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How can I extract sub-string from string in c# code? [closed]

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How can I extract this sub-string "60684" from this string "/fa/Viewer/Switcher/60684/0" in c#?

You can use Split method :
string str = "/fa/12012/Switcher/60684/0";
string str2 = str.Split('/')[4];

One way is to use regex:
static void Main()
{
string pattern = #"\/[a-zA-Z]+\/[a-zA-Z]+\/[a-zA-Z]+\/([0-9]+)\/[a-z0-9]+";
var regex = new Regex(pattern);
string path = "/fa/Viewer/Switcher/60684/0";
var match = regex.Match(path);
Console.WriteLine(match.Groups[1].ToString());
}

Like this:
string url = #"/fa/12012/Switcher/60684/0";
string[] NumberAfterSwitcher = url.Split('/');
string num = (NumberAfterSwitcher.Length > 3) ? (String)url.Split('/').GetValue(3) : String.Empty;

Regex Specified argument was out of the range of valid values [closed]

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Closed 7 years ago.
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I am trying to do Regex from a website url, but it gets me an error:
Specified argument was out of the range of valid values
Regex re = new Regex("\"id\":\"([0 - 9] +)\"");
string ree = re.Matches(sr)[0].Value;
MessageBox.Show(ree);
The url output is just blank page with text. http://prntscr.com/a6xyi0

You have to move all the spaces you don't want match, you can use [0-9]+ or \d+
You can iterate over all matches for every id in the string:
Regex re = new Regex("\"id\":\"(?<id>\\d+)\"");
string[] ree = re.Matches(sr).Cast<Match>().Select(m => m.Value).ToArray();
// Or if you just want the id:
string[] ree = re.Matches(sr).Cast<Match>().Select(m => m.Groups["id"].Value).ToArray();
foreach (var item in ree)
{
//do something
}
EDIT:
If you want add the results to a ListView then this should work for you:
var sr = "{\"id\":\"11111\", ...} {\"id\":\"22222\", ...} {\"id\":\"33333\", ...} {\"id\":\"44444\", ...}";
Regex re = new Regex("\"id\":\"(?<id>\\d+)\"");
var ree = re.Matches(sr).Cast<Match>().Select(m => m.Groups["id"].Value);
foreach (var item in ree)
{
var lvItem = new ListViewItem(new string[] { item, "who column" });
listView.Items.Add(lvItem);
}
And you will get some like this:

Changing Host Names dynamically [closed]

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I have files on a local server with the address of \\localServerAddress\Folder\Program.exe. I need to remove the server address dynamically and replace it with a different server address that is being selected elsewhere in the form. The server names can be different lengths, therefore, I can not use the string.Substring function.
So given the input
\\localServerAddress\Folder\Program.exe
I would like the result
\\differentServerAddress\Folder\Program.exe

If you are always working with UNCs
Then
string toRemove = new Uri(yourString).host;
string newString = yourString.Replace(String.format(#"\\{0})",toRemove)
, String.format(#"\\{0})",whateveryouwant));

Use this method:
string changeServerInPathString(string originalString, string newServer)
{
List<string> stringParts = originalString.TrimStart('\\').Split('\\').ToList();
stringParts.RemoveAt(0);
stringParts.Insert(0, newServer);
return string.Join("\\", stringParts.ToArray()).Insert(0, "\\\\");
}

You can use something like this:
void Main()
{
string path = #"\\localServerAddress\Folder\Program.exe";
UriBuilder bld = new UriBuilder(path);
bld.Host = "NewServer";
Console.WriteLine(bld.Uri.LocalPath);
}
Result: \\newserver\Folder\Program.exe

string text = #"\\test\FolderName\foo.exe";
text = text.Replace('\\', '-'); \\ this is done as I was not able to make the regex **\\\\\\(.)*?\\** , work.
Regex rg = new Regex("--.*?-"); \\ if in case the above mentioned regex is made to work correctly please replace the regex with the same.
text = rg.Replace(text, "");
Console.WriteLine(text.Replace('-', '\\'));
Console.Read();

C# Code not returning proper File creation date [closed]

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I am trying to find the creation date of several .mp3 files, however wrong Dates are showing up, actually only one date is being repeated throughout the loop, I have done extensive research I really have however and I think it is a cache issue however I cant seem to make .Refresh work, I am using VS2010 my code is as follows
private static void Main()
{
var pstFileFolder = #"C:\Users\Damian\Downloads";
var searchPattern = "*.mp3";
var extension = ".mp3";
var serverFolder = #"C:\work\";
int count = 0;
foreach (var file in Directory.GetFiles(pstFileFolder, searchPattern))
{
string fileCreatedDatey = File.GetCreationTime(pstFileFolder).Date.ToString("yyyy-MM-dd");
var theefile = new FileInfo(file);
Console.WriteLine(fileCreatedDatey);
Console.WriteLine(theefile);
count++;
}
Console.WriteLine(count + searchPattern + " Files found");
Console.ReadKey();
}

File.GetCreationTime(pstFileFolder) will return you CreationDate for folder, and you will get the same value back for all files. Instead use:
string fileCreatedDatey = File.GetCreationTime(file).Date.ToString("yyyy-MM-dd");

Use this:
foreach (var file in Directory.GetFiles(pstFileFolder, searchPattern))
{
string fileCreatedDatey = File.GetCreationTime(file).Date.ToString("yyyy-MM-dd");
var theefile = new FileInfo(file);
Console.WriteLine(fileCreatedDatey);
Console.WriteLine(theefile);
count++;
}

Regular expressions : how to find [closed]

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Why doesn't this regex, constructed like this:
tmprect = string "gg_rct_MyReg1"
regex = #"^\s*set\s+"+tmprect+#"\s*=\s*Rect\s*\(\s*(.+)\s*,\s*(.+)\s*,\s*(.+)\s*,\s**(.+)\s*\).*$";
not work for
set gg_rct_MyReg1 = Rect (-704.0 , -352.0, 224.0 , 448.0) //rect 1
What did I do wrong?
///edited:
string findrectcoord = #"^\s*set\s+" + tmprect + #"\s*=\s*Rect\s*\(\s*([^,\s]*)\s*,\s*([^,\s]*)\s*,\s*([^,\s]*)\s*,\s*([^)\s]*)\s*\).*$";
StreamReader file3 = new StreamReader(openFileDialog1.FileName);
string line2;
while ((line2 = file3.ReadLine()) != null)
{
Regex foundrectr = new Regex(findrectcoord);
Match foundrectm = foundrectr.Match(line2);
if (foundrectm.Success)
{
MessageBox.Show("YES");
}
}
string:
set gg_rct_MyReg1 = Rect( -704.0 , -352.0, 224.0 , 288.0 ) //JassCode
Not Found

The regex itself, while ugly and inefficient, should work. You do need to assign the string you're adding into the regex before building the regex, though. While we're at it, let's clean it up:
string tmprect = "gg_rct_MyReg1";
Regex regexObj = new Regex(#"^\s*set\s+" + tmprect +
#"\s*=\s*Rect\s*\(\s*([^,\s]*)\s*,\s*([^,\s]*)\s*,\s*([^,\s]*)\s*,\s*([^)\s]*)\s*\).*$");
([^,\s]*) matches any number of characters except commas or spaces. That is more specific than .* which will match too much and force the regex engine to backtrack.