我正在尝试将自定义类保存到用户设置但没有取得多大成功。
我在Visual Studio 2010中使用Target framework =“.NET Framework 4”创建了一个测试项目。主窗体有两个文本框,用于显示和编辑普通测试字符串以及我的自定义类中的“标题”字段;连同两个按钮加载和保存设置。
最后,我添加了两个设置“TestString”(一个普通的字符串值)和TestData(MyDataClass的类型 - 我在项目的Properties.Settings选项卡中通过从Type下拉列表中选择“Browse ...”然后手动执行此操作在“选定类型”框中输入“MyUserSettingsTest.MyDataClass”,因为它最初没有出现在可用的类型列表中,但后来又出现了。)
在启动应用程序并单击LoadSettings时,事件处理程序会加载纯字符串和MyData,如果失败,则会创建MyDataClass的新实例。然后,我可以在表单上编辑纯字符串并测试数据标题,然后单击SaveSettings。如果我然后重新编辑值,请再次单击“LoadSettings”,将按预期为两个值恢复上次保存的值。到目前为止一切都很好。
问题是退出应用程序并重新启动时,普通测试字符串恢复正常,但MyData对象不是!显然,代码是将MyData保存到内存中,但不是永久存储?
主要表格代码是:
using System;
using System.Windows.Forms;
namespace MyUserSettingsTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public MyDataClass MyData {get;set;}
private void loadSettingsButton_Click(object sender, EventArgs e)
{
this.myTextBox.Text = Properties.Settings.Default.TestString;
this.MyData = Properties.Settings.Default.TestData;
if (this.MyData == null)
{
this.MyData = new MyDataClass() { ID = 1, Title = "Default New Title" };
}
this.myDataTitleTextBox.Text = this.MyData.Title;
}
private void saveSettingsButton_Click(object sender, EventArgs e)
{
this.MyData.Title = this.myDataTitleTextBox.Text;
Properties.Settings.Default.TestString = this.myTextBox.Text;
Properties.Settings.Default.TestData = this.MyData;
Properties.Settings.Default.Save();
}
}
}
我的测试数据类代码是:
using System.Configuration;
namespace MyUserSettingsTest
{
public class MyDataClass : ApplicationSettingsBase
{
public MyDataClass()
{
}
private int _id;
private string _title;
[UserScopedSetting()]
[SettingsSerializeAs(SettingsSerializeAs.Xml)]
public int ID
{
get { return _id; }
set { _id = value; }
}
[UserScopedSetting()]
[SettingsSerializeAs(SettingsSerializeAs.Xml)]
public string Title
{
get { return _title; }
set { _title = value; }
}
}
}
我不知道它是否有帮助但是自动生成的app.config文件(其中包含TestString但不是TestData !!的设置)是:
<?xml version="1.0"?>
<configuration>
<configSections>
<sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<section name="MyUserSettingsTest.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false"/>
</sectionGroup>
</configSections>
<userSettings>
<MyUserSettingsTest.Properties.Settings>
<setting name="TestString" serializeAs="String">
<value/>
</setting>
</MyUserSettingsTest.Properties.Settings>
</userSettings>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
自动生成的Settings.Designer.cs文件为:
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:4.0.30319.269
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace MyUserSettingsTest.Properties {
[global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
[global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "10.0.0.0")]
internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
public static Settings Default {
get {
return defaultInstance;
}
}
[global::System.Configuration.UserScopedSettingAttribute()]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
[global::System.Configuration.DefaultSettingValueAttribute("")]
public string TestString {
get {
return ((string)(this["TestString"]));
}
set {
this["TestString"] = value;
}
}
[global::System.Configuration.UserScopedSettingAttribute()]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
public global::MyUserSettingsTest.MyDataClass TestData {
get {
return ((global::MyUserSettingsTest.MyDataClass)(this["TestData"]));
}
set {
this["TestData"] = value;
}
}
}
}
任何人都可以告诉我我做错了什么,或者需要做些什么才能使我的自定义类能够正确地保持用户设置。
答案 0 :(得分:1)
将自定义对象另存为序列化字符串。然后你只需要存储一个字符串。例如,使用Json .NET JsonConverter序列化和反序列化对象。
Properties.Settings.Default.TestData = JsonConvert.SerializeObject<MyDataClass>(this.MyData);
然后你可以像这样读回来
this.MyData = JsonConvert.DeserializeObject<MyDataClass>(Properties.Settings.Default.TestData);