将文件从我的Azure Web角色复制到另一台计算机

Question

I have an Azure web role and a separate computer. Both of them are on the same network and both share certain folders which the other can access. If I go on my Azure web role, through remote desktop, I can go to the other computer's shared folder using \\\\comp1\\folder and add/remove/edit files there.

I have a few image files on my web role which I need to copy to the separate computer. These images are uploaded to the web role and stored there.

How can I copy those images that are on the web role, to my other computer?

I have tried using File.Copy but it always gives me Access Denied errors.

I tried doing:

File.Copy(Server.MapPath("~/image/a.jpg"),@"\\comp1\folder\b.jpg");

Result: UnauthorizedAccessException

Answer 1

I don't think you can access the file system on Azure like that, except through Local Storage?

To quote Bill Wilder

Any of your code running in either (a) ASP.NET (eg, default.aspx or default.aspx.cs) or (b) WebRole.cs/WorkerRole.cs (eg, methods OnStartup, OnRun, and OnStop which are derived from RoleEntryPoint class) will not have permission to write to the file system.

You can read and write to the Local Storage system

    try 
    {
        LocalResource myConfigsStorage = RoleEnvironment.GetLocalResource("myConfigs"); 
        string s = System.IO.File.ReadAllText(myConfigStorage.RootPath + "myFile.txt"); 
        //... do your work with s 
    } 
    catch (Exception myException) 
    { 
        ...    }

But having always used Azure with more than one instance I have never seen the need for local storage and used the blob store instead.

Read more: http://www.intertech.com/Blog/Post/Windows-Azure-Local-File-Storage-How-To-Guide-and-Warnings.aspx#ixzz26ce8rXpk