Windows 8 Metro中文件的操作及访问(读写删除复制)
1.首先创建一个文件夹，在文件夹里创建文件private async void CreateButton_Click(object sender, RoutedEventArgs e)
{
string name=FileName.Text; //创建文件的名称
folder =ApplicationData.Current.LocalFolder;
StorageFolder tempFolder = await folder.CreateFolderAsync("Config",CreationCollisionOption.OpenIfExists);
file =await tempFolder.CreateFileAsync(name,CreationCollisionOption.OpenIfExists);
}
2.在创建好的文件里，写入我们的数据，这里介绍三种写入文件的方式
private async void WriteButton_Click(object sender, RoutedEventArgs e)
{
string content = InputTextBox.Text.Trim();
ComboBoxItem item = WriteType.SelectedItem asComboBoxItem; //选择写入的方式
string type = item.Tag.ToString();
switch (type)
{
case"1": //以文本的方式写入文件
await FileIO.WriteTextAsync(file,content);
break;
case"2": //以bytes的方式写入文件
Encoding encoding = Encoding.UTF8;
byte[] bytes = encoding.GetBytes(content);
await FileIO.WriteBytesAsync(file,bytes);
break;
case"3": //以流的方式写入文件
IBuffer buffer = Convert(content); //将string转换成IBuffer类型的
await FileIO.WriteBufferAsync(file,buffer);
break;
}
}
3.读取刚才写入文件里的数据，这里也介绍三种读取文件的方式
private async void ReadButton_Click(object sender, RoutedEventArgs e)
{
ComboBoxItem item = ReadType.SelectedItem asComboBoxItem;
string type = item.Tag.ToString();
string content = string.Empty;
switch (type)
{
case"1": //以文本的方式读取文件
content =await FileIO.ReadTextAsync(file);
break;
case"2": //以流的方式读取文件
IBuffer buffer = await FileIO.ReadBufferAsync(file);
content = Convert(buffer);
break;
case"3":
content =await Convert();
break;
}
ShowTextBox.Text = content;
}
private IBuffer Convert(string text) //将string转换成IBuffer类型的
{
using (InMemoryRandomAccessStream stream = newInMemoryRandomAccessStream())
{
using (DataWriter dataWriter = newDataWriter())
{
dataWriter.WriteString(text);
return dataWriter.DetachBuffer();
}
}
}
private string Convert(IBuffer buffer) //将IBuffer转换成string类型的
{
string text = string.Empty;
using (DataReader dataReader=DataReader.FromBuffer(buffer))
{
text = dataReader.ReadString(buffer.Length);
}
return text;
}
private async Task Convert()
{
string text=string.Empty;
using (IRandomAccessStream readStream = await file.OpenAsync(FileAccessMode.Read))
{
using (DataReader dataReader = newDataReader(readStream))
{
UInt64 size = readStream.Size;
if (size
页:
[1]