Asp.net - Custom Validator Not Firing (No Error Message, But No Validation)?
Jan 17, 2011
I have a custom validator:
<asp:CustomValidator ID="QuestionValidator" runat="server" ErrorMessage="Please select an option" ClientValidationFunction="QuestionValidator_ServerValidate" OnServerValidate="QuestionValidator_ServerValidate" ValidateEmptyText="true"></asp:CustomValidator>
I have a list of questions provided by a datalist, which I need to ensure a user selects an answer to each question. I then have my validation functions:
Protected Sub QuestionValidator_ServerValidate(ByVal source As Object, ByVal args As ServerValidateEventArgs)
Dim SelectedItem As Boolean = False
For Each c As Control In Page.Master.FindControl("form1").Controls
If TypeOf c Is RadioButton Then
[code]....
When I run the page, there is no validation and no error message. Please can you point out where I am going wrong, I'm suspicious it is at Page.Master.FindControl("form1").Controls.I have previously done such validation by looping through controls via form1.controls but this is unavailable as the page uses a form passed down via the master page.
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Jun 14, 2009
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]...
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Oct 24, 2011
I am trying to validate a textbox based on a dropdownlist, e.g. if ddl value is 'Day', textbox value cannot exceed 31. It seems that no matter what I enter triggers my custom validator error, what am I doing wrong,
<asp:TextBox ID="uitxtCamLastVisitDur" runat="server" CssClass="tooltip"
Width="65px" Enabled="False" ToolTip="Indicates a required spending on the member's last visit."></asp:TextBox>
[Code].....
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Sep 8, 2009
Is it possible to put Number validation in required field validator in asp.net text box?
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Sep 1, 2011
I know it's possible in asp.net to create a custom error page in a web app, by putting the following line in the web.config: <customErrors mode="RemoteOnly" defaultRedirect="frmErrorPage.aspx" />
I have had to do this for my web app, since it is clearly much tidier than letting the program bomb out with it's ugly default error page. My custom error page just has the customer's logo and a brief message saying "Error has occurred. Please return to homepage"The trouble now is that I have no way of knowing what caused the error, when a customer reports it.
Is there a way to make the actual error message appear on this custom error page too?
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Feb 15, 2012
I just have this program that validates if the selected file is an excel file, and I want this to have a separate function for validation so I can use that function to other program
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May 9, 2012
In IIS 5.1, i have set the website security to Basic Authentications and i have set the page for custom error in IIS which is directing to c:est.asp file. When user try to access the website, the user name and password screen comes up and after entering the wrong password 3 times, system shows the custom error page which is fine but why does system prompt for the user name and password again (for three times)?
I don't want user login screen on custom error page. I have tried to put the custom error page on the default website and set the security to anonymous but it still shows login screen on custom error page.
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Apr 19, 2011
I want to make sure using the custom expression validator that no ' or " can be used i tryed using [^"'] but whenever i put normal letters it doesnt work either.
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Mar 9, 2011
I am trying to call cetralized class function ONservervalidate for a custom validator, So I don't have to write it on each and every page.
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Jun 25, 2010
I've got the following View
[code]...
However I'm not getting any highlighting.
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Jan 25, 2012
I'm trying to run a Visual Basic (4.0) program that has run on every flavor of Windows so far. Using Windows 7 I get the following error message:
Can't load (or register) custom control: 'comdlg32.ocx'
This file is in the same directories as it is in a WinXP machine where it runs just fine.
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Nov 16, 2011
i have follwing textbox,
<dx:ASPxTextBox runat="server" ID="txtCustomer" Native="true" CssClass="medium required">
<ValidationSettings RequiredField-IsRequired="true" ></ValidationSettings>
</dx:ASPxTextBox>
when User doesn't enter anything into textbox, inbuilt Required field validation fires. and displays * indicating it is required field but i want to change some css style to AboveTextbox when RequiredField event is fired. i mean i want to perform some task when Inbuilt requiredfield Validation fires. how can i catch or how can i know when Requiredfield validation fires?
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Nov 10, 2010
I never got into detailed error processing too much when I played in VBA/VB6 a lot. Mostly then, if you ran into a user error (such as some input of theirs failing a validation test of some kind), you popped a MsgBox() with some error information and the critical (or warning) icon, and safely aborted out of the code
In .NET, my reading basically points to exceptions as the end-all in error handling. It looks to me that if you know a spot of code where a user can screw up, you're supposed to catch it with either try...catch blocks (for things like data conversions), or standard if...the...else constructs for other things, and then throw a new exception if needed.
