yeah

yes,it works.there's also a doubt why i cant run the uninstall .exe if it has a different productcode from setup.msi. and how can i get the productcode. thank u for ur reply,its very useful

there'r 2 cases. one maybe means a "patch" for adding some more resources. in the other case , i need an entirely new version. my question is about the second case. so i want to take a solution of reinstallation,though, im not sure whether its resonable or not... and i cant understand whats ur mean about authoring my msi's.

i develop a update .exe and its on a web server. when i start my main program, it'll query the version first.if there is a new version on the web server, it'll create a process and execute the update .exe. whats the update doing is that downloading the new setup.msi and setting up automatically.i use the the api MsiInstallProduct(path,"action=install"). but there's someting unfriendly, it'll popup the setup dialog and make the user to choose to restore or to delete. how can i make it to execute reinstallation action directly. msdn says the second parameter mapping to an action,but i just dont find anyting userful. help me .plz thank u in advance.

i'd like to known how to work with threads when there'r many clients

use method UpdateResource

its right

i found how to complete it.thx all the same

thank u,my meaning is replacing the version of my .exe with the one from server.

in the function of undating,i need to obtain the version number which is getted from web server and set it to my software. could anyone show me how to set the version in code. thanks!

can u tell me the mechanism of HuffMan Encoding,thx

use blend and try again

so abstract

why not choosing a nullable type or making a valueConvert when binding

u can use lamda method select() return a implicit class consists of u wanted 2 columns