        <ScaleTransform/>
                                        <SkewTransform/>
                                        <RotateTransform Angle="0.332"/>
                                        <TranslateTransform/>
                                    </TransformGroup>
                                </Button.RenderTransform>
                            </Button>
                            <Button Name="Exit" Visibility="Visible" Content="Exit" HorizontalAlignment="Left" Margin="551,271,0,0" VerticalAlignment="Top" Height="27" Width="72" Click="Exit_Click"/>
                        </Grid>
                    </Grid>
                </Grid>


            </Border>
        </Grid>

    </Border>

</Window>

我试图创建一个bool变量来检查哪个按钮作为一个问题被点击，所以我不清除单选按钮，但仍然没有工作，它清除了点击和不点击一次

wpf

1条答案

按热度按时间
lstz6jyr

lstz6jyr1#

下面的示例使用数据绑定和数据模板实现了一个小的简单测验，以启用动态UI（例如，随着RadioButton元素的动态创建，选择的数量可能会有所不同）。由于数据绑定，视图的值会自动传输并存储在数据模型中。
该示例还展示了如何使用组合正确地设计类及其关系。
希望这个例子能帮助您理解如何应用基本的WPF技术

class Exam : INotifyPropertyChanged
{
  public Exam(IEnumerable<Question> questions)
  {
    this.Questions = new ObservableCollection<Question>(questions);
    this.CurrentQuestionIndex = -1;
  }

  public void SelectNextQuestion()
  {
    // Prevent invalid index (too high)
    this.CurrentQuestionIndex = Math.Min(this.Questions.Count - 1, this.CurrentQuestionIndex + 1);

    this.CurrentQuestion = this.Questions[this.CurrentQuestionIndex];
  }

  public void SelectPreviousQuestion()
  {
    // Prevent invalid index (too low)
    this.CurrentQuestionIndex = Math.Max(0, this.CurrentQuestionIndex - 1);

    this.CurrentQuestion = this.Questions[this.CurrentQuestionIndex];
  }

  private Question currentQuestion;
  public Question CurrentQuestion
  {
    get => this.currentQuestion;
    set
    {
      this.currentQuestion = value;
      OnPropertyChanged();
    }
  }

  public ObservableCollection<Question> Questions { get; }
  private int CurrentQuestionIndex { get; set; }

  private void OnPropertyChanged([CallerMemberName] string propertyName = null)
    => this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

  public event PropertyChangedEventHandler? PropertyChanged;
}

问题.cs

class Question : INotifyPropertyChanged
{
  public Question(string summary, Answer answer)
  {
    this.Summary = summary;
    this.Answer = answer;
  }

  private string summary;
  public string Summary
  {
    get => this.summary;
    set
    {
      this.summary = value;
      OnPropertyChanged();
    }
  }

  private Answer answer;
  public Answer Answer
  {
    get => this.answer;
    set
    {
      this.answer = value;
      OnPropertyChanged();
    }
  }

  private void OnPropertyChanged([CallerMemberName] string propertyName = null)
    => this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

  public event PropertyChangedEventHandler? PropertyChanged;
}

答案.cs

class Answer : INotifyPropertyChanged
{
  public Answer(IEnumerable<string> optionSummaries, int validOptionIndex)
  {
    this.OptionSummaries = new ObservableCollection<string>(optionSummaries);
    this.ValidOptionIndex = validOptionIndex;
  }

  private string selectedOptionSummary;
  public string SelectedOptionSummary
  {
    get => this.selectedOptionSummary;
    set
    {
      this.selectedOptionSummary = value;
      OnPropertyChanged();

      this.IsCorrect = this.OptionSummaries.IndexOf(this.SelectedOptionSummary) == this.ValidOptionIndex;
      this.IsAnswered = !string.IsNullOrWhiteSpace(this.SelectedOptionSummary);
    }
  }

  private bool isCorrect;
  public bool IsCorrect
  {
    get => this.isCorrect;
    private set
    {
      this.isCorrect = value;
      OnPropertyChanged();
    }
  }

  private bool isAnswered;
  public bool IsAnswered
  {
    get => this.isAnswered;
    private set
    {
      this.isAnswered = value;
      OnPropertyChanged();
    }
  }

  public ObservableCollection<string> OptionSummaries { get; }
  private int ValidOptionIndex { get; }

  private void OnPropertyChanged([CallerMemberName] string propertyName = null)
    => this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

  public event PropertyChangedEventHandler? PropertyChanged;
}

MainWindow.xaml.cs

public partial class MainWindow : Window
{
  private Exam Exam { get; }

  public MainWindow()
  {
    InitializeComponent();
    var questions = new List<Question>()
    {
      new Question(
        "How many hours has a day?", // Question summary
        new Answer(new [] { "12", "8", "26", "24", "21" }, // Choices
        3)), // Index of correct choice
      new Question(
        "How many continents does the world have?", 
        new Answer(new [] { "5", "6", "7", "9", "10" }, 
        2)),
    };

    this.Exam = new Exam(questions);
    this.Exam.SelectNextQuestion();
    this.DataContext = this.Exam;
  }

  private void OnShowNextQuestionButtonClicked(object sender, RoutedEventArgs e)
    => this.Exam.SelectNextQuestion();

  private void OnShowPreviousQuestionButtonClicked(object sender, RoutedEventArgs e) 
    => this.Exam.SelectPreviousQuestion();

  private void OnOptionSelected(object sender, RoutedEventArgs e)
  {
    var radioButton = sender as RadioButton;
    string? selectedOptionSummary = radioButton.Content as string;
    this.Exam.CurrentQuestion.Answer.SelectedOptionSummary = selectedOptionSummary;
  }
}

主窗口.xaml

<Window>
  <StackPanel>
    <TextBlock Text="{Binding CurrentQuestion.Summary}" />
    
    <ListBox ItemsSource="{Binding CurrentQuestion.Answer.OptionSummaries}">
      <ListBox.ItemTemplate>

        <!-- Define how each item should look like usng a DataTemplate -->
        <DataTemplate>
          <RadioButton GroupName="OptionSelector" 
                       Content="{Binding}" 
                       Click="OnOptionSelected" />
        </DataTemplate>
      </ListBox.ItemTemplate>
    </ListBox>

    <StackPanel Orientation="Horizontal">
      <Button Content="Previous"
              Click="OnShowPreviousQuestionButtonClicked" />
      <Button Content="Next"
              Click="OnShowNextQuestionButtonClicked" />
    </StackPanel>
  </StackPanel>
</Window>
赞(0）分享  回复(0）举报  2023-04-13
我来回答

相关问题

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新问答

    更多
    • 蜀ICP备13028337号-1 大数据知识库 https://www.saoniuhuo.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com