未保存应用程序设置

如果你想尝试，我试着通过创建一个新的表单应用程序来产生错误:

namespace WindowsFormsApplication2
{
  public partial class Form1 : Form
  {
    public Form1()
    {
        InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
        test.Text = (string)Settings.Default["lastCustomers"];
    }
    private void Form1_FormClosed(object sender, FormClosedEventArgs e)
    {
        Settings.Default["lastCustomers"] = test.Text;
        Settings.Default.Save();
    }
  }
}

在这个例子中，代码工作了。创建一个新的表单应用程序，并添加一个名称为test的文本框。每次您关闭程序并重新启动它时，您在文本框中写入的字符串将被保存并重新加载到test.Text中。

在你的例子中，你的构造函数应该是这样的:(可能的解决方案)

public MainForm()
{
    InitializeComponent();
    InitSkinGallery();
    UserLookAndFeel.Default.SkinName = Settings.Default["ApplicationSkinName"].ToString();
    lastVisitedCustomers = (StringDictionary)Settings.Default["LastVisitedCustomer"];
}

之后保存设置和加载时一样:

private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
    Settings.Default["ApplicationSkinName"] = UserLookAndFeel.Default.SkinName;
    Settings.Default["LastVisitedCustomer"] = lastVisitedCustomers;
    Settings.Default.Save();
}

这应该能解决你的问题!

编辑哦，当然，你的加载函数看起来不一样了:

private void MainForm_Load(object sender, EventArgs e)
{
    _mySqlCeEngine = new MySqlCeEngine(this);
    ShowHomePanel();
    LoadLastVisitedCustomers();
}

private void LoadLastVisitedCustomers()
{
    lbc_lastCustomersVisited.DataSource = new BindingSource(lastVisitedCustomers, null);
    lbc_lastCustomersVisited.DisplayMember = "Value";
    lbc_lastCustomersVisited.ValueMember = "Key";
}

我找不到在应用程序设置中存储Dictionary的任何解决方案，所以我决定处理string并拆分它:

public partial class MainForm : XtraForm
{
    private Dictionary<string, string> lastVisitedCustomers;
    public MainForm()
    {
        InitializeComponent();
        InitSkinGallery();
        UserLookAndFeel.Default.SkinName = Settings.Default["ApplicationSkinName"].ToString();
        lastVisitedCustomers = StringToDictionary(Settings.Default["LastVisitedCustomer"].ToString());
    }
    private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
    {
        Settings.Default["ApplicationSkinName"] = UserLookAndFeel.Default.SkinName;
        Settings.Default["LastVisitedCustomer"] = DictionaryToString(lastVisitedCustomers);
        Settings.Default.Save();
    }
    #region Dictionary management
    private string DictionaryToString(Dictionary<string, string> dic)
    {
        if (dic.Count == 0)
        {
            return string.Empty;
        }
        else
        {
            string dicString = string.Empty;
            int i = 0;
            foreach (KeyValuePair<string, string> entry in dic)
            {
                if (i == 0)
                {
                    dicString = String.Format("{0} ## {1}", entry.Key, entry.Value);
                    i++;
                }
                else
                {
                    dicString += String.Format(" -- {0} ## {1}", entry.Key, entry.Value);
                }
            }
            return dicString;
        }
    }
    private Dictionary<string, string> StringToDictionary(string str)
    {
        Dictionary<string, string> dic = new Dictionary<string,string>();
        if (String.IsNullOrEmpty(str))
        {
            return dic;
        }
        else
        {
            string[] entries = Regex.Split(str, " -- ");
            foreach (string entry in entries)
            {
                string[] kvp = Regex.Split(entry, " ## ");
                dic.Add(kvp[0], kvp[1]);
            }
            return dic;
        }
    }
}
    #endregion

现在，它工作。
我希望它能帮助到和我一样的人。

注意:您可能必须修改我的字典方法，以便处理每个例外情况。但我觉得现在可以了。

抱歉有任何英文错误