I have dragged across the details of a table from the data sources onto a form. So VS2008 automatically generate the BindingNavigator, DataAdapter,Dataset, ...etc. On the form I hv also placed an errorProvider and listbox, which is bound to the bindingsource. So as user clicks on the items of the listbox, the values of the textboxes changes accordingly. My question is how do I validate the values in the textboxes.
View 4 RepliesI want to VALIDATE Image Combo control just like the one that is in CommonDialog control. Now I have to choices:1. Put validation routine in Click Event, it works fine if I only use mouse, but if I use keys (Arrorw, PgDn-PgUp, Home-End, etc) Click Event is invoked.2. Put validation routine in Validate Event, perfect; but I will work until when focus is moved to other control.How CommonDialog Image Combo does work? I can open it with mouse click or with F4, then I can move across options with mouse or keys and, when I click a choice or press Enter is when validate routine is invoked.
View 1 RepliesI'm trying to make a validation control that only allows (a-z, A-Z, and 0-9). Which control to i use in vb.net or do i have to write specific code to validate it?
View 3 Repliesis there any way of making a textbox only accept intergers and treat them as such when doing calculations.
View 5 RepliesHow to make validation Only Allow letters and Numbers to Input, without any special character in Textbox
View 4 RepliesI have a set of nested classes built inside a main class called MainClass. This is a class library project, the end-user will be using the MainClass by referencing.
I want to add a user login functionality at the creation point of the class. So that if the login fails, the entire class is inaccessible to the user. I have the following code
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im trying to build a form+attachment that needs to be send to email.Im using a VB background code (attachementemail.aspx.vb)and my front (b-16.aspx) I want the page to check that the user entered a email, name, phonenumber and attachment. what command do I put in the axp.vb and what on the .aspx tried just about anything.
View 2 Repliesmake a registration from with proper validation & connectivity with sqlserver 2005.
View 1 RepliesWhen I read a value from text box I want to make sure user has entered a number(int/float/double etc.) not a string. Is there any function to check it? otherwise how do i validate it.
Language : VB.NET
Version : Visual Studio 2005
This seems like I only need a line or two of code? This is what I need to do:
Add data validation to the new phone field on the Contact Us form. We would only accept phones with the following format: 995-999-9999 Complete the contact us form so that you can submit it as an email. Send all your test emails to blah@boo.net. You can use any email account you have to send the email.
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Add data validation to the new phone field on the Contact Us form. Wewould only accept phones with the following format: 995-999-9999Complete the contact us form so that you can submit it as an email. Send all your test emails to blah@boo.net. You can use any email account you have to send the email.
View 4 RepliesI've built a UserRepository interface to communicate with my LINQ to SQL Data layer, but I'm trying to figure out how to implement validation.
Here is what my AddUser subroutine looks like
Public Sub AddUser(ByVal about As String, ByVal birthdate As DateTime, ByVal openid As String, ByVal regionid As Integer, ByVal website As String) Implements IUserRepository.AddUser
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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]....
I Have four textboxes, I want textbox1 to accept only char data.I want textbox2 to accept only numeric data.I want textbox3 to accept
View 1 RepliesI was having a little trouble using TryParse. I have 3 texts boxes that I just want to always be decimals and if false a message box will come up, but if true it will do nothing. Another thing was how can I just make it so one message box comes up because right now I have it split into 3
If Decimal.TryParse(TxtLoan.Text, decAmountInput) = False Then
MessageBox.Show("The data you enter must be positive, numeric data. Please re-enter valid date. ", "Invalid Data")
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I'm using a series of nested if/then/else statements to make sure a user enters information into each text box or chooses a radio button. What would i use to say if no text is entered in textbox1, then ... also what would i use to make a sure the user choose one or the other radio button? for example i also have a combo box, i used "If SubjectComboBox.SelectedIndex <> -1" for the if statement.
View 2 Repliesin the sense that MVC does not complain about my protected inner abstract Metadata class, and the model validation still works:
Partial Domain Object, generated by a tool:
Partial Public Class SampleDomainObject
Private _id As Integer
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I did this because I didn't want to have to implement actual properties with backing fields, getters, and setters in VB.NET for the Metadata class to keep the maintenance to a minimum (I'm on .NET 3.5, no auto-properties for me).What I'm worried about is that having a protected abstract inner class could be confusing to others using this domain object outside of MVC (my domain objects are part of a shared data access framework).
