CODEWITHSUNDEEP
c#string
kakkarot
kakkarot

Reputation: 508

Remove characters after the last appearance of a delimiter in a string

Is there a way to remove the characters in a string after the last occurrence of a delimiter?

I have looked into the following questions.

Split string by last separator - In this case, the characters before the last occurrence are omitted. But I just need the opposite of this.

Remove last characters from a string in C#. An elegant way? - Here the characters after the first occurrence of the delimiter are removed.

For e.g. I have a string 

"D:\dir1\subdir1\subdir11\subdir111\file1.txt"

The result I expect is 

"D:\dir1\subdir1\subdir11\subdir111"

Note: This is just an example. I need a solution to work in other cases too.

Upvotes: 5

Views: 3403

Answers (4)

Mustafa Özçetin
Mustafa Özçetin

Reputation: 2994

Another way is to use the C# 8.0 Range operator:

string path = @"D:\dir1\subdir1\subdir11\subdir111\file1.txt";
int lastSlashIndex = path.LastIndexOf("\\");
string result = path[0..lastSlashIndex];

The value of result will be

"D:\\dir1\\subdir1\\subdir11\\subdir111"

Upvotes: 0

Karthik S
Karthik S

Reputation: 106

You can use the String.Remove() method.

string test = @"D:\dir1\subdir1\subdir11\subdir111\file1.txt";
string result = test.Remove (test.LastIndexOf ('\\'));

The value stored in result will be

"D:\dir1\subdir1\subdir11\subdir111"

Upvotes: 6

Viru
Viru

Reputation: 2246

You can easily achieve this using LastIndexOf 

string str =@"D:\dir1\subdir1\subdir11\subdir111\file1.txt"
str= str.SubString(0,str.LastIndexOf("\\"));

If you are looking for something generic then create extension method

public static string GetStringBeforeLastIndex(this string str,string delimeter)
{
  return str.SubString(0,str.LastIndexOf(delimeter));
}

Now you just have to call the method

string str =@"D:\dir1\subdir1\subdir11\subdir111\file1.txt"
    str = str.GetStringBeforeLastIndex("\\"); you can pass any delimeter

 string str =@"asdd-asdasd-sdfsdf-hfghfg"
        str = str.GetStringBeforeLastIndex("-");

Upvotes: 2

fubo
fubo

Reputation: 45947

this should be the safest way

string Pathname = @"D:\dir1\subdir1\subdir11\subdir111\file1.txt";
string Result = Path.GetDirectoryName(Pathname);

Upvotes: 1

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