Isn't throwing an exception essentially a forced crash of a program in a sense (granted, you get the option of continuing)? Or are exceptions geared specifically for things like data conversion errors and other "things that shouldn't happen", and resume use of MsgBox() and friends for minor user screwups?
Consider the case of where you have a TextBox that is only supposed to accept numeric data (or heck, just a specific set of characters). Barring some other trick that lets you restrict that field (let's just assume it's freeform, programatically), it would seem a bit of a waste to throw new exceptions everytime they type in an invalid character, or even if the error checking doesn't happen until they press a submit button (like on a webpage). Popping a MsgBox() seems more sane in that case.
So what's the straight dope on exceptions and throwing new ones on user errors? How about if your program also exposes a programmatic framework? Bad usage of one of the programmatic functions definitely seems like new exception territory to me.
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Oct 28, 2009
I have a custom text box component (inherits from system.windows.forms.textbox) that I created in vb.net (2005) that handles the input of numeric data. It works well.
I would like to suppress the validating and validated events from firing if the number hasn't changed. If a user is tabbing through the form and tabs from the text box, the validating/validated events are fired.
I was thinking that the text box could cache the value and compare it to what is listed in the text property. If they are different, then I would want the validating/validate events to fire. If they are the same, nothing is fired.
I can't seem to figure out how to suppress the event. I have tried overriding the OnValidating event. That didn't work.
Update:
Here is the custom text box class. The idea is that I want to cache the value of the text box on the validate event. Once the value is cached, the next time the user tabs through the box, the validating event will check to see if the _Cache is different from the .Text. If so that is when I would like to raise the validating event to the parent form (as well as the validated event). If the _cache is the same, then I don't want to raise the event to the form. Essentially the text box will work the same as a regular text box except that the validating and validated method are only raised to the form when the text has changed.
Public Class CustomTextBox
#Region "Class Level Variables"
Private _FirstClickCompleted As Boolean = False 'used to indicate that all of the text should be highlighted when the user box is clicked - only when the control has had focus shifted to it
[Code]....
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Oct 12, 2011
I have small lightswitch application having CreateNewUser Screen.Screen fields comes from Datatable added in DataSource, I have made all Validattion of fields at DataSource side.However i have added one Custom Control in the screen named : Re-TypePassword.Whenever user click on save button I want to match the Password and Re-TypePassword and want to prompt user a validation message if Password and Re-TypePassword are different.how can i display that validation massage ? ( I mean i want to add validation message to Summary of messages that appears at the top of screen)
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Sep 29, 2011
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)?
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May 16, 2011
My goal is to have the user be able to click the row and the row will be the selected row almost like having the select button but the entire row clickable to do the same thingthe error i get popups when i click the row, not when the webpage is loaded
this is the onrowdatabound portion i just added that causes the error
If e.Row.RowType = DataControlRowType.DataRow Then
' Get reference to button field in the gridview.
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Apr 1, 2010
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.
[code]...
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Feb 22, 2009
how to create an error message by message box to tell the user to enter a number only if they key in a character value?
I MEAN AFTER THEY PRESS THE CALCULATE BUTTON
Private Sub btnCalcFat_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalcFat.Click
Dim intFat As Integer
intFat = Integer.Parse(txtFat.Text)
lblResultDisplay.Text = txtFat.Text * 9
End Sub
My text box is call txtFat
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Aug 11, 2011
I am getting the error Parser Error Message: The server tag is not well formed. on the code line below:
<asp:HyperLink ID="imgFileType" ImageUrl="images/Icon_Pdf.gif" NavigateUrl='<%#"javascript:ViewFile('erg_", Eval("DocumentName") %>' runat="server"></asp:HyperLink>
I need the url link to be parsed as:
javascript:ViewFile('erg_Invoice_3200_QRG_Restaurant.pdf');
What am I missing in the syntax?
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Jan 5, 2011
I have a custom validator in which the script validating the control is client-side javascript. In my VB code behind for the website I call Page.Validate("groupName") but my validation script is not fired at all. I placed a break point in my javascript, but it's not even touching my validation script. While when i use the same function on non-custom validators it works.
