How can I replace the double quote in VB.NET?
This code doesn't work:
name.Replace("""," ")
You need to use a double quote within those quotes (and get the return value - String.Replace does not operate on the string itself, it returns a new string):
name = name.Replace(""""," ")
Instead of a "data link escaped" method of...
name = name.Replace("""", "")
You could be explicit and somewhat more readable...
name = name.Replace(ControlChars.DblQuote, "")
And BTW, instead of thinking of this as returning a NEW STRING; it's better to think of the REPLACE as a part of the STRING Class associated with the 'name' instance. If it's losing the old value of name that you do not want then simply...
Dim aNewString$ = name.Replace(ControlChars.DblQuote, "")
And the 'name' will remain unchanged.
name = name.Replace(Chr(34), "")
you should return the resultant string back to a string and also escape that double quotes with a double quote or "\"
name = name.Remove("""", String.Empty)
I had a nasty one where try as I might, I could not get Replace() to work. In the end, it turned out the strings I was trying to clean somehow had got a completely different characters which just LOOKED like double quotes. A genius had edited a script file using Word, so "hello" became “hello”. Subtle, or what?
Looking at the file with a hex editor, the opening quote was the three character value 0xe2 0x80 0x9c, and the closer was 0xe2 0x80 0x9d. No wonder the replace failed!
'This part is to remove the " mark in the string
Dim GetDate31 As String = Date31(16).Replace(Chr(34), "")
Related
I wrote up some code. The code is shown below. The first part is to read a html into string format. The second part is to search a mark in the string and replace the string by other string.
The 1st part (I test it many times, it works fine)
Public Function ReadTextFile(ByVal TextFileName As String) As String
Dim TempString As String
Dim StreamToDisplay As StreamReader
StreamToDisplay = New StreamReader(TextFileName)
TempString = StreamToDisplay.ReadToEnd
StreamToDisplay.Close()
Return TempString
End Function
The 2nd part (I test it many times, the search and replace does not work. I checked many times that the "TempText" DOES contain string. The "the_key_string" DOES inside the "TempText" String. I check it by using QuickWatch in VB.net. However, the replace function does NOT do its job)
Dim TextPath = C:xxxxxx
TempText = ReadTextFile(TextPath)
TempText.Replace("the_key_string", "replace_by_this_string")
Please help. I have no clue where I made the mistake
String.Replace returns new string instead of modifying the source one. You have to assign it back to your variable:
TempText = TempText.Replace("the_key_string", "replace_by_this_string")
From MSDN:
Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string.
Strings are immutable, that means once they are created you cannot modify them. So you have to create a new one and assign that to your string variable:
TempText = TempText.Replace("the_key_string", "replace_by_this_string")
MSDN: String Data Type (Visual Basic):
Once you assign a string to a String variable, that string is
immutable, which means you cannot change its length or contents. When
you alter a string in any way, Visual Basic creates a new string and
abandons the previous one. The String variable then points to the new
string.
You have to assign the value to something, like :
TempText = TempText.Replace("the_key_string", "replace_by_this_string")
This is performing the string replace, but it's not putting the result of it anywhere:
TempText.Replace("the_key_string", "replace_by_this_string")
You need to assign the result to something:
TempText = TempText.Replace("the_key_string", "replace_by_this_string")
The Replace method returns the modified string.
You need something like this:
Dim TextPath = C:xxxxxx
TempText = ReadTextFile(TextPath)
Dim ModifiedString as String
ModifiedString = TempText.Replace("the_key_string", "replace_by_this_string")
"this is a string"
If you do Replace 'string' with 'whatever' this string should be: "this is a whatever". so what you can do is put that in a new string. how? replace method returns a string so, it is easy :)
see this: msdn
try these and one might work. i think that it is the underscore.
TempText.Replace("thekeystring", "replace_by_this_string")
TempText.Replace("the key string", "replace_by_this_string")
TempText.Replace("the__key__string", "replace_by_this_string")
I have inserted a option in Dorpdown as follows
<option>إختر </option>
When I select this text from server side on any event I get this value
"إختر "
Now I want to replace this white space in the string. I have tried replace method of String class. But its not working.
str = str.replace(" ","")
Plz suggest
What you should do first is decode the HTML, such that text like but also & are converted to their textual counterparts (" " and "&"). You can do this with: WebUtility.HtmlDecode. Next you can use String.Trim to remove leading and tailing spaces.
Example:
string s = "إختر ";
string r = WebUtility.HtmlDecode(s).Trim();
Or the VB.NET equivalent:
Dim s As String = "إختر "
Dim r As String = WebUtility.HtmlDecode(s).Trim()
Evidently you can try to convert to spaces yourself. But there are examples where it is not that evident and your transcoder can get confused or decode strings the wrong way. Furthermore if in the future the people at W3C change their minds about how to encode text in HTML/XML, then your program will still work.
String.Trim will remove all kinds of white-space including spaces, new lines, tabs, carriage returns, etc. If you only want to remove spaces, you can use: .Trim(' '). Then you specify only to remove the given list of characters (here only ' ').
If you want to remove leading or trailing white-spaces from a string you just need to use String.Trim, but you have to re-assign the return value to the variable since strings are immutable:
string text = "إختر ";
text = text.Trim();
Note that you can also use TrimEnd in this case.
