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?
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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
how can VB.net validates the format of each cell on the excel file that it opens, for example, the first row should only be numeric, or cannot be null, is it possible that vb.net can check it before it inserts it in the dataset or data table?
View 4 RepliesI'm trying to validate an IP address in dot decimal format e.g. 127.55.21.1
System.Net.IPAddress.TryParse(IP, Nothing)
This though returns numbers like "500" or "9" as valid. Why does it do this? Do I have to set the IP address version, if so how would I do this?
I want to validate text taken from a textbox and want it in a specific format. I have tried masked text box but when the textbox is empty it shows something like a blank line in the text box....How can i avoid that and show the masked textbox just like a simple empty (still masked) textbox?Secondly I want data like csc-(somenumber).....Can I add some random number automatically after 'csc-' characters?
View 2 RepliesHow to validate the Date format "MM-yyyy" irrespective of the culture datetimeformat
View 2 RepliesI need to validate user input in some fields, where these are defining how to show time in some views.
Requirements: Time format must be expressed in Microsoft .NET way (check this MSDN Library article if you want to learn more about framework's date and time formatting: [URL]. Keep in mind I'm looking to validate the format instead of an actual time string.
For example, user may input:
HH:mm
hh:mm
ss
hh:ss
mm:ss
... and so on.
In fact, it should validate from the shortest to longest time format available. Another point is I need to do it in client-side using JavaScript. In other words, any given regular expression by you should work in browsers JavaScript regular expressions' engine. I can't use ASP.NET validation engine, or any other. Because of project's requirements, I need to avoid that.
I would like to easily validate dates in this format, e.g., 31-JUL-2010 and only this format. Any other format should be considered invalid.
View 3 RepliesI wonder how I can validate that the GPS coordinates are inserted in the right format.
Like 38.722617
What is the preferred and hopefully the corrrect way to validate a masked text box set to a short date format?
View 10 Repliesvar queryString = string.Format("filename={0}&filestream={1}&append={2)", fileName, Convert.ToBase64String(b, 0, bytesRead).ToString(), 1);
above line of code giving error 'Input string was not in a correct format.'
I have a function that is getting passed a String and a DataRow.The String is a custom formatter. The idea is to do this
String.Format(passed_in_String, DataRow("ColumnINeed"))
The reason this is being done is at this point we have no idea what the column contains.However, if the formatter is "{0:MM/dd/yyyy}" and the DataRow("ColumnINeed") is an integer containing 42, String.Format is returning: MM/dd/yyyy In this situation I need it to throw an exception instead of returning nonsense.Is there anyway to make String.Format throw an exception if the object does not match what the format string is expecting?
i try to make a regular expression format to validate phone number at this format: (555) 555-5555 Dim IsPhoneValid As New System.Text.RegularExpressions.Regex("^/([0-9]{3}/)*[0-9]{3}*[0-9]{4}$")
View 3 RepliesIn Visual studio 2005 using VB, I've just started using a masked textbox to input time in the 24hr format.In the Input dialog box , I've set the mask to : Time(European/Military) and checked the : Use validating Type box.[code]Problem: The user can enter numbers which do not match the time format.Example:25:75 or 23:66 , etcI would just like to restrict user input to the numbers required for the 24hr format only.Also, if anyone can provide me with a link to some working examples of masked textboxes.
View 6 RepliesI need a regular expression that can validate that a string is an alphanumeric comma delimited string.
Examples:
123, 4A67, GGG, 767 would be valid.
12333, 78787&*, GH778 would be invalid
fghkjhfdg8797< would be invalid
This is what I have so far, but isn't quite right: ^(?=.*[a-zA-Z0-9][,]).*$
So I need a format string to pass to String.Format that would "move" the decimal point.I can't perform any math operations before doing the String.Format, so it has to work right off the bat.Basically I'm emulating a formatting string from a proprietary server. In it if I say:
"MR2"
for the value:
12345
The result is:
123.45
I'm close with this, but it's not spot on:
String.Format("{0:#0.##}", 12345)
an extra, but not necessary... there is also MR2Z, which moves the decimal 2 left, but if the value is 0 "" is returned.
however, i'm copying this directly from the book in its example format and still getting an error.
FormatException was unhandled
Input String was not in correct format
Public Class Form1
[Code].....
I need to take a string formatted like '010711' (DDMMYY) and put it into format '01-Jul-11'. Ive thought about doing something like string.toArray and then having some conditionals that format from there but am looking for an easier way.
View 5 RepliesI 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.
View 7 Repliesis 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.
View 2 RepliesI 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?
[Code].....
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 want to format the Timespan to have format like this 49 hr 34 mn 20 sec
I used the String format below :
String.Format("{0:00}:{1:00}:{2:00}", theTimeSpan.TotalHours, theTimeSpan.Minutes, theTimeSpan.Seconds)
It formats the Timespan to this format 49:34:20. How can I add hr mn sec to the String.Format above? or there's another easy way?
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
[Code]...
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
View 1 RepliesI need to be abble to validate user input in VB, where the user writes 5 numbers like this "### ##", 3 numbers, a gap and 2 more numbers.
View 3 Repliesi 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
View 4 RepliesI 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?
View 4 Repliesis 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
I'm trying to figure out a way to validate the user data entered:
[Code]...
This is in MVC3, VB.net. I'm looking for an easy way to validate a users input data into the editorfor field.
