Substring in vb

Question

I am trying to perform a Substring function on a image filename. The name format is in "images.png".

I tried using Substring it only allow me to indicate the first character till the "n" character to perform the function.

Such that SubString(1,6).

But what I want is to get any character before the ..

For example "images.png":

After the Substring function I should get "images".

Answer 1

You can use LastIndexOf in conjunction with Substring:

myString.Substring(0, myString.LastIndexOf('.'))

Though the Path class has a method that will do this in a strongly typed manner, whether the passed in path has directories or not:

Path.GetFileNameWithoutExtension("images.png")

Answer 2

How about using the Path class.

Path.GetFileNameWithoutExtension("filename.png");

Answer 3

In general for such string manipulations you can use:

mystring.Split("."c)(0)

But specifically for getting a filename without extension, it's best to use this method:

System.IO.Path.GetFileNameWithoutExtension