First off, let me apologize for my wording. I'm a student programmer and code primarily in JAVA so my my lingo may be a little skewed.I have created a method to create text boxes in my program that all have the same properties (ie certain text, size, font, fore color, backcolor,etc.) that looks like this:
[Code]...
I have the following C# code. Here the validations are kept outside the class to satisfy Open - Closed Principle. This is working fine. But the challenge is - the validations are not generic. It is specific to employee class (E.g DateOfBirthRuleForEmployee). How do I make the validations generic for all objects (DateOfBirthRuleForAnyObject).
Note: Make Generic <==> Make Type-Independent
Note: I have NameLengthRuleForEmployee validation also. New validation may come in future.
class Program
{
static void Main(string[] args)
[code]....
I am creating a form for our new intranet and I need to have validation on a number of the fields.When I use the Visual Studio textbox it doesn't render the input out as I would have hoped.t adds large amounts of text to the value and name and most importantly it doesn'tclose the input with a forward slash - How do I get the text boxes to add this trailing forward slash and produce validating XHTML input fields?
View 2 Repliesi'm doing a project for school which requires me to make a fully functioning database program with validation. I'm done with almost everything except a few things and that includes the database, since i don't really know how to make validation rules and masked fields.It's possible i'm guessing to in forms and such but in datagrid view?
View 1 RepliesTry
If Me.CompanyNameTextBox.Text.Length = 0 Then
MessageBox.Show(
[Code]....
I have a form on an asp.net (VB) page which has 2 sections.
All of section 1 is always required, but section 2 is optional. However, if section 2 is started, then all fields are required.
I'm stuck as to the logic I need to create this validation.
Here's my code:
<form runat="server">
<div>
<asp:TextBox runat="server" ID="field1a" Text="Name" />
[Code].....
iam currently working on my uni project and i have encountered a problem with valadation section.My system displays a message telling the user to input any fields that they have missed out on, listing the name of the field. However as these IF functions are in order the user must input the data in the order of how it is in the code. for example if the "consweight" is inputed and the calculate button is pressed, it thinks that all valadation above it has occured, when those fields are still empty.
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I am trying to mkae sure that there has been 16 numeric digits entered into the masked textbox. If not show errror message and if so to call the fucnction ValidateLuhn. When calling Validate Luhn i want the program to tell me if the number entered is valid or invalid using the code in the function:
Private Function ValidateLuhn(ByVal value As String) As Boolean
Dim CheckSum As Integer = 0
Dim DoubleFlag As Boolean = (value.Length Mod 2 = 0)
[CODE]...
I had used this code to validate email id in textbox,but it is not working properly?
Dim Expression As New System.Text.RegularExpressions.Regex("^[a-zA-Z][w.-]*[a-zA-Z0-9]@[a-zA-Z0-9][w.-]*[a-zA-Z0-9].[a-zA-Z][a-zA-Z.]*[a-zA-Z]$")
If Expression.IsMatch(Textbox1.Text) Then
MsgBox("The email address is valid.")
Else
[code]....
I have a textbox which has some text on it and when the user will click on it,The problem is, as there is already a text on the textbox when the user will click will diappear to type his respective text, the program is saving the text written also. How to prevent that? All I want is to prevent the program saving a blank textbox and the text written on it?
View 4 RepliesMy question is the last code tag section above where the parameters are set for the input.If on the form there is a textbox that is required (on the db side to not allow nulls) how would you perform the validation before you tried to execute the update sql?Ex: say 'SerialNumberTextbox.Text' was empty or if you needed to have character constraints on what was typed like varchar(15) and they have 16 or more characters
View 7 RepliesThe problem i am having is after checking if the field is blank i want program to stop at that, right now it is going ahead and checking the username password also even though the field is blank and printing wrong username password. i am really new at this so please excuse the lack of knowledge
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I copied someone elses code and then changed it to suit my program.. however even when a valid email is entered is still says invalid email entry
Private Sub EmailTextBox_Validating(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles EmailTextBox.Validating
Dim temp As String
[code].....
read code below as soon as user lefts field blank he should get the mesage thats what i am creating but ofcorse this code creates a bug and i get that message once for first textbox then for second and this process continues till i stop the project app gets stucked between thease two textboxes?
