i have a form which has two textboxes and a submit button.on entering data and submitting data gets stored in the database.but if i again refresh the page the same data again gets stored.How should this be prevented?
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I was able to find examples throughout the internet that more or less accomplished what I needed to be done, but now I have run into some problems. I need to be emailed the form data when the users submits it and then the user needs to be redirected to a thank you page, in this case "thanks.asp". I have been unable to get the form to redirect users to the thanks page, and in my efforts I think I might have messed the email process up as well.
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I have a code that must be run ONLY IF a user posts data into a form. Posting data can be made aether by pressing submit button or pressing enter on keyboard, so here is the issue. So in short I need a translation of this php code if there is such translation in asp . net of course.
PHP Code : if($_SERVER['REQUEST_METHOD'] == 'POST')
Our team working on flash/Asp.net shopping cart projectsIn our projects we need to get previous flash file data.After two or three form submission the first page flash file data are missing.How can we maintain the state of flash file data?
View 1 RepliesIf a disabled drop-down list is dynamically rendered to the page, it is still possible to use Firebug, or another tool, to tamper with the submitted value, and to remove the "disabled" HTML attribute.
This code:
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The problem occurs when I use Firebug to remove the "disabled" attribute, and to change the selected option.On submission of the form, and re-creation of the field, the newly generated control has the correct value by the end of OnLoad, but by OnPreRender, it has assumed the identity of the submitted control and has been given the submitted form value.
.NET seems to have no way of detecting the fact that the field was originally created in a disabled state and that the submitted value was faked. This is understandable, as there could be legitimate, client-side functionality that would allow the disabled attribute to be removed.
Is there some way, other than a brute force approach, of detecting that this field's value should not have been changed?
I see the brute force approach as being something crap, like saving the correct value somewhere while still in OnLoad, and restoring the value in the OnPreRender. As some fields have dependencies on others, that would be unacceptable to me.
point me to a source where I can learn to create a form using dropdown, radio buttons, and other controls and then have web users submit information to me via email or post to SQL database so that it can be used. Do I need to be looking for sources via other languages such as php or javascript or can this be done easily using asp.net and visual studio.
View 3 RepliesI have a web forms web application (asp.net 2.0). When the user submits the form I have the submit link actually going away so they can't submit it again. However, they could press F5 and that is causing another insert into the database, which I don't want to have happen.
Is there a setting of some sort that I can set if/when they do press F5 to tell the page - don't submit again?
My web app has payment form that need to be submitted to another ASP.NET page (lets call it http://vendor.com/getpay.aspx)residing on another server.
That page will do some mumbo-jumbo works and then redirects it to the acutal
payment gateway site.
when i post my payment form to getpay.aspx via simple HTML form, it works and redirects fine.
if i change the form and its hidden inputs to server side controls, it doesn't work. their page is throwing viewstate exception.
I need the form hidden inputs to be server controls so that i can bind some values generated by my code behind.(i think i can do this like the classic asp way using <%= %>, but it is like going back in standard!)
I tried HttpWebRequest in the code behind, it posts the form but the browser doesn't redirect to Payment Gateway page. I am posting the payment info over non https, how can i prevent the user tampering with the posted data?.I want to validate the payment form in the backend then post it, i couldn't trust the user input data.Also the result was returned to my redirect page with query strings appended. It is also happening over the non https. how much i can trust this redirect data?
I have an asp.net page in an iframe where all links target _blank
<base target="_blank" />
But I want the form on it to submit to _self (i.e. the iframe where the page is located) when the one button is clicked. The form is an <asp:Panel> with an <asp:Button> control for submitting it.
Where can I set the target for this form? Since there isn't a <form> tag or an <input> tag in the file (ASP.NET makes them when it renders the page), I don't know how to change the target to override my <base> tag.
I am a beginner in ASP.NET. I coded for contact and enquiry forms submission (data is submitted to access db & then mailed to desired client) , its working fine on all browsers except IE! Both forms data is submitted to tblForms table of [URL] /contact/default.aspx
<asp:TextBox ID="txtName" Text="Name" maxlength="50" CssClass="text_field" runat="server"></asp:TextBox>
I am building a simple support call system and part of the system requires that the engineer go in and update any calls he/she is working on. What I was wanted to do was make it so that when the engineer types in all his info and then hits update, the formview not only posts the data he/she has added to the database but also then sends an email to the user with the updated details.
View 2 Repliesi have a form which allows the user to key in the data and then submit.
if everything works well on this action result, then i will redirect the user back to a thank you page.
my problem right now is that when the user click on the back button, they will be able to go back to the form page and the inputs will still be there.
and if the user just click on submit again, i will be getting some potential weird bugs.
so in terms of asp.net mvc, what's the best way to handle users who click on the back button?
I have a simple form on an ASP.NET MVC site that I'm building. This form is submitted, and then I validate that the form fields aren't null, empty, or improperly formatted.
However, when I use ModelState.AddModelError() to indicate validation errors from my controller code, I get an error when my view is re-rendered. In Visual Studio, I get that the following line is highlighted as being the location of the error:
<%=Html.TextBox("Email")%>
The error is the following:
NullReferenceException was unhandled by user code - object reference not set to an instance of an object.
