ASP.NET Custom Validators - Page.Validate("groupName") Not Firing?
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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Apr 19, 2011
I found the source of the issue i did not explain it very well. Basically i have a form with a compare validator that makes sure my txtstartdate is not less than my txtenddate. So these 2 text boxes have ajax calendar attached to it and when I select those 2 my compare validator appears and gives an error.
[Code]....
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Aug 3, 2011
I have a masterpage in which I attached a content page. Now, I added a button which is running at server and placed a code, MsgBox("hi"), in its click event. I placed a breakpoint in its click event and played it to see if it's firing and it clearly did not.
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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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May 15, 2012
I have a form with:
[Code]...
Whenever I change the value of MyTextBox and press MySubmitButton, the select method of MyObjectDataSource is invoked and everything works OK. But if I change the value of any of my check boxes (without changing the value of MyTextBox) and press MySubmitButton, the select method is not invoked, thus the "MyObjectDataSource_Selecting" event doesn't take place and I get the same results as before.
One way I found to work around this was to explicitly invoke MyGridView.DataBind method whenever MySubmitButton was clicked. Is this the best way to handle these type of parameters? What I am afraid is that this may cause the select method to be called twice making the page slower.
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Oct 9, 2010
Every time I refresh the browser, my button's event handler fires again. How do you prevent this?
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Sep 6, 2011
I have an asp.net app that launches a modal window upon button_click event. That modal window launches another modal window upon another button_click event.
However, the final modal window's "Page_Load" event is not firing.
The second modal winodw is called via a javascript call from vb.net code behind Page.ClientScript.RegisterStartupScript(Me.GetType(), "Script", "ShowModalWin('brPreview','brPreview')", True)
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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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Mar 20, 2011
I'm trying to add validation to one of my class properties:[code]The value for the golfer's handicap comes from a oombo box on the form. Even if I have nothing set for this property at runtime, my validation doesn't work. I tried putting the If statement under Get instead of Set, and tried mHandicap = value after an Else in the If statement, but nothing seems to work. I'm working in the dark here and can't find anything suitable online. I was hoping to not go down the path of ReadOnly or WriteOnly properties as I'm not at that stage yet, but does this make a difference for my purposes here? Can anyone guide me as to what I'd need to do from this point? If I've got it right, you can add validation in the class and this means that you then don't need to repeat this validation in the form??
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Feb 22, 2012
prevent a button serverClick event from firing on page refresh?
Markup:
<INPUT id="btnGo" type="button" value="Go" runat="server">
VB.net:
Public Sub btnGo_ServerClick(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles btnGo.ServerClick
The btnGo_ServerClick function needs to fire on the button click, but not on page refresh.I've tried using IsPostback, but that is always true- even on the button click.N.B. I'd rather not go into the reasons behind why I'm using a serverclick, rather than an asp:button and a click event. Suffice to say it just isn't suitable for I am doing.
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May 31, 2009
I want to make a message box appear to show that the webpage has already loaded. I have used the code below:
Private Sub Button11_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click
WebBrowser1.Navigate("[URL]")
If WebBrowser1.ReadyState = WebBrowserReadyState.Complete Then
MsgBox("yahoo is now fully loaded ")
End If
The message box is not showing at all . I have looked for "DocumentComplete" but can't get it working ..
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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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Apr 27, 2011
I have a user control that checks if a certain query string and session value are present then returns a boolean based on that, if it's true I want to set the master page. The page is throwing an Object reference exception when it tries to call the method EditUser1.UserAuthorization(). Why is this happening? I imagine that the method doesn't exist at that point in the stack. Protected Sub Page_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit
[Code]...
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Jun 5, 2009
ItemCommand Event of FormView control not firing/working in ASP.Net Page
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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 23, 2010
I am making a windows application that should validate user input before opening up the next form page. I can get the error messages to show, but after correcting the error, they won't disappear and open up the form.
[Code]...
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Jan 5, 2012
i am using vb, i have a aspx page which contain a textbox (txtStudentName) and a drop box (dropdownlistGroupName) and a save button
student table
StudentID StudentName GroupID
1 ABC 1
[code]....
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Jul 2, 2011
How to use control validators in vb.net window forms.....
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Jan 5, 2011
I have 3 different validation groups on my web page, but when I click submit I want all of the groups to validate? It seems to me like the causesValidation="true" of the button will not validate the validators that are in their own validation group. So right now I am calling a javascript function that manually validates the groups.
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Now this works fine and dandy... But it seemed to me like before I had all the groups on the page the validators where much faster than how it has to validate them now. Is there something special i have to do to my button to get all of the groups to fire when it is clicked without the help of this javascript function?
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Jan 26, 2010
When I have a property within a class such as:
''' <summary>
''' Customer IP address.
''' </summary>
[code].....
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Nov 28, 2011
I have a form to register new users for my site and their are required field validators on the page.
I want to include a cancel button that redirects the form to the main page but unless the required field validatiors are satisfied it will not run the code when the cancel button is hit.
How can I have the code for the cancel button run even if the form is not fully filled out?
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Apr 26, 2012
I'm trying to figure out a way to validate the user data entered:
[Code]...
This is in MVC3, VB.net. I'm looking for an easy way to validate a users input data into the editorfor field.
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Mar 12, 2012
I've written a class for a new TabPage type.The only thing I've added is a couple variables which I can assign to the tab page in order for my app to identify which tab page is selected.This works fine on my pc, and a few others, but I have one customer who is using my app.When they run, and they open a new tab, the TABcontrols.tabpages.add(NEWTAB) errors out.I'm 100% sure that this is because it doesn't like the fact that newTAB is my custom TAB class.When I did some debugging, his pc moved past the error when I just added a default tabpage type.
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Aug 6, 2010
In asp.net, I can define a custom error page like this:
<configuration>
<system.web>
<customErrors mode="On">
[code]....
Now my question: If I replace, say 404.aspx with AnyHTTP.aspx,and want to get the number of the http error to generalize the page, how do I get that error numer?
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Sep 2, 2009
When a request is 404 in ASP.NET on IIS 7 i want a custom error page to be displayed. The URL in the address bar should not change, so no redirect. How can i do this?
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May 14, 2012
I am creating a custom log in page using VB in Visual Studio. Every time I try logging in, however, I get the following error:"Incorrect syntax near '.'".When I put in the wrong username/password combo it recognizes this, but when it is right it will get this error and fail to log in.
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Feb 20, 2012
I have the folowing code in the login page
If objDR.Read = True Then
Dim ticket As New FormsAuthenticationTicket(1,
objDR("UserID").ToString,
[Code]..
When i login as a student, it cannpt response to redirect the page i want to ,
and login as a lecturer also has the same case, cannot redirect the page i want.
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Nov 4, 2011
I am trying to set custom paper size on my printer with Winspool.drv. But getting error as 'Attempted to read or write protected memory.'
Private Sub btnTest_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTest.Click
Dim hPrinter&
[Code].....
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Apr 5, 2009
I'm in the process of making a Web Browser, and after having mastered most major functions, I would like to create custom error pages. Like the "This page cannot be displayed" IE Page, but with my own logos and text.
How would I go about redirecting this? The current one is at System.Windows.Forms.HtmlDocument
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Oct 26, 2009
I have seen it somewhere ages ago but cannot find the link... I want to create a custom drop-down "property page" like the one that pops out when you click on the down arrow in the property grid to set the anchoring.
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