Net - Casting A Request.Form Control From Code Behind?
Oct 15, 2010
This seems really simple, but for some reason Im stumped.Im dynamically generating an HTML Select Box, lets call it myselect. Im creating this select box based on some database values Im generating an HTML Select Box.. almost like a string that Im just spitting out to the page. So it's never a control in the codebehind, just part of a string thats rendered as HTML by the browser. If I submit my form, and in my codebehind I perform:
Dim myVal as String = Request.Form("myselect")
That code will give me the VALUE of the myselect select box. How can I refer to this control to cast it as a System.Web.UI.HtmlControls.HtmlSelect control? Request.Form seems to give me the value, but I want to reference the object itself..
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Mar 29, 2012
Im trying to send data from a Windows Form to an aspx page and send back a response. Im running around in circles trying to make this work. The data im trying to send is 4 strings. So fare I have this in my code, using the build-in webclient in visual studio 2010, in the windows form sending to the aspx
[Code]...
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Jul 6, 2010
My Request.Form keys are all prefixed with ctl00$container name$ and then the key I want.How can I get the regular key name working?
Visual example from the immediate window:I want to use:
? request.Form.Item("stationIdea")
but it won't work because the key is:
ctl00$content_innovation_body$stationIdea
as retrieved by
? request.Form.Keys("4")
so only this works:
? request.Form("ctl00$content_innovation_body$stationIdea")
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Apr 27, 2012
I have tried everything to no avail. I need to cast the value from a user selected dropdownlist to another dropdownlist on another page. The data in the textboxes are a series of numbers. Also is there a way to display the value in the second dropdown list as well as other values? For example, my dropdown has the values 1-6, user selects 4, which displays first in the dropdown on page 2 but the other values also display in case they want to change there selection??
If Not Page.PreviousPage Is Nothing Then
Dim table As Control = PreviousPage.Controls(0).FindControl("table1")
Dim ddl As DropDownList = CType(table.FindControl("ddlB_Codes"),c DropDownList)
[code].....
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Jan 19, 2010
i saw this article on msdn forum about Request.UrlReferrer but didnt really understand it well. I need to use this property in one of my pages to see where the user is coming from. My case is if the user comes from certain page, i need to have an if condition and should open up a popup as well as redirect page to next page. if the Request.UrlReferrer is null then i dont need the popup, just goto next page. can somebody put a sample code snippet here?this is what i have so far -
Public ReadOnly Property URLReferrer() As uri
Get
End Get
End Property
i am not sure what to put with the Get and End Get.
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Dec 22, 2009
It's just before while I found that expression (see my signature) is possible, so this request is not about what 'I am missing', but what I can think of. It would be nice to have named sections of code in visualbasic, which would replaced almost everything you can miss about GoTo. Imagine this:
Section Compression
For Each item ...
If Not item IsV...
[code]....
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Jun 10, 2009
I am getting an error 12002, which is Request Timeout.I would like to know what its default timeout is.
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Feb 25, 2010
I am sending xmlhttp request to a web server with parameter, and wait for the response before I send another request. About 98% the application is working fine, except if the internet speed became suddenly slow or there is a delay from the web server i am dealing with.
here is how I am doing it,
Public _xmlHTTP As New MSXML2.XMLHTTP <-- declared in a module
Function SendRequest
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Jan 8, 2011
I have a form that I have been getting submissions that have punctuation and special characters that trigger the potentially dangerous Request.Form value error. I have been trying use the httpUtility.htmlencode and Server.htmlencode method to sanitize textboxes and textareas.All my tests do not fire because the built-in request validation of the 4.0 framework prevents the code-behind from executing to perform the sanitization. I have included the ValidateRequest in the page header but no matter what I set it too it still does the same thing.
This is the code I have so far.
Session("RequestID") = Server.HtmlEncode(txtRequestID.Value)
Session("FirstName") = Server.HtmlEncode(txtInstFirstName.Text)
Session("LastName") = Server.HtmlEncode(txtInstLastName.Text)
[code]....
