c# - 在 Directory.GetFiles() 中停止隐式通配符

Question

string[] fileEntries = Directory.GetFiles(pathName, "*.xml");

还返回类似 foo.xml_ 的文件有没有办法强制它不这样做，或者我是否必须编写代码来过滤返回结果。

这与命令提示符下的 dir *.xml 行为相同，但不同于在 Windows 资源管理器中搜索 *.xml。

Answer 1

此行为是设计使然。来自 MSDN (查看注释部分和给出的示例):

A searchPattern with a file extension of exactly three characters returns files having an extension of three or more characters, where the first three characters match the file extension specified in the searchPattern.

你可以这样限制它:

C# 2.0:

string[] fileEntries = Array.FindAll(Directory.GetFiles(pathName,  "*.xml"),
    delegate(string file) {
        return String.Compare(Path.GetExtension(file), ".xml", StringComparison.CurrentCultureIgnoreCase) == 0;
    });
 // or
string[] fileEntries = Array.FindAll(Directory.GetFiles(pathName,  "*.xml"),
    delegate(string file) {
        return Path.GetExtension(file).Length == 4;
    });

C# 3.0:

string[] fileEntries = Directory.GetFiles(pathName, "*.xml").Where(file =>
   Path.GetExtension(file).Length == 4).ToArray();
// or
string[] fileEntries = Directory.GetFiles(pathName, "*.xml").Where(file =>
    String.Compare(Path.GetExtension(file), ".xml",
        StringComparison.CurrentCultureIgnoreCase) == 0).ToArray();