It's just before while I found that expression (see my signature) is possible, so this request is not about what 'I am missing', but what I can think of. It would be nice to have named sections of code in visualbasic, which would replaced almost everything you can miss about GoTo. Imagine this:
Section Compression
For Each item ...
If Not item IsV...
[code]....
how to use them then before, but am still a little confused with a few aspects. Here goes:
1.) Lets say you have a method that checks for a certain condition(s) and if it fails Throws an exception. Does it have to be in a try/catch block? Meaning can the "Throw" statement exist in a block with no try/catch statement?
2.) Now lets say we have a method that has a try catch block and in it there is a throw statement. When the throw statement is executed does it first try to find an appropriate catch block in the same method or does it immediately go back to the calling method without looking at the catch statements in the current method where the exception was thrown?
3.) I created a custom exception class that inherits from ApplicationException. Next I created a method which has a catch block that catches this type of exception and does some action. Is the System(i.e CLR) smart enough to throw an exception of this type, or does it only throw exceptions from SystemException?
4.) I know that some people are more liberal in their use of exceptions and others use it more sparingly when truly strange stuff happen like the DB going down. I am writing code where I am getting some info back from the database, converting it and then storing it. Sometimes there might be data that comes back from the database and other times the field is empty and the Null value comes back. Therefore in the instances where Null comes back from the database I should not convert the value to anything, since I will get an error. What should I do in this situation? Should I let the CLR throw the exception when it goes to convert the Null value or should I check for the Null value and if it exists not convert?
5.) In general when I throw exceptions, is it sensible to only throw exceptions of the type Application Exception or are there instances where the programmer throws exceptions of the type SystemException?
Studying Ruby and the Do block. Coming from much c# I didn't see much that reminded me of Do, but then VB came to mind with the With statement and one which I wish was in c# (maybe it is and I never saw it?). The two statements, Do and With, appear similar.Is the With statement in VB the same as a Do block in Ruby? [code]I understand what I will get just from looking at it. I know that I will get a new record in my database with the above information, but I do not know why. Why did book become TheBook.new?
View 5 RepliesI'm relatively new with LINQ, but I'm going to be getting into it a lot more. Is the following a practical application of LINQ, or is there a better way to do something like this? [code] I was thinking if I could get the property name somehow as an object I could just do one LINQ statement,
View 5 RepliesThere has been an Visual Studio addin created by Heslacher based on code by JohnWein which allows one to copy code in Visual Studio and paste it as HTML code block here in the forums.urls...
View 10 RepliesHow to comment multiple lines of code/block of code in VB?
View 5 RepliesI am creating an application that will compile code at runtime and then execute that code. My worry is this: Someone might make a malicious script, that deletes files for example. Is there an option in VB.NET that prevents Kill statements and other file operations from executing? Maybe a kind of 'security' feature? If not, is there another approach that I should take?
View 6 Repliesi saw this article on msdn forum about Request.UrlReferrer but didnt really understand it well. I need to use this property in one of my pages to see where the user is coming from. My case is if the user comes from certain page, i need to have an if condition and should open up a popup as well as redirect page to next page. if the Request.UrlReferrer is null then i dont need the popup, just goto next page. can somebody put a sample code snippet here?this is what i have so far -
Public ReadOnly Property URLReferrer() As uri
Get
End Get
End Property
i am not sure what to put with the Get and End Get.
I want to get a 48 byte block of assembly code from the memory, save that code in a global array or whatever, then I wanna NOP everything from 0xF to 0x16, and write that into the memory, and then later I wanna use the global block to set it back, how can this be achieved in VB.NET?
View 4 Repliesnow if i've written a code, and then wrote that if a certain condition presents then repeat that code again including that if condition, so what is the code for this?
View 3 RepliesI have a simple question on posting to this forum: what tag to use for a code block?
View 4 RepliesI was wondering, is their any way to change a string into a line of math code. I was working on a graphing calculator project and am having trouble splicing up everything into variables and coefficient and operators. Example, having this block of code work
[Code]...
I have a script file which uses code similar to the C# language, using { and } braces to start and close 'blocks' of code. Note that blocks can be nested.[code]...
Is it possible to use regular expressions to parse the code and return the name of each block separately? So in the above example, it should return block1, block2 and block3 but NOT "block 2 contains" or "and another" (no nested blocks).
'This program is to ask for input from a customer as to the type of lift ticket desired, whether it will be for a half 'day or full day and the total number of days desired. It will then calculate the total ticket price plus a slope 'charge of $10.00, a 10% sales tax will be added to the total of both the price and charge.'The checkboxes were designed to order one type of ticket at a time, when one box is clicked the 'other checkbox dissappears. Clicking the box again resets them both to visible.[code]
View 16 RepliesI'm trying to replace text using this method:
Add each characted to a String list (List(Of String)), execute the replace function for every type of character (for example: Text = Text.Replace("A", "0AA") Text = Text.Replace("a", "1AB")), but there's a problem: it replaces the text, but it replaces those replaced characters too, so when I replace "A", it will result something like this: "0AAB AAA 0AB"... (a long text)), and then add the characters to the result string
how make the application stop and start the replacing of the next character
I'm trying to use this code block:
Dim ReturnedString As String = GivenText
Dim ListToEncode As New List(Of String)
Dim curr As Integer = 0
[Code].....
