Is 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?
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Would the world of strings be better if stringbuilder had IndexOf?
View 2 RepliesIs there any difference between & and + operators while concatenating string?if yes, then what is difference? And if No, then why below code generating exception?
Example:
Dim s, s1, t As String
Dim i As Integer
s1 = "Hello"
[code]....
vb.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.
I was currently looking at on old application that I am maintianing and it uses a mixture of retrieving Application config settings from both the App.config and application config table in the DB.In the new software I am working (a port of the old application) I have a list of email addresses that are static and rarely change, what would be the best mechanism for retrieving these. Currently I am using resource strings so that using them is a simple My.Resources., but what are the benefits/drawbacks of storing the information either in the App.Config or a database table.
View 3 RepliesI'm making a project for school with a group of classmates. It is an application that needs to reference quite a few pictures and strings from My.Resources. I don't know what the problem is but, whenever I run the program, I get a message that reads this: "There were several build errors. Would you like to continue and run the last successful build?"
And then below in the Output:
----- Build started: Project: Wilkes-Barre Virtual Scavenger hunt, Configuration: Debug x86 ------
COM Reference 'WMPLib' is the interop assembly for ActiveX control 'AxWMPLib' but was marked to be linked by the compiler with the /link flag. This COM reference will be treated as a reference and will not be linked.
[code]And the database is being updated.Is this a good use of a class for this really basic purpose?
View 5 RepliesThis is a continuation of this thread...
[URL]
So - is creating a DATAVIEW like this in a class doable? Then when the DATATABLE changes the DATAVIEW is always kept freshly updated?
Public Class caseBAL
Private _connection As New SqlConnection("Server=fps-lap-szsqlexpress; Initial Catalog=Casefiles; Integrated Security=SSPI")
[code]....
I've been pulling my hair for three days trying to figure out what has gone wrong in what little code I have in my first attempt at both the minimax algorithm, and recursive calls in general (I'm relatively new to programming). Basically, I have everything working in the application except for the thing I wanted to actually learn and work on in it: The minimax algorithm. Basically, whenever a player makes a move, the computer will do one of two things:
If there is a winning move right next to it, it will use that move. Easy as pie.
However, if this move isn't in direct sight, it will pick whatever move lets the player win. The exact opposite of what it should be doing. I know it's not coming from:
[Code]....
I just looking how to use LINQ for grouping a list.
Class Item
Public col1 As String
Public col2 As String
Public col3 As String
Public description As String
[Code]...
Using VB.net and the following LINQ statement. I suspect the "Order by" does not work with Concat(). I want to list the current item the user has and then list more available items in asending order. So first i select the current item from the db and then select the next available items in order. LINQ is ignoring the order by statement and sorting by the PK (which is itemID) I examined the list immediately after executing the statement. When I break up the statement and do them separately they work as predicted.
(From items In myDatabase.ItemAssignments _
Where items.BuildingID = buildingID _
And items.ResidentID = ResidentID _
[Code].....
How do I concat combo box data. E.g. value in combo box 1 is "L1" and value in combobox 2 is "03". How do I combine them together into L103? Part of the code looks like this. I am trying to combine two combo box values into one single string and save it in my database. I tried to run the program, but when I click the save button, nothing happen. And I look into my database, no data being added.
Dim strInsert, psID As String
psID = cboLevel.Text & cboLNumber.Text
strInsert = "INSERT INTO
[Code] ....
Say I have a List(Of Tag) with Tag being an object. One member of Tag, Tag.Description, is a string, and I want to make a comma-separated concatenation of the Description members.Is there an easier way to do this than to read the Description members into a List(Of String) and then use the Join function?
View 2 Repliesi'm unable to debug my project that i made. i save it and everything, but it just won't playit says Warning 1 Could not find type 'WindowsApplication1.My.Resources.Resources, Time table'. Please make sure that the assembly that contains this type is referenced. If this type is a part of your development project, make sure that the project has been successfully built. C:SchoolIPTTime table, using 2 loopsTime table, using 2 loopsForm1.Designer.vb 123 0 now when i open it up and try to debug it , it comes up with an error, i even try referencing it but it does nothing ,
View 2 RepliesI'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 Repliesi'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.
I'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].....
I 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.
I want to keep away from string object. I have a stringbuilder object, and I want to know if it contains 'Firefox'.
View 6 RepliesI 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?
[Code]...
I'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].....
do you also have to use StringBuilder when declaring a String like this?:
View 11 RepliesThe following is ment to generate the path to a text file and stream the data found there into an array.
Dim y1 As String
Dim y2 As String
Dim y3 As String
[code].....
StringBuilder 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 RepliesHow can I check if a StringBuilder contains a certain character or string? There is no Contains method like the string class has.
View 8 RepliesSuppose a stringbuilder is delimited by tab, I want to convert it to a matrix. How to do it?
View 3 RepliesI'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?
I 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].....
In 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 RepliesI'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?
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