If you want to remove only space characters(not also tabs or new-line characters which are also white-spaces) use:
text = text.Trim(' ');
If you instead want to remove all spaces from a string you could do:
text = text.Replace(" ", "");
I think maybe your code is something like this
Dim str As String = "إختر "
str.Replace(" ", "")
But actually you should
Dim str As String = "إختر "
str = str.Replace(" ", "")
I have just had a similar problem.
It turns out, that this nbsp character is Chr(160) from the ASCII table. Thus, something like this is quite meaningful, for all the cases. It works, on a selected area:
Public Sub remove_space_in_string()
Dim r_range As Range
For Each r_range In Selection
r_range = Trim(r_range)
r_range = Replace(r_range, vbTab, "")
r_range = Replace(r_range, " ", "")
r_range = Replace(r_range, Chr(160), "")
Next r_range
End Sub
I have a variable images that is a String. The value of the images are in this format:
"['C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB01.JPG';'C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB02.JPG']"
How can I convert the value of the images to something without the double quotes in the beginning and ending (or should I change the String into some other types of variables? The format that I want is this:
['C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB01.JPG';'C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB02.JPG']
No double quotes
Thanks
The String class has a Replace method that will do that.
Dim clean as String
clean = images.Replace("""", "")
Try this...
Dim s as String = "['C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB01.JPG';'C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB02.JPG']"
s = s.Replace("'", "").Trim()
Any character or word or phrase or even a sentence is considered a string when it's enclosed in double quotes, but if the value of your string literally has double quotes, like this "SAMPLE", and you want to remove the double quotes, then do something...
Dim s as String = ""['C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB01.JPG';'C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB02.JPG']""
s = s.Replace("""", "").Trim()
Yes I noticed...double double quotes...I equated s to something that you say is passed from MATLAB, the string literally has double quotes, so to remove this, you replace double double quotes with nothing. That's how you do it in .NET. Your compiler interprets double double quotes as just a single quote :)
This worked for me: (Line had a double quote that I didn't want)
Line = Line.Replace(ChrW(34), "").Trim()
Based on the OP's comments I think there is some confusion. Maybe you are new to .Net, coming from MATLAB.
To re-iterate in VB or C# .Net this is an Empty string:
""
that is a string with length == 0. That is something distinct from a string with the value of a quote or double quote.
To continue:
Dim singleQuoteString As String = "'"
Dim doubleQuoteString As String = """"
and so, what you are asking for
['C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB01.JPG';'C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB02.JPG']
is not a string.
Now, if you want a Textbox, , console output, or something else to show that value then just take your string, like
Dim listOfImagesAsAString = "['C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB01.JPG';'C:\Users\Elvin Gentiles\Desktop\RiceLAB\BLB02.JPG']"
and assign it to where you want it, like
Console.Write(listOfImagesAsAString)
then the command prompt will show what you are asking for.
I am looking for a way to remove characters from any string that are not alphabetical characters.
I am basically just using Replace for every non-Alphabetical character. This method would take forever.
I guess I could make an array (I think) but that would still take quite a while. Is there any simple solution?
Dim wordy As String = textBox.Text.ToUpper.Replace(".", "").Replace("!", "").Replace(" ", "").Replace("'", "").Replace("?", "") _
.Replace(",", "").Replace("-", "")
The following lines of code should help.
MsgBox(Regex.Replace(s, "[^a-zA-Z ]", ""))
This will keep only upper/lowercase A-Z as well as spaces.
Your example,
Dim wordy As String = textBox.Text.ToUpper.Regex.Replace(s, "[^a-zA-Z ]", "")
You could also just use a MaskedTextBox that would allow only numeric input based on the mask.
This will remove all characters except A-Z in lower and upper case, as well as spaces. If you want spaces to be removed, remove the space from the end of the regular expression.
Dim rgx As New Regex("[^a-zA-Z ]")
Dim wordy As String = rgx.Replace(textBox.Text,"")
I want to remove the excess white spaces using VB.net
ex.
"The Quick Brown Fox"
I want output
"The Quick Brown Fox"
Thanks,
inchika
You can use a simple regular expression for that:
Dim cleaned As String = Regex.Replace(input, "\s{2,}", " ")
I realize that this question is fairly old, but there is another option that doesn't involve Regex, or manually looping through the string and replacing:
Private Function StripSpaces(input As String) As String
Return String.Join(" ", input.Split(New Char() {}, StringSplitOptions.RemoveEmptyEntries))
End Function
And the C# equivalent:
private string StripSpaces(string input)
{
return string.Join(" ", input.Split((char[])null, StringSplitOptions.RemoveEmptyEntries));
}
Using a "null" value as the split character on String.Split causes the split character to be all characters that return true if they were sent to Char.IsWhiteSpace. Therefore, calling the method this way will split your string on all whitespace, remove the empty strings, then re-join it together with a single space in between each split array element.
What you actually want is to compact any multiple white space to a single space, and one way to do that is to search for two spaces and replace them with a single space, until there are no two adjascent spaces left, something like this:
Dim myString As String = "The Quick Brown Fox"
While myString.IndexOf(" ") <> -1
myString = myString.Replace(" ", " ")
End While
Console.WriteLine(myString)
However, this is not fool-proof because of some ideosyncracies of .net strings, this might go into an endless loop, but only for some very odd inputs.
EDIT: This particular processing is faster (and simpler) using a regular expression, as pointed in the othe answers.
Try this:
Dim output As String = Regex.Replace("The Quick Brown Fox","\\s+" , " ")