保存和加载单选按钮的值不起作用c#

C# 中单选按钮值保存和加载问题解决方案

基础概念

在 C# 中，单选按钮（RadioButton）是 Windows Forms 或 WPF 应用程序中常用的控件，用于让用户在多个选项中选择一个。保存和加载单选按钮的值是常见的需求，通常涉及以下概念：

状态持久化：将控件的状态（如选中状态）保存到存储介质（如文件、数据库或注册表）
数据绑定：将控件的属性与数据源关联
序列化：将对象状态转换为可存储或传输的格式

常见问题原因

事件处理不当：没有正确绑定保存/加载的事件
存储位置错误：保存的位置无法被读取或权限不足
序列化问题：保存格式与加载格式不匹配
线程问题：跨线程访问控件未正确处理
作用域问题：保存和加载的变量作用域不一致

解决方案

Windows Forms 示例

// 保存单选按钮状态到配置文件
private void SaveRadioButtonState()
{
    Properties.Settings.Default.RadioButton1Checked = radioButton1.Checked;
    Properties.Settings.Default.RadioButton2Checked = radioButton2.Checked;
    Properties.Settings.Default.Save();
}

// 从配置文件加载单选按钮状态
private void LoadRadioButtonState()
{
    radioButton1.Checked = Properties.Settings.Default.RadioButton1Checked;
    radioButton2.Checked = Properties.Settings.Default.RadioButton2Checked;
}

// 在窗体加载和关闭时调用
private void Form1_Load(object sender, EventArgs e)
{
    LoadRadioButtonState();
}

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    SaveRadioButtonState();
}

WPF 示例

// 使用应用程序设置保存状态
private void SaveRadioButtonState()
{
    Properties.Settings.Default["Option1"] = radioButton1.IsChecked;
    Properties.Settings.Default["Option2"] = radioButton2.IsChecked;
    Properties.Settings.Default.Save();
}

// 加载状态
private void LoadRadioButtonState()
{
    radioButton1.IsChecked = (bool?)Properties.Settings.Default["Option1"];
    radioButton2.IsChecked = (bool?)Properties.Settings.Default["Option2"];
}

// 在窗口加载和关闭时调用
private void Window_Loaded(object sender, RoutedEventArgs e)
{
    LoadRadioButtonState();
}

private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
    SaveRadioButtonState();
}

替代方案：使用 XML 序列化

using System.Xml.Serialization;
using System.IO;

public class AppSettings
{
    public bool RadioButton1Checked { get; set; }
    public bool RadioButton2Checked { get; set; }
}

// 保存到文件
private void SaveSettings()
{
    AppSettings settings = new AppSettings
    {
        RadioButton1Checked = radioButton1.Checked,
        RadioButton2Checked = radioButton2.Checked
    };

    XmlSerializer serializer = new XmlSerializer(typeof(AppSettings));
    using (TextWriter writer = new StreamWriter("settings.xml"))
    {
        serializer.Serialize(writer, settings);
    }
}

// 从文件加载
private void LoadSettings()
{
    if (File.Exists("settings.xml"))
    {
        XmlSerializer serializer = new XmlSerializer(typeof(AppSettings));
        using (TextReader reader = new StreamReader("settings.xml"))
        {
            AppSettings settings = (AppSettings)serializer.Deserialize(reader);
            radioButton1.Checked = settings.RadioButton1Checked;
            radioButton2.Checked = settings.RadioButton2Checked;
        }
    }
}