在ASP.NET中进行文件处理(1)_.Net教程

Dim streamreaderobj As StreamReader
file_name = filename.PostedFile.FileName
' 读出一个指定文件，并把他指派给streamreader对象
Do
　filecont = streamreaderobj.ReadLine ()
　Response.Write( filecont & " <br> " )
Loop Until filecont = ""
' 一行一行读出文件内容，知道读到一行内容为空字符串的时候，才停止
streamreaderobj.Close
' 在读操作完成以后，关闭StreamReader对象

ii>在程序中所用到的Form的编码应该是"Multipart/Form-Data"，不用他的缺省编码。具体如下：

<form Method = "Post" EncType = "Multipart/Form-Data" runat = "server" >
</form >

2).程序的源代码：

<% @ Import Namespace = "System.IO" %>
<script language = "vb" runat = "server" >
Sub SendButton_Click ( sender as Object , e as EventArgs )
' 创建一个StreamReader对象
Dim streamreaderobj As StreamReader
Dim file_name as String
' 定义一个变量来保存从文件中读出的内容
Dim filecont As String
streamreaderobj = File.OpenText ( file_name )
panel1.visible = false
' 一行一行读出文件内容，知道读到一行内容为空字符串的时候，才停止
Do
　filecont = streamreaderobj.ReadLine ()
　' 利用StreamReader对象读取文件
　Response.Write( filecont & " <br> " )
　' 显示文件内容
Loop Until filecont = ""
　' 在读操作完成以后，关闭StreamReader对象
streamreaderobj.Close
Response.write ( " <br> 以上就是" & file_name & "文件的全部内容！ " )
End Sub
</script>
<asp:panel id = "panel1" runat = "server" >
<form Method = "Post" EncType = "Multipart/Form-Data" runat = "server" >
<p>欢迎在ASP.NET页面对文件进行读操作</p >
请选择文件名称：<input type = "file" id = "filename" runat = "server" /> <br >
<asp:button id = "Write" Text = "读文件" OnClick = "SendButton_Click" runat = "server" />
</form >
</asp:panel >