Path.HasExtension Method is used to check whether the specified path has a file name extension or not.
This method will start the searching for a period (.) followed by at least one character from the end of the path. If this pattern is found before a DirectorySeparatorChar, AltDirectorySeparatorChar, or VolumeSeparatorChar character is encountered, this method returns true.
Syntax:
CSharp
public static bool HasExtension (string path);Here, path is the specified path to search for an extension. Returns: This method will return true if the characters that follow the last directory separator (\\ or /) or volume separator (:) in the path include a period (.) followed by one or more characters; otherwise, false. Exception: This method will give ArgumentException if the path contains one or more of the invalid characters defined in GetInvalidPathChars(). Examples:
Input : string strPath1 = "C:// myfiles//ref//file1.txt"; string strPath2 = "C:// myfiles//ref//file2"; // checking for the extension Path.HasExtension(strPath1); Path.HasExtension(strPath2); Output : true false
// C# program to check whether
// a file have an extension or not
using System;
using System.IO;
namespace Geeks {
class GFG {
// Main Method
static void Main(string[] args)
{
// taking two paths
string strPath1 = "C:// myfiles// ref// file1.txt";
string strPath2 = "C:// myfiles// ref// file2";
// checking whether the file
// has an extension or not
if (Path.HasExtension(strPath1))
Console.WriteLine("{0} have an extension...", strPath1);
else
Console.WriteLine("{0} don't have an extension...", strPath1);
// checking whether the file
// has an extension or not
if (Path.HasExtension(strPath2))
Console.WriteLine("{0} have an extension...", strPath2);
else
Console.WriteLine("{0} don't have an extension...", strPath2);
Console.ReadLine();
}
}
}
Output:
Reference:
C:// myfiles// ref// file1.txt have an extension... C:// myfiles// ref// file2 don't have an extension...