Web Forms :: Framework Stops Submission Dead In Tracks Before Code Can Run
Jan 6, 2011
Ever since we have moved to the 4.0 framework one of my apps now reports errors when users enter punctuation into the form. Which is a good thing, I do have a function in place that replaces all apostrophes with a double apostrophe but decided to beef it up by applying the httpUtility.htmlencode to the textboxes before I send it to a confirmation page that then emails the page to me and the person submitting the form. The problem is that the checks I have put into place to sanitize the textboxes don't fire because the 4.0 framework stops the submission dead in its tracks before the code can be ran. I have set the ValidateRequest="false" in the page tag but still no luck in getting sanitization to run. Is there something I am missing? From all I have read it should have worked.
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Jan 15, 2010
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.
[Code]....
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Oct 21, 2010
Some time ago I converted an old windows application to a web application. This web application works fine as a stand alone app. I was recently informed that my client had a new standard layout and they are using a master page. They sent me the master page.
The web application is quite basic in that it makes a number of calls to a web service to retreive a list of customer, retrieve list of products and allows customer to create an order containing products.
I did the following to get make use of master page:
Copied it to my solution Update the page directive to include the MasterPageFile attribute and set it to point to master pageAdded the relevant content areas to my page Copied my code (control declarations etc) into the relevant content areas.The application compiles correctly and renders as expected. However, it does not behave as expected.
For example, I display a list of customers in a GridView. The user can select a customer by clicking the select button that is present for each row in GridView. I do this once and select a customer the page is posted back and relevant row is selected. I select a different customer and the page it posted back but this time the selected row does not change. It is still shown as the first row i selected.
This functionality works as expected if i remove the master page attribute and content areas.
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Jul 27, 2010
I have a formview that I open to the edit template, some textboxes are not available and some are populated by dropdown lists, and the update function works fine.
As soon as I add some logic to the code behind page for the update control, the UPDATE link on the formview stops updating my DB.
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Aug 30, 2011
There is a Submit button on Order page.
Due to network traffic, sometime user clicks Submit button more than one time and cause a duplicate data was inserted.
How to void multiple submission in code page?
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Apr 20, 2010
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.
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Aug 5, 2010
I have a website that appears to be "losing" the code behind bin/dll file support while the application is running. I have added an OnError event to the application and am logging it to the event viewer. At first I was getting problems with HTML and other bad input into text boxes. I have used validation and other methods to correct all of this. Now my issue is that the ASPX pages are still served, however I have custom code in the "onLoad" event and it is not being executed. This is in the "onLoad" for the master page so it is affecting the entire site. So far my fix has been to restart the website within IIS. This corrects the problem for anywhere to 24-48 hours and then it occurs again. Last night when this happened I did not recieve any new information in the event viewer log.
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Aug 18, 2010
I am looking for a way to figure out the current URL that the page is currently on (NOT what the asp.net page currently is, but where the CODE is at). ie. My web app is located at: [URL] my code is: String page = [URL]
String response = GetResponse(page); //basically the above code goes to the website [URL] and parses the HTML within it and brings it back and populates the variable string "response". But, sometimes the [URL] throws me a curve ball and redirects me to: [URL] I want to be able to use a try/catch to be able to "catch" the error of a different page: ie validateUser.aspx. So, I need to do to this: try
{
String page = [URL];
String response = GetResponse(page);
}
catch
{
//code to check the behind URL to see if [URL] is the URL OR IF [URL] is the current URL
}
understand I know how to find the URL of the current page the web app is on. I need to find the current page that threw the exception during the execution of the code behind.
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Oct 30, 2010
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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Jan 10, 2011
I am using asp:ScriptManager and asp:UpdatePanel to populate a DropDown , and for every field need to display hits in div.In order to Implement the hint I am using JS, it works fine unless I started to populate a dropdown based on another one.
here is some code lines from page and JS
<asp:ScriptManager ID="sm" runat="server" EnablePageMethods="true"></asp:ScriptManager>
<asp:UpdatePanel runat="server" ID="up0">
<ContentTemplate>
<dd><asp:DropDownList runat="server" ID="CCategory" CssClass="lst" ValidationGroup="Property" AutoPostBack="true" onselectedindexchanged="CCategory_SelectedIndexChanged" /><span class="hint">Please choose a city where you want to or having a property.<span
class="hint-pointer"> </span></span></dd>........
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Jan 23, 2011
I'm using some JS to show some divs.The divs' content is set up in a MultiView control in the server. Depending on certain parameters, I trigger some postbacks to make the server select the appropriate view. The problem is that everything works if I keep the alert(1); below, but stops working if I remove it.
Here is the code. I have a button which its OnClick() calls ShowEditor(), with an element and a type. ShowEditor() makes the editor's div visible after raising a postback to let the server select the correct view in the MultiView based on the type. This works fine. The editor loads and there is a div inside (vwText_Text1) which I'd like to assign an OnClick event to. This only works if the alert() is present.
[code].....
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Aug 2, 2010
I have an ASCX component that has a lot of javascript declared in a script tag in the ascx itself. I can set breakpoints, and the debugger stops as it should, but the text that is highlighted in the debugger as the "current line" is nowhere near the actual javascript (it is much higher in the rendered file than it should be). I can "wing it" for one or two lines with the real code side-by-side with the "false" line of execution, but I lose all the hover abilities and everything else that makes javascript debugging useful.
I have tried putting the script at the top of my ascx file, but to no avail. I've tried not setting a breakpoint until the entire page is rendered, so that I have to scroll all the way to where the actual lines of code are, and the debugger still stops somewhere way above it.
