C# - Prevent Entry Of HTML Into Web Form Textbox?
Sep 2, 2010
I have several text boxes in an ASP.NET Web Form. I want to ensure that users are not entering HTML into those text boxes. However, I'm not sure how to prevent HTML from being entered. Because of this, I decided that I want to only allow alphanumeric characters, spaces, exclamation point, sharp sign, dollar signs, percentage signs, carets, stars, and left and right parenthesis. I'm omitting the ampersand because I do not want them entering something like "<script&rt;..."
View 4 Replies
Similar Messages:
Apr 13, 2010
I usually use HttpUtility.HtmlEncode and HttpUtility.HtmlDecode for this but my fear is that someone injects some nasty javascript, I encode it before committing it to the database so it doesn't harm me but the next person who pulls up the page, gets the javascript because I decode the HTML before rendering the page.
What's the best way to handle this in public facing websites?
View 1 Replies
Mar 18, 2010
how can i passing a value form ActionResult to html.textbox or Html.TextBoxFor in View
View 2 Replies
Feb 16, 2010
I want to prevent the entry of two characters together but I want the user to be able to enter one or the other as well as use the enter key. I would like to use a white list instead of black listing characters. The regular expression also needs to support a min and max length. I'm doing client side validation using the asp:regularexpression control. I do not want to have to do server side validation unless that's the only solution to this problem. Has anyone else run into this?
Here is the regex I'm currently using:
(?!.(&#))^[a-zA-Z0-9!@#$%^&_=+~''"";:,
.()?-]{1,1000}$
I'm using a asp.net textbox that is set to multiline so I have to allow for
and or what's the point of using a multiline textbox :)
I want to keep the user from entering &# together but allow them to enter text with & or # in it and allow all of the characters a-zA-Z0-9!@#$%^&*_=+~''"";:,
.()?-.
A valid text entry would be as follows:
I have a question about my order. The order number is 12345.
An invalid text entry would be as follows:
I am trying to keep the user from entering &# in the textbox, but I want to allow them to enter & or #.
View 1 Replies
Mar 18, 2010
I have a text box (txtbx1) and a button(btnadd). Id like to use a regular expression validator or of some sort to prevent the user from continuing on the form unless its a number entered.
View 7 Replies
Jan 9, 2011
I have a 'City' TextBox on one of my web pages but people from many European countries sometimes prefix the city name with the postcode instead of putting it in my dedicated 'Postcode/ZIP' TextBox. I have therefore just added a new RegularExpressionValidator to this TextBox. Its purpose is to prevent the user from entering any numeric characters but allow everything else. After browsing for a suitable regex (I am not a regex expert), I found the following code that was claimed to do what I want.
ValidationExpression="^D$"
Unfortunately, the RegularExpressionValidator does not work as expected. Instead of just rejecting numeric characters it appears to reject everything! Where might I be going wrong?
View 2 Replies
Oct 26, 2010
I am using forms authentication on ASP.NET. If I try to access a page by copying the query string and pasting it into the browser, it allows me access to the page. How can this be prevented? I want the user to always have to login.
View 4 Replies
Jul 29, 2010
Is it possible to setup the CreateUserWizard to check for a duplicate entry in the aspnet_profile table (for a custom field) before the new user is created? For example, if I added a phone number field and wanted to make sure nobody else could create an account using that same phone number if a user already has an account with that phone number in the aspnet_Profile table's PropertyValuesString row?
View 10 Replies
Nov 8, 2010
When I use RequiredFieldValidator inside a DetailsView control field template, it automatically prevented DetailsView from inserting new records into the database, when triggered. JavaScript was disabled.
I'm a bit surprised and I'd like to know whether this is caused by the validator or is there a built-in feature in DetailsView that prevents database from being updated if some validators on the page are triggered?
If so, how is it possibly implemented (e.g. inside when eventhandler)?
View 1 Replies
Jan 1, 2010
I have a multiline asp.net textbox. I want to save its value at run time in html format. for example i write in run time.
Hi there....how are you?
but when i get this value back it shows me like this
Hi there....how are you?
which means it removes <br> tag.
View 11 Replies
Sep 4, 2010
it's a simple question and yet i couldn't figure how this works.I created an aspx page without any master page.Put one text box on the form.then use Internet Explorer 8 and visit that page.typed something and hit ENTER on the keyboard. The form submits (judging by that page being refreshed). I didn't even put any buttons on the form. Just the textbox. What triggers the postback?I further added one < asp:Button > next to the textbox and wired the button to see if it's been clicked.
i repeat the same thing, typed something in the textbox and hit ENTER on the keyboard. The form submitted but the button wasn't click. What's happening? How the postback is triggered if it's not from the button?
This is happening in Mozila Firefox too except that when i added a button on the page, the button will be hit when ENTER on the keyboard is pressed.Can anyone shed some light as to why the button i added didn't respond to the ENTER on the keyboard in IE8?
