如何检查文件是否存在c＃

Question

I would like to check file exists in the same folder where is my program. If is do something. How i can fix that ?

private void button12_Click(object sender, EventArgs e)
{

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

}

Answer 1

The reason why your code doesn't work is that GetDirectoryName returns no \\ at the end. That's even documented:

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

Use Path.Combine to get the correct directory separator char:

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

Answer 2

You can just simply use:

File.Exists("tres.xml");

This checks the current directory of your .exe