I need to create a function named isValid to validate some criteria, text length character content. have validated length but i need to validate at least one Uppercase letter and one number is used(minimum) i was thinking of using a loop to check each character individually. thats probablly where i go wrong i, i often convolute the simple and keep heading of track.
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I've been asked to validate the content of a text box to make sure it's only alphanumeric.Now I have 2 question on this from you experts:
1. alphanumeric value needs to start with alpha or it can start with numbers also?
2. I wrote the following code to test my entry but it's somewhere wrong I cannot understand! How can I go through each character to make sure it's alphanumeric?
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I am working on a VB.NET windows applications. It reads data from a text file and inserts them into SQL server DB using SQL Bulk copy.I want to validate the length of all the fields in the file. The maximum length allowed for evey field is stored in tbFieldLength table. File has 50 columns and 10,000 rows and the values are separated by '|' symbol.
If the length of a value in any row is greater than the length specified in the tbFieldLength table, I want throw an error with exact row and column details. For example,saying
"Lenght of the value in Row 6, Column 20 is greater than the expected length"Also, I want to identify all the places if the error occurs in multiple locations. What is the best way to validate the length of fields in the text file?
1)This is my code.. (below)what i am trying to do here is to insert username and confirmed password into a sql table called login via a pre created form.I have 1 textbox, 2 Maskedtextboxes and a button.
what i would like is if the passwords do not match in both maskedtextboxes for the system to throw out a message saying passwords do not match please try again..which then clears previous content and requires the user to enter details again. once details are correct and system commits the new user details to the table and throws up a confirmation message.
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I have a field displaying on a datagrid that the user has asked to be variable length based on the data that is returned. Is there an easy way to determine how many characters are returned for a field and then converting that to a pixel length so that I can change the length of the field in the code.
View 2 RepliesI am trying to error check a piece of code
This is from my previous thread which 'Codeoder' help me on..
[URL]
I have a RTB which I import with a set of 7 or 9 didit numbers, 7 for Staff and 9 for Students. e.g. Staff numbers
0628189
0628191
0629991
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Here is the code I am trying to get to work:[code]I have managed to check for null. it is just the length check that I am have difficulty with.
View 12 RepliesI'm writing a small program that loads a folders contained file names into a list box, you then double click one of the file names listed and it appears within the programs text area where the user may freely edit it. I then have given the users options to export the data contained within the text box to a word template. What I'd like to do is add a button which the user can click in order to strip away all the html within the text areas content. I found a solution but for some reason I can't make it work. There are no errors displaying nor does the program crash out, it simply isn't doing what it should be doing.
The function I'm using is below:
Function stripHTML(ByVal strHTML)
'Strips the HTML tags from strHTML using split and join
'Ensure that strHTML contains something
If len(strHTML) = 0 Then
stripHTML = strHTML
[Code] .....
I've used the below snippet in an attempt to put the function to work in the text box.
Private Sub btnHTMLstrip_click()
' calls function stripHTML, applies to text box
richTxtBox.Text = stripHTML(richTxtBox.Text)
End Sub
So, its not working as it should?
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
I have a problem with unicode character, as i create a database in SQL Server 2005. I want to query from a table that criteria fields are contain unicode character i.e NVARCHAR.
e.g: SELECT * FROM tblMyTable WHERE MyField='ភាសាខ្មែរ'. But when i did like this all rows that contain Unicode Character always display. it doesn't fit to my criteria
Since my last thread hasn't been answered and I simply cannot wait until it gets answered, how can I validade what is being written on a textbox?
I need to know when the user types a "-" (minus) char. And when he do so, an message appears (preferably an ballon or a tooltip) and says that is illegal to type this char in particular.
When I try this code, Content Length is always -1.
Dim Request As HttpWebRequest = DirectCast(WebRequest.Create("http://www.google.com"), HttpWebRequest)
Dim Response As HttpWebResponse = Request.GetResponse()
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Does Visual Basic have a function to switch between HTML character entities and plain text natively?
EG. > < to > <
I am trying to validate the character within a textbox. The textbox has a MaxLenght of 1
Private Sub textbox1_TextChanged() Handles textbox1.TextChanged
If allowed_characters.Contains(textbox1.Text) = True Then
textbox2.Focus()
End If
If allowed_characters.Contains(textbox1.Text) = False Then
textbox_userid_input01.Clear()
End If
End Sub
When I enter something in textbox1 at the debug it will do the if contain = false
but the if contain = true doesn't work. I tried a lot, but it still doesn't recognize true.
