I have a string in a masked TextBox that looks like this:
123.456.789.abc.def.ghi
"---.---.---.---.---.---" (masked TextBox format when empty, cannot use underscore X( )
Please ignore the value of the characters (they can be duplicated, and not unique as above). How can I pick out part of the string, say "789"? String.Remove() does not work, as it removes everything after the index.
You could use Split in order to separate your values if the . is always contained in your string.
string input = "123.456.789.abc.def";
string[] mySplitString = input.Split('.');
for (int i = 0; i < mySplitString.Length; i++)
{
// Do you search part here
}
Do you mean you want to obtain that part of the string? If so, you could use string.Split
string s = "123.456.789.abc.def.ghi";
var splitString = s.Split('.');
// splitString[2] will return "789"
You could simply use String.Split (if the string is actually what you have shown)
string str = "123.456.789.abc.def.ghi";
string[] parts = str.Split('.');
string third = parts.ElementAtOrDefault(2); // zero based index
if(third != null)
Console.Write(third);
I've just used Enumerable.ElementAtOrDefault because it returns null instead of an exception if there's no such index in the collection(It falls back to parts[2]).
Finding a string:
string str="123.456.789.abc.def.ghi";
int i = str.IndexOf("789");
string subStr = str.Substring(i,3);
Replacing the substring:
str = str.Replace("789","").Replace("..",".");
Regex:
str = Regex.Replace(str,"789","");
The regex can give you a lot of flexibility finding things with minimum code, the drawback is it may be difficult to write them
If you know the index of where your substring begins and the length that it will be, you can use String.Substring(). This will give you the substring:
String myString = "123.456.789";
// looking for "789", which starts at index 8 and is length 3
String smallString = myString.Substring(8, 3);
If you are trying to remove a specific part of the string, use String.Replace():
String myString = "123.456.789";
String smallString = myString.Replace("789", "");
var newstr = new String(str.where(c => "789")).tostring();..i guess this would work or you can use sumthng like this
Try using Replace.
String.Replace("789", "")
Related
Im am very new in C#.
How i can delete first element of a string using a method,i find something on this site but didnt work so help me please.
For example
string newString = oldString.Substring(1);
If you want to remove the first word from your string you could use LINQ Skip combined with String.Split and String.Join:
string str = "How are you?";
string result = string.Join(" ", str.Split().Skip(1));//"are you?"
If you want only to remove the first letter you could use String.Substring:
string result = str.Substring(1);//"ow are you?";
Or if you want a LINQ solution you could use LINQ Skip:
string result = new string(str.Skip(1).ToArray());//"ow are you?";
Another solution is to use Remove method:
string myStr = "dsafavveebvesf";
//remove one character at position 0 - at the beginning
myStr = myStr.Remove(0, 1);
If you are not aware of Linq, you can simply use for loop to do the same.
Here you can use Split method of string.
string amit = "my name is amit";
string restultStr = string.Empty;
//taking all words in sentence in one array
string [] strWords = amit.Split();
//as we start this with 1 instead of 0, it will ignore first word
for (int i = 1; i < strWords.Length; i++)
{
restultStr += strWords[i] + " ";
}
EDIT
Now I see there are two onions here, removing first letter of the string and removing first word.
Above answer was to remove first word. if you want to just remove first letter, you can always do as suggested.
string amit = "my name is amit";
string restultStr = amit.Substring(1);
I wonder if it's possible to use split to divide a string with several parts that are separated with a comma, like this:
10,12-JUL-16,11,0
I just want the Second part, the 12-JUL-16 of string and not the rest?
Yes:
var result = str.Split(',')[1];
OR:
var result = str.Split(',').Skip(1).FirstOrDefault();
OR (Better performance - takes only first three portions of the split):
var result = str.Split(new []{ ',' }, 3).Skip(1).FirstOrDefault();
Use LINQ's Skip() and First() or FirstOrDefault() if you are not sure there is a second item:
string s = "10,12-JUL-16,11,0";
string second = s.Split(',').Skip(1).First();
Or if you are absolutely sure there is a second item, you could use the array accessor:
string second = s.Split(',')[1];
Yes, you can:
string[] parts = str.Split(',');
Then your second part is in parts[1].
or:
string secondPart = str.Split(',')[1];
or with Linq:
string secondPart = str.Split(',').Skip(1).FirstOrDefault();
if (secondPart != null)
{
...
}
else
{
...
