Develop Reference

How to get javascript confirm box after validating the form data in asp.net?

I am facing a problem in my asp.net web application that i need to display a java script confirmation box on click of Update button and this as per requirements given to me.
Currently I am using onclient click
<asp:Button ID="btnCustomerUpdate" runat="server" CssClass="applybuttonstyle"
Text="Update" onclick="btnCustomerUpdate_Click"
OnClientClick="return confirm('Do you really want to update?');"/>
It's working fine but the problem is i also applied some validation controls on my form fields so if a user leave any field blank and click update button then it shows javascript confirm box and the validation message below that form field.
And it is not desired behavior it should not show the confirmation box until unless all validation are passed.
I hope this is due to because i am using this on client click so please tell me a better solution for that.
Thanks in advance.

you can use Page_ClientValidate in your own confirm function to decide whether to display the confirmation dialog.
Something like:
function validateAndConfirm(message){
var validated = Page_ClientValidate('group1');
if (validated){
return confirm(message);
}
}
And on the server you will have something like:
<asp:textbox id="TextBox1" runat="server"/>
<asp:requiredfieldvalidator ValidationGroup="group1"
ErrorText="Need to Fill in Value!"
ControlToValidate="TextBox1"
runat="server"/>
<asp:textbox id="TextBox2" runat="server"/>
<asp:requiredfieldvalidator ValidationGroup="group1"
ErrorText="Need to Fill in Value!"
ControlToValidate="TextBox2"
runat="server"/>
And your button code will change to:
<asp:Button ID="btnCustomerUpdate" runat="server" CssClass="applybuttonstyle"
Text="Update" onclick="btnCustomerUpdate_Click" ValidationGroup="group1"
OnClientClick="return validateAndConfirm('Do you really want to update?');"/>
Obviously, I cannot test this, but you get the idea.
If you will be using Page_ClientValidate you might find this SO question useful.

You can call the Page_ClientValidate method to ensure the page is valid before asking the user:
if (typeof(Page_ClientValidate) == 'function' && Page_ClientValidate() == false) {
return false;
} else {
return confirm('Do you really want to update?');
}

You should atleast apply validation on client side first and than open a confirmation dialog,
while on server, you have to use server side validation first too in case if user has disabled javascript, and than update the record.
You can also use AJAX to update record, so if a validation message occurs, shows error message and if the validation passed, than you can alert the user but the only disadvantage of using that is you have to re-post the data again. To mitigate this problem you either have to save in temporary table, until user gave confirmation and than delete it from temporary table but obviously it takes a lot of work.

Button need to be click twice to fire an event

I have a simple ASP.NET Button inside of iFrame, for strange reason i have to click it twice in order to fire an event.
<asp:Button ID="btnSaveComment" runat="server" Text="Add Comment"
CssClass="button"
OnClick="btnSaveComment_Click"
ValidationGroup="add" />
protected void btnSaveComment_Click(object sender, EventArgs e)
{
AddComment();
}

I suspect that when you initially click an area above the button you're giving focus to the iframe (that is to say, the page within it), and on the second click the mouse can interact with the button.
On the other hand, if the page seems to be posting back but not actually doing anything until the second click, then it might well be related to the page lifecycle, as suggested in an answer comments by #AndroidHustle.
Edit:
To test the theory of whether or not the frame is focused, try giving it focus via script. Something like the following might help:
<script type="text/javascript">
document.getElementById("iFrameId").focus();
</script>

I had the same problem. Here is how I solved it:
$("#MainContent_Button1").hover(function (event) {
$("#MainContent_Button1").click()
});
Now it only takes 1 click, and the button functions like it's supposed to.
<asp:Button ID="Button1" runat="server" Text="Save Payment Plan" OnClick="Button1_Click" />

