2009-07-18 82 views
0

VS C#2008 SP1mciSendString无法保存到目录路径

我创建了一个小应用程序,可以记录和播放音频。但是,我的应用程序需要将wave文件保存到用户计算机上的应用程序数据目录中。

mciSendString将C样式字符串作为参数,并且必须采用8.3格式。但是,我的问题是我无法保存它。奇怪的是有时它确实有时并不是。无论如何,大部分时间都是失败。但是,如果我直接保存到C驱动器,它首次运行所有内容。我已经使用了3种不同的方法,我在下面编码。

,我得到的,当它失败的错误编号是286.“文件没有保存。请确保您的系统有足够的磁盘空间或具有完整的网络连接”

非常感谢任何suggestins,

[DllImport("winmm.dll",CharSet=CharSet.Auto)] 
     private static extern uint mciSendString([MarshalAs(UnmanagedType.LPTStr)] string command, 
               StringBuilder returnValue, 
               int returnLength, 
               IntPtr winHandle); 

     [DllImport("winmm.dll", CharSet = CharSet.Auto)] 
     private static extern int mciGetErrorString(uint errorCode, StringBuilder errorText, int errorTextSize); 

[DllImport("Kernel32.dll", CharSet=CharSet.Auto)] 
     private static extern int GetShortPathName([MarshalAs(UnmanagedType.LPTStr)] string longPath, 
                [MarshalAs(UnmanagedType.LPTStr)] StringBuilder shortPath, 
                int length); 






// Stop recording 
     private void StopRecording() 
     { 
      // Save recorded voice 
      string shortPath = this.shortPathName(); 
      string formatShortPath = string.Format("save recsound \"{0}\"", shortPath); 
      uint result = 0; 
      StringBuilder errorTest = new StringBuilder(256); 

      // C:\DOCUME~1\Steve\APPLIC~1\Test.wav 
      // Fails 
      result = mciSendString(string.Format("{0}", formatShortPath), null, 0, IntPtr.Zero); 
      mciGetErrorString(result, errorTest, errorTest.Length); 

      // command line convention - fails 
      result = mciSendString("save recsound \"C:\\DOCUME~1\\Steve\\APPLIC~1\\Test.wav\"", null, 0, IntPtr.Zero); 
      mciGetErrorString(result, errorTest, errorTest.Length);   

      // 8.3 short format - fails 
      result = mciSendString(@"save recsound C:\DOCUME~1\Steve\APPLIC~1\Test.wav", null, 0, IntPtr.Zero); 
      mciGetErrorString(result, errorTest, errorTest.Length); 

      // Save to C drive works everytime. 
      result = mciSendString(@"save recsound C:\Test.wav", null, 0, IntPtr.Zero); 
      mciGetErrorString(result, errorTest, errorTest.Length); 

      mciSendString("close recsound ", null, 0, IntPtr.Zero); 
     } 


// Get the short path name so that the mciSendString can save the recorded wave file 
     private string shortPathName() 
     { 
      string shortPath = string.Empty; 
      long length = 0; 
      StringBuilder buffer = new StringBuilder(256); 

      // Get the length of the path 
      length = GetShortPathName(this.saveRecordingPath, buffer, 256); 

      shortPath = buffer.ToString(); 

      return shortPath; 
     } 

回答

1

尝试:

[ 串directoryString = “C:\ DOCUME〜1 \史蒂夫\ APPLIC〜1 \”; Directory.SetCurrentDirectory(directoryString);mciSendString(@“save recsound Test.wav”,null,0,IntPtr.Zero);mciSendString(“close recsound”,null,0,IntPtr.Zero); ]

+0

谢谢,我会试一试。 – ant2009 2010-04-21 06:11:05

2

我测试它在C driveD drive,只要目录路径不包含空格,它就会工作。 "C:\Test.wav""D:\mp3\test.wav"都可以工作,但"D:\mp4 folder\test.wav"不起作用。