}
Also you can use not only one symbol for string splitting, i.e.:
string secondPart = str.Split(new[] {',', '.', ';'})[1];
You could use String.Split, it has an overloaded method which accepts max no of splits.
var input = "10,12-JUL-16,11,0"; // input string.
input.Split(new char[]{','},3)[1]
Check the Demo
Here's a way though the rest have already mentioned it.
string input = "10,12-JUL-16,11,0";
string[] parts = input.Split(',');
Console.WriteLine(parts[1]);
Output:
12-JUL-16
Demo
I have a string that looks like this: "texthere^D123456_02". But I want my result to be D123456.
this is what i do so far:
if (name.Contains("_"))
{
name = name.Substring(0, name.LastIndexOf('_'));
}
With this I remove at least the _02, however if I try the same way for ^ then I always get back texthere, even when I use name.IndexOf("^")
I also tried only to check for ^, to get at least the result:D123456_02 but still the same result.
I even tried to name.Replace("^" and then use the substring way I used before. But again the result stays the same.
texthere is not always the same length, so .Remove() is out of the question.
What am I doing wrong?
Thanks
When call Substring you should not start from 0, but from the index found:
String name = "texthere^D123456_02";
int indexTo = name.LastIndexOf('_');
if (indexTo < 0)
indexTo = name.Length;
int indexFrom = name.LastIndexOf('^', indexTo - 1);
if (indexFrom >= 0)
name = name.Substring(indexFrom + 1, indexTo - indexFrom - 1);
string s = "texthere^D123456_02";
string result= s.Substring(s.IndexOf("^") + 1);//Remove all before
result = result.Remove(result.IndexOf("_"));//Remove all after
Use the String.Split method :
var split1 = name.Split('^')[1];
var yourText = split1.Split('_')[0];
Or you could use RegExp to achieve basically the same.
Your easiest solution would be to split the string first, and then use your original solution for the second part.
string name = "texthere^D123456_02";
string secondPart = name.Split('^')[1]; // This will be D123456_02
Afterwards you can use the Substring as before.
With Regular Expression
string s = "texthere^D123456_02";
Regex r1 = new Regex(#"\^(.*)_");
MatchCollection mc = r1.Matches(s);
Console.WriteLine("Result is " + mc[0].Groups[1].Value);
An alternative to what's already been suggested is to use regex:
string result = Regex.Match("texthere^D123456_02", #"\^(.*)_").Groups[1].Value; // D123456
use regex.
Regex regex = new Regex(#"\^(.*)_");
Match match = regex.Match(name);
if(match.Success)
{
name= match.Groups[1].Value
}
An easier way would be to use Split
string s = "texthere^D123456_02";
string[] a = s.Split('^', '_');
if (a.Length == 3) // correct
{
}
Well, if you use the same code you posted, it's doing the right thing, you start to retrieve characters from the char 0 and stop when it finds "^", so what you will get is "texthere".
If you want only the value, then use this:
name = name.Substring(0, name.LastIndexOf('_')).Substring(name.IndexOf("^") + 1);
It will first remove whatever is after the "_" and whatever is before "^".
Substring takes a position and a length, so you need to actually figure out where your caret position is and where the underscore is to calculate the length
var name = "texthere^D123456_02";
if(name.Contains('_'))
{
var caretPos = name.IndexOf('^') + 1; // skip ahead
var underscorePos = name.IndexOf('_');
var length = underscorePos - caretPos;
var substring = name.Substring(caretPos, length);
Debug.Print(substring);
};
Try this and let me know how it goes
string inputtext = "texthere^D123456_02";
string pattern = #".+\^([A-Z]+[0-9]+)\_[0-9]+";
string result = Regex.Match(inputtext, pattern).Groups[1].Value;
String name = "texthere^D123456_02"
print name.split('_', '^')[1]
This splits your string at all occurrences of _ and ^ and returns the list of strings after the split. Since the string you need D123456 would be at the 1st index, (i.e. the 2nd position), I have printed out that.
If you are just wanting the "d123456" it's simple with just String.Split() there is no need for anything else. Just define the index you want afterwards. There are overloads on Split() for this very reason.
//...
var source = "texthere^D123456_02";
var result = source.Split(new char[] {'^', '_'}, StringSplitOptions.RemoveEmptyEntries)[1];
Console.WriteLine(result);
//Outputs: "D123456"
Hope this helps.
lets say I have string in format as below:
[val1].[val2].[val3] ...
