Find A Substring Within A Stringbuilder?
Jan 14, 2007I want to keep away from string object. I have a stringbuilder object, and I want to know if it contains 'Firefox'.
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StringBuilder - Would The World Of Strings Be Better If Stringbuilder Had IndexOf
Jul 1, 2011Would the world of strings be better if stringbuilder had IndexOf?
View 2 RepliesTrying To Find Substring Efficiently
Jan 5, 2011It seems to work fine for a small text file but when I use files larger than 100MB it does not give me an accurate count.The program is pretty simple. It should return the number of occurences of a substring from within a text file. I look for a match to the first character of the substring and if found then my code should test to see if the whole substring exists.I have run several tests but for some reason I am not getting an accurate result. I used the windowsupdate.log file. My code trturned 34596 hits but when I used MS Word to find the number of occurences it returned 50096 [code]
View 3 RepliesFind Position Of First Occurrence Of A Substring In A String?
May 31, 2009I wan't a method with which to find a string within another string. It should return the position of the first occurrence of the substring. (In VB 2008 !)
View 2 RepliesHow To Find The Space Using Substring To Display Initials
Jan 27, 2012The part of the program I'm trying to write is supposed to take the users input, which is their name, and in a listbox spit out their initials. I have so far:
Dim initials As String
Dim indexspace As Integer
initials = name.Substring(0, 1)
indexspace = name.IndexOf(" ")
lstInvoice.Items.Add(String.Format(strFormat, "Invoice ID", initials & space))
When I run the program, I can get the first initial to pop up, but I am not certain how to get the second to pop up.
Find A Substring In An ArrayList, StringCollection Or List(Of String)
Jun 7, 2010I've got some code that creates a list of AD groups that the user is a member of, with the intention of saying 'if user is a member of GroupX then allow admin access, if not allow basic access'.
I was using a StringCollection to store this list of Groups, and intended to use the Contains method to test for membership of my admin group, but the problem is that this method only compares the full string - but my AD groups values are formatted as cn=GroupX, etc....
I want to be easily able to determine if a particular substring (i.e. 'GroupX') appears in the list of groups. I could always iterate through the groups check each for a substring representing my AD group name, but I'm more interested in finding out if there is a 'better' way.
Clearly there are a number of repositories for the list of Groups, and it appears that Generics (List(Of String)) are more commonly preferred (which I may well implement anyway) but there is no in-built means of checking for a substring using this method either.
I've settled on using a List(Of), and I've borrowed from Dan's code to iterate through the list.
Make A Regular Expression To Find A Substring Within A String?
Nov 20, 2009How do I make a regular expression to find a substring within a string that looks like: |sdrt446-7fdfs23| ? The number of characters and types change. So I need whatever in within the | |.
View 3 RepliesC# - Prepend A Substring If The Source String Does Not Begin With The Same Substring?
Oct 10, 2011I'm trying to create a valid RegEx replacement pattern for correctly formatting specific .XML file names. Specifically, if a file name does not begin with a prefix, let's say, ACE_. If the XML file name and extension does not begin with ACE_, prepend the string ACE_ to the file name.For example, if my input source string is the following:
Widgets.xml
I would like to execute a single RegEx Replacement that would result in the string being:
ACE_Widgets.xml.
Conversely, if the string already begins with ACE_, I would like it to remain unchanged. Also,how can I include the pattern ".xml" to ensure that the string pattern for the file name and extension ends with ".xml" in the same matching pattern for the RegEx Replacement pattern? As for the match, I have some luck with the following:
^ACE_{1}[dD]+
Which indicates there is a match for the pattern if the input string is ACE_Widgets.xml and no match if the string is Widgets.xml
The RegEx pattern would suffice, but if you need to know the language in which I'd like to use the replacement pattern is in .NET 4.0 in either C# or VB.NET.
The following posting is close to what Im looking for, but with the inclusion of the *ix directory path prefix, and the use of preg_replace() in PHP, I'm having a bit of a struggle getting it to work with what I need to do:
Regular Expression: How to replace a string that does NOT start with something?
[2008] Richtextbox Substring - Select A Substring With 2 Criteria?
