I am trying to prevent users from submitting ascii codes in a textbox using a RegularExpressionValidator.
This works fine and I am able to display an error.
However when the user clicks on another button on the page I get the "A potentially dangerous Request.Form value was detected from the client" error. Is there a way to prevent this?
I have a textbox with a calendar icon next to it. When the icon is clicked a popup form displays the calendar control. I have it set up where they can only select the week ending date(saturday) and that date is displayed in the textbox.
I want to prevent users from editing the textbox. I've tried using the readonly and enabled properties but that doesn't work.
How can I keep users from modifying the date in the textbox?
I need to stop users users using the browser back button and potentially submitting an old version of a form.
I'm storing a guid in a session variable and also writing the value to a hidden form field and then checking the session value against the hidden field value if a user does try to navigate back and submit an old form.
If the form is submitted and the user wants to complete a new copy of the form then a new guid is generated both to the session and to the hidden form field. Now, if the user decides to hit the back button a few times to get the old form and tries to submit it again, the page checks the current guid in session against the guid stored in the form field and it finds a mismatch and prevents the form being submitted.
This works as expected in Chrome and Firefox, but in IE6, when the user hits the back button to view the old form, the new guid value appears in the hidden field of the old form! This means the user can submit the old form again, which we definitely do not want.
i want when user click on submit button then a div layer will be generated over the textbox whose height and width will be just the same as textbox and in this way textbox will be blocked for entering something. i want to do it by javascript. in this scenario other textbox will not be blocked.
View 3 RepliesI 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$"
Unfortunately, the RegularExpressionValidator does not work as expected. Instead of just rejecting numeric characters it appears to reject everything! Where might I be going wrong?
In .net streams are by default encoded in utf-8. so what i want to do is to simply read the text in a textbox in which i paste the russian characters and then convert them to ascii. but when i debug the code then in my resulting string ? appears. how i can convert the string into its ascii equivalent. my code is given below
string inputString = txtName.Text;
ASCIIEncoding ascii = new ASCIIEncoding();
Encoding encoder = ASCIIEncoding.GetEncoding("us-ascii", new EncoderReplacementFallback(string.Empty), new DecoderExceptionFallback());
byte[] bAsciiString = encoder.GetBytes(inputString);
string cleanString = ascii.GetString(bAsciiString);
I have an ASP.NET TextBox with TextMode = TextBoxMode.MultiLine that is used within an AJAX Update Panel. The .Text value has been pre-set to a value that has multiple lines.
When using Chrome(7.0.517.41) or Firefox(3.6.11) working with the controls posted back value on the server the carriage return is lost if the user hasn't edited the pre-set value.
E.g.
Initial .Text value set when the page loads:
[code]....
I had a question on here for a RegularExpressionValidator which I'm relatively new to. It was to accept all alphanumeric, apostrophe, hyphen, underscore, space, ampersand, comma, parentheses, full stop. The answer I was given was:
"^([a-zA-Z0-9 '-_&,().])+$"
This seemed good at first but it seems to accept amoung other things '*'.
I have an text box i need to validate so that the user can enter enter up to four character and they can be alphanumeric. I am using VS2003, .NET 1.1.
what is the expression i should use to validate this condition
Tried like this:
<asp:TextBox id="wtxtTPP" tabIndex="2" runat="server" CssClass="text" Width="144px" MaxLength="4" />
<asp:RegularExpressionValidator id="RegularExpressionValidator1" style="z-index: 101; left: 208px; position: absolute; TOP: 16px" runat="server" ErrorMessage="RegularExpressionValidator" ValidationExpression="^([Ss]{0,4})$" ControlToValidate="wtxtTPP" />
<input style="z-index: 102; left: 88px; position: absolute; top: 72px" type="submit" value="Submit" id="Submit1" name="Submit1" runat="server">
I have tried everything and can't seem to wrap my head around it...I am trying to use the RegularExpressionValidator to validate that a asp:textbox has an '' in the value that the user types in, and it can't be the first or last character.
