wp8 独立存储 总结3（应用设置）

•可在独立存储中使用ApplicationSettings对象
•在独立存储中存储键/值对的Dictionary方式存储

•存储的对象将永久保存

在应用设置中保存数据

void saveString(string message, string name)
{
IsolatedStorageSettings.ApplicationSettings[name] = message;
IsolatedStorageSettings.ApplicationSettings.Save();
}

以dictionnary键值对方式存储

调用save方法保存至独立存储

在设置中加载设置

string loadString(string name)
{
if(IsolatedStorageSettings.ApplicationSettings.Contains(name))
{
return(string)IsolatedStorageSettings.ApplicationSettings[name];
}
else
{
return null;
}
}

在读取设置前先判读主键是否存在。

</pre><pre name="code" class="csharp">

二、不同方式

<ul style="margin: 0px; padding: 0px; border: 0px; list-style: none; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; line-height: 21px; background-color: rgb(188, 211, 229);"><li style="margin: 0px 0px 0px 30px; padding: 0px; border: 0px; list-style: disc;">独立存储设置(IsolatedStorageSetting)</li></ul><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);">用处: 允许用户在一个字典中存储键/值对,然后在读取出来.这些数据会一直保存着,无论应用程序停止/启动或者关机.除非用户删除它,或者卸载该应用程序,否则一直存在.</p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);">常用方法: Add(string key,Object value) 添加</p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> Clear() 移除所以值</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> Contain(string key) 确定是否包含指定键</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> Remove(string key) <wbr> 移除指定键</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> Save() 立即保存</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> TryGetaValue(string key,out T value) 获取指定键的值</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);">用法:</p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr> <wbr> <wbr> <wbr> // 声明一个IsolatedStorageSettings变量。 <wbr> <wbr>
 <wbr> <wbr> <wbr> <wbr> <wbr>IsolatedStorageSettings MySetting = IsolatedStorageSettings.ApplicationSettings;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr> <wbr> <wbr> <wbr> protected override void OnNavigatedFrom(System.Windows.Navigation.NavigationEventArgs e)
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> {
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> base.OnNavigatedFrom(e);
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> MySetting["name"] = this.name.Text;
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> MySetting["age"] = age.Text;
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> // 保存 <wbr>
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> MySetting.Save();
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> {
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> base.OnNavigatedTo(e);
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> // 当导航到页面，读入数据。 <wbr>
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> if (MySetting.Contains("name"))
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> {
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> name.Text = MySetting["name"] as string;
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> }
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> if (MySetting.Contains("age"))
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> {
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> age.Text = MySetting["age"] as string;
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> }
 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></p><p style="margin-top: 0px; margin-bottom: 5px; padding-top: 0px; padding-bottom: 0px; border: 0px; list-style: none; word-wrap: normal; word-break: normal; line-height: 21px; color: rgb(70, 70, 70); font-family: simsun; font-size: 14px; background-color: rgb(188, 211, 229);"> </p>