What can I do to make this work? According to all the websites I have visited it should work.
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Dec 19, 2010
How can i retrieve the HTTP Request generated by the web browser control in .net (3.5). When the user navigates to an html page it may contain images, for every image the web browser control needs to make a HTTP Request. I want to display all HTTP Requests made by the web browser control. Does the web browser control use the httpWebRequest / httpWebResponse Classes internally? if so how can i access these objects?
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Feb 16, 2011
I am in need of being able to show a user the contents of a Oracle stored procedure. I have no idea of how to go about actually getting and then displaying the code contained in a stored procedure. Does anyone know of a way? I know how to call and execute a stored procedure but is about it. I am developing using VB.NET 2010 with Oracle 10G as my back end.
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Jun 11, 2009
how to get http url request made by ajax page in webbrowser control?? i am navigating one ajax website in my webbrowser control. on one webpage there is one button which when click send http request to page, but this request is ajax, i want to capture that url whose request is send after clicking. is it possible. i think its possible coz when i use http debugger utility in mozzila called "HttpFox" it display that url.
i try to hack dom of webpage and scrap url form it but i found that the url is created by javascript variable.
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Jul 21, 2010
I put the control in the form every thing works fine, but the problem is the priority of the sequence that the code performs for example:In the Cancel Click event there are some code inside the control it self, and in the form which hold the control I also put some code it goes fine but it first perform the code in the form and then it perform the code in the control.My question is there a way to tell the click event to perform the code inside the control first and then the code inside the holding form, (priority sequence)
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Jul 12, 2011
I'm using it for my webbrowser I plan to make my own image viewing area and it could aid my downloader.I've googled a bit and got nothing of use.My Site -[URL] Image Hosting File Hosting 1GB Limit per file Unlimited Files Delete Files File Passwords(Optional)
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Oct 7, 2009
I made a UserControl with a button on it. I then added that UC to a form by dragging from the toolbox. Now I want to be able to access the click event of the button on that UC control in the form code. How do I do that?
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Aug 1, 2011
I have written a HTTP server in VB.NET but I don't know how to use the Request.Form() method on a windows application. I need it to read HTML data sent in a HTML form.
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Oct 7, 2010
I hope this is in the right category. If its not, direct me for where it should go. I'm quite a, what you would call "noob" to visual basic. I'm trying to make a web-based (LOCAL ONLY) Tech Request system for my LOCAL machines (Only 1 noted for use). I want a login area (I think I know what to do for that.), a open request area, a OPENED requests area, a way to CLOSE requests (by staff only), and and started/not started field for staff to use.
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Apr 3, 2009
I have a form that have many text fields and all are being validated, I also added the NiceEdit plugin to be able to format text in my text areas, but it is raising errors like:
A potentially dangerous Request.Form value was detected from the client Now I can simply go to the top of the page and in the page directive add ValidateRequest="false" but this will deprive me from all the validation that I really need, so how can I switch validation OFF for my text areas ???VB.net, ASP.net 3.5, VWD 2008 Express...
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Oct 29, 2011
I am trying to get values from a select multiple box like this but the breakpoint at 'For Each Item in box' is nothing, what am I doing wrong?
[Code]...
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May 5, 2009
When I use Request.Form("myInput") and the input field "myInput" is blank, I get a server error.
How do I handle this?
Is there a way to check if "myInput" has not been filled?
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Jul 30, 2011
How can one pass http get or post methods to a windows application? I require a webserver to send a get method to my windows form application that will querry a database then reply back to a webserverI'm developing a windows based search engine that searches a MySQL database. It receives a keyword from an SMS gateway software as a HTTP get request and should reply to the gateway software using the same HTTP request.This is my code. It is correctly searching the database but I don't know how to receive the get methods on the application however it's sending the messages to SMS gateway.
Private Sub bSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bSend.Click
Dim request As HttpWebRequest
[code].....
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Feb 4, 2011
why I am getting the following error? I have debugging enabled.Server Error in '/' Application.A potentially dangerous Request.Form value was detected from the client (strContent="<p>test</p>").
