I get some string from web use python3.4.
Here is string I get:
str="<lily>"
How to get this result?
str="<lily>"
use replace:
str="<lily>"
str.replace("<","<").replace(">",">")
Related
I whant to use TrimStart for my string value like this: How to remove all zeros from string's beginning?
But TrimStart syntax is not recognise in VisualStudio. How to corectly generate it?
my code:
string str = parameters.Internal;
string s = str;
string no_start_zeros = s.TrimStart('0');
At the top of your .CS file do you have: using system; the string.TrimStart(); method is found in the system namespace, which is contained inside mscorlib.dll - you can also try referencing mscorlib.dll directly.
TrimStart() function is used to Removes all leading occurrences of a set of characters specified in an array from the current String object.
when visual studio version you are using ? as far as I know trimStart() support in almost all version from 1.1 to 4.5
check out below snippet for more detail
string szInput = "000YTHLKJH";
string output = szInput.TrimStart('0');
//output will be : YTHLKJH
Hope it helps
I'm adding functionality to a GM script we use here at work, but when trying to post (cross site may I add) to another page, my posting value of CMD is different than what it is on the page.
It's supposed to be Access+My+Account+Info but the value that is posted becomes Access%2BMy%2BAccount%2BInfo.
So I guess my question is: What's escaping my value and how do I make it not escape? And if there's no way to unescape it, does anyone have any ideas of a workaround?
Thanks!
%2B is the code for a +. You (or whatever framework you're using) should already be decoding the POST data server-side...
Just a quick remark: If you want to decode a path segment, you can use UriUtils (spring framework):
#Test
public void decodeUriPathSegment() {
String pathSegment = "some_text%2B"; // encoded path segment
String decodedText = UriUtils.decode(pathSegment, "UTF-8");
System.out.println(decodedText);
assertEquals("some_text+", decodedText);
}
Uri path segments are different from HTML escape chars (see list). Here is an example:
#Test
public void decodeHTMLEscape() {
String someString = "some_text+";
String stringJsoup = org.jsoup.parser.Parser.unescapeEntities(someString, false);
String stringApacheCommons = StringEscapeUtils.unescapeHtml4(someString);
String stringSpring = htmlUnescape(someString);
assertEquals("some_text+", stringJsoup);
assertEquals("some_text+", stringApacheCommons);
assertEquals("some_text+", stringSpring);
}
/data/v50.0/query?q=SELECT Id from Case
This worked for me. Give space instead of '+'
I am working with VB in asp.net,
The basic problem is, I want to pair up the elements in a string, exactly like request.QueryString() will do to the elements in the query string of the web page.
However instead of the function looking at the current webpage query string I want it to look at a string (that is in the exact form of a query string) stored as a variable.
So if I define a string such as:
Dim LooksLikeAQueryString As String = "?category1=answer1&category2=answer2"
I want a function that if I input LooksLikeAQueryString and "category1" it outputs "answer1" etc.
Is there anything that can already do this or do I have to build my own function? If I have to build my own, any tips?
I should add that in this case I won't be able to append the string to the url and then run request.QueryString.
You can use the HttpUtility.ParseQueryString method - MSDN link
ParseQueryString will do it for you - something along these lines:
Private Function QueryStringValue(queryString As String, key As String) As String
Dim qscoll As NameValueCollection = HttpUtility.ParseQueryString(queryString)
For Each s As String In qscoll.AllKeys
If s = key Then Return qscoll(s)
Next
Return Nothing
End Function
Usage:
Dim LooksLikeAQueryString As String = "?category1=answer1&category2=answer2"
Response.Write(QueryStringValue(LooksLikeAQueryString, "category2"))
If you dont want the dependancy of System.Web, of the top of my head
public string GetValue(string fakeQueryString,string key)
{
return fakeQueryString.Replace("?",String.Empty).Split('&')
.FirstOrDefault(item=>item.Split('=')[0] == key);
}
I have two files htmlpage1.htm and webform1.aspx
htmlpage1.htm contains a anchor tag with href="webform1.aspx?name=abc+xyz".
When i try to access the querystring in page_load of webform1.aspx, i get "abc xyz" (abc [space] xyz). I want exact value in querystring "abc+xyz"
Note: href value cannot be changed
Any help will be appreciated
Thank You.
This will Server.UrlDecode for you:
Request.QueryString["name"] // "abc xyz"
Option 1) You can re-encode
Server.UrlEncode(Request.QueryString["name"]); // "abc+xyz"
or get the raw query data
Request.Url.Query // "?name=abc+xyz"
Option 2) Then parse the value
Request.Url.Query.Substring(Request.Url.Query.IndexOf("name=") + 5) // "abc+xyz"
ASP.net will decode the query string for your. you can get the raw query string and parse it yourself if you want.