Feb 3, 2009How will I select a substring with 2 criteria? I have a Richtextbox where I select a number after a : with this code; For Each line As String In Richtextbox1.Lines Dim equalsPos As Integer = line.IndexOf(":") + 1 txtFound.AppendText(line.Substring(equalsPos, line.Length - equalsPos)) Next This is working ok, but the whole line.length is appended for number2. The line ex. Some text:my number some text-my number2. I want my number appended to txtFound, and my number2 appended to txtFound2. With my code only number2 can be appended correct.
View 4 RepliesAppropriate Way To Set StringBuilder To An Empty String?
May 19, 2010I'm using VB's StringBuilder, and I was curious what is considered "best practice" for emptying the builder/setting it to a new string. Would it be something like this:[code]or is there a "Better" way?
View 2 RepliesAsp.net - Display Dropdownlist In Stringbuilder?
Jun 19, 2012i'm using string builder for generating Passenger List in which i have used a tables i want to add dropdownlist into this Passenger . what i did is i have taken one main table --
strHTML1.Append("<table align=center cellpadding='0' cellspacing='0' width='100%'>");
strHTML1.Append("<tr>");
strHTML1.Append("<td>");
strHTML1.Append("Passenger");
[code]....
the prob is it is not show the dropdownlist when i run the project.
Bold Text Of A Stringbuilder?
Apr 4, 2007I'm trying to find out an easy way of bolding a string of my stringbuilder...if that is even possible.The stringbuilder eventually passes all the text to richtextbox..I'd like to bold this string
sb.AppendLine("--------------------------------")
and also
sb.AppendLine("Results for " & finalname)
[code].....
C# - Removing A Character From Stringbuilder?
Apr 18, 2011I am having the following string builder as msrtResult, which is quite long:
mstrResult.Append(rtbResult.Text).Append("})})" + Environment.NewLine)
How can I remove the last "," from mstrResult Now? (it is in the middle of that mstrResult and it is not the last character of the whole string since I am appending strings to it)I should do it before adding the newline.
Replacing For Each Stringbuilder With A Regex?
Jul 29, 2009I have a sub that takes a string, replaces all characters that are not alphanumberic and or a "/" and replaces it with a space. Then it goes through and replaces all multiple spaces with a single space.
Right now I am using a string builder to do this. My problem is that this action must be done several hundred to thousand times depending on the filesize I am comparing it to (1 richtextbox line = 1 string)
I believe I should see a significant increase in performance if I can figure out how to do this using a single regex.replace function.How would I go about constructing a regex.replace function that would keep all alphanumberic characters and "/" and replace everything else with a single space?
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Returning Stringbuilder Contents?
Feb 21, 2009I've got a stringbuilder variable, that I want to return the contents of, but if it's empty I want to return "|", so is it best to use stringbuilder.tostring in the compare statement e.g
If lReturnStringBuilder.ToString = String.Empty Then
lReturnStringBuilder.Append("|")
End If
[code].....
Use StringBuilder When Declaring A String?
Nov 20, 2009do you also have to use StringBuilder when declaring a String like this?:
View 11 RepliesC# - Why Isn't There An Equivalent Of StringBuilder For Other Immutable Types
Jan 13, 2012StringBuilder exists purely for the reason that strings in .NET are immutable, that is that traditional string concatenation can use lots of resources (due to lots of String objects being created).So, since an Int32 is also immutable why don't classes exist for multiple addition for example?
View 4 RepliesCheck If A StringBuilder Contains A Certain Character Or String?
Nov 5, 2010How can I check if a StringBuilder contains a certain character or string? There is no Contains method like the string class has.
View 8 RepliesConvert A Stringbuilder To A Two Dimensional Array?
Dec 16, 2010Suppose a stringbuilder is delimited by tab, I want to convert it to a matrix. How to do it?
View 3 RepliesCreating A StringBuilder With A Large Capacity?
May 2, 2012I've found the following code in my boss's project:
Dim strBuilder As New System.Text.StringBuilder("", 1000000)
Before I call him out on it, I'd like to confirm whether this line actually sets a megabyte (or two megabytes in Unicode?) of memory aside for that one stringbuilder?
Write Content Of Stringbuilder To A Textbox?
Apr 29, 2009I have a textbox in which i have to write content inside stringbuilder.Following is my stringbuilder.
