Validating The Text Box?
May 18, 2010
-When adding a consignment, the system should generate the consignment number automatically in the format XY12-xAB, where x is a number that increases by 1 for each consignment AB is the Shipment Type (EA, SA or SF) and XY12 is the Office ID.I know how to validate it to be XY(digit)(digit) by using regular expression.
If Not Regex.IsMatch(txtShipConsignmentNumber.Text, "(?s)^(XY)d{2}$") Then
MsgBox("Please enter a valid Shipment Consignment Number e.g XY12")
txtShipConsignmentNumber.Select()
But not sure how to implement the other stuff required.
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Feb 23, 2011
I have a form that has a text box that I want to only allow users to enter a date and then a MessageBox.Show stating that their data was submitted when they press a submit button. I know that you can do this with a regular expression validation but I have no idea how to do this in Visual Basic. Can anyone offer how to do that?
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May 5, 2011
I have two text boxes on my form (Text Entries) How do I code either the button or the text boxes to ensure entries are made in them Regards
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Oct 10, 2009
how do I validate that only letters and spaces have been entered into a text box.
Here is a sample of my
Private Sub btnWrite_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnWrite.Click, mnuWrite.Click
If Not txtName.Text Like "[a-z][A-Z]" Then
MessageBox.Show("Please enter your name using letters and spaces", "Error")
txtName.SelectAll()
[code].....
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Jun 21, 2012
I am just adding validation into a new winform. I am using the validating and validated events, in conjunction with an error provider control.No problem with first validation (ie. if user enters more than 12 characters). Error is set in validating event, and error stays until user enters 12 or less characters. Validated event is then entered and error is reset to empty string.
However, there is a problem with the 2nd validation on same text box. The code checks for zero length in text box.. and sets error with provider. Watching in the debugger, this code is indeed invoked, and error is set ok. Then something weird happens, the validated event is (unexpectedly) fired, and the code there promptly resets the error. Why is the validated event fired when there is already an error set ? This seems like a .NET bug. Can anyone suggest another way of doing this, or say what I am doing wrong ?
[Code]...
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Jun 21, 2012
HStrange Issue Validating Empty Text Box in Winforms
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May 5, 2011
I am having a problem with validating multiple text boxes in using VB.net. I have all boxes validated to display errors if the calculate button is click and the boxes are blank and I have each individual text box to display an error message if the appropriate requirements (values) are not entered. The issue I am having, I don't want these errors to pop up when a user clicks the clear button to re-enter new values,in which this occurs on each box. Below is the code I have for validating each textbox. If a user clicks the clear button (in which clears all text boxes) I still have my errors displayed to them in which I don't want
Private Sub txtLoanAmount_TextChanged(sender As System.Object, e As System.EventArgs) Handles txtLoanAmount.TextChanged
If IsNumeric(Me.txtLoanAmount.Text) Then
[Code].....
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Sep 8, 2009
I'm working on a program to calculate Exp left until a title is available in game. I'm trying to validate that the user enters only numbers into the text box. Should s/he enter a letter I want my message box to show and then select the text that was incorrectly entered. My problem is in when the backspace key is hit it again shows the message. I believe it's in the TextChanged event but i'm not certain..
'Handles txtXP Box & Validates user input
'Converts over to a Double Number
'Provides Error Correction if anything other than #'s Used.
[code].....
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Apr 3, 2011
I have textbox on my form, the details are below:
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Aug 31, 2009
I'm searching an MS Access database on a text box entry but I want to validate it to make sure that its not empty and that it is equal to a value in the table, if it meets these requirements it displays the table contents
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Jan 13, 2010
I have an application that has more than 20 text boxes used as inputs(numeric) ( in a form with multiple tabs), and from these numeric inputs I calculate many parameters and display them in other text boxes.The question is how can I trigger an event that will run the calculation procedures each time any of the text boxes numeric values change?( with out having to make procedure for each text box validated eventIs there some thing like a common validation event for any entry in any text box?
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May 9, 2012
I am writing below code for validating compulsary field account no. in form.User's requirement is set focus back on field when error comes :
If txtAccountNo = "" Then
MessageBox.Show("Account no filed can't be left empty")
txtAccountNo.SetFocus
Exit Sub
End If
It's working properly. But suppose user don't want to fill form and exiting from application.Message box keep on appearing till user enters account no.
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May 19, 2011
I have a problem in that I have five text boxes pertaining to a customer/client, where there is a txtbox for each: Name; Address; City: State; Zipcode. Of course all the txtboxes are "" at initialization. I also have 2 combo boxes and a 2D array for prices which I have finally been able to understand the array logic. I have also been able to do my necessary calculations for.