View 4 RepliesI have a multiline textbox (textarea) that I want to verify has a particular string in it. I was trying:
<asp:RegularExpressionValidator runat="server" ControlToValidate="txtTemplate" ValidationExpression="^(.s*)*Content(.s*)*$" Text="content" ErrorMessage="Must contain: Content" />
Using ^(.s*)*$ seems to pass for a textarea. So I tried to sandwich my criteria between two of these. But it seems to lock up both IE and Chrome.
I'm burning my brain for 2 days trying to make the RegularExpressionValidator message to apear inside of the textbox but nothing is working .
View 5 RepliesWhat whould be the best way to prevent multiple users on a page?
For example if a user is at the page "Home.aspx", no other users should be allowed to go there.
I'm using asp.net on the server and the js-frameword jQuery on the client side.
How to Prevent PDF Document from Being download to users PC? it can be viewed on browser but should not download the file to PC.
View 4 Repliesi have been writing a music website for my customer using ASP.NET. Everything has been cool except I don't know how to prevent the users from downloadng the song which is being played. For example, I click "Heal the world" to play and while the song is playing, I dont't want the IDM download manager or other download programs appear the download dialog
View 5 RepliesI am making a small file hosting website, and each user can upload multiple files, and will have access to just his files and can't access others files, for example by guessing the URL. Is there a way to secure files to have access by just the owner and no body else "may be website administrator also will have access"
View 3 RepliesI have a folder within my website called 'ProtectedPages' which contains pages which users can only see if they have logged in (MyAccount.aspx etc). If they bookmark that page and try to go to it without logging-in, they are immediately bounced to my login page.However, if I have text files, images etc. in there, then it seems users can get to these fine without the need to login - all they need is the URL. For example, I could send the URL http://mysite.com/ProtectedPages/MyAccount.aspx to a friend and he wouldn't be able to access it until he had logged in. However, I could send himttp://mysite.com/ProtectedPages/ATextDocument.txt and it would show it to him without any problems.How would I go about protecting ALL files within this folder? I have a web.config file within the ProtectedPages folder which just has this information in it (I don't want TrainingAdministrator's to have access to that folder at all)
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.web>
[code]...
I am using ASP.NET profiles with allowAnonymous="true". I am NOT using ASP.NET membership. I recently took a hard look at the aspnetdb database and noticed that although my site gets 600-800 unique visitors daily, there are 4000-5000 "users" being created in the database.
Clearly what is happening here is the users with cookies disabled end up creating a record for every request.
My question: How do I prevent user and profile database records from being created if the client doesn't support cookies or has them disabled?
How can we prevent non ahuthenticated users from like and dislike multiple times?one way : save Ip address in a cookiebut theres's two problem1. I heard Ip address isn't unique and changes frequently2. cookie can be deleted by userI'd .
View 1 Replieswhat is difference between server side submitting and client side submitting a form.
Can any one explain with an example.
I have a asp.net chech box control in the top of my page. I have a html table getting populated from DB on the page load. But, during the page load checkbox got rendered before the html table gets populated. So, the user is able to select the checkbox before the page completes the action and becomes unstable. My problem is, I couldn't disable and enable the checkbox after the page compltely loaded. As I tried this in the last line of Page_load event and also, using a Page_UnLoad event - no use. These events fired before I see the HTML table in my browser. Also, I tried in javascript (which is running after the html table populated), but there I could not enable the disabled check box.
View 9 RepliesI am implementing strightforward membership provider. I do not want new users to be able to login without being approved.
I have tried the setting on the registration wizard called DisableCreatedUser="True" and this does not work.
I also set LoginCreatedUser to False, and the user still gets logged in.
If I look in the SQL membership table, 'IsApproved' is set to 0 for the account, but they can still login.
suppose we've created a web app for our customers.
how to prevent to access web page code (aspx code or behind code) for our customers ?
how to implement security and licensing information for web apps ?
I have directories in my website which require authentication.
But when i type the url with the directory name it lets me see the files but doesnt allow access as users need to login.
How can i stop users viewing files if they manually type directory name in?
i have create web application for school management system...bt when i run my webside...(my welcome page is defaul.aspx bt if i want to acces studentdetail.aspx then i only enter url and i get studentdetail.aspx)
View 1 Replies