I am thinking that it is impossibly to call my client-side validation script in my VB behind code via Page.Validate("groupName"). Do I absolutely need a server-side validation function?
Here's a bit of code:
[Code]...
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Jun 1, 2009
Is there a way to make custom message boxes and input boxes that are the same way as regular messageboxes? So if I named my custom msgbox CustMsg I could put the code like this.
CustMsg("This is a custom message box",I don't know what to put here,,"Message")
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Sep 23, 2009
Is there an easier or more concise way to validate my form other than what I have below? Also, for some reason if one of the validations is triggered then it goes through each of the validations and message boxes before it will let me enter the value. Is there a way to keep it from going through all of the validations every time?
If txtCustomerNm.Text = "" Then
MsgBox("Please enter the customer name.")
txtCustomerNm.Focus()
End If
[CODE]...
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Feb 25, 2012
I have 4 Group Box,each contains some text boxes and combo boxes.I used Supervalidator Required Field Validator control to each of the controls in Groupbox1.and i implemented validation when cursor leaves the focus from the GroupBox1.it works perfectly..But my problem is,when i clicked "Reset" button it automatically turns on the validation and there is a "This field is required" message in other fields appears,after entering values to those fields in GroupBox1,then Reset works. How can I disable that validation check when the user clicks "Reset"?
Here Details1,Details2,Details3,Details4 are the name of the GroupBoxes
Private Sub Resetbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Resetbtn.Click
For Each Item1 As Control In Me.Details1.Controls
[Code].....
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Jan 15, 2011
I was wondering if it was possible to make custom message box options. What I mean is, I'm going to have a button that pops up a message box. The message box will say, for example, "What is 10 x 10?" and I want there to be three options, instead of a Yes/No type of thing: "1000", "100", and "20". Is there a way of doing that? Or would I have to create my own message box using some software?
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Mar 24, 2010
Here's my Application_OnError event sink in global.asax.vb:
Sub Application_OnError(ByVal sender As Object, ByVal e As EventArgs)
Dim innerMostException As Exception = getInnerMostException(Me.Context.Error)
[code].....
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Oct 16, 2009
I've created a custom MessageBox (a Form), that has buttons Yes and No. There is a function popUp() to show the MessageBox. I would call the MsgBox in a parent as follows:
CustomMessageBox.popUp()
Now I want the message box to return a value:
Dim a as Intger = CustomMessageBox.popUp()
But this should only return once the user clicks a button in the message box.
My popup sub:
Dim thread As New Threading.Thread(AddressOf GetResult)
Public Function PopUp(Optional ByVal ErrorMessage As String = "", Optional ByVal Title As String = "", Optional ByVal ButtonType As ButtonType = ButtonType.OK, Optional ByVal MessageType As MessageType = MessageType.None)
[Code] .....
gotResult is a Boolean = false. It the user clicks a button gotResult is changed to true.
result is a integer containing the number of the button clicked.
When I run this code, the result is returned, even if the user doesn't click a button. I understand why, because the main thread of the form is not "paused" while the user has not clicked a button. How can I pause the message box itself, until a button was clicked?
I've tried this:
Public Function PopUp(Optional ByVal ErrorMessage As String = "", Optional ByVal Title As String = "", Optional ByVal ButtonType As ButtonType = ButtonType.OK, Optional ByVal MessageType As MessageType = MessageType.None)
[Code] .....
But now the whole message box is captured in a loop and the message box is like disabled, because it waits for the loop to end, so the user can't click anything.
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Aug 3, 2011
I am developing a custom messagebox class like the following-[code]...
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Feb 23, 2010
I am writing a program using a structure for the first time. The structure has 10 string variables declared inside each equal to a individual textbox on a form. I need the program to be setup so that if one or all of those textboxes are empty at the time of the event being activated a messagebox is displayed telling the user one of their textboxes is blank. Now i could do this in a series of 10 if then statements im sure but using a structure theirs got to be an easier way.
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Oct 16, 2009
I have a user control which exposes three properties that the user can change - ValuesStart, ValuesEnd, ValuesIncrement. The default values of these are 0, 100, 10 respectively. These are conditional in that ValueStart needs to be less than ValueEnd, ValueEnd less than ValueStart and ValueIncrement greater than 0. I have put this logic into the property setter and have been testing the functionality of this through the designer and in code but when I do the following I get an error saying that ValuesStart has to be less than ValuesEnd:
CODE:
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