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Nov 22, 2010
I've recently stumbled across a few blogs that say the ASP.NET Ajax Library is dead, in particular:
http://encosia.com/2010/10/04/understanding-jquerys-impact-on-microsoft-and-asp-net/
http://weblogs.asp.net/toddanglin/archive/2010/04/19/microsoft-ajax-client-library-is-dead-long-live-jquery.aspx Is this generally true, technically and practically?
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Aug 18, 2010
I have a few linkbuttons that each open the save dialog to let users save file to the local machine. But after any link is clicked the page is dead afterwards (nothing works) and page has to be refreshed.
So do I have to force refresh after download is complete or does it have to do something with postback?
{
StringCollection strValuesToSearch = new StringCollection();
strValuesToSearch.Add("findword");
string stringToReplace;
stringToReplace = TextBox1.Text;
[Code]....
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May 21, 2010
i have a website which has a <IMG> and/or <asp:Image> in it.
The user has an option to upload an image. so if the user does upload an image it will be displayed in the stated controls above. but if they don't the control displays its alternative text or an "x" icon. can i just place a default image in it if there is no image reference to it to display?
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Oct 11, 2010
I am currently trialing EF4 code-first. My POCO classes inherit from an Audit class that contains CreatedBy, CreatedOn, UpdatedBy, UpdatedOn. I was hoping the framework would include the Audit properties in my Action table when creating my database, however this doesn't appear to be the case. Does anyone know how to enable this without overriding the OnModelCreating() method?
Public Class Audit
Public Property CreatedOn as DateTime
End Class
Public Class Action
inherits Audit
Public Property ActionId As Int32
End Class
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Oct 21, 2010
This is from a very good book by Steven SandersonI am trying to follow the chapter 4 and trying to setup IOC on my mvc code from the code sample of the book but its not working.I follow the code from page 97 to page 101 where I set up Inversion of Control and run the code but I get the following error. A dialog box opens trying to search the following file:
c:TeamCityuildAgentwork1ab5e0b25b145b19srcCastle.WindsorWindsorWindsorContainer.cs
protected override IController GetControllerInstance(
System.Web.Routing.RequestContext requestContext,
Type controllerType)
[code]...
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Apr 26, 2010
we previously used to host our asp website using 2.0 framework.we developed our new code on our local machines using .net 3.5 and when we tried to deploy the code after installing 3.5 framework on the server we are getting the below error message
Could not load the assembly App_web_4tlvao-n
what wrong did we do or do we have to configure the IIS separately once again for the new code
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Feb 10, 2010
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.
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Apr 25, 2010
I have some code that I tweaked for a contact form that I have been using for years with no trouble. I recently upgraded my hosting account to IIS7 and upgraded the Framework and now my code isn't working. I don't know how to fix my code so that it works. Could someone look at it and tell me what I need to fix? I know it's a lot of code and the person that originally wrote it for me many years ago was kind enough to comment everything so I knew what was going on but with the upgrade I have no idea what is incorrect. The error that I am getting when the form is filed out and submitted is...
A Problem prevented your request from being accepted: The "SendUsing" configuration value is invalid.
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<%@ Page Language="VB" ContentType="text/html" ResponseEncoding="utf-8" %>
[code]...
'The first thing we must do is declare or "Dimension" the variables we will use. We will declare variables for each form field,and we will insert those variables into the text of the email message.
Dim strName as String = txtName.Text 'This will assign the text of the "Name" textbox to this variable
Dim strEmail as String = txtEmail.Text 'This will assign the text of the "Email" textbox to this variable
Dim strCity as String = txtCity.Text 'This will assign the text of the "City" textbox to this variable
[code]...
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Feb 14, 2011
I have a good friend who owns a print shop and he has asked me to create him a simple online shop where he can take print orders. His print shop location is kind of hidden, and business isn't going well at the moment. This is why he wants to move online. I said I would do it for him, but it will take a while before he has anything to look at. Where I am most stuck is the Model. The problem with this sorts of shops is that each Product, depending on its category would have different attributes. How ? Here is an example: [URL] A user would choose a product category, then he/she would get to the following: [URL] Now he/she would click the Order link to order a certain qunatity. On the next page, depending on what category they are in, they'll get a form where they can choose order attributes. There aren't many attribues for BUSINESS CARDS. But if they had chosen CARBONLESS FORMS, they would get options to tweak like: Squencial Numbering to start from 103490Position of Numbering..etc
I asked for advice at the SQL Server forums, and finally I came up with something like this:[URL] But with that database design, I will have a lot of type casting to do for the attributes ! << In fact I'm not sure if that would be even possible. Then I watched this video, and the author does something cool ! she uses Inheritance. Then I started Wonding ... Is it possible for me to have a Parent [ Product ] class, and have its children entities with different (added) attributes?
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Oct 15, 2010
Could anyone tell me where is the best place to put my business methods when using EF4 code first POCOs? Should they go in the POCO class? E.g.
public class customer
public property Id as int32
public property Name as string
public property Archived as boolean
public sub MarkAsArchived
me.Archived = true
end sub
public function EmailAllInvoices as boolean
...
end function
end class
Or should the POCO class be as clean as possible and a seperate class be used for business logic which accepts an instance of a customer POCO in the constructor to work on?
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Jan 19, 2011
I would like to have a short example on how do you actually perform relationships in Entity Framework 4 Code-First CTP 5 ?
Would love an example for these kind of relations :
* one-to-many
* many-to-many
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Sep 6, 2010
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>
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Feb 8, 2011
I been looking but I cant find any info on this topic Anyway I got a model that looks like this.
[Code]....
I want to cascade delete a category with all its sub categories but I cant make that reference in the database, not with the option to cascade update or delete. It work fine with pagecontents and all the other I got its just this same table reference. In NHibernate I do the cascade setting hbm or with a better way using the fluent option. How do I go about this task now?
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