如果我使用FileStream创建StreamReader,当我关闭FileStream时StreamReader会关闭还是我还需要关闭StreamReader？
public void ReadFile()
{
var file = new FileStream("c:\file.txt",FileMode.Open,FileAccess.Read);
var reader = new StreamReader(file);
try
{
txtFile.Text = reader.ReadToEnd();
}
catch (Exception)
{
throw;
}
finally
{
file.Close();
}
}
解决方法
基本上是的.您实际上不必关闭StreamReader.如果这样做,它所做的就是关闭底层流.
@Bruno对关闭最外层包装器提出了一个很好的观点.最好关闭最外层的流并让它关闭底层流,以确保正确释放所有资源.
来自Reflector ……
public class StreamReader : TextReader
{
public override void Close()
{
this.Dispose(true);
}
protected override void Dispose(bool disposing)
{
try
{
if ((this.Closable && disposing) && (this.stream != null))
{
this.stream.Close();
}
}
finally
{
if (this.Closable && (this.stream != null))
{
this.stream = null;
this.encoding = null;
this.decoder = null;
this.byteBuffer = null;
this.charBuffer = null;
this.charPos = 0;
this.charLen = 0;
base.Dispose(disposing);
}
}
}
}
