C # Client software automatic upgrade program

Program Interface:

This procedure explains

* Automatic updating of generic programs. It's best to put it in the same sibling directory as the program that needs to be updated automatically

* Automatic update with file interface. autoupdate.config files must be available at the same level in this program

* The file format is:

* Url= get upgrade to configuration file

* cmd= to execute after upgrade is complete

Url=url1$url2$url3$url4

Cmd=cmd.exe

* The automatic upgrade program checks the URL in order, if the first one is invalid, select the second, and so on.

* After the upgrade is completed, execute the command written at CMD.

If the URL is checked to be valid, the returned content of the URL is obtained

* Program to obtain the format of the returned content should be downloaded to the file address $ saved in the local file name

Ur1$filename1

Url2$filename2

* The program downloads the URL one by one and saves it to the corresponding directory in the upgrade program.

* If there is a autoupdate.error in the same directory to explain the upgrade process is wrong, the file is written in the wrong content.