Asp.net - Find Out If The First Character Of A String Is A Number ?
Aug 25, 2009
How do I check to see if the first character of a string is a number in VB.NET? I know that the Java way of doing it is:
char c = string.charAt(0);
isDigit = (c >= '0' && c <= '9');
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Apr 20, 2010
I have an array like this:
Dim t1 as string=Textbox1.Text
Dim invalid as string()={";",".","""," ","'"}
I want to check that if a character in my array is in the text box then a message appear.
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Feb 24, 2010
How do I find last but one character in a vbstring
for e.g. In the string V1245-12V0 I want to return V
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Mar 29, 2010
I how do I find the last but one character in a string in VB.net.for e.g. I have a string Dim strTicket as string="56789-091F0"I want the value "F"
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May 13, 2010
I have an array like this:
[code...]
I want to check that if a character in my array is in the text box then a message appear.
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Jun 18, 2012
I have a string of text being sent through a serial port to a text box (Text1.Text). The string has some symbols in in which I am assuming are Hex values. The hex values are Hex(1), Hex(4), Hex(12), and Hex(17). What I need to do is find the position of these hex symbols in the string of text so that I can split or grab the data after the specific hex symbol. I am not able to use substring or indexof or instr ... or at least I am not using it correctly to find the appropriate symbol.I was thinking if I need to iterate through the string character by character and grab each symbol or text and get their value??? If it is one of the hex symbols, then get the index number (or position).
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Nov 13, 2011
I need to write a function to find the first non-repeating character in a string in VB.NET. Does the code below look ok?
Module Module2
Sub Main()
' Unit test
[code]....
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Feb 16, 2009
what is the vb.net equivalent to vb6 String(number,character?
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May 31, 2011
I'm scanning through all characters in a textbox. Then the program counts how many of each character is in the textbox. Here's the code which adds all characters to a list:
For each c as char in TxtBox
list.add(c)
Next
Everything's working fine, except this will also add returns to the list, which I don't want. I thought I could write like this:
If c <> chr(10) Then
list.add(c)
End If
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Nov 11, 2009
How can I count the amount of times a character appears in a string?
The assignment is to create a program with 2 text boxes, label, and a button. We then need to type a phrase into the first text box, and a character in the second. Then click the button and then the label will display the output of how many times the character in the second text box appears in the first.
I have all the above setup except for how to display the amount of times the character appears in the first text box, here's a picture:
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Jan 21, 2011
I want to user to enter only numbers and characters in textbox i.e no special charaters.I don't want to use key press event of textbox.As i need same validation in gridview.
So i want to validate whole string.
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Feb 18, 2012
I am trying to count the number of times a specific character is in a string. The problem is when I run the program the letter doesn't advance from "d" in the string "debugging" and doesn't display the number of time the character "g" is found.
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
Dim letterCount As Integer
[code].....
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Dec 1, 2010
How can I generate a 7-digit random number and special character string in a textbox on a button click event, in VB.Net?
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Feb 8, 2011
How to find the number for sentences in a String data ? Edit: Ok I came up with this after following Wipqozn's method
Dim str As String = "This . is . a . text."
Dim maxCount As Integer = str.Count
Dim intSent As Integer = 1
[code].....
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Sep 21, 2010
Is there a way to find ALL of a specified string from a multiple-line text and express their line number as integers?
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Sep 2, 2010
I may have a string for example potato in a vb.net application. I want to find all the occurrences of o and convert them to 0, so the desired out is: p0tat0.I know it can be done by the provided string operations but I need a regular expression in my scenario.
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Oct 1, 2011
This is what I have, but It doesn't work with strings for some reason (only text files):
[Code]...
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Dec 12, 2010
[Code]...
For each character of this string I want a new character out of the string and then remove the character from the list of characters that still maybe used for other characters. It may not get the same character, you could basically just call this encryption, but it's not what I am making. I don't want to waste my time doing this one hour while VB can do this for me in <1 second.
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Dec 25, 2010
If i have a line in a txt document "text.txt".Now what i want to do is open the file and read the contents.
When it find this "search.selectedEngine" term then it should delete that particular line and replace it with another string ("REPLACED STRING").
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Feb 17, 2011
I am writing a hangman type game and I am displaying the word to the user in a label as all *'s, but I cannot figure out how to have just one of the *'s changed in the label to the correct letter when the user inputs the correct letter into the text box and clicks the check letter button.Everything else in the program works perfectly, except for this part.[code]When I use the .Replace it changes all of the *'s to the correct selected letter.
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Feb 16, 2012
the coding is to 'Get input string and put its character into List, and replace the character with other.'but having problem putting each character into List and also replacing it,[code]
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Jun 13, 2010
I've been working with the substring command and after coding up all the things I needed it to do, I saw a post on here where the "For Each" statement was used basically to do the same thing.Lets say we just want to take a string apart one character at a time and add each character to a label. Which would be more efficient?I made a cheap example to show ...
Code:
ABinary = "0110 1100 0001 1011"
For x = 0 To Len(ABinary) - 1
[code].....
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Sep 22, 2009
I have read the file into the stream and I just want to know how to find the frequencies of each character, two characters, three characters and so on
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Oct 31, 2011
I am trying to develop a HANGMAN game and i need to implement a button where the user can click on it to "buy" letters. So, i designated 2 text boxes (one visible containing stars and another one not visible containing the word that should be guessed), and i wrote the following piece of code so that once the user presses the button any of the stars will turn to the correct letter. My question is, i found the index of "*" and removed it, and now i want to insert the corresponding char with this index (WordInLetters). How can i find what char is at index "index" in vb.net?
Private Sub picBuyLetters_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles picBuyLetters.Click
Dim index As Integer = txtWordinStars.Text.IndexOf("*")
[Code].....
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Jun 6, 2011
Is it possible that after you find a string, backup until you find a specific character and copy it?For example, I am looking for "bread". The text is milk8andbread. Would it be possible to start at bread, back up until eight, and just copy "andbread"?
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Mar 23, 2010
Currently i try this code but[code]...
but i want to allow only a-z character and 0-9 number. not allow any symbol
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Jun 21, 2010
I'm using vb.net and a DGV to open a access DB. On load im filtering out everything except what was created on the current date. [code]...
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May 27, 2010
i have a datagridview linked to a access DB that right now looks in the 5th column and counts the number of "c","o" (completed and open) but it gets the count from the entire data base. I am able to filter the ones for a certain day and view them on the grid but how to count the number of occurrences that are visible and not the ones that have been filtered out?
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Feb 29, 2012
Assuming that I am going to add new record. I use this function to generate the ID for the new record.
Public Function GetMax(ByVal strTable As String, ByVal strField As String) As Integer
Dim cmd1 As New SqlCommand
Dim conn As New SqlConnection(gStrConnection)
Dim no As Integer
Dim str1 As String
[Code] .....
It returns 1. How can I modify this to make it 20120001 wherein the first 4 number (2012) will depends on the year today.
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May 14, 2011
My issue is that some websites only allow say 15 characters maximum to be used to create a user name where other sites do not. Currently I have one text box on the screen and a button, and a web browser that navigates to two sites.Site #1 has a cap of 15 characters max to create a user nameSite #2 doesn't have any maximum amount of characters to use.I am wanting to know how I can enter lets say a 20 character username into the text box and have the code set a max of 15 characters for site one and nothing for site 2. I was thinking that this could be done when passing the information from the text box to the text box on the screen with something like
Textbox1.Text.value.length= maximum 15
Site #2:
Textbox1.Text
[code].....
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