我試圖將自定義類保存到用戶設置,但沒有太大的成功。如何使用ApplicationSettingsBase將自定義類保存到用戶設置?
我創建了一個測試項目在Visual Studio 2010與目標框架=」 .NET框架4" 。主窗體有兩個文本框用於顯示和編輯普通測試字符串和我的自定義類中的「標題」字段;連同兩個按鈕來加載和保存設置。
最後,我添加了兩個設置「TestString」(一個純字符串值)和TestData(MyDataClass類型 - 我在項目的Properties.Settings選項卡中通過從Type下拉列表中選擇「Browse ...」在「選定類型」框中手動輸入「MyUserSettingsTest.MyDataClass」,因爲它最初並不出現在可用類型列表中,但隨後會出現)。
在啓動應用程序並單擊LoadSettings時,事件處理程序將加載plain字符串和MyData,或者,如果失敗,則創建一個MyDataClass的新實例。然後,我可以在窗體上編輯純字符串和測試數據Title,然後單擊SaveSettings。如果我然後重新編輯這些值,請再次單擊LoadSettings,最後保存的值將按預期恢復爲這兩個值。到現在爲止還挺好。
的問題是,在退出程序,重新啓動它的純測試字符串恢復正常,但MyData的對象不是!顯然,代碼是堅持MyData的內存好,但沒有永久存儲?
主要形式的代碼是:
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();
}
}
}
我的測試數據類代碼:
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,如果它是的幫助,但自動生成的app.config文件(包含TestString但NOT TestData !!?的設置)爲:
<?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>
自動生成Settings.Designer.cs文件是:
//------------------------------------------------------------------------------
// <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;
}
}
}
}
請誰能告訴我,我做錯了什麼或者我需要做的就是我的自定義類來堅持正確的用戶設置什麼額外的費用。
它比試圖重新定義車輪要簡單得多。只要列表很短,它應該沒問題:)這絕對適合我,所以謝謝你,這麼簡單! –