I'm wondering, is there a utility out there that will let us select a block of code and be able to replace it?
If there is none then I would want an idea on how can this be done so I could make a small utility for this task.
I have a block of code in an application I have written. I have tried two different variations.Below are examples of the method I used: [code]
The second example adds only three more lines of code. Yet, the app would run at about 10% of the speed as it would in the first sample.
I have this block of code that splits txt/csv files. It is working just fine but its a but "ghetto"
[Code]...
I'm writing something that will examine a function and rewrite that function in another language so basically if inside my function F1, i have this line of code var x=a.b(1) how do i break up the function body into symbols or "tokens"?I've searched around and thought that stuff in System.Reflection.MethodInfo.GetMethodBody would do the trick however that class doesn't seem to be able to have the capabilities to do what i want..dit 2:basically what I'm trying to do is to write a program in c#/vb and when i hit F5 a serializer function will (use reflection and) take the entire program (all the classes in that program) and serialize it into a single javascript file. of course javascript doesn't have the .net library so basically the C#/VB program will limit its use of classes to the .js library (which is a library written in c#/vb emulating the framework of javascript objects)
View 4 RepliesThis seems really simple, but for some reason Im stumped.Im dynamically generating an HTML Select Box, lets call it myselect. Im creating this select box based on some database values Im generating an HTML Select Box.. almost like a string that Im just spitting out to the page. So it's never a control in the codebehind, just part of a string thats rendered as HTML by the browser. If I submit my form, and in my codebehind I perform:
Dim myVal as String = Request.Form("myselect")
That code will give me the VALUE of the myselect select box. How can I refer to this control to cast it as a System.Web.UI.HtmlControls.HtmlSelect control? Request.Form seems to give me the value, but I want to reference the object itself..
I am using the given code to copy my database files...it works like a charm in debug mode but as soon as I create a setup, it stops working. The error is
"Database Detach Failed"
I tried checking the code line by line and found that the code does not enter the IF block.I have no idea why.
Public Sub bk()
Try
Dim strDatabasePath As String = My.Computer.FileSystem.CombinePath(My.Application.Info.DirectoryPath, "LIC.mdf")[code].....
Well, I've read (and learned) that the finally block doesn't always execute its code (even apart from pulling the plug).FYI For more information, see try catch finally question
[Code]...
I have an interface that I've defined and am working through a bunch classes that will implement it. I'm noticing that in 95% of the implementations, I'm only changing a few lines of the code, so I'd like to know if it's possible to have my IDE generate a block of code inside of a method upon implementation, much the same as implementing IDisposable.not mark my posts as answered. It is extremely rude. You have no idea if you've answered my question.I WILL come back and mark the ones that are answers, as answers.
View 7 Repliesi am using vb2008: now i can find the parent window with this block of code
Private Sub Button11_Click_2(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click
Dim theHandle As IntPtr
theHandle = FindWindow(Nothing, TextBox9.Text)
[code]....
i do know how to use sendkeys, but if i use that and click on something else while i send the keys it picks up that window and trys to send the keys there thats what i dont wantnow using the top block of code along with this module how can i get the childwindow with focus on the "Richcntl" box to send text to itin a diffent click button:in this block:
Private Sub Button13_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button13.Click
End Sub
Does anyone know the code to address Logical Block 0 of a disk? This is my dump of block 0 of a multipartition disk.
[Code]....
Is it possible to skip a code block when a synclock is active?
For instance:
A object of class Bicycle is used by thread 1 and has a synclock on it.
Then thread 2 comes along and needs to know if the lights of the bike are working. But if there is a synclock active then thread 2 just forgets about checking the lights and goes to make a delicious chocolate pie.
I minimize a block of code, and instead of the text inside the rectangle being "..." I need to write smth of my own. I knew how to do it some long time ago, but I've forgotten it now.
View 6 RepliesI'm creating some software in visual basic 2005 .Net. My software keeps a log file. If the applications encounters an error, it writes to this log file. Is there a way I can easily produce what sub, function, or block of code that produced the error?
Example:
Sub MessageUser()
Try
msbox("Hello")
[code]....
Since msgbox is spelled incorrectly this will produce an error. I want to know what sub caused the error, in this case MessageUser.
I have a form that I have been getting submissions that have punctuation and special characters that trigger the potentially dangerous Request.Form value error. I have been trying use the httpUtility.htmlencode and Server.htmlencode method to sanitize textboxes and textareas.All my tests do not fire because the built-in request validation of the 4.0 framework prevents the code-behind from executing to perform the sanitization. I have included the ValidateRequest in the page header but no matter what I set it too it still does the same thing.
This is the code I have so far.
Session("RequestID") = Server.HtmlEncode(txtRequestID.Value)
Session("FirstName") = Server.HtmlEncode(txtInstFirstName.Text)
Session("LastName") = Server.HtmlEncode(txtInstLastName.Text)
[code]....
What can I do to make this work? According to all the websites I have visited it should work.
Is there a more elegant way to structure the following code, which takes a comma delimited string containing certain values in specific positions and assigns the values to the properties of an object?[code]...
View 5 Replies