Private
Sub fname_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles fname.LostFocus
If fname.Text = "" Then
[code]....
I'm trying to add Validation to a Silverlight 3.0 TextBox but cannot seem to find and example which is complete, and not missing functionality that makes it work, I have this property[code]...
View 2 RepliesI have to use basic methods to validate the data that's entered is acceptable. The chapter we are on only gets into checking if a value is =, >, < etc etc, but I want to check if a letter was entered where a number was expected, so I ended up
with this:
'Store user values
If Not IsNumeric(inputLoanAmount.Text) OrElse CDbl(inputLoanAmount.Text) < 0 _
OrElse Not Integer.TryParse(inputLoanTerm.Text, loanTerm) _[code]....
I want to validate email in text box through key press event.my code is as follows
[Code]....
it is not working, provide solutions....
on my form i have 2 text boxes. One email the other password. Her eis my code
Private Sub btnLog_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLog.Click
If String.IsNullOrEmpty(txtMail.Text) Then
'txtMail is empty
MessageBox.Show("Email is empty", "Error", MessageBoxButtons.OK, _
MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
[Code]...
How can i make this more efficient. So that txtMail checks for text first then @ then more text then .com or something? i,m sure you know what i mean.and textpassword is more then 2 or three chars?
How to enter the date in the masked text box and how to validate it
View 2 RepliesOK, so i was going to verify a MaskedTextBox on whether the number input was or was not 10 digits in length. If not 10 digits, obviously they didn't put in a full phone number.
The problem is, even though you have no digits the length is still 10 so you can't check if the user put in 10 digits or not and return an error? Anyone got any ideas on testing for a phone number?I've seen tons of examples on date verification, but none on phone number verification.
Is there any possibility that I can put this large chunk of code to a function so that I can call and verify the input without having to repeat the code for every textbox.keyPress event.
Here it is:
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
With e
If IsNumeric(.KeyChar) Or .KeyChar = "[" Or .KeyChar = "]" Or .KeyChar = ";" Or .KeyChar = ":" _
[Code] .....
I have one textbox basically the user is going to enter in a 9 digit number or letters. From there I want to have a buttonclick event that validates this against 2 columns in a MSSQL Database. First to check if the number exists, next to check if it is active or inactive.
There are about 27000 rows of numbers so my main question is what is the best approach to handling something like this.
Should I create a view and validate in the click event. Should I create a stored procedure in sql that takes an input parameter and call it in the click event.
I was also reading about storing the information in a dataset however with that many records i am assuming that is going to be a slow process.
I need to amend the code below to cater for only two Decimal places. Anyone know how i can do this?
[Code]....
I have a number of textboxes on a form, and I want them all to accept the ENTER key. When the ENTER key is pressed, I want it to trigger the validating event. I know it will look something like this:
Private Sub Textbox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Textbox1.KeyPress, Textbox2.Keypress
[Code].....
What code can I use to cause the validating event to fire? I'd prefer the focus to stay in the textbox.
Can I validate a texbox to have only True or false? You should enter True or false in the textbox.
View 3 Repliesis there any way of making a textbox only accept intergers and treat them as such when doing calculations.
View 5 RepliesWe have migrated our Vb6 application to VB.NET using a third party tool. Now we are in a process of Refactoring and introducing object oriented concepts in the application.
In VB6, we were using structures in many places. As a part of introducing object oriented programming,
1. is it a good idea of changing all Structures to Classes? or Is there a concept of "Generic Structure" similar to Generic collections, Generic classes?
2. Can some one guide me any source containing guide lines or best practices for applications that are migrated to VB.NET from VB6 and implementing object oriented programmaing.
I have created a custom validator for maximum characters for a multiline textbox in ASP.Net.Below is the code that I am using.
[Code]...
i tried something like this, it insert into the database even thought nric is wrong. So i want it to stop inserting the data into the database when the nric validation is wrong, however from what i do, the result is it still insert the name in....so where should change to allow it stop inserting until user change the value then can continue insert???
Protected Sub btnSubmit_Click(sender As Object, e As EventArgs) Handles btnSubmit.Click
register()
End Sub
[Code]....
Combobox, Textbox , NumericUpDown and MaskTextBox validation in VB?
View 2 Replies