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
How to apply textbox blank validation on button click inside gridview in javascript?I have a gridview that contains 2 textboxes and a save button in each row.I want to validate the textboxes on corresponding save button click.
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)
I'm trying to make a notepad, but I can not get it to open files on start up.what i mean, example, I right click on a text file on my desktop and select open with and then my program(it opens the program with a blank textbox, it does not open the text file)I do not know the code for makin this come true
i'm just a begginer in using visual basic. i'm trying to add, subtract, multiply and divide two numbers. here is my code;[code]an error is occuring when i'm not putting any number on the textbox. now for the problem when i put a number to textbox1, and 0 to textbox2, there is also an error. It's because we can't divide a number to zero.
I have this code that is supposed to validate that the value a user enters into the textbox is a number and not blank, but it is displaying the error message even if the user enters a number.
Private Sub txtAnswer_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtAnswer.TextChanged If Not IsNumeric(txtAnswer.Text) And (txtAnswer.Text <> " ") Then MsgBox("Please enter a number! Try Again!") txtAnswer.Focus() Exit Sub End If End Sub
I just realized I already have another section that checks if the textbox is left blank, but I still need to check that it is numeric.
how do i set my initial value for textbox as blank. I tried to I load my textbox a data coming from my database but what my problem is that I need to set my default value for textbox as blank because everytime I load the forms the textbox will be filled immediately with data. This is how I bind my textbox and combobox after loading from database.
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
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?
I have a textbox and a copy button, when I publish the app and run it, it returns an error if there is nothing in the textbox. I know why its giving me the error, but is there a way to suppress the error? Make it copy nothing? I want to make my co-workers and my lifes a little easier.
Current Copy
Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button8.Click Clipboard.SetText(TextBox5.Text) End Sub
My 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
The 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
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
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]...
I'm using the ErrorProvider in VB.Net (2005) which is associated with a BindingSource that is bound to a custom object that I have created. This custom object contains a date field that has a "Date" data type that. I am using a "TextBox" to bind the date field in my form. My issue is, whenever the TextBox loses focus and is blank, "String not recognized as a valid DateTime" is displayed by the ErrorProvider and the focus can't be changed to any other control on the Form. It's good that the ErrorProvider validates entries on Date fields by default (I didn't set up my custom object to display this particular error for the date), but it should allow blank values. I want the user to be able to have a blank date with no error message displayed. How can this be done using a Date field bound to a TextBox?
I have a date field bound to a textbox. If I make any changes to the textbox, I get "stuck" in the field unless I put a valid date value. All I want to do is set the date textbox to blank and move on to the next field, but I can't. I am eternally "stuck" in the field unless I put a valid date value.
[url]..
I did several hours of research, but looks like there is really no solution to this problem... Is this true?
I 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]....
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?
OK, 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.
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:
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.
