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Unblock controls if !Page.IsValid

I have ASP.NET WebForms application. One of it's pages is dynamically created table with RegularExpressionValidator. Above of table there are several LinkButtons, which manages navigation of application. But if I put invalid value to textbox in table, Page.IsValid is set to false and all controls on page are blocked.
So, how can I unblock buttons even if validator set Page.IsValid to false? Thnak you.

You could use ValidatorGroups to separate the validations.

Assuming you want to "unblock" the link buttons used for navigation, you can use:
CausesValidation="False"
in the ASPX markup for the link button.
Example:
<asp:LinkButton ID="btnBack" runat="server" data-transition="fade" CausesValidation="false"
data-theme="b" data-icon="" Text="Back" onclick="btnBack_Click" />

Custom Validator not firing

I realize there are lots of similar posts, however I have not found one that has worked for me unfortunately. Basically, I have an asp:customvalidator that I am trying to add to a validationgroup with other validators so that all error messages appear in the same alert. Here is the customvalidator
<asp:TextBox runat="server" ID="txtVideo1Url" Columns="20" Width="98%" />
<asp:CustomValidator runat="server" ID="valURL1" ControlToValidate="txtVideo1Url" OnServerValidate="txtVideo1Url_ServerValidate" Display="None" ValidationGroup="submission" />
and here is the event
protected void txtVideo1Url_ServerValidate(object sender, ServerValidateEventArgs e)
{
e.IsValid = false;
valURL1.Text = "FAIL!";
}
The event isn't firing at all and I have no idea why. Once I can get the event firing I can put some actual logic into it, lol
UPDATE: I've noticed that I am now able to get the event firing, however the validationsummary is set to display all errors in a messagebox and this error isn't getting added to the messagebox.

Remember to set this property on the CustomValidator...
ValidateEmptyText="True"

You need to set the CausesValidation property of the TextBox to true, like this:
<asp:TextBox runat="server" ID="txtVideo1Url" Columns="20" Width="98%" CausesValidation="true" />

You will have to add ValidationGroup="submission" to the ASP.NET control that will fire the postback.

CustomValidators don't fire if other Validators in your ASPx are not validating. You may need to force a Page.Validate("something"), with your specific validation group. I suggest look at OnTextChanged event to force a page validate.

use Javascript or C# to validate a webform

Would like to validate more than one control on one button click. I would like something to validate whether a textbox has contents if a checkbox is checked or not but the checkbox doesn't necessarily have to be checked and in that case I don't want to check the textbox. I tried validation group but each button needs to control the different groups and i need this all to be under one button.
I'm open to ideas of how to do this c#,javascript...etc. Heres some code: Button3 is the save which validates whether checkbox 1 is checked and if so textbox10 cant be empty. I have about four other instances of this but are independent of each other.
<asp:Button ID="Button3" runat="server" Height="24px"
Text="Save" Visible="False" Width="67px" Font-Bold="True"
causesvalidation="true"
validationgroup="required"
runat="Server" />
<asp:CheckBox ID="CheckBox1" runat="server"
oncheckedchanged="CheckBox1_CheckedChanged" Text=" Breach Letter Sent"
ValidationGroup="required" AutoPostBack="True" Enabled="False" />

You want to use the CustomValidator control which can validate both on the server and the client. There is an example in the docs here - http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.customvalidator.aspx

I would never do form validation in JavaScript. Believe it or not, but some people actually turn off JavaScript! Use validators to validate the field content. Of course this means a round trip to the server in most cases, but you get reliable and well integrated validation.

you can use validation with Ajax (in Ajax postback occures but you will not sense)

JavaScript Confirm on ASP.Net Button Control

I working on an ASP.Net C# application, I wanted to create a Button Control, when user click on the button, a JavaScript confirm popup, then get the Boolean value from the user (Yes/No) to perform further actions in the button onClick event.
my current approach was added OnClientClick and OnClick event in the button, where OnClientClick trigger JavaScript function and the (Yes/No) value is store into HiddenField Control to make use during OnClick event.
It is something like the following code fragments:
function CreatePopup(){
var value = confirm("Do you confirm?");
var hdn1 = document.getElementById('hdn1');
hdn1.Value = value;
}
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" OnClientClick="CreatePopup()"/>
<asp:HiddenField ID="hdn1" runat="server" />
Is there any better approach in order to do this? thank you in advanced.

Change your CreatePopup() function to return a boolean:
function CreatePopup()
{
return confirm("Do you confirm?");
}
And then ensure you return that from the OnClientClick() in the button:
<asp:Button ... OnClientClick="return CreatePopup();" />
Using that method, the OnClick() method will only fire if the OnClientClick() method returns true.

Why do you want to store the value of the JavaScript confirmation in the hidden field? Just simply return false in your JavaScript function when the confirm value is 'no' , to prevent the form from submitting. When cnfirm value is yes, return true to allow the form to be submitted. In your code behind in the button_click method you don't have to check what happened in your JavaScript confirm, since form will never be submitted if the user said no.

C# web application event handling

Which type of event would i place on a textbox to cause an action on the web form when the cursor leaves that textbox ?and how can i implement this?
I actually want to display a message on the form after details have been entered in the last textbox to notify users if they have left any field blank. I hope to apply this on the last textbox on the form.
I know an event handler shoud be able to instantiate this but am not sure which event would do this and how to implement it....
all advices are warmly welcome..
Thank you..

I think you are probably going to want to look at the ASP.NET validation controls. They should be able to handle what you are wanting to do.
http://devhood.com/Tutorials/tutorial_details.aspx?tutorial_id=46
http://msdn.microsoft.com/en-us/library/aa479045.aspx

You'll need to use javascript on the client to handle this. What you want to do is add a handler for the blur event. The blur event occurs when an element loses focus. Use this in conjunction with your client-side validation logic to trigger validation when the field loses focus.
I prefer adding my javascript unobtrusively. Below is an example of how you would do it using jQuery and the jQuery validation plugin. Using it with standard ASP.NET validators would work as well, just replace the call to the validation logic with that for your client-side validators, i.e., call Page_ClientValidate().
<script type="text/javscript">
$('form').validate(); // set up validation
$('#lastTextBoxID').blur( function() {
$('form').valid(); // validate when the blur event happens
});
</script>

You can put the textbox inside a div and add ur function in the event of onmouseover()
like this :
<div onmouseover="ChangeFocus()">
<asp:TextBox runat="server" ID="TxtBox1"></asp:TextBox>
</div>
<script type="text/javascript" language="javascript">
function ChangeFocus()
{
var Details = document.getElementById('<%=TxtBox1.ClientID %').text;
//Display the details of the textbox in the place u need
}
</script>
And take care to adjust the width of the div and the textbox to fit it.
or u can replace asp textbox with input field of type "text" and set it's event onmouseover to the function ChangeFocus().
Hope that this will be usefull

You could do something like this:
<asp:ValidationSummary ID="ValidationSummary1" runat="server" />
<asp:TextBox ID="txtName" runat="server" />
<asp:RequiredFieldValidator
ID="RequiredFieldValidator1"
runat="server"
ErrorMessage="The name field is required."
ControlToValidate="txtName" Display="None">
</asp:RequiredFieldValidator>
<asp:Button ID="btnSubmit" runat="server" Text="Submit" />

Could the TextChanged event be a likely solution? and when would this event occur?
I tried that but it didnt work... It appears that the event fires after the page has been validated (on button click).
any work arounds?