I have the following code...
Const ToAddress As String = username.Text & "url..."
which sets to ToAddress to be used in on my Net.Mail.MailMessage that is to be created with the following constructor
Dim mm As New Net.Mail.MailMessage(username.Text, ToAddress)
which takes in a string and a constant string. But I get an error here[url]...
I'd like to understand why one type can't be converted to another type inside a constant expression.
View 13 RepliesI have declared some constants as double in a Class
[Code]....
I'm tryingto figure out how I can get the text box to display the value of the constant with the same name? i.e 1.54186 in the example given
I am developing an application which initially allows the user to browse and select a save location. The selected path is assigned to a public variable which is used with concatenation to crate folder for saving user input data. How can I change the path string to a constant so the user can run the program again without having to run setup routine unless they want to change the save location?
View 1 RepliesI have strMyColor = "Red".I would like to make lblMyLabel.BackColor to be red.Without using a variable the code would be this:
lblMyLabel.BackColor=Color.Red
I tried using the variable like this: lblMyLabel.backcolor="Color." & strMyColor
But the error is that a string can't be converted to System.Draw.Color. I understand that, as the string "Color.Red" is not the same as the VB constant Color.Red.Is there a way I can construct a valid vbConstant from a string?
Public Class Form1
Private
[code].....
I'm making a call to my DLL file (prototyping 30+ functions), and want to be able to switch between different versions of the DLL quickly while in development. Thus, i want to replace the literal string constant that follows the "Lib" key word, with a variable string constant. In case there's any confusion in my use of the jargon. I am currently able to do this:
[Code]...
I have the following line of code
Dim a As String = ""
And the Refactor suggests replacing the "" with String.Empty
It is a kind of Refactoring but why? Since I am a newbie in the future declarations of mine should I better use the String.Empty ?
suppose I have variables named A1, A2, A3 ... B1, B2, B3 ... Z97, Z98, Z99. I have a certain operation I want to do using each one in turn. I CAN write a line of code for every single variable, but this will get pretty tedious. I'd prefer it if I can make a function that takes the letter and the number as arguments. So, if it gets the arguments "E" and "10" it will perform the operation on variable E10. What is the syntax for this? say a simple operation such as: result = E10 * 3 Is the syntax any different if I use constants instead of variables?
View 3 RepliesI'd like to convert a string which contains a decimal number into string that contains the binary value, the octal and the hexadecimal value of that decimal number.Afterwards I also like to convert a string containing a binary, octal and hexd. number into a decimal string.Basically I'm looking for the functions:
dec2bin
dec2oct
dec2hex
bin2dec
oct2dec
hex2dec
I'd not prefer to rewrite a function, I'm sure the framework must have these functions already.
I am working in .Net 2010 framework 2.0 I want to place the constant string for a color property in form designer like GradientBeginColor = MyColor in form designer.
View 1 RepliesWhen developing ASP.NET websites (using VB.NET web forms) - a lot of my time is spend writing CSS files and they always seem to get messy (code duplication) and very long.
All I want to achieve is to be able to manipulate the CSS using VB.NET code in the following ways:
Use an integer variable to store my "golden" number 7 and use that for width, padding, margin etc where needed
Use string variables to store my "golden" hex color codes e.g. "#44C5F2" and use them for color, background-color, border-color etc. where needed Use an integer variable to set the height of an element and have four child elements each with height: mynum / 4
I just want to use basic VB.net number and string manipulation in order to create a CSS file on the fly.
I understand that the end product - the CSS file shouldn't change much - it should at most change on a daily basis otherwise caching couldn't be used.[code]...
I noticed that if I leave off the terminating double quote for a string constant in Visual Studio 2010, there is no error or even a warning, i.e.
Dim foo as String = "hi
However, the continuous integration tool we are using flags an error:
error BC30648: String constants must end with a double quote.
Is there some language rule in VB.Net that makes a terminating double quote optional "sometimes"? Is there some setting in Visual Studio that will make it flag this as an error, so I can avoid "breaking the build" in this way?
Whats the best way to convert a list(of string) to a string with the values seperated by ,
View 3 RepliesIs there any way to convert null terminated string to normal string.I mean I can easily make a program to find the location of vbnull but there has to be a built in function for that.
