c# - 如何检查文件是否存在c#

Question

我想检查文件是否存在于我的程序所在的同一文件夹中。如果是做某事。我该如何解决？

private void button12_Click(object sender, EventArgs e)
{

    if (File.Exists(Path.GetDirectoryName(Application.ExecutablePath) + "tres.xml"))
         Upload("tres.xml");

}

Answer 1

您的代码不起作用的原因是 GetDirectoryName最后不返回 \。这甚至被记录在案:

The string returned by this method consists of all characters in the path up to but not including the last DirectorySeparatorChar or AltDirectorySeparatorChar

使用Path.Combine获取正确的目录分隔符字符:

string path =  Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "tres.xml");
if(File.Exists(path))
{
    // ...
}