How to validate expression on button click in asp.net C#

I am making a website and I have made a form fields like email field and validation expressions associated with it. Validation is initiated on text change. But i want it t execute on "submit" button click event.
I have searched but could not locate the solution to my problem. Please tel me why is this happening and how can i make it right. I am new to this web development field, So need help from you guys.
Thanks in advance!!!
Hamad

You could disable showing errors in the validator itself and instead make a validation summary which will be shown only after you click submit.
Like this:
<asp:RequiredFieldValidator runat="server" ControlToValidate="txtEmail" ValidationGroup="vRegister" Display="None" ErrorMessage="Email field cannot be empty"></asp:RequiredFieldValidator>
and then declare a validation summary:
<asp:ValidationSummary runat="server" ID="vSummary" ValidationGroup="vRegister" DisplayMode="BulletList" />

What you should do is change the value of EnableClientScript to false. Then call the validation from your code behind (which should always be done since a user can disable their client side validation anyway. Security rule 1, never trust the client)
EnableClientScript: Gets or sets a value indicating whether client-side validation is enabled.
<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" runat="server" EnableClientScript="false"
ErrorMessage="*" ControlToValidate="txtName" ></asp:RequiredFieldValidator>
Code Behind:
protected void btnSave_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
//Do stuff
}
//No need for else, the validations should display accordingly
}
Additional resources: http://weblogs.asp.net/rajbk/archive/2007/03/15/page-isvalid-and-validate.aspx

Are you simply looking for the validation type controls to validate input?
If so look at the property EnableValidation and set it to true. Doing so will force the validation of the textbox even before the button_Click event can execute.

Try this:
<asp:TextBox ID="txtName" runat="server" Height="23px"
Width="252px"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" runat="server"
ErrorMessage="*" ControlToValidate="txtName"
ValidationGroup="vadd"></asp:RequiredFieldValidator>

The "Causes Validation" property on the button itself will automatically force your page to meet you validation specifications before firing the rest of the code associated with the button press.

If i have understood your question, you need to create a same validation group for each of the validation control in your aspx page. You also need to have a validation summary with same validation group. And atlast in the submit button in aspx page you have to mention same validation group...

aspx submit form error

Im working with asp.net framework 4.0 and I have this code:
form id="form1" runat="server" method="get" action="Profile.aspx"
// some code
asp:Button runat="server" ID="SubmitButton" Text="Submit"
Each time i click the submit button i get this error:
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
any idea how to fix it ???

This is caused by cross-page POST (i.e. you are submitting the ViewState of the first page to the second). You can add PostBackUrl to the button like this:
<asp:Button runat="server" ID="SubmitButton" Text="Submit" PostBackUrl="~/WebForm2.aspx" />
Alternatively you can handle the click event of the button in the first page, move some of the logic in this handler and do a Response.Redirect (i.e. GET request) to the second page. The right solution depends on your particular case.

If you want to send post back to your current page, remove in form tag method="get" action="Profile.aspx" attributes. And handle in codebehind post data from your page.
If your want to send data you another page like Profile.aspx, use PostBackUrl attribute of the button control, like Stilgar wrote for you. And then in Profile.aspx codebehind to get access to control from your current page use somethink like this:
If(Page.PreviousPage != null)
{
var textBox = Page.PreviousPage.FindControl("ControlID") as TextBox;
if(textBox != null)
{
//Use your logic here
}
}
Hope it will be helpful for you!
Best regards, Dima.

Validations to be done before js function call on button in asp.net

I have some text fields and a button on my aspx. The text fields are validated using required field validators. On button i have set OnClientClick() event to do certain JS operations.
The problem here is that, the JS function is called before validations are completed. That is i need to validate first and then call js on client click event of button.
Can anybody help me?
Thanks for sharing your time.

You could do the client side validation manually:
<asp:Button ID="Button1" runat="server"
OnClientClick="if (Page_ClientValidate()) return YourFunction(); else return false;"
OnClick="Button1_Click" />
Remember to do whatever checking server side as well since you javascript could be manipulated and/or bypassed.