PrintServerException-"...名称无效"即使我可以从Windows访问路径 [英] PrintServerException - "...name is invalid" even though I can access the path from windows

问题描述

类似于以下内容的行引发了上述异常:

A line similar to the following threw the above exception:

PrintServer ps = new PrintServer(@"\\prntsrv");

当我在Windows上使用运行..."时，上面的地址可以正常工作，并将我带到打印作业列表，所以为什么该行代码不起作用?

When I use "Run..." on Windows the address above does work and take me to the list of print jobs so why does the line of code not work?

推荐答案

显然，地址 \\ prntsrv 是 \\ prntserv 和 PrintServer 构造函数无法处理它.为了解决这个问题，我使用了以下代码(我也可以只使用catch块中的代码，它可以工作，但最好不要这样做):

Apparently, the address \\prntsrv was a DNS alias to \\prntserv and the PrintServer constructor was unable to deal with it. To get around this issue I used the following code (I could also use just the code in the catch block instead and it would work, but preferred not to):

        try
        {
            // Create object to monitor the printer queue
            PrintServer printServer = new PrintServer(serverPath);
            mPrintQueue = printServer.GetPrintQueue(printerName);
        }
        catch (PrintServerException ex)
        {
            // If the problem might be creating the server because the name is an alias
            if (ex.Message.Contains("printer name is invalid."))
            {
                string actualServerHostname = "\\\\" + Dns.GetHostEntry(serverPath.TrimStart('\\')).HostName;

                // Create object to monitor the printer queue
                PrintServer printServer = new PrintServer(actualServerHostname);
                mPrintQueue = printServer.GetPrintQueue(printerName);

                // Write to log about the use of a different address
            }
            else
            {
                throw;
            }
        }

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