Validate That A String Passing Through Always = "*.extension"
Oct 14, 2010
I wish I had never let go of my old pearl days, but those days are behind us Now, for the life of me, I can't remember how to write the regex I need I keep getting "TOO MUCH" validation!
the expression i have so far is: "(.*?).(jpg|jpeg|gif|doc|pdf)$"
but i know tis a little off for what I need What i need is to validate that a string passing through always = "*.extension"For instance, somehow, some strange way, user passes string as "bob.pdf"I want to convert the "bob.pdf" to "*.pdf"Or, say they just pass "jpg", then it needs to become "*.jpg"
Of course there is a billion other ways to do this, but none I can think of that would be less proc intensive than using regex I just can't remember the danged line I NEED!the ultimate goal in end of course is to set up:
I am using Vb.NET2008 to develop Window Application. When the user enter the File Name on the textbox, I need to check the file name to ensure that it has the File Extension. (Eg. Sales.XLS) I have not done the coding before and stuggling with it.
I just want to know how can vb.net validate the format of a certain string for example, i have a string with 2011/13/02, and I want to check if it's format is in yyyy-dd-MM format,. how can this be done?
I have large lists of account numbers in an array to validate. They have distinct patterns of characters so ve decided RegEx is the best method. As it is I loop through every element and match. Is there a better way? I saw they Array.TrueForAll Generic Method but after messing with it a bit it seemed that I would have to write a separate function negating the benefit.
is my string that return the value, dim strID as string="2343-dsds3-65gff".if the values in all the strID are zero,i.e.,strID as string="0000-00000-00000". i want to display error.
I have a form that a user inputs either A B C or D into a text box. I need to validate that one of those four letters has been entered in the text box. I am using a case statement but I think an array might work better but I can't figure out how to validate a string in an array. Or if there is a better way to use the case statement...Here is my code snippet This works, but it seems like it is the long way to do it. Also as soon as I click OK on the message box it immediatly goes and shows my next form. How do I get it validate, let the user redo, and then bring up the other form?
I want to validate xml against XSD (VB.NET). My function look like this:
Private Function ValidateXML(ByVal xml As MemoryStream, ByVal xsd As String) As ArrayList End Function
How can I do the validation when my xml is a memorystream/stream (I use stream because I don't need to store the xml) and my xsd is a string (I get my xsd from a web servise as a string, and I do not need to store it in a file)?
I'm developing a VB Web Application in .NET3.5 using Visual Studio 2008. I'm having difficulty in validating some XML as a string before I add it to a HTML form to post to a 3rd party. I have an XML schema file from the 3rd party to validate against and at this point I'd like the application to perform the validation before each post.
After searching I've found references to a XmlValidatingReader but this is obsolete and I'm having difficulty finding another way to do it. Also all the good examples are in C# - for now I'm stuck with VB. This is what I have so far which I'm looking for with! Public Function ValidateXML(ByVal strXML As String) As Boolean
I would like to check the format of a string value (contained in a variable) before using it in further code.
- It must be 8 characters in length (no more, no less) - It must be in the following format: 2 digits + 1 letter + 5 digits
I imagine the VB.NET code would be something along the lines of:If CStr(strMediaNum) (...not in the form [2 digits + 1 letter + 5 digits]...) Or (...datalength not equal to eight characters...) Then Exit Sub EndIf
works very well. So seems some consistency miss of the string constant behavior.
2) Have a look on the COMMENTS (in the attached picture). The words "custom", "string" and "error" are highlighted, however they are in the comments, so should be green, not blue.
Why this? What workaround? EDIT: Declared as "bug" in Microsoft Connect (even if is not more that a syntactic "miss")... EDIT 2: As remarked Hans Passant, standard string methods, like "cucu".Trim() does not work either.
codes one that validates that user will enter only uppercase letters in a textbox and no numbers and symbols. The second one should validate user only enters string no symbols and the third should only accept string and symbol
I am a newbie programmer. I have some code that needs to open a file based on what is contained in a variable. Example: If File.Exists(w) Then Dim q() As String = IO.File.ReadAllLines(w)
The problem is that I need the variable "w" , after readallLines , to have a .txt extension. I tried this:
IO.File.ReadAllLines(w & ".txt") but that doesnt work.
i am using an input box. the input should be an integer. if the input contains a "." then i want to display an error. if number is integer then do some code. i am trying to use somthing like this strInput = nputbox.... If strInput.contains(".") then messagebox show. Sometimes the answer is so blindingly obvious i fail to see it. Sdog
I am using this regex string in one of my programs to validate email adresses: "^[a-z0-9._%+-]+@[a-z0-9.-]+.[a-z]{2,4}$". This works well for the most part, but I just found out that it doesn't catch an address like this ... "john.doe.@yahoo.com" ... where there's a "." right before the "@", which is invalid, so my program tries to send it & throws an exception. How to modify my regex string to catch this situation?
is there any function to validate if a string has only numerical characters? I can cross character for character and verify if it is a number. But I look for something simpler or if already a function like that exists.
I cannot use IsNumeric or IsDigit because it returns numbers to True with point or comma.
I need only numeric characters (no comma nor points
Good Evening! I am attempting to write a code so that someone can enter characters into a text box and then press a button which will validate the string and then count the number of uppercase letters in the displayed text. I also have a button that will allow lowercase tabulation. However I cannot get either to work or display in the associated text boxes.
Why would I use an extension method instead of just creating non-extension sub or function?
For ex, I could have an extension function called IsNullOrEmptyOrAllSpaces on String, which does a check as its name implies. Or I can write a stand alone function that does the same thing. Other than having the extension show up in Intellisense, is there any advantage? Is a call to the extension quicker/more efficient than a call to a regular function?
I have a question regarding calling a C++ dll from vb.net.My C++ dll has a function that takes char **data (2D char array) as a parameter like this for example.
But the result of this is that the textbox txtTags will only contain C and doesnt have the ++. I tried [URL]and the # is missing as well. But if I look at the address bar these values are there....
I have a simple query but I am just not able to get it right. Have a look at my sample code below:
Sub Function1 My Code Here Function2(Year,Month) End Sub Sub Function2(Year,Month) Dim Str as String() for 1 to 30 Dim MyDate As New Date(Year, Month, i) Str = MyDate.DayOfWeek.ToString() Next Return Str End Sub
I'm sure you've all seen this a lot before (in a variety of forms) but I think (hope) it's a bit different. <Not actual names of variables>I have two forms (form1 and form2). Form1 has 2 class-level variables, a string (m_String) and a collection(colCollection).Inside form1, the collection is loaded using a key. With an if-statement, the collection is matched to input (from a combobox) through the matching key.The chosen string from the collection is then passed to the m_String (confirmed with MessageBox.Show(m_String)
I'm calling unmanaged C++ Dll function from VB.Net project by usin dllimport attribute like this;
<DllImport("Injection.dll", CallingConvention:=CallingConvention.Cdecl)> _ Private Shared Sub Injector(ByRef Client As String, ByRef Dll As String) End Sub
I'm trying to establish a connection to my SqlDatabase while getting the connection string from a function. This will eventually lead to dealing with the appconfig file, but for now I'm just getting the basics established.
Imports System.Data.SqlClient Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
