如何从uri下载音频文件并保存在Windows Phone 8的本地文件夹中？
问题描述：
我见过这类问题，但没有一个符合我的要求。我的服务器里有各种类型的铃声。现在我需要知道如何读取这些音频文件并保存到我的Windows Phone 8目录中。请帮我;我在等你宝贵的建议。先谢谢
I've seen this type of question but none of those goes to my requirements. I've got various types of ringtone in my server. now i need to know how to read those audio file and save into my windows phone 8 directory. Please help me; I'm waiting for your valuable suggestion. Thanks in Advance
答
//////下载并保存
private void addButton_Click（object sender，RoutedEventArgs e）
{
WebClient webClient = new WebClient（）;
webClient.OpenReadAsync（new Uri（https://dl.dropboxusercontent.com/u/65265347/dog38catsi_a2yn44rm.mp3，UriKind.RelativeOrAbsolute））;
webClient.OpenReadCompleted + = webClient_OpenReadCompleted;
}
无效webClient_OpenReadCompleted（object sender，OpenReadCompletedEventArgs e）
{
string fileName =createmytone.mp3;
Debug.WriteLine（e.Result） ;
使用（IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication（））
{
if（myIsolatedStorage.FileExists（fileName））
{
myIsolatedStorage.DeleteFile（fileName）;
}
使用（IsolatedStorageFileStream fileStream = new IsolatedStorageFileStream（fileName，FileMode.Create，myIsolatedStorage））
{
using（ BinaryWriter writer = new BinaryWriter（fileStream））
{
Stream resourceStream = e.Result as Stream;
//streamResourceInfo.Stream;
long length = resourceStream.Length;
byte [] buffer = new byte [32];
int readCount = 0;
使用（BinaryReader reader = new BinaryReader（resourceStream））
{
//以块的形式读取文件以减少内存消耗并提高性能
while（readCount< length）
{
int actual = reader.Read（buffer，0，buffer.Length）;
readCount + = actual;
writer.Write（buffer，0，actual）;
}
}
}
}
}
}
////设置为铃声
SaveRingtoneTask saveRingtoneTask = null;
private void setRingtoneButton_Click（object sender，RoutedEventArgs e）
{
尝试
{
string isoStorePath = string.Concat（isostore：/，createmytone.mp3 ）;
saveRingtoneTask.Source = new Uri（isoStorePath）;
saveRingtoneTask.DisplayName =我的铃声......;
saveRingtoneTask .Show（）;
}
catch（例外情况）
{
MessageBox.Show（例如消息）;
}
}
////// For Download and save
private void addButton_Click(object sender, RoutedEventArgs e)
{
WebClient webClient = new WebClient();
webClient.OpenReadAsync(new Uri("https://dl.dropboxusercontent.com/u/65265347/dog38catsi_a2yn44rm.mp3", UriKind.RelativeOrAbsolute));
webClient.OpenReadCompleted+=webClient_OpenReadCompleted;
}
void webClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
string fileName = "createmytone.mp3";
Debug.WriteLine(e.Result);
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (myIsolatedStorage.FileExists(fileName))
{
myIsolatedStorage.DeleteFile(fileName);
}
using (IsolatedStorageFileStream fileStream = new IsolatedStorageFileStream(fileName, FileMode.Create, myIsolatedStorage))
{
using (BinaryWriter writer = new BinaryWriter(fileStream))
{
Stream resourceStream = e.Result as Stream;
//streamResourceInfo.Stream;
long length = resourceStream.Length;
byte[] buffer = new byte[32];
int readCount = 0;
using (BinaryReader reader = new BinaryReader(resourceStream))
{
// read file in chunks in order to reduce memory consumption and increase performance
while (readCount < length)
{
int actual = reader.Read(buffer, 0, buffer.Length);
readCount += actual;
writer.Write(buffer, 0, actual);
}
}
}
}
}
}
//// Set as Ringtone
SaveRingtoneTask saveRingtoneTask = null;
private void setRingtoneButton_Click(object sender, RoutedEventArgs e)
{
try
{
string isoStorePath = string.Concat("isostore:/", "createmytone.mp3");
saveRingtoneTask.Source = new Uri(isoStorePath);
saveRingtoneTask.DisplayName = "My Ringtone...";
saveRingtoneTask.Show();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}