View 1 Replies
May 30, 2010
provide tutorial/code sample on the most elegant and simple design in ASP.NET 3.5 for data entry forms (Select/Insert/Update/Delete)?
View 2 Replies
Oct 18, 2010
The problem: I have a data entry form. I would like to save the data without page roundtrip or UpdatePanels.The solution: - the 'Save' button calls a javascript function which serialize all the fields content (client side)- the javascript function calls a web method (server side)- the web method deserialize the data and save it to the database.
View 2 Replies
Aug 26, 2010
I have a form written in C# with a SQL database to hold the data. At the end of the form, there is a DropDownList control that is blank upon the initial entry. If a user selects anything in that drop down box, upon saving the form, a new form with the same format will be created and the last form will be locked for editing. I have no idea on how to implement this or how to start on this.I'm kinda new to ASP.NET so bare with me please.
View 8 Replies
Sep 20, 2010
While converting a desktop application to a web app, I've run across my ignorance when attempting to implement a multi-column data entry form using CSS. I'm resolved to avoid using tables for this type of thing, and while I found a good reference to laying out a data entry form, I can find nothing that applies to multiple-column layouts like this one:
http://i.imgur.com/qAYbv.png
View 3 Replies
May 24, 2010
I have 2 dropdowns on my page, i can select from both and complete the other text fields on my form and click my button to submit. But when i receive the email, i get everything from the form, except that the drop down values are coming across as the default value of "0"
Here is my dropdownlist code i have on my page_load to bind them with data when they arrive at the page.
[Code]....
And for the email portion, i am using the selectedvalue as seen below. Thats all i have on the page.. very simple, but only the drop downs are not passing in the email.
ddlCategory.SelectedValue.ToString() and
ddlPriority.SelectedValue.ToString()
View 2 Replies
Apr 20, 2012
After I developed the system by usin vs2008 , my supervisor asked me to develop form in the interface so they can enter information about projects as(project code,project title, country,sector,year) to the database with out dealing with the database in the backend .. so how can i develop it because i am still new to the vs.
View 1 Replies
Mar 23, 2011
1. Need a textbox for time entry
2. This should be previously formated to enter the time like 11:30 this should display like : in the text box and when user enters the hours and minues, it should automatically adjust with the entry.
View 2 Replies
Dec 6, 2010
i need textbox that is only entered money value. my code is below:
[Code]....
[Code]....
View 2 Replies
Jan 25, 2011
When i click a button i want to be able to select the last entry in the db and set it to to a text box
this is my code
con.Open();
cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "select Top 1 Teacher_ID from Teachers order by Teacher_ID Desc";
SqlDataReader reader = cmd.ExecuteReader();
IDTXT.Text = cmd.CommandText;
reader.Close();
cmd.ExecuteNonQuery();
con.Close();
As ya can see i can only set the text equal to the statement and not the return value
View 2 Replies
Dec 16, 2010
I am writing an application that collects Customer Complaints and stores them into a database. I want to keep it simple so that the Managers without much web knowledge can use it. This is how my Entry Form works. The Manager selects the name and id of the staff by choosing a location. This loads ids and names of the Staff in that location from the database. Then the Manager rates the complaint based on the severity and enters the comments. I was able to use Session objects to get all these values from the Entry page to the Confirmation page so the Managers can check again. This is where it gets tricky. If there is a correction they have to make by trying to go back to the Entry page, the values are lost (esp. Drop-down ones).
View 6 Replies
Jun 27, 2010
I've got my validation wired up through my Service layer, and my Birthdate property looks like this.
[Code]....
The client side validation works properly if I input something like `12/12/1990` but when the form is submitted, the server side validation trips and I'm told the entry is invalid. I'm using the jQuery-UI Datepicker to input the date, however when I disable the datepicker, the problem persists.Am I missing something here? I thought the client side and server side would be the same thing.If I remove
[Code]....
Then the form submits. It's obviously something to do with the Regex.
View 8 Replies
Jun 24, 2010
I am creating a system in ASP.NET VB whereby a user can enter data into a textbox and the data is populated into a label - easy right? Well, yes the first time is easy. But what I need is... kinda like Twitter, one textbox, multiple labels. Each entry into the textbox will populate a new label (an empty the textbox) without loosing the labels that currently hold data that has previously been entered.
View 6 Replies
Jan 12, 2011
I wanna to mask my textbox , so if the user enter the number one for example it formatted as 0000001 how to do this ,any number in 7 digits.
View 2 Replies
Jan 31, 2011
I have to create a simple application which scans, displays and stores the info from a barcode. I have been able to sort the scanning and display part of this application but I need to know how to store the infromation entered into a textbox to a database and then be able to display the stored data as a list at a later stage.E.G. Once the "STORE" button is clicked, the information/text within the textbox is stored to a database. Once the "VIEW STORED DATA" button is clicked, the stored information in the database is displayed as a list.I am a complete beginner when it comes to creating web applications using asp.net. Also, the type of database to use (i.e. sql, wamp.etc) and how to link it to my application is also puzzling.
View 1 Replies
