[英]Can't write to a text file in Windows Phone
好的,我需要在c#中寫入家庭網絡上的文本文件。 問題是我無法使用System.IO.File
因為它在Windows Phone上不受支持。 我正在嘗試使用System.IO.StreamWriter
但這會產生問題。
System.IO.StreamWriter ow;
ow = new System.IO.StreamWriter(@"\\RASPBERRYPI\pi\led.txt");
這是我所擁有的,它說:
“無法從字符串轉換為System.IO.Stream”
我一直在尋找答案,但似乎沒有人有這個問題。
我舉了一個小例子來說明寫作(和閱讀)。 這是我的xaml:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="3*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="3*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<RichEditBox Name="inputTxtBx" Margin="10" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
AcceptsReturn="True"/>
<Button Grid.Row="1" Name="write" VerticalAlignment="Center" HorizontalAlignment="Center" Content="Write"
Click="write_Click"/>
<TextBlock Name="outputTxtBlk" Grid.Row="2" Margin="10" VerticalAlignment="Stretch"
Style="{StaticResource BodyTextBlockStyle}"/>
<Grid Grid.Row="3" HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button Grid.Column="0" Name="read" VerticalAlignment="Center" HorizontalAlignment="Center"
Content="Read" Click="read_Click" Margin="5"/>
<Button Grid.Column="1" Name="delete" VerticalAlignment="Center" HorizontalAlignment="Center"
Content="Delete" Click="delete_Click" Margin="5"/>
</Grid>
</Grid>
這是說明在Windows手機上讀取和寫入文件的代碼:
private async void write_Click(object sender, RoutedEventArgs e)
{
await WriteToFile();
}
private StorageFile file;
private async Task WriteToFile()
{
// Create a new file named "outputFile.txt"
file = await ApplicationData.Current.LocalFolder.CreateFileAsync("outputFile.txt", CreationCollisionOption.OpenIfExists);
// Get the string in inputBx
string toWrite;
inputTxtBx.Document.GetText(TextGetOptions.AdjustCrlf, out toWrite);
// Write the data from the textbox
using(var stream = await file.OpenStreamForWriteAsync())
{
using(var writer = new StreamWriter(stream))
{
await writer.WriteAsync(toWrite);
}
}
inputTxtBx.Document.SetText(TextSetOptions.ApplyRtfDocumentDefaults, "");
}
private async void read_Click(object sender, RoutedEventArgs e)
{
if(file == null)
{
outputTxtBlk.Text = "You have to write first!";
}
else
{
// Read the data from disk
using(var stream = await file.OpenStreamForReadAsync())
{
using(var reader = new StreamReader(stream))
{
outputTxtBlk.Text = await reader.ReadToEndAsync();
}
}
}
}
private async void delete_Click(object sender, RoutedEventArgs e)
{
if(file == null)
{
outputTxtBlk.Text = "You have to write first!";
}
else
{
await file.DeleteAsync(StorageDeleteOption.PermanentDelete);
outputTxtBlk.Text = "File purged forever!";
file = null;
}
}
我希望這有幫助。
你不能。 Windows Phone 不支持訪問SMB /網絡文件共享。
using System.IO;
using(StreamWriter sw = new StreamWriter("Text.txt"))
{
sw.WriteLine("bla");
}
嘗試這個。
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