Everytime I add CharW(34) to a string it adds two "" symbols
Example:
text = "Hello," + Char(34) + "World" + Char(34)
Result of text
"Hello,""World"""
How can I just add one " symbol?
e.g Ideal result would be:
"Hello,"World""
I have also tried:
text = "Hello,""World"""
But I still get the double " Symbols
Furthermore. Adding a CharW(39), which is a ' symbol only produces one?
e.g
text = "Hello," + Char(39) + "World" + Char(39)
Result
"Hello,'World'"
Why is this only behaving abnormally for double quotes? and how can I add just ONE rather than two?
Assuming you meant the old Chr function rather than Char (which is a type).It does not add two quotation mark characters. It only adds one. If you output the string to the screen or a file, you would see that it only adds one. The Visual Studio debugger, however, displays the VB-string-literal representation of the value rather than the raw string value itself. Since the way to escape a double-quote character in a string is to put two in a row, that's the way it displays it. For instance, your code:
text = "Hello," + Chr(34) + "World" + Chr(34)
Can also be written more simply as:
text = "Hello,""World"""
So, the debugger is just displaying it in that VB syntax, just as in C#, the debugger would display the value as "Hello, \"World\"".
The text doesn't really have double quotes in it. The debugger is quoting the text so that it appears as it would in your source code. If you were to do this same thing in C#, embedded new lines are displayed using it's source code formatting.
Instead of using the debugger's output, you can add a statement in your source to display the value in the debug window.
Diagnostics.Debug.WriteLine(text)
This should only show the single set of quotes.
Well it's Very eazy
just use this : ControlChars.Quote
"Hello, " & ControlChars.Quote & "World" & ControlChars.Quote
Related
I'm having an unexpected problem which I'm hoping one of you can help me with.
I have an ASP.NET Web API with a number of end points, one of which takes user input, received as JSON, and converts it into an order object which is written to a file in .CSV format. The following is a small snippet of the full code as an example.
using (StreamWriter writer = new StreamWriter(file))
{
writer.Write(escape + order.Notes + escape + delim);
writer.Write(escape + order.Reference1 + escape + delim);
writer.Write(escape + order.Reference2 + escape + delim);
writer.WriteLine();
writer.Flush();
}
The problem I am having is that some users are inclined to add line breaks in
certain fields, and this is causing havoc with my order file. In order to remove
these new line characters, I have tried both of the following methods.
writer.Write(escape + product.Notes.Replace("\n", " ") + escape + delim);
writer.Write(escape + product.Notes.Replace(System.Environment.NewLine, " ") + escape + delim);
However, it seems that, rather than just remove the new line character and carry on writing the rest of the fields, when a new line is encountered, nothing else gets written.
Either everything else gets replace with the " " or nothing else is being written at all, but I'm not sure which.
If I remove the .Replace() the whole file is written again but with extra line breaks.
I hope somebody has experienced this one and knows the answer!
I am having the following issue:
I am using an application that allows users to concatenate text to build a URL that passes parameters to an ASP page via GET method, i.e. something like:
http://myhostname/process.asp?param1=value1¶m2=value2
Problem is value1 and value2 can contain the ampersand symbol, which is not interpreted as a text character.
The most popular solution to this issue is to encode the URL, which is not an option for me because I cannot modify the program that builds the URL. I can modify the process.asp page, but not the program that concatenates the text fields and builds the URL.
Things I've tried to search for are:
How to encode a URL using javascript directly in the browser
How to change IIS default behaviour when reading an &
Alternative ways to pass parameters, i.e. something like passing them as a single string of characters separated with pipes
Hope you can give me some guidance.
You can read the entire query string and parse it yourself, like this:
q = Request.QueryString
a = Split(q, "=")
i = 1
For Each s In a
If i mod 2 = 0 Then
If InStr(s, "&") <> InStrRev(s, "&") Then
Response.Write "Value: " & Left(s, InStrRev(s, "&") - 1) & "<br/>"
hidingParam = Right(s, Len(s) - InStrRev(s, "&"))
Response.Write "PAramName: " & hidingParam & "<br/>"
i = i + 1
Else
Response.Write "Value: " & s & "<br/>"
End If
Else
Response.Write "PAramName: " & s & "<br/>"
End If
i = i + 1
Next
Result:
URL: ...?Q=abc&def&P=123 produces
PAramName: Q Value: abc&def PAramName: P Value: 123
Note that this is less than robust. I am only illustrating my idea. I didn't test with no &.
It also doens't handle multiple "=" characters (if that's a possiblity as well).
If there are 2 (or more) ampersands in-between the equals, then only the last one is a parameter separator. So, using your URL above, and assuming that value1 = "abc&def", and value2 = "123", then the URL will look like:
http://myhostname/process.asp?param1=abc&def¶m2=123
Notice there's 2 ampersands in-between the 2 equals. The last one will be your parameter separator, the rest are part of the value. And any ampersands after the last equals are also part of the value.