Dim strString As New StringBuilder()
strString.AppendLine("<table>")
strString.AppendLine("<tr><td>")
[code].....
Using Substring - Remove "Left" And Use "Substring
Feb 3, 2011I am trying to remove VB6 type code and use VB.Net code, in particular, remove "Left" and use "Substring". This code does not do what the old style code does. It seams to ignore the first two chars and forces the msgbox prompt no matter what I type in the textbox (at "Leave").
Private Sub TextBox5_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox5.Leave
If TextBox5.Text = "" Then
'Do nothing
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Improving Function - Using Stringbuilder To Replace My Strings?
Jun 21, 2009vb.net
'strSearch = textBox.Text, columns 2 to 10 are the optional columns you want to search to. Function WhereQuery(ByVal strSearch As String, ByVal column1 As String, Optional ByVal column2 As String = "", Optional ByVal column3 As String = "", Optional ByVal column4 As String = "", Optional ByVal column5 As String = "", Optional ByVal column6 As String = "", Optional ByVal column7 As String = "",[code]..
sample output:
im also thinking on using stringbuilder to replace my strings.
Environment.NewLine And StringBuilder.AppendLine Are Incorrect?
Aug 3, 2010In Visual Studio 2010 Ultimate, a VB.NET WinForms project, I am getting incorrect values for Environment.NewLine and StringBuilder.AppendLine; look at the result in a hex editor, they are resolving to two spaces.
View 6 RepliesSave Stringbuilder Contents Into SQL DB Image Field?
Mar 25, 2011I've created and populated a stringbuilder for a csv file. Normally I write it directly to the response object for the user to download through the browser.However, now I want to save it to a SQL DB image field. Is there a direct way to stream it in?
View 3 Replies.net - Server Halts Due To Large StringBuilder Instance In Memory?
Aug 2, 2010So, I have this code that grabs a bunch of data from the database, and performs a bunch of calculations on that data. However, this is not what is causing the halt. The halt is coming in when I take all that "final" data that has been prepared, and go to write that into a text file.
Each line in the text file is being created from data that has had calculations performed on it. Each line "corresponds" to a record from the database. A user will have to perform this file export usually on about 30-40 thousand records at a time. Now, even though I am using a StringBuilder, this still halts because of the pure mass amount of records.
What I do currently in the code is create one StringBuilder, append all the data (after calcs) to it, convert it to a String, add it to a List(Of String) to be returned from the Function, and then clear the StringBuilder, and do the same for the next row, and I do this until each row has been created and appended, converted, and then inserted into the List.
Then, another class receives this List(Of String) and takes each String and eventually appends it to a file.
Does anyone have an idea of how to improve this code and make it so it doesn't halt the server every time? The reason it wasn't found out until now is because when I tested it locally I was testing it on only 1-50 records at a time.
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C# - Is It From A Sight Of Resources Reasonable To Use A StringBuilder Already To Concat Two Strings
Jul 9, 2010Is it from a sight of resources reasonable to use a StringBuilder already to concat two strings or is there a minimum concatenation operations that makes the StringBuilder efficient?
View 4 RepliesCreating A Loop In StringBuilder To Alter A Text File
Jul 2, 2010I would be grateful with some help with reading a text file into a Richtext box. The code I have at present appends the first line of text as I want it but the rest of the lines of text do not alter. I need a loop to read to the end of file and display in Richtext box. the code i have at present is this:-
[Code]...
Refactoring A Method To Replace Sql String With The Stringbuilder Class
Nov 3, 2010How do I refactor the method GetInvoiceNumbers to replace the SQL String concatenation with the StringBuilder class? Here is my code:
Private Function GetInvoiceNumbers() As System.Collections.Generic.List(Of Invoice) Implements InvoiceService.GetInvoiceNumbers
Dim invoiceList As New List(Of Invoice)
[Code].....
StringBuilder.Tostring Method Throws Exception As System Is Out Of Memory In 2.0
Jul 12, 2010I am using .net 2.0 and I am getting an exception of system is out of memory. My existing function takes datatable as input parameter which contains little bit large data (eg. more than 35000 rows) and in that function I am appending some xml node data and atlast I am returning the stringbuilder as a object.
[Code]...