string list = "AEI";
string temp1;
temp1 = temp.Trim(list.ToCharArray()); // first remove "AEI"
temp = temp.Trim(temp1.ToCharArray()); // then remove "BCDFGH" from the first string
c# : trimming a string
Author
I have a string with for example : "ABCDEFGHI"
And I want to get a new string which has only the letters "AEI"
So I do this :
But this code doesn't work.
When I debug this temp1 still contains "ABCDEFGHI"
Am I missing something here?!? :(
Yes. Trim() only removes leading and trailing characters.
What are you actually trying to do and what is your actual data set? This
does what you want rather concisely (but it's ugly!). There are likely better and more readable ways to do what you're really trying to do with your actual data set...
What are you actually trying to do and what is your actual data set? This
string temp = "ABCDEFGHI";string result = String.Join("",temp.Split("BCDFGH".ToCharArray()));does what you want rather concisely (but it's ugly!). There are likely better and more readable ways to do what you're really trying to do with your actual data set...
Author
I'm trying to get a new string with only some characters (in my case only numbers)
So if I have the following string
"hello 123 goodbye!"
I should get : "123"
and I thought the solution was first remove all the numbers "1234567890" so then I get : "hello goodbye"
and then I remove "hello goodbye" from "hello 123 goodbye" => "123"
But it seems I will have to write my own function for this :(
So if I have the following string
"hello 123 goodbye!"
I should get : "123"
and I thought the solution was first remove all the numbers "1234567890" so then I get : "hello goodbye"
and then I remove "hello goodbye" from "hello 123 goodbye" => "123"
But it seems I will have to write my own function for this :(
One way to solve the problem:
That's not a particularly efficient solution, though. For doing heavy-duty text work, regular expressions are a very handy tool, as AnthonyN1974 mentioned.
public string StripDown(string originalstring, string leavecharacters){ StringBuilder ret = new StringBuilder(originalstring.Length); foreach(char character in originalstring) { if(leavecharacters.IndexOf(character) >= 0) ret.Append(character); } return ret.ToString();}// Example usagestring foo = "Test 7 8 6 1 Blah";MessageBox.Show(StripDown(foo, "1234567890"));That's not a particularly efficient solution, though. For doing heavy-duty text work, regular expressions are a very handy tool, as AnthonyN1974 mentioned.
using System.Text.RegularExpressions;// Example usageRegex regex = new Regex("[^0-9]");string result = regex.Replace("Test 7 8 6 1 Blah", "");MessageBox.Show(result);This topic is closed to new replies.
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