使用之间有什么区别
文件处理中的StreamReader.EndOfStream
和string != null
using (StreamReader sr = new StreamReader("TestFile.txt"))
{
String line;
while ((line = sr.ReadLine()) != null)
{
Console.WriteLine(line);
}
}
while (!reader.EndOfStream)
{
data = BreakLine(line);
DataRow dr = _DataTable.NewRow();
// protect against overflow
int maxColumns = Math.Min(_DataTable.Columns.Count, data.Length);
for (int i = 0; i < maxColumns; i++)
{
dr[i] = data[i];
}
_DataTable.Rows.Add(dr);
line = reader.ReadLine();
}
答案 0 :(得分:1)
这两个处理不同的情况。如果您对文件进行操作,EOF
将指示您的文件指针到达文件的末尾,而Stream
是连续的数据流(通常是单向的,而不是文件你通常可以随机访问)。
来自here它说文件
"The easiest way to think about a file is as a linear sequence of characters."
和它说的流
"We can think of a stream as a channel or conduit on which data is passed from senders to receivers."
阅读文章以获得印象。虽然它大约是C++
,但它很好地反映了基础知识。