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Grab the last value in string RSS

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Last post May 09, 2008 08:01 AM by stmarti

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dba123

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Grab the last value in string

May 06, 2008 08:17 PM|LINK

I need to traverse through my string. The first time around I want to grab the last folder. So for example

"/folder1/folder2/somepage.aspx"

I need to grab "/folder2/" and I'm not sure how to go about this using SubString.

The second time around and so fourth I need to move backwards. So I need to in my for loop then grab "/folder1/" the next time around. The string can have x number of folders in it.

When is Microsoft going to get rid of VB.NET!
- Edited by dba123 on May 06, 2008 08:19 PM
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huenemeca

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Re: Grab the last value in string

May 06, 2008 08:25 PM|LINK

I would use the string.Split function and then use a regular for loop counting backwards.

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bullpit

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Re: Grab the last value in string

May 07, 2008 12:51 PM|LINK

You can have a look at this article. It shows you how to search files in directories and subdirectories recursively. You said you wanted them in reverse order. You can apply some logic, say create an arraylist and add the directory names in reverse order or something similar. http://support.microsoft.com/kb/303974

Thanks,
Max
Let Me Google That For You!
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rjcox

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Re: Grab the last value in string

May 08, 2008 06:40 AM|LINK
Provided you only have the path part of a Uri (and Uri,GetLeftPart(UriPartial.Path) can help here), you can use System.IO.Path.GetDirectoryName() and .GetFileName.

GetDirectoryName returns all before the last separator, GetFileName returns all after the last separator. All methods of System.IO.Path handle both / and \ (as does Win32 under the covers in most cases).

So
```
Path.GetFileName(Path.GetDirectoryName("/folder1/folder2/somepage.aspx"))
```
returns "folder2".
Richard
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Bhanu241177

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7 Points

4 Posts

Re: Grab the last value in string

May 08, 2008 06:40 AM|LINK

Here is the code snippet to code the LastFolder of the URI:
string url = string.Empty;
string lastFolder = string.Empty;
int indexPos1,indexPos2;
url="/folder1/folder2/somepage.aspx";
indexPos2 = url.LastIndexOf("/");
url = url.Substring(0, indexPos2) + "%" + url.Substring(indexPos2 + 1, (url.Length - indexPos2 - 1));
indexPos1=url.LastIndexOf("/");
lastFolder = url.Substring(indexPos1 + 1, indexPos2 - indexPos1 - 1);

lastFolder is the value whoch contains the FolderName.
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vijaymann1

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208 Points

46 Posts

Re: Grab the last value in string

May 08, 2008 07:08 AM|LINK

First find the last index of / in the sring and the cut the substring to lastindex-1 length then again find the last index of / and then cut the string from lastindex + 1 till end to get the name of the folder...........

Thanks

Vijay Mann
Software Developer Noida India
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stmarti

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1061 Posts
Re: Grab the last value in string

May 09, 2008 08:01 AM|LINK
You can use regular expressions for this also:
```
string test = "/folder1/folder2/somepage.aspx";

		System.Text.RegularExpressions.Regex pattern = new System.Text.RegularExpressions.Regex( "[^/]+" );
		System.Text.RegularExpressions.Match result = pattern.Match( test );
		while( result.Success )
		{
			Response.Write( result.Value + "&lt;br />" );
			result = result.NextMatch( );
		}
```
You can fine tune this:

- get the first folder, use this pattern "^[^/]+"

- get the last folder, use this pattern "[^/]+$"

- get the folders from right top left: System.Text.RegularExpressions.Regex( "[^/]+", System.Text.RegularExpressions.RegexOptions.RightToLeft );

- ...
- Edited by stmarti on May 09, 2008 08:06 AM
- Marked as answer by Figo Fei - MSFT on May 12, 2008 09:13 AM