Description: Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted. This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack. You can disable request validation by setting validateRequest=false in the Page directive or in the configuration section. However, it is strongly recommended that your application explicitly check all inputs in this case.
Exception Details: System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (strContent="<p>
test</p>
").
Source Error: The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:
1. Add a "Debug=true" directive at the top of the file that generated the error. Example:
<%@ Page Language="C#" Debug="true" %>
or:
2) Add the following section to the configuration file of your application:
<configuration>
<system.web>
<compilation debug="true"/>
[code]....
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Jul 5, 2010
I have recently started using Request("key") instead of Request.QueryString("key") to access my querystring values. However I have read that:
'Gets the specified object from the System.Web.HttpRequest.Cookies, System.Web.HttpRequest.Form, System.Web.HttpRequest.QueryString, System.Web.HttpRequest.ServerVariables'
Therefore, if I have a querystring key and cookie key which are the same, which value is returned?
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Nov 8, 2010
I use... $.post("/StoreHtml", { 'html': $("#txtHtml").val(), , function (data) { }); to store html user enters, but method above fails with an "A potentially dangerous Request.Form value was detected from the client". How do I encode the html before sending it? ... and how do I decode it in vb.net?
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Mar 17, 2010
I'm noticing this error more and more in my error logs. I've read through the questions here talking about this error, but they don't address what I would like to do (see below).
I'm considering three options, in the order of preference:
1) When submitting a form (I use formviews almost exclusively, if that helps), if potentially dangerous characters are detected, automatically strip them out and submit.
2) When submitting a form, if potentially dangerous characters are detected, alert the user and let them fix it before trying again.
3) After the exception is generated, deal with it and alert the user.
I'm hoping one of the first two options might be able to do somewhat globally...I know for the 3rd I'd have to alter a TON of Try-Catch blocks I already have in place. Doable, but labor intensive. I'd rather be proactive about it if at all possible and avoid the exception all together.
Perhaps one approach to #1 would be to write a block of code that could loop through all text entry fields in a formview, during the insert/update event, and strip the characters out. I'm ok with that, but I'd rather not have to heavily alter all my Insert/Update events to accomplish this. Or maybe I just create a different class to do the text checking/deleting, and only insert 1 line of code in each Insert/Update event. If anyone can come up with some example code of any of these approaches that would be a
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Sep 22, 2009
I used to use windwos.form.webbrowser along with cast of its activeXinstance to shdocvw's webbrwoser to get the newwindows event to force new windows in another tab instead of popup. also capture right click new window requests to another instance of browser in another tab but keeping the security context
[Code]...
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Sep 4, 2009
we are making our program in other computer it runs, without errors, but then when we transfer the program to another computer it has an error that says
An error occurred creating the form. See Exception.InnerException for details.The error is: Request for the permission of type
'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
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Mar 18, 2011
i have created an app to load an access database into a datagridview, which contains web urls. When button is clicked it webbrowser1 navigates to each url and each webpages document.inertext is put into textbox. This all work fine but after a while the webbrowser navigation becomes increasingly slower.
For Each RW As DataGridViewRow In Me.DataGridView1.SelectedRows
'''''''''''#######cell values into strings ########''''''''''''''
If RW.Selected = True Then
Dim domain As String
[code]....
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Jan 17, 2010
I hoping to find a current and simple way to do this. I'm using VWD Express 2008 and SQL Express 2008.I'm able to get the client's path to the image file using an asp:FileUpload control on the web form.
How do I upload the client's image file and display it in the web form's image control?How do I save it to the sqlserver? The image table is already set up with a "Image" data type column. Can the image be saved to the database as simply as other data types?
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Feb 15, 2011
find a current and simple way to do this. I'm using VWD Express 2008 and SQL Express 2008.I'm able to get the client's path to the image file using an asp:FileUpload control on the web form.How do I upload the client's image file and display it in the web form's image control?How do I save it to the sqlserver? The image table is already set up with a "Image" data type column. Can the image be saved to the database as simply as other data types?
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