My problem. The customer information is first to be validated as all being strings and not empty. The combo boxes I was able to get to tie to my 2 dimentional array and get good output and calculations for a finished product. I am just having problems with the error messages. Also I don't want summary totals unless the data is valid. In other words, the user must enter a complete address and make decisions about the two combo boxes, both of which are needed to use the price array. I will change the comboBoxes to represent dress sizes,"S" "M" "L" and "XL" and the other combobox to describe colorRedSatin or colorBlackBroadcloth with a two dollar difference in price between them. 'That would be similar enough to the problem I need to solve.
Basically I do not want any numbers to appear for price of the dress or addons to the dress unless all validation is complete. I do understand how the radio objects work for discounts and check boxes for accumulating accessories. The program should not give any totals untill the user has input all customer information and made decisions about input from combo boxes and selected calculate from menu. Right now it calculates and puts zeros in when choices are not made from the combo boxes by the user. It will include correct amounts for radio buttons and checkboxes if anything is entered. I need error messages for customer inputs and combo box inputs (if not selected from list of option in drop down for choices) (basically if nothing was put in a text box, the text box is empty. Of course the problem is the user must enter something in all 5 textboxes and not get multiple error messages in rapid succession to fix. We can't always count on our users putting in good data.. When I tried a Do While False with ORs I was getting endless looping. I could not get it to work because it will never execute because the control never passes back to the user.
I don't want to list a series of If/Thens becauser the user will see about 7 messages, where he/she only needs to be fed one at the time. I hope someone can give me some direction. I just need guidance on how to validate the text boxes and combo boxes. The code is analyzed with a "Calculate" on the menustrip. I would like for the calculation not to calculate and put outputs into the summery text boxes unless all textboxes are filled and combo boxes are valid for all the customer information and combo box choices for my two combo boxes describing what is needed for the order to calculate. There are also the radiobuttons and checkboxes, DIMs, Const, Variables, but not having problems with that part I have my indexing problems on the combo boxes worked out also, so I am not concerned about those now except for getting the error messages when I should. I hope that I have described my issues fully. I am using visual studio 8 with Windows 7
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Apr 2, 2008
Basically I have a routine that validates an XML document, here is the code:
[Code]...
If you look at the XSD file you'll see that the element ID is supposed to mandatory in that I have set minoccurs to 1. However when I run the code this doesn't seem to be flagged as an error. Also I get 20 errors like Could not find schema information for the element Employees etc.
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May 15, 2009
I'am using the NumericUpDown_Validating event to cancel mouse clicks on the up and down arrows of the control.The idea is that the NumericUpDown control will stop incrementing when the base of a form reaches the bottom of the screen. That works, however the textvalue keeps incrementing. Why does the text keep incrementing and how do I stop it?
Private Sub NumericUpDown5_Validating(ByVal sender As Object, ByVal e As .ComponentModel.CancelEventArgs) Handles NumericUpDown5.Validating
Dim y As Integer
[code]....
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Jan 12, 2009
I have a VB.Net program that manually sends email via the MS Exchange Server. When an email is sent it will always have at least 1 pdf file attached to it. After all the emails have been sent (which could be alot), the pdf files are moved to an archived directory.My problem that seems to be occurring is that some of the attachments are not being moved because they are "locked" by another process. I'm assuming this "other" process is the Exchange server handling the pdf attachment but I'm not positive about this.How can I check to see if the attachment was successfully depositied into the Exchange server?
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Apr 25, 2009
I'm throwing errors when I call this function before running my calculations:
Function CalcValidation() As Boolean
' Didn't want to leave something out, so I needed a validation to ensure that a selection
' had been made for each component.
[code]....
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Jul 18, 2009
what I want is the following:
1. I have this form: img1
2. I filled up this form navigating with the tab key. I reach the last cell of the datagridview (dgv): img2
3. now, when I press enter, a new row is adding to the dgv and the first cell of this row has the focus and the cursor is blinking: img3 (while pressing tabs in the dgv, the current cell is always in edit mode, I don't need to do an extra click, I can write immediatly)
4. but my problem is that when I press the left arrow key at the end of the first row, a new row is adding to the dgv in this case too: img4
5. that is what I want to prevent, but the navigating with the arrow keys (switching between cells) should not be disabled, it just should not add a new row to the dgv.
6. and here my related codes:[code]
I think if I press the left arrow key, that fires up the cellvalidating event and after that the cellendedit event. I 'd like to manage this so that if the current cell is the 5th (e.ColumnIndex=5) then it should detect what was pressed (arrow key or enter). If enter then add new row, if arrow key (left) then cellendedit and switch to another cell but in the same row (of course if more rows existing up and down keys are possible).
