我正在使用C#开发Windows Phone应用程序。它在数组中有10000个元素。我的程序sudo代码类似于
Begin
Get a random element from array
Manipulate it
Delete it
End
应该从应用程序中透彻地删除该数组元素(即,我不应该在下次应用程序启动时获取它)
如何轻松执行此任务。请给我一些代码,以便我能够轻松理解。
答案 0 :(得分:1)
您必须将数据存储在独立存储中或使用
答案 1 :(得分:1)
使用带有xml输出/输入的存储文件夹的基本示例。您可以按照自己的意愿修改它。我为自己的Windows Phone应用程序使用了更复杂的版本。
我假设您很难写回读数据。如果您需要帮助从列表中删除随机元素,请告诉我。我也会编辑这段代码。
private List<int> my_list = new List<int>();
public async Task GenericDataWrite()
{
// Get the local folder.
StorageFolder data_folder = Windows.Storage.ApplicationData.Current.LocalFolder;
// Create a new file named data_file.xml
StorageFile file = await data_folder.CreateFileAsync(@"data_file.xml", CreationCollisionOption.ReplaceExisting);
// Write the data
using (Stream s = await file.OpenStreamForWriteAsync())
{
try
{
System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(typeof(List<int>));
serializer.Serialize(s, my_list);
s.Close();
}
catch(Exception ex)
{
string error_message = ex.Message;
}
}
}
public async Task GenericDataRead()
{
// Get the local folder.
StorageFolder data_folder = Windows.Storage.ApplicationData.Current.LocalFolder;
if (data_folder != null)
{
StorageFile file = await data_folder.GetFileAsync(@"data_file.xml");
// Get the file.
System.IO.Stream file_stream = await file.OpenStreamForReadAsync();
// Read the data.
using (StreamReader streamReader = new StreamReader(file_stream))
{
System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(typeof(List<int>));
my_list = (List<int>)serializer.Deserialize(streamReader);
streamReader.Close();
}
file_stream.Close();
}
}