I'm reviewing some legacy code and I've found a bug that causes the response to sit indefinitely.[code]The problem is that someStoredLength is much larger than the actual size of someByteArray, so the client just sits there waiting for the file download while the browser just spins.I'm contemplating just removing the AddHeader that specifies the content length, because when I do that everything seems to work fine, but I'm worried that I'm not understanding something.Is it ok for me to remove this AddHeader or should I figure out a better way to deal with this problem?
View 2 RepliesI 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
In vb2008 is possible validating textbox for letter character only?
View 2 RepliesI'm working on an uploader built with an HttpHandler. I would like to create a routine to handle all uncaught errors including content length error.
CODE:
It's critical that I handle any 404.13 (request exceeds request content length) error in the httphandler itself.
I would also like Page_Error to handle any uncaught exceptions but it never fires.
i am trying to build, or better edit, my own HTTP Post Request Source Code. The main purpose if it is working, and i receive the data successfully but when i try to put a progressbar with it, it starts getting sticky, because the ContentLength will always stay -1. [Code]
View 4 Replieshow can i get the illegal character in a string
for example
dim Strto_check as string = "1+2-2"
dim Listof_Illegalstrings = "~!@#$%^&*()_-+=-?/.,><|" ""
now i want a function to find out which is the invalid character available in the strto_check variable and then replace it with a standard place holder
I want to read a text file(.txt) character by character into a database.There are 28 characters on each line and I want to read the first 16 into a column in a database and the rest in another column in the database.
View 7 RepliesActually I am trying to get a function to validate all the textboxes in my form. At the moment, my code look like:
Private Sub Textbox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Textbox1.textchanged
If Textbox1.Text.Length = 0 Then
MsgBox("TextBox1 is empty. Please enter something", msgboxstyle.okonly)
Textbox1.Focus()
Endif
End Sub
I have to write the same line of code for each textbox to check if it is not empty and was thinking of using a function that will be called and check each textbox in my form.
i have problem in Delete special character from text
case: "Valid file extensions: {(asa , asmx , asp , aspx ,xlt ,zip)}"
i need delete marks " { } ( ) : , from text After process is:Valid file extensions asa asmx asp aspx xlt zip
I'm trying to read and load the content from the attached text file to a arraylist with the code bellow.
but what is happening is that not all the lines from the text file are loaded in to the arraylist, the reading jumps from one line to other in the text file.
Dim FILE_NAME As String = ((My.Application.Info.DirectoryPath).Substring(0, (My.Application.Info.DirectoryPath).LastIndexOf(""))) & " est.txt"
Dim lista_barras As New ArrayList
Dim lista_barras_esp As New ArrayList
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I keep getting a ProtocolViolationException "Bytes to be written to the stream exceed the Content-Length bytes size specified." on the following code.I've tried setting Content-Length numerous ways with no success.
Dim url = "https://domain.com"
Dim req As WebRequest = WebRequest.Create(url)
req.Method = "POST"
req.ContentType = "application/xml"
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The code below allows me to enter an integer in to the text boxes, but if I enter a decimal in any it throws an error. How do I validate decimal values in addition to integers?
Private Function numeric() As Boolean
'validate text boxes as numeric
Dim blnnumeric As Boolean = False
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My form has a texbox where user enters an ID. IDmust be4 chracters in length andof the form: begins with either "E" or "e" and the next 3 chracters cannot be "all characters".
Example:
E102 - corect
e3ff - correct
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I want to read a text file(.txt) character by character into a database.There are 28 characters on each line and I want to read the first 16 into a column in a database and the rest in another column in the database.
View 17 Replieswriting a function to validate that a user has entered their full name (so at least two names must exist in the textbox).
View 2 RepliesAs a non .net programmer I'm looking for the .net equivalent of the old vb function left(string, length). It was lazy in that it worked for any length string. As expected, left("foobar", 3) = "foo" while, most helpfully, left("f", 3) = "f".
In .net string.Substring(index, length) throws exceptions for everything out of range. In Java I always had the Apache-Commons lang.StringUtils handy. In Google I don't get very far searching for string functions.
Edit:@Noldorin - My first encounter, although it took me several seconds to do the same in c#:
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Note the static class and method as well as the this keyword. Yes, they are as simple to invoke as "foobar".Left(3). See also c# extensions on msdn.