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May 17, 2010
Ivalidating only by enter key
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Nov 19, 2011
I'm writing a part of an application for a movie ticket program.
Basically, I have to write an If statement verifying the age put in a textbox, based on a radiobox that is checked.
So, if the radiobox "PG" is checked, the age in the textbox has to be equal to or greater than 12. If "Restricted" is checked, then the textbox has to be equal to or great than 17.
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Nov 23, 2010
I have a textbox, a standard button and a toolstrip containing a couple of buttons. In the validating event of the textbox i coded to check whether it is blank. If yes then it shows a message 'Enter Value'. When the standard button is clicked while the textbox is empty, it's validating properly and showing the message but when the toolstripbutton is clicked it's not not validating the textbox and no message is being shown. It seems that I gotto write the validation code explicitly in the toolstripbutton_click event which is too troublesome when there are multiple textboxes and toolstripbuttons on a single form. What I want to know is whether the textbox_validating can be fired while the toolstripbutton is clicked? Handling toolstrips is really a headache. I'm badly in need of it.
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Jul 22, 2009
I have a page where a user can either select a vendor via dropdown or enter a vendor number via textbox. One or the other must have a value. I can do this in javascript easily but how can I do this using a custom validator provided by ajax all on the client side?
Edited:
Protected Sub ImageButton1_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles ImageButton1.Click
If Page.IsValid Then
//save stuff
End If
[code]....
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Nov 5, 2007
why the following Sub does not work as expected. It has no compile errors but it does not work. It suppose to validate a password entered by a user on a login form with users password in a table called 'passwd' in the LgaPayroll database. If the password entered matches what is in the password field of the 'passwd' table then it will display a form else, it will tell the user 'The password you enter was invalid". My problem is; even when you entered a password that is in the 'passwd' table, it is tells you 'The password you enter was invalid'. Below is the Sub:
Private Sub btnOK_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnOK.Click
' Set the SelectCommand properties...
objDataAdapter.SelectCommand = New SqlCommand()
[Code].....
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Jul 27, 2010
I have a MDIParent form and 2 child forms. One of them,form1, has a textbox for which certain validations are present in the validating event. The other one has a button on it. When I try to navigate from form1 to form2, the validating event is firing twice for the first time. Is there a way to make it fire only once. And also, this event fires whenever I try to close the mdi parent form Attached is a sample project.
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Nov 23, 2010
I have a textbox, a standard button and a toolstrip containing a couple of buttons.In the validating event of the textbox i coded to check whether it is blank.If yes then it shows a message 'Enter Value'. When the standard button is clicked while the textbox is empty, it's validating properly and showing the message but when the toolstripbutton is clicked it's not not validating the textbox and no message is being shown. It seems that I gotto write the validation code explicitly in the toolstripbutton_click event which is too troublesome when there are multiple textboxes and toolstripbuttons on a single form. What I want to know is whether the textbox_validating can be fired while the toolstripbutton is clicked?
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Nov 23, 2010
I have a textbox, a standard button and a toolstrip containing a couple of buttons. In the validating event of the textbox i coded to check whether it is blank. If yes then it shows a message 'Enter Value'. When the standard button is clicked while the textbox is empty, it's validating properly and showing the message but when the toolstripbutton is clicked it's not not validating the textbox and no message is being shown. It seems that I gotto write the validation code explicitly in the toolstripbutton_click event which is too troublesome when there are multiple textboxes and toolstripbuttons on a single form. What I want to know is whether the textbox_validating can be fired while the toolstripbutton is clicked?
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May 18, 2009
I am trying to calculate from a case, and it does not seem to work, and I also need to validate when no input is entered and the person presses the calculate button. my code is a follows
Public Class Question2
Dim intSal, intCount As Single
Dim intPiece, intRates, intPay As Long
[code].....
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Apr 11, 2010
I am working on a Sudoku project and am stumped on how to finish my code below so that it will check the rest of the rows in the specified c
Private Function validCol(ByVal col As Integer)
Dim myCol(8) As Integer
Dim valCol As Boolean = False
[code].....
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Dec 15, 2011
validating a datagrid coloumn..,i want only alphanumeric values.,symbols like -,+..etc were not allowed..folliwing is the code wht i have.,but it allows only alphabets but not numerals.
[Code]...
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Dec 13, 2009
I have had a look over some posts in here on a similar theme as to my question but none of them are getting me any further forward. All I am trying to do is make sure that when a phone number is entered in a textbox that it conforms to the following formats:
1) #### ### #### (All numbers)
2) ##### ###### (All numbers)
3) ###### (All numbers)
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