You'll have to dissect the incoming URL and apply the appropriate logic.
I am using
string strurl = "Reports/ReportFilter.aspx";
and bind a tag as
AnchorLeftMenuLinks.Append(" href='javascript:OpenDialogue(" + strurl + ");' ");
but it return error as "undefined object AuditReports" as runtime it become like
href="javascript:OpenDialogue(Reports/ReportFilter.aspx);"
but when i add single quotes manually in firebug like
href="javascript:OpenDialogue('Reports/ReportFilter.aspx');"
it works fine.
can anyone suggest me that how to add single quotes in code.Yhankx in advance.
Try this
AnchorLeftMenuLinks.Append(" href='javascript:OpenDialogue(\"" + strurl + "\");' ");
Try:
var javascript = string.Format("href='javascript:OpenDialouge('{0}');'", strurl);
AnchorLeftMenuLinks.Append(javascript);
or:
AnchorLeftMenuLinks.AppendFormat("href='javascript:OpenDialouge('{0}');'", strurl);
Reason behind it was Javascript String because In JavaScript, a string is started and stopped with either single or double quotes. This means that the string was being chopped to: javascript:OpenDialogue( and your function's syntax was being incorrect and thus it was not working.
Thus it was mandatory to place a backslash (\)before each double quote in strurl. This turns each double quote into a string literal.
There are some other special characters also which needed to be placed using \
\' - single quote
\" - Double Quote
\\ - BackSlash
\n - new Line
\t - tab
I am trying to format the output of a query in a WebMatrix 2 CSHTML file. This is the code I am using:
#foreach(var row in db.Query(selectQueryString))
{
#row.Firstname; + " " + #row.lastname; + " " + #row.Entry;
}
I am getting this error:
"CS0201: Only assignment, call, increment, decrement, and new object expressions can be used as a statement"
The first issue is that the semicolons could be confusing to Razor, and they are only confusing matters. So change the line in the brackets to
<text>#row.Firstname #row.lastname #row.Entry</text>
And see if that works. The < text > tags tells Razor to output this directly as HTML and not use it as code. You don't need the + " " because once you're putting out HTML, the spaces come automatically.
The URL link below will open a new Google mail window. The problem I have is that Google replaces all the plus (+) signs in the email body with blank space. It looks like it only happens with the + sign. How can I remedy this? (I am working on a ASP.NET web page.)
https://mail.google.com/mail?view=cm&tf=0&to=someemail#somedomain.com&su=some subject&body=Hi there+Hello there
(In the body email, "Hi there+Hello there" will show up as "Hi there Hello there")
The + character has a special meaning in [the query segment of] a URL => it means whitespace: . If you want to use the literal + sign there, you need to URL encode it to %2b:
body=Hi+there%2bHello+there
Here's an example of how you could properly generate URLs in .NET:
var uriBuilder = new UriBuilder("https://mail.google.com/mail");
var values = HttpUtility.ParseQueryString(string.Empty);
values["view"] = "cm";
values["tf"] = "0";
values["to"] = "someemail#somedomain.com";
values["su"] = "some subject";
values["body"] = "Hi there+Hello there";
uriBuilder.Query = values.ToString();
Console.WriteLine(uriBuilder.ToString());
The result:
https://mail.google.com:443/mail?view=cm&tf=0&to=someemail%40somedomain.com&su=some+subject&body=Hi+there%2bHello+there
If you want a plus + symbol in the body you have to encode it as 2B.
For example:
Try this
In order to encode a + value using JavaScript, you can use the encodeURIComponent function.
Example:
var url = "+11";
var encoded_url = encodeURIComponent(url);
console.log(encoded_url)
It's safer to always percent-encode all characters except those defined as "unreserved" in RFC-3986.
unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
So, percent-encode the plus character and other special characters.
The problem that you are having with pluses is because, according to RFC-1866 (HTML 2.0 specification), paragraph 8.2.1. subparagraph 1., "The form field names and values are escaped: space characters are replaced by `+', and then reserved characters are escaped"). This way of encoding form data is also given in later HTML specifications, look for relevant paragraphs about application/x-www-form-urlencoded.
Just to add this to the list:
Uri.EscapeUriString("Hi there+Hello there") // Hi%20there+Hello%20there
Uri.EscapeDataString("Hi there+Hello there") // Hi%20there%2BHello%20there
See https://stackoverflow.com/a/34189188/98491
Usually you want to use EscapeDataString which does it right.
Generally if you use .NET API's - new Uri("someproto:with+plus").LocalPath or AbsolutePath will keep plus character in URL. (Same "someproto:with+plus" string)
but Uri.EscapeDataString("with+plus") will escape plus character and will produce "with%2Bplus".
Just to be consistent I would recommend to always escape plus character to "%2B" and use it everywhere - then no need to guess who thinks and what about your plus character.
I'm not sure why from escaped character '+' decoding would produce space character ' ' - but apparently it's the issue with some of components.