vb.net正则提取路径 vbs正则表达式怎么选择要用的字符

VB.NET 正则表达式提取^Host:\s(.+)$
^表示是一行的开始,Host:是你要匹配的内容中固定的部分(我是这么认为的) , \s表示有一个空格或者Tab,(.+)表示任意字符 , 就是匹配hm.baidu.com的,$表示是行的结尾 , 匹配结果中提取到的就是hm.baidu.com了 。
vb.net怎么实现点击下载,获取文件路径并下载下载,直接通过url读取文件,然后Response.OutputStream.Write()数据
下面提供个下载的静态方法,是C#的,供参考:
/// summary
/// 下载文件
/// /summary
/// param name="fileName"下载的文件名称(包括扩展名)/param
/// param name="filePath"下载文件的绝对路径/param
public static void DownFile(string fileName, string filePath)
{
//打开要下载的文件 , 并把该文件存放在FileStream中
System.IO.FileStream Reader = System.IO.File.OpenRead(filePath);
//文件传送的剩余字节数:初始值为文件的总大小
long Length = Reader.Length;
HttpContext.Current.Response.Buffer = false;
HttpContext.Current.Response.AddHeader("Connection", "Keep-Alive");
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.Charset = "utf-8";
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(fileName));
HttpContext.Current.Response.AddHeader("Content-Length", Length.ToString());
byte[] Buffer = new Byte[10000];//存放欲发送数据的缓冲区
int ByteToRead; //每次实际读取的字节数
while (Length0)
{
//剩余字节数不为零,继续传送
if (HttpContext.Current.Response.IsClientConnected)
{
//客户端浏览器还打开着,继续传送
ByteToRead = Reader.Read(Buffer, 0, 10000);//往缓冲区读入数据
HttpContext.Current.Response.OutputStream.Write(Buffer, 0, ByteToRead);
//把缓冲区的数据写入客户端浏览器
HttpContext.Current.Response.Flush(); //立即写入客户端
Length -= ByteToRead;//剩余字节数减少}
else
{
//客户端浏览器已经断开 , 阻止继续循环
Length = -1;
}
}//关闭该文件
Reader.Close();
}
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vb.net从文件路径中获取文件名获取方法vb.net正则提取路径,参考实例如下vb.net正则提取路径:
'获取路径名各部分:如vb.net正则提取路径: c:\dir1001\aaa.txt
'获取路径路径c:\dir1001\
Public Function GetFileName(FilePathFileName As String) As String'获取文件名aaa.txt
On Error Resume Next
Dim i As Integer, J As Integer
iLen(FilePathFileName)
JInStrRev(FilePathFileName, "\")
【vb.net正则提取路径 vbs正则表达式怎么选择要用的字符】GetFileNameMid(FilePathFileName, J + 1, i)
End Function
''获取路径路径c:\dir1001\
Public Function GetFilePath(FilePathFileName As String) As String '获取路径路径c:\dir1001\
On Error Resume Next
Dim J As Integer
JInStrRev(FilePathFileName, "\")
GetFilePathMid(FilePathFileName, 1, J)
End Function
'获取文件名但不包括扩展名aaa
Public Function GetFileNameNoExt(FilePathFileName As String) As String'获取文件名但不包括扩展名aaa
On Error Resume Next
Dim i As Integer, J As Integer, k As Integer
iLen(FilePathFileName)
JInStrRev(FilePathFileName, "\")
kInStrRev(FilePathFileName, ".")
If k0 Then
GetFileNameNoExtMid(FilePathFileName, J + 1, i - J)
Else
GetFileNameNoExtMid(FilePathFileName, J + 1, k - J - 1)
End If
End Function
'===== '获取扩展名.txt
Public Function GetFileExtName(FilePathFileName As String) As String'获取扩展名.txt

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