如何检查系统中的驱动器 [英] how to check drives in a system

问题描述

我必须检查系统中是否存在Z驱动器。如果存在Z潜水，我需要传递SourceFolder =Z：\\ test。只有当机器中没有Z驱动器时，我才需要传递SourceFolder =C：\\ test。我尝试了下面提到的代码，但由于系统有默认的C驱动器，它总是只采用SourceFolder =C：\\ test。



<预郎= C＃> DriveInfo [] allDrives = DriveInfo.GetDrives（）;


foreach （DriveInfo d in allDrives）
{
int i = allDrives.Count（）;

string aa = d.Name;
if （d.Name.Contains（ Z：\\））
{
SourceFolder = Z：\\test
}
else
{
SourceFolder = C：\\test
}
}

请协助。

提前致谢

解决方案

 使用 System.Linq; 
 
 DriveInfo [] allDrives = DriveInfo.GetDrives（）; 
 SourceFolder =（allDrives.Any（d = >  d.Name.StartsWith（  Z：）））
？  @  Z：\ test 
： @  C：\ test; 

应该有效。

我使用 @ 来避免在字符串中转义反斜杠。



希望这会有所帮助。

除了phil.o解决方案之外，如果驱动器搜索在找到肯定结果时停止搜索，那么您的解决方案会更好。目前，您的代码始终返回已检查的最终驱动器的路径。

  foreach （DriveInfo d  in  allDrives）
 {
  int  i = allDrives.Count（）; 
 
  string  aa = d.Name; 
  if （d.Name.Contains（  Z：\\））
 {
 SourceFolder =   Z：\\ test 
  break ; <跨度类= 代码注释> //  <跨度类= 代码注释> ---加入此---  
} 
 <跨度类=code-keyword> else  
 {
 SourceFolder =   C： \\test 
} 
} 

首先尝试找到你的Z-Drive：< br $> b $ b

  bool  bFound = 假; 
 
  foreach （DriveInfo d  in  allDrives）
 {
  int  i = allDrives.Count（）; 
  string  aa = d.Name; 
 
  if （d.Name.Contains（  Z：\\））
 {
 bFound =  true ; 
  break ; 
} 
} 
 
 如果（bFound）
 {
 SourceFolder =   Z：\\ test; 
} 
  else  
 {
 SourceFolder = C：\\ test; 
} 

I have to check if "Z" drive is present in a system. if "Z" dive is present i need to pass SourceFolder = "Z:\\test". Only if there is no Z drive in the machine i need to pass SourceFolder = "C:\\test". I have tried the below mentioned code but as the system having default C drive it is always taking only SourceFolder = "C:\\test".

DriveInfo[] allDrives = DriveInfo.GetDrives();


              foreach (DriveInfo d in allDrives)
              {
                  int i = allDrives.Count();

                  string aa = d.Name;
                  if (d.Name.Contains("Z:\\"))
                  {
                      SourceFolder = "Z:\\test"
                  }
                  else
                  {
                      SourceFolder = "C:\\test"
                  }
              }

Please assist.
Thanks in advance

解决方案

using System.Linq;

DriveInfo[] allDrives = DriveInfo.GetDrives();
SourceFolder = (allDrives.Any(d => d.Name.StartsWith("Z:")))
   ? @"Z:\test"
   : @"C:\test";

should work.
I used the @ to avoid escaping backslashes inside the strings.

Hope this helps.

Apart from the phil.o solution, your solution would work a lot better if the drive search stopped when it found a positive result. At the moment, your code always returns the path from the final drive checked.

foreach (DriveInfo d in allDrives)
{
    int i = allDrives.Count();

    string aa = d.Name;
    if (d.Name.Contains("Z:\\"))
    {
        SourceFolder = "Z:\\test"
        break; // --- Add this ---
    }
    else
    {
        SourceFolder = "C:\\test"
    }
}

Try to find first your Z-Drive like this:

 bool bFound = false;

foreach (DriveInfo d in allDrives)
{
   int i = allDrives.Count();
   string aa = d.Name;

   if (d.Name.Contains("Z:\\"))
   {
      bFound = true;
      break; 
   }
}
 
if (bFound)
{
   SourceFolder = "Z:\\test";
}
else
{
    SourceFolder = C:\\test;
}

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