在 ASP.NET 的外部 C# 类中使用 Server.MapPath
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Using Server.MapPath in external C# Classes in ASP.NET
提问by Chet
I'm trying to get the absolute path of certain files in a C# class. Server.MapPathworks great of course for ASPX and their code-behind pages, but that doesn't exist in another class file. I tried HostingEnvironment.MapPath(), but that complains that the relative virtual path isn't allowed. Any thoughts?
我正在尝试获取 C# 类中某些文件的绝对路径。 Server.MapPath当然，对于 ASPX 及其代码隐藏页面来说效果很好，但在另一个类文件中不存在。我试过HostingEnvironment.MapPath()，但抱怨相对虚拟路径是不允许的。有什么想法吗？
System.Webis already imported.
System.Web已经导入。
采纳答案by womp
The ServerUtilityclass is available as an instance in your HttpContext. If you're in an environment where you know it'll be executed inside the ASP.Net pipeline, you can use
该ServerUtility班可作为你的一个实例HttpContext。如果您处于知道它将在 ASP.Net 管道内执行的环境中，则可以使用
HttpContext.Current.Server.MapPath()
You'll have to import System.Webthough.
不过，您必须导入System.Web。
回答by Dan Diplo
Can't you just add a reference to System.Weband then you can use Server.MapPath?
你不能只添加一个引用System.Web然后你可以使用Server.MapPath吗？
Edit: Nowadays I'd recommend using the HostingEnvironment.MapPathMethod:
编辑：现在我建议使用HostingEnvironment.MapPath方法：
It's a static method in System.Webassembly that Maps a virtual path to a physical path on the server. It doesn'trequire a reference to HttpContext.
它是System.Web程序集中的一种静态方法，它将虚拟路径映射到服务器上的物理路径。它不需要对HttpContext.
回答by David McEwing
System.Reflection.Assembly.GetAssembly(type).Location
IF the file you are trying to get is the assembly location for a type. But if the files are relative to the assembly location then you can use this with System.IOnamespace to get the exact path of the file.
如果您尝试获取的文件是类型的程序集位置。但是如果文件是相对于程序集位置的，那么你可以使用它和System.IO命名空间来获取文件的确切路径。
回答by Ahmad
class test
{
public static void useServerPath(string path)
{
if (File.Exists(path)
{
\...... do whatever you wabt
}
else
{
\.....
}
}
Now when you call the method from the codebehind
现在，当您从代码隐藏中调用该方法时
for example :
例如 ：
protected void BtAtualizacao_Click(object sender, EventArgs e)
{
string path = Server.MapPath("Folder") + "\anifile.txt";
test.useServerPath(path);
}
in this way your code is to simple and with one method u can use multiple path for each call :)
通过这种方式，您的代码很简单，使用一种方法，您可以为每次调用使用多个路径:)
回答by soamazing
I use this too:
我也用这个：
System.Web.HTTPContext.Current.Server.MapPath
回答by Yakir Manor
you can also use:
您还可以使用：
var path = System.Web.Hosting.HostingEnvironment.MapPath("~/App_Data/myfile.txt")
if
如果
var path = Server.MapPath("~/App_Data");
var fullpath = Path.Combine(path , "myfile.txt");
is inaccessible
无法访问
回答by netuser
This one helped for me
这个对我有帮助
//System.Web.HttpContext.Current.Server.MapPath //
FileStream fileStream = new FileStream(System.Web.HttpContext.Current.Server.MapPath("~/File.txt"),
FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
回答by daudihus
Whether you're running within the context of ASP.NET or not, you should be able to use HostingEnvironment.ApplicationPhysicalPath
无论您是否在 ASP.NET 的上下文中运行，您都应该能够使用 HostingEnvironment.ApplicationPhysicalPath
回答by Debendra Dash
The server.mappath("") will work on aspx page,if you want to get the absolute path from a class file you have to use this-
server.mappath("") 将在 aspx 页面上工作，如果你想从类文件中获取绝对路径，你必须使用这个 -
HttpContext.Current.Server.MapPath("~/EmailLogic/RegistrationTemplate.html")