My complete code for that textbox is the following:
<p>
<label for="Email">Your Email:</label>
<%=Html.TextBox("Email")%>
<%=Html.ValidationMessage("Email", "*") %>
</p>
Here's how I'm doing that validation in my controller:
try
{
System.Net.Mail.MailAddress address = new System.Net.Mail.MailAddress(email);
}
catch
{
ModelState.AddModelError("Email", "Should not be empty or invalid");
}
return View();
Note: this applies to all of my fields, not just my Email field, as long as they are invalid.
After submitting a form, i would like to read that it is actually there, before giving my succesfully submitted message. How would i go about checking that in the easiest way?
View 4 RepliesIf I were using PHP I could submit a form to a new page, or the same page, and get the posted variables by doing something such as $_POST['txtVariable'], how do I do the same thing in ASP.NET? And is it possible to have more than one form per page?
View 4 RepliesI have created a form with Field Validators for visitors to fill out on my website. When the form is submitted it inserts a record into a SQL database, sends an email notification and opens a Modal Popup. In the Modal popup are links where visitors can then download trial software.
My problem is that even if the form does not validate correctly, so there are no errors, the Modal Popup is still displayed. Does anyone know how I can make it so the form has to validate correctly before the Modal Popup will be displayed? I am somewhat of a newbie to ASP.NET,
If I have a large amount of fields/data on the Form, what's the strategy to organize or break them down within Form? or There
is other approach to develop rich experience form submission.
An outside vendor did some html work for us, and I'm filling in the actual functionality. I have an issue that I need help with.
He created a simple html page that is opened as a modal pop-up. It contains a form with a few input fields and a submit button. On submitting, an email should be sent using info from the input fields.
I turned his simple html page into a simple aspx page, added runat=server to the form, and added the c# code inside script tags to create and send the email.
It technically works but has a big issue. After the information is submitted and the email is sent, the page (which is supposed to just be a modal pop-up type thing) gets reloaded, but it is now no longer a pop-up. It's reloaded as a standalone page.
So I'm trying to find out if there is a way to get the form to just execute those few lines of c# code on submission without reloading the form. I'm somewhat aware of cgi scripts, but from what I've read, that can be buggy with IIS and all. Plus I'd like to think I could get these few lines of code to run without creating a separate executable.
I have my code behind from my webform and it does everything but write to the database. The form comes up I can fill it out then click the button and it takes me to the .aspx page but no entry in the database. I can't find what I am doing wrong.
using System;
using System.Data;
using System.Data.SqlClient;
namespace orderfinal
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSave_OnClick(object Src, EventArgs E)
{
if (Page.IsValid)
{
// Define data objects
SqlCommand comm;
// Open the connection.......
I am having problem with multiple clicks on submit button. Multiple clicks cause duplicate record insertion in database. On the form, I have used validation controls. Also I have to make some validations at server side, so I can't use javascript to prevent multiple clicks.
View 15 RepliesI have created a submission form on a webpage with Field Validators that visitors will fill out in order to download a trial software. I currently have the form inserting a record into a SQL database, sending an email, and opening a Modal Popup. When the Modal Popup opens, the visitors are then able to click on a link to download the software.The problem I am having is that even if the form does not validate correctly, so there are no errors, the Modal Popup still comes up. Is there a way to not have the Modal Popup show unless the form is validated correctly?
View 13 RepliesCurrently I have a comments section integrated into a blog I am writing. The comments are Ajaxified, when you post a comment the comment list auto updates with the comment you just added. Everything is working great but I would like to do some cleanup after a comment is successfully posted. Specifically I would like to disable the textarea and submit button which I would have no issues doing through javascript by using the AjaxOption OnComplete parameter. To avoid double posts or just plain abuse. I know I will need other safegaurds as well but this is my first step. The thing is Ajax.BeginForm does not give the form an id or name so I can not reference the form in javascript. Is there a workaround here? Can I disable these form controls from the controller?
Here is my code.
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I want to generate a unique random number everytime a user submits a form. As the form is submited the data of the form should be placed in a database and a unique random number should be generated so that the user can later use this unique random number to reterieve his details from the database that refer to his unique random id. The unique random number should be atleast 9 digits long.
View 3 RepliesI have a simple form that uses jQuery validation to notify the user of input errors, etc. When I add an ASP.NET CustomValidator to the form, it causes the page to postback and skip the jQuery validation. I need the form to not be submitted to the server until the client-validation is correct. Has anyone seen this before?
This is my form:
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I have entries for an enumeration stored inside a database table with only the following fields: ID and Name. I want to show the values stored inside this table inside a DropDownList on a form. The user then chooses a value and submits the form.
I found a way to easily create a DropDownList from an enumeration (although it would probably be best to just populate the DropDownList with the Name fields of all the records in the table). However, I haven't found a way to later bind the DropDownList in the form submission to an integer value to put into the database (FK - PK) with the other form values.
is it possible to fetch DropDownList content via AJAX and have it be put into the DropDownList and into the SelectList in the ViewModel (with both the ID and Name parameters)? I want to selectively fetch content based on an input the user makes and I want the ViewModel to then be filled with that fetched data.