Try webform1.aspx?name=abc%2Bxyz
Use this :
Request.QueryString["name"].Replace(" ","+");
// Refer below link for more info
http://runtingsproper.blogspot.in/2009/10/why-aspnet-accidentally-corrupts-your.html
I have an ASP.NET web form where I can can enter an email address.
I need to validate that field with acceptable email addresses ONLY in the below pattern:
xxx#home.co.uk
xxx#home.com
xxx#homegroup.com
A regular expression to validate this would be:
^[A-Z0-9._%+-]+((#home\.co\.uk)|(#home\.com)|(#homegroup\.com))$
C# sample:
string emailAddress = "jim#home.com";
string pattern = #"^[A-Z0-9._%+-]+((#home\.co\.uk)|(#home\.com)|(#homegroup\.com))$";
if (Regex.IsMatch(emailAddress, pattern, RegexOptions.IgnoreCase))
{
// email address is valid
}
VB sample:
Dim emailAddress As String = "jim#home.com"
Dim pattern As String = "^[A-Z0-9._%+-]+((#home\.co\.uk)|(#home\.com)|(#homegroup\.com))$";
If Regex.IsMatch(emailAddress, pattern, RegexOptions.IgnoreCase) Then
' email address is valid
End If
Here's how I would do the validation using System.Net.Mail.MailAddress:
bool valid = true;
try
{
MailAddress address = new MailAddress(email);
}
catch(FormatException)
{
valid = false;
}
if(!(email.EndsWith("#home.co.uk") ||
email.EndsWith("#home.com") ||
email.EndsWith("#homegroup.com")))
{
valid = false;
}
return valid;
MailAddress first validates that it is a valid email address. Then the rest validates that it ends with the destinations you require. To me, this is simpler for everyone to understand than some clumsy-looking regex. It may not be as performant as a regex would be, but it doesn't sound like you're validating a bunch of them in a loop ... just one at a time on a web page
Depending on what version of ASP.NET your are using you can use one of the Form Validation controls in your toolbox under 'Validation.' This is probably preferable to setting up your own logic after a postback. There are several types that you can drag to your form and associate with controls, and you can customize the error messages and positioning as well.
There are several types that can make it a required field or make sure its within a certain range, but you probably want the Regular Expression validator. You can use one of the expressions already shown or I think Visual Studio might supply a sample email address one.
You could use a regular expression.
See e.g. here:
http://tim.oreilly.com/pub/a/oreilly/windows/news/csharp_0101.html
Here is the official regex from RFC 2822, which will match any proper email address:
(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")#(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])
I second the use of a regex, however Patrick's regex won't work (wrong alternation). Try:
[A-Z0-9._%+-]+#home(\.co\.uk|(group)?\.com)
And don't forget to escape backslashes in a string that you use in source code, depending on the language used.
"[A-Z0-9._%+-]+#home(\\.co\\.uk|(group)?\\.com)"
Try this:
Regex matcher = new Regex(#"([a-zA-Z0-9_\-\.]+)\#((home\.co\.uk)|(home\.com)|(homegroup\.com))");
if(matcher.IsMatch(theEmailAddressToCheck))
{
//Allow it
}
else
{
//Don't allow it
}
You'll need to add the Regex namespace to your class too:
using System.Text.RegularExpressions;
Use a <asp:RegularExpressionValidator ../> with the regular expression in the ValidateExpression property.
An extension method to do this would be:
public static bool ValidEmail(this string email)
{
var emailregex = new Regex(#"[A-Za-z0-9._%-]+(#home\.co\.uk$)|(#home\.com$)|(#homegroup\.com$)");
var match = emailregex.Match(email);
return match.Success;
}
Patricks' answer seems pretty well worked out but has a few flaws.
You do want to group parts of the regex but don't want to capture them. Therefore you'll need to use non-capturing parenthesis.
The alternation is partly wrong.
It does not test if this was part of the string or the entire string
It uses Regex.Match instead of Regex.IsMatch.
A better solution in C# would be:
string emailAddress = "someone#home.co.uk";
if (Regex.IsMatch(emailAddress, #"^[A-Z0-9._%+-]+#home(?:\.co\.uk|(?:group)?\.com)$", RegexOptions.IgnoreCase))
{
// email address is valid
}
Of course to be completely sure that all email addresses pass you can use a more thorough expression:
string emailAddress = "someone#home.co.uk";
if (Regex.IsMatch(emailAddress, #"^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*#home(?:\.co\.uk|(?:group)?\.com)$", RegexOptions.IgnoreCase))
{
// email address is valid
}