View 1 RepliesI need to convert a string array into a very long string with following requirement:
can not using any character escaping can not using XML can not using single character as separator (e.g. comma or space as separator)
how can i convert these datatypes: date to string and integer to string.Because it must be in a string datatype when I display it in a datetimepicker and textbox.
View 3 RepliesI have a multi-lined string message that needs to be added to the Resources.resx file of the project. Currently I'm achieving this some thing like this MessageBox(My.Resources.MyMsg1 & vbNewLine & My.Resources.MyMsg2 ). This works.However I'd like to have the entire message in one resource string rather than adding two resources strings to the Resources.resx file.I've tried using' but no luck..message displays as "My message.Rest of the message".I've also tried manually adding a new line in the Resources.resx file. ( by doing "My message.<Shift+Enter>Rest of the message" But message is adding an additional space before the message in the second line.
View 8 Replieshow I can convert an RTF String to a regulat text string. The rtf string has tons of formatting info, but all I need is the text in the string.
View 5 RepliesCurrently, I'm using the following code to pull info from the management class.
[code]...
I'm also pulling info from the bios, disk drives, video, etc. What I've noticed, is although it runs fine on my pc, it may error out on some pcs since it is hardware dependent.I'm having trouble implementing a check to find if it exists before I convert to a string and add it to my overall string.
I'm working on a mass text replacer program because I'm sick of all the 10-day trial ones out there that aren't very good.The entire program is basically finished (All easy stuff), but now I need to code the actual replace/delete stuff, which I'm stuck on because apparently the way I originally intended to do it is not possible.
The way it works is you load a text file (.txt, .cfg, .ini, .doc, etc.) which opens a StreamReader which writes all the data into a listbox. Then you pick whether you want to replace or delete a string. If you select replace, then you enter the string to search for and in another textbox you enter the string to replace it with.
The way I originally intended to do this was like this:
If o1.Text = "Replace" Then 'The option
Replace(txtfile, str1, a1) 'txtfile is the data, str1 is the string to find and a1 is the replacement
End If
The problem is, I believe this method requires txtfile, str1 and a1 to be strings, but they're all 1-dimensional string arrays, which cannot be converted to strings, or at least I don't know how to convert them.
A friend told me one way I could do this is to open both a StreamReader and StreamWriter and do the replace/delete line by line as they are entered into the memory and write them to a temporary file which is then copied over the original. I can do this kind of, but I still don't know the proper way of doing the actual replace code because the string to find and the string to replace with are still 1-dimensional string arrays rather than strings.
Dim namelist As List(Of String) = New List(Of String)
namelist.Add("Hi")
namelist.Add("Hello")
[code].....
I have a function that takes string array as input..I have a string to process from that function..
Dim str As String = "this is a string"
func(// How to pass str ?)
Public Function func(ByVal arr() As String)
[code]....
I have also tried :
func(str.ToArray) // Give error since it converts str to char array instead of String array.
To be able to sort a dictionary by value I'm using this code:
Dim idCurrentJobs As IDictionary(Of String, Int32) = New Dictionary(Of String, Int32)
'The string in the dictionary represents a jobname and the integer is a counter for how many jobs im currently are running in the application'
idCurrentJobs.Add("JobName1", 2)
[code]....
Value of type 'System.Func(Of String, String)' cannot be converted to 'System.Converter(Of String, String)
Why? They are both effectively a function pointer (or delegate?) to a function that accept a string and return a string.
I have this code:
Public Class Beryllium
Public Const AtomicNumber As Byte = 4
Public Const Symbol As String = "Be"
[Code]....
I want to make a list out of all the constants (AtomicNumber, Symbol, Name and AtomicMass). I want to make the list also a constant. When I run the code above, I get an error highlighting AtomicNumber (on line on which I commented on "This line"). I tried .ToString() and CStr() but I get errors on both. Maybe there is a different way to make these constants one string or list (must be public and have new lines)?
How would I go about dynamically declaring a constant? (It's value is dynamic, not the variable name)
View 5 RepliesI have a string of characters, but I would like to have a string of hexdecimal characters where the hexadecimal characters are converted by turning the original characters into integers and then those integers into hexadecimal characters. How do I do that?
View 3 RepliesCan I do anything more or less with IDictionary? How do these two collections differ?
View 5 Repliesmy code is :
[Code]...
The error is Value of type '1-dimensional array of string' cannot be converted to 'String'.