每次我在 xamarin 中保存记录时重命名记录的文件 [英] Rename a recorded file every time I save a record in xamarin

问题描述

我正在使用此代码保存我的记录:

<预><代码>字符串路径 = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;公共字符串文件名 { 获取；放;}fileName = Path.Combine(path, "sample.wav");如果 (!recorder.IsRecording){recorder.StopRecordingOnSilence = TimeoutSwitch.IsToggled;//开始录制var audioRecordTask = await recorder.StartRecording();BtnDoneRec.IsEnabled = false;等待音频记录任务；RecEditor.IsEnabled = true;BtnDoneRec.IsEnabled = false;PlayButton.IsEnabled = true;var filePath = recorder.GetAudioFilePath();如果(文件路径！= null){var stream = recorder.GetAudioFileStream();使用 (var fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write)){stream.CopyTo(fileStream);}}}别的{//停止录音...等待 recorder.StopRecording();}

我希望我的记录有一个特定的名称，并用我的 RecEditor 标记

<预><代码>使用 (var streamReader = new StreamReader(fileName)){File.Move("sample.wav", RecEditor.Text + ".wav");}

因此，每次单击保存按钮时，它都会将sample.wav"重命名为RecEditor text.wav".但是当我点击保存时，它给了我这个记录

<预><代码>System.IO.FileNotFoundException: '找不到文件'/sample.wav'.'

记录存储在/storage/emulated/0/sample.wav

sample.wav 是在我的设备中创建的，但我不知道为什么它给我找不到文件 '/sample.wav'."错误.我在这里做错了什么?

解决方案

我相信您正在寻找的是这样的:

if(File.Exists(fileName)){var newFileName = Path.Combine(path, $"{RecEditor.Text}.wav");File.Move(fileName, newFileName);}

您不需要像现在这样打开一个新的 Stream.此外，您不仅需要输入文件名，还需要输入完整的文件路径.

在使用 newfileName

的值之前，您可能想要验证 RecEditor.Text 不为空

希望这会有所帮助.-

I am saving my records using this code:

        string path = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
        public string fileName { get; set; }
        fileName = Path.Combine(path, "sample.wav");

        if (!recorder.IsRecording)
                {
                    recorder.StopRecordingOnSilence = TimeoutSwitch.IsToggled;

                    //Start recording
                    var audioRecordTask = await recorder.StartRecording();

                    BtnDoneRec.IsEnabled = false;

                    await audioRecordTask;

                    RecEditor.IsEnabled = true;
                    BtnDoneRec.IsEnabled = false;
                    PlayButton.IsEnabled = true;

                    var filePath = recorder.GetAudioFilePath();

                    if (filePath != null)
                    {
                        var stream = recorder.GetAudioFileStream();

                        using (var fileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write))
                        {
                            stream.CopyTo(fileStream);
                        }
                    }                  
                }

                else
                {                                                     
                    //stop recording ...
                    await recorder.StopRecording();                    
                }

I want my record to have a specific name which is labeled with my RecEditor

         using (var streamReader = new StreamReader(fileName))
         {
            File.Move("sample.wav", RecEditor.Text + ".wav");
         }

So it will rename "sample.wav" to "RecEditor text.wav" every time I click my save button. But when I click save, it gives me this record

System.IO.FileNotFoundException: 'Could not find file '/sample.wav'.'

The record is stored in /storage/emulated/0/sample.wav

The sample.wav is created in my device but I don't know why it give me 'Could not find file '/sample.wav'.' error. What am i doing wrong here?

解决方案

I believe that what you're looking is something like this:

if(File.Exists(fileName))
{    
    var newFileName = Path.Combine(path, $"{RecEditor.Text}.wav");
    File.Move(fileName, newFileName);
}

You don't need to open a new Stream as you are doing. Also, you need to put the full file path not only the file name.

You might want to validate that RecEditor.Text is not empty before using its value for the newfileName

Hope this helps.-

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