Read A File Through Internet

[Guest noricat]

Dear all,

 

I am new to Vb. Now i am finding a method to read a file on server through internet by VB.net. Just like OPEN(file, ">file.txt"); by perl. How can I do like this? Use system.net? Can anybody give me some help. Thanks a million.

 

NoriCat

[Bucky]

You can use the WebClient class in the System.Net namespace to

download files and read streams from files.

 

Use the DownloadFile method to download a file (duh :)).

Use the OpenRead method to open the remote file as a stream,

which you can then read into a string by creating a StreamReader

and then ReadToEnd.

 

Here's an example of downloading a remote file to a string:

Dim sData As String
Dim stream As IO.StreamReader
Dm wc As New Net.WebClient()

stream = New IO.StreamReader(wc.OpenRead("file URL here"))

sData = stream.ReadToEnd

 

I use the above method all the time when downloading HTML to

parse through it.

 

HTH

[Guest noricat]

THANK YOU Bucky

:) :) :)

[Guest noricat]

If I want to delete that file, what class and method should I use? :confused:

I tried IO.File.delete, but failed :(

It seems must connected to the server first.:confused:

[Guest noricat]

somebody help me :( :( :( :(

[divil]

File.Delete should work, it would help if you told us what error that gives you.

[Bucky]

Delete what file? If you're using the code example I mentioned,

there is no file created; a stream is created to read from, which is

only temporary.

[Guest noricat]

Delete the file "file.txt". I read the file successfully by using your method StreamReader [(wc.OpenRead("http://www.xxx.com/file.txt"))] :). After read, I want to delete it immediately. I think my program should access the server so can receive the permission to delete the file. But what class and method should I use. I search for a few days...but still didnt find it.:( :( :(

[divil]

It's not going to be that easy to delete a file from a webserver!

 

You'll have to go in via FTP, probably.

[Guest noricat]

I SEE...:(

Anyway~thanks a lot ;)

[Guest jefftheman812]

Does anyone know how to accomplish this same task with VB 6 ?

Just to reiterate, I need to grab the title of a Internet based web page.

I really do not wish to download the entire file, I would love to "open a stream to it", I saw the example but do not recall anything like that in VB 6.

 

I have VS.net, but have not installed it yet, I would probably be lost in it and would prefer to stick to vs6 at this time.

 

Any help much appreciated !:)

[Derek Stone]

This is the VB.NET board. Post your Visual Basic 6 questions in the Visual Basic board.

[Guest jefftheman812]

Wow, I guess the advice I needed was really simple :-)

[DaveHope]

I hate to bring up a dead topic, but I'm a newbie to VB.Net and was wondering, once you've got the string, how'd I go about reading the contents line by line, like an ini file, for example:

 

[user]

SomeInfoHere

 

[Pass]

SomeMoreInfoHere

 

How'd I be able to read [user] as a value, being "SomeInfoHere" and [Pass] as "SomeMoreInfoHere " ? Thanks...

[Robby]

You wouldn't read it line-by-line, you will read the entire content using ReadToEnd, then you will need to parse whatever the string's value is yourself.

[DaveHope]

Thanks, say the content is:

 

MyInfo

MyInfo2

 

How'd i do something like:

IF Line1 = "MyInfo" then...

End IF

 

Thanks very, very much.

[aewarnick]

Look into class Regex or do a char by char search with a loop.

string word="[House]";
bool match=false;
int matchIndex = -1;
for(int i=0; i < MySearchDocument.Length; i++)
{
    if ( MySearchDocument[i] == "[" )
    {
        for(int h=1; h < word.Length; h++)
         {
              if(word[i]==MySearchDocument[i+h])
               {
                 match=true;
               }
              else match=false;
         }
     }
      if(match)
      {
          //You have what you were looking for.
          break;  //Break out of the nested loop.
      }
}

I did not test this but I hope you get the idea. If you cannot read C# at all there are some translators on the internet that allow you to paste code in a text box to see it in VB.

Edited June 2, 2003 by aewarnick