I have a huge amount of data in flat-file format that I would like to validate with Visual Basic 2010. Basically the data is a text file with 300 comma separated fields and 500,000 records.
Any tips, sample code or examples? Are any .NET classes specifically geared for data validation?
As I have different validation rules for each field (some fields are dates, some are currency, etc.) I would like to store the rules away from the code (e.g. in an SQL database table). Has anyone seen this done before?
What is the best method to do data validation? I want to do data validation when the user exits a control so that he gets immediate feedback. I can use the Validating event or the Leave event for that. The problem is, that if the user doesn't know the right answer, and just wants to click the cancel button and leave the form completely, it won't let him. It continues to give him an error message until he completely deletes his answer. Very frustrating. Does anyone have a good method for doing this?
View 5 RepliesPossible Duplicate:How can I handle a Validation.Error in my ViewModel instead of my View's code behind?The usual examples of how to use Data-Validation in WPF usually only involves defining an error template for the control and displaying the error message in the control tooltip. What I want to do is to create a collection of all ValidationErrors, display it in an ItemsControl to the user and focus the invalid control when the user clicks on the associated (error) item in the ItemsControl.
View 2 RepliesHow do you validate input when you are dealing with doubles. I have successfully gotten the message box to pop up when the user enters a number in a text field, but what if I have a text box that requests a number from the user and they enter text? This is the code, the even for btnDisplayFull works fine, but not btnDisplayRqst: [code]
View 2 RepliesI have four textboxes,
I want textbox1 to accept only char data.
I want textbox2 to accept only numeric data.
I want textbox3 to accept only alphanumeric data.
I want textbox4 to accept only bolean data.
Is there a dataannotation validate rule for a collection based property? I have the following
<DisplayName("Category")>
<Range(1, Integer.MaxValue, ErrorMessage:="Please select a category")>
Property CategoryId As Integer
<DisplayName("Technical Services")>
Property TechnicalServices As List(Of Integer)
I'm looking for a validator that I can add to the TechnicalServices property to set a minimum for the collection size.
I am testing custom data validation with partial classes. It is a Windows Form Entity Framework application .In the partial class file (time.vb) the code is:[code]What is wrong with my code? How can I handle the exception message in the main form (thrwon by the OnDataFundChanging event)?
View 3 RepliesI'm currently working on a data entry application in VB.NET and I'm using data-bound controls by simply dragging the table from the Data Sources window onto the form. It's my first time doing this, but this will save me quite a bit of time since this table has plenty of fieldsAnyway, my problem is that when I enter an invalid value in a textbox and then delete the text it won't let me select other controls or even close the form!
For example, say I have an Age field in the DB, which is an int and I mistakenly type "," on its textbox. Then I decide I actually want to leave that field blank (considering it allows nulls) so I just delete all of the textbox's contents, after doing so, I'm not able to switch focus to another control or close the form.
I am newbie in VS 2005 and started learning. Can you please tell me how to Pop up the data from a table when there is a key press in the textbox.
View 11 RepliesIm trying to improve some apps ive written, the first is a console app... Im trying to get it so that i wont get an invalidcastexception if the user inputs a string, when the variable is type "Double"
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I tried my best to shrink down the program to the following code. In this example, I have UK and USA as valid countries. If someone lives outside those countries, I wanna show an error message and highlight them on the gridview. For example, John and Chris are from China so they should be highlighted on the gridview. Either just Name or the whole row can be highlighted.
Dim dt As New DataTable
dt.Columns.Add("ID")
dt.Columns.Add("Name")
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I have a dataset along with code for validation. When I use a datagridview and setting the EditMode to OnEnter I get the red exclamations telling me that I have an error when this is needed. This works all good. when I click the save button on the BindingNavigator, the application saves the record even when this validation is showing. How do I filter up this validation code through a datagridview and stop the program saving the data? If you need the code for more information, I will add this to the forum.
View 2 RepliesI have an application has a data entry form, and currently I'm using the form validation and validated events to validate the data - along with an error provider. I've read that this logic should be placed in the Dataset rather than the form. To that end, i've started exploring how to do that.
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