What is the best way to get the value from the last bracket set [valx] ?
so for given example
[val1].[val2].[val3]
the result would be val3
You have to define best first, best in terms of readability or cpu-cycles?
I assume this is efficient and readable enough:
string values = "[val1].[val2].[val3]";
string lastValue = values.Split('.').Last().Trim('[',']');
or with Substring which can be more efficient, but it's not as safe since you have to handle the case that's there no dot at all.
lastValue = values.Substring(values.LastIndexOf('.') + 1).Trim('[',']');
So you need to check this first:
int indexOflastDot = values.LastIndexOf('.');
if(indexOflastDot >= 0)
{
lastValue = values.Substring(indexOflastDot + 1).Trim('[',']');
}
For a quick solution to your problem (so not structural),
I'd say:
var startIndex = input.LastIndexOf(".["); // getting the last
then using the Substring method
var value = input.Substring(startIndex + 2, input.Length - (startIndex - 2)); // 2 comes from the length of ".[".
then removing the "]" with TrimEnd function
var value = value.TrimEnd(']');
But this is by all means not the only solution, and not structural to apply.. Just one of many answers to your problem.
I think you want to access the valx.
The easiest solution that comes in my mind is this one:
public void Test()
{
var splitted = "[val1].[val2].[val3]".Split('.');
var val3 = splitted[2];
}
You can use following:
string[] myStrings = ("[val1].[val2].[val3]").Split('.');
Now you can access via index. For last you can use myStrings[myStrings.length - 1]
Providing, that none of val1...valN contains '.', '[' or ']' you can use a simple Linq code:
String str = #"[val1].[val2].[val3]";
String[] vals = str.Split('.').Select((x) => x.TrimStart('[').TrimEnd(']')).ToArray();
Or if all you want is the last value:
String str = #"[val1].[val2].[val3]";
String last = str.Split('.').Last().TrimStart('[').TrimEnd(']');
I'm assuming you always need the last brace. I would do it like this:
string input = "[val1].[val2].[val3]";
string[] splittedInput = input.split('.');
string lastBraceSet = splittedInput[splittedInput.length-1];
string result = lastBraceSet.Substring(1, lastBraceSet.Length - 2);
string str = "[val1].[val2].[val3]";
string last = str.Split('.').LastOrDefault();
string result = last.Replace("[", "").Replace("]", "");
string input="[val1].[val2].[val3]";
int startpoint=input.LastIndexOf("[")+1;
string result=input.Substring(startpoint,input.Length-startpoint-1);
I'd use the below regex. One warning is that it won't work if there are unbalanced square brackets after the last pair of brackets. Most of the answers given suffer from that though.
string s = "[val1].[val2].[val3]"
string pattern = #"(?<=\[)[^\]]+(?=\][^\[\]]*$)"
Match m = Regex.Match(s, pattern)
string result;
if (m.Success)
{
result = m.Value;
}
I would use regular expression, as they are the most clear from intention point of view:
string input = "[val1].[val2].[val3] ...";
string match = Regex.Matches(input, #"\[val\d+\]")
.Cast<Match>()
.Select(m => m.Value)
.Last();
I have a string of type
ishan,training
I want to split the string after "," i.e i want the output as
training
NOTE: "," does not have a fixed index as the string value before "," is different at different times.
e.g ishant,marcela OR ishu,ponda OR amnarayan,mapusa etc...
From all the above strings i just need the part after ","
You can use String.Split:
string[] tokens = str.Split(',');
string last = tokens[tokens.Length - 1]
Or, a little simpler:
string last = str.Substring(str.LastIndexOf(',') + 1);
var arr = string.Split(",");
var result = arr[arr.length-1];
sourcestring.Substring(sourcestring.IndexOf(',')). You might want to check sourcestring.IndexOf(',') for -1 for strings without ,.
I know this question has already been answered, but you can use linq:
string str = "1,2,3,4,5";
str.Split(',').LastOrDefault();
Although there are several comments mentioning the issue of multiple commas being found, there doesn't seem to be any mention of the solution for that:
string input = "1,2,3,4,5";
if (input.IndexOf(',') > 0)
{
string afterFirstComma = input.Split(new char[] { ',' }, 2)[1];
}
This will make afterFirstComma equal to "2,3,4,5"
Use String.Split(",") assign the result in to a string array and use what you want.
Heres a VB version. I'm sure its easy to translate to C# though
Dim str as string = "ishan,training"
str = str.split(",")(1)
return str