通过

ApplicationData.LocalSettings 属性

  • 参考

定义

命名空间:
Windows.Storage
编辑

获取本地应用数据存储中的应用程序设置容器。

public:
 property ApplicationDataContainer ^ LocalSettings { ApplicationDataContainer ^ get(); };
ApplicationDataContainer LocalSettings();
public ApplicationDataContainer LocalSettings { get; }
var applicationDataContainer = applicationData.localSettings;
Public ReadOnly Property LocalSettings As ApplicationDataContainer

属性值

ApplicationDataContainer

应用程序设置容器。

示例

使用 LocalSettings 属性获取 ApplicationDataContainer 对象中的设置。 使用 ApplicationDataContainer.Values 属性访问容器中的 localSettings 设置。 此示例创建并读取名为 的设置 exampleSetting。

调用 ApplicationDataContainerSettings.Remove 方法以 exampleSetting 在完成设置后将其删除。

请注意，若要访问 RoamingSettings，请使用示例中概述的相同过程，但将 的 localSettings 匹配项更改为 roamingSettings

var localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;

// Create a simple setting.
localSettings.Values["exampleSetting"] = "Hello Windows";

// Read data from a simple setting.
Object value = localSettings.Values["exampleSetting"];

if (value == null)
{
    // No data.
}
else
{
    // Access data in value.
}

// Delete a simple setting.
localSettings.Values.Remove("exampleSetting");

Windows::Storage::ApplicationDataContainer localSettings{
    Windows::Storage::ApplicationData::Current().LocalSettings() };

// Create a simple setting.
auto values{ localSettings.Values() };
values.Insert(L"exampleSetting", Windows::Foundation::PropertyValue::CreateString(L"Hello Windows"));

// Read data from a simple setting.
winrt::hstring value{ winrt::unbox_value<winrt::hstring>(values.Lookup(L"exampleSetting")) };

// Access data in value.

// Delete a simple setting.
values.Remove(L"exampleSetting");

ApplicationDataContainer^ localSettings = ApplicationData::Current->LocalSettings;

// Create a simple setting.
auto values = localSettings->Values;
values->Insert("exampleSetting", dynamic_cast<PropertyValue^>(PropertyValue::CreateString("Hello Windows")));

// Read data from a simple setting.
String^ value = safe_cast<String^>(values->Lookup("exampleSetting"));

if (!value)
{
    // No data.
}
else
{
    // Access data in value.
}

// Delete a simple setting.
values->Remove("exampleSetting");

Dim localSettings As Windows.Storage.ApplicationDataContainer = Windows.Storage.ApplicationData.Current.LocalSettings

' Create a simple setting

localSettings.Values("exampleSetting") = "Hello Windows";

' Read data from a simple setting

Dim value As Object = localSettings.Values("exampleSetting")

If value Is Nothing Then
   ' No data
Else
   ' Access data in value
End If

' Delete a simple setting

localSettings.Values.Remove("exampleSetting")

注解

对于 LocalSettings 和 RoamingSettings，每个设置的名称长度最多可以为 255 个字符。 每个设置的大小最多可为 8K 字节，每个复合设置的大小最多可为 64K 字节。

应用设置支持Windows 运行时数据类型。

适用于

另请参阅