C# - Access Webpage From .ashx WebHandler?
Jan 20, 2011
Is it possible, and if so how do you access the webpage from the webhandlers?
Basically, when i button is clicked i kick off some JavaScript, which then kicks off a C# webhandler which return data from the server. What i would like to do then is rather than feed it back to the JavaScript, id like to add a GridView directly to the webpage from the webhandler.
Equally, within the handler it would be incredible useful to be able to read values of dropdowns etc from the webpage.
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Jun 29, 2010
My web site has a handler (FileDownload.ashx) that deals with all file download requests. I've recently migrated my site to ASP.Net 4.0, and it now uses routing extensively. Everything works fine when dealing with page requests (aspx), but it's not working with my handler - I encounter the following error:
Type '<snip>.Handlers.FileDownload' does not inherit from 'System.Web.UI.Page'.
This makes sense, as routing is only implemented in the page. So, my question is, what steps do I need to take to be able to use routing and my ASHX together? I want to be able to extract RouteData.Values from the url.
public class FileDownload : IHttpHandler
{
}
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Jan 11, 2010
I have a web application that I upload an image to, the image is subsequently saved to the server's temp folder and displayed via a webhandler on the aspx page.
the code for the aspx:
<img src="PreviewImageQualityHandler.ashx" alt="Picture not loaded" runat="server" id="imagePreview" />
The code for uploading the picture and adding a unique id to the Session:
protected void uploadButton_Click(object sender, EventArgs e)
{
if (FileUploadControl.FileName.EndsWith(".jpg") || FileUploadControl.FileName.EndsWith(".jpeg"))
{
string tempFileName = Path.GetTempFileName();
[Code]....
My problem is that the webhandler only fires on the first image-upload. If I try and upload a new image, the webhandler never fires.
If I remove everything to do with Session from the webhandler it fires on every single postback, like it should.
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Oct 4, 2010
I have a website running on IIS7 in integrated mode (framework 4). I have added a <handler> to deal with page requests.
my web.config
[Code]....
my dll
[Code]....
When i run site.aspx in my browser, it loads for about 20 seconds, and then I get "Connection was reset" / "Webpage cannot be displayed". Google Chrome returns "Error 101 (net::ERR_CONNECTION_RESET): Unknown error".
It works well in the VS2010 development webserver. It works on IIS if the handler is an appcode cs file, but as soon as I move to a DLL, i get this error. After attempting to load the page a few times, the app pool crashes and has to be restarted.
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Oct 28, 2010
I have heard that a webhandler is more efficient when buffering images in a webpage....I've tried a couple of times but I never seem to get it right This is the codebehind in ViewImg.aspx.csHere's the code:
[Code]....
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Jan 18, 2010
In my project there is webhandler to create image and display it in all pages of site like below.
<img id="imgpro" runat="server" ImageUrl="/images/imagedisplay.ashx?ID=<%#Eval("ID") %>&Table=ProductPhotos&Thumbnail=true&DefaultImage=true" AlternateText="<%#Eval("Name") %>" />
Now I want to create a thumbnail from image which will create from above line code.
i don't want to change the code for webhandler because it will reflect in all other pages.
how can i create thumbnail from that image in particular page in which webhandler called.
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Oct 6, 2010
I've a problem with my web application. I hosted a web site in IIS and initially its working good. After sometime ( i dont know the time diff exactly ), if i try to access my page its not working and after re-starting my application only its working. Let me explain about my project.
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Jan 21, 2011
I am working with a client who wants to make his current MS Access 2007 Reports available on demand in his web site. Currently, as I understand it, the managers of the company are being required to actually load MS Access and the active database to run the reports which exposes all of the data and linked tables to people who have no reason to modify them. So my client just wants them to be able to log into the admin section of the company website and request a report which he has already built in Access. I am trying to figure out how to get those reports to an ASP.NET application for the website to consume.
I have already spent a day looking at the Microsoft.Office.Interop library, and I don't think that that will cut it because I can actually get the HTML for the Report directly out of the application. All I can find is an option to save it to the hard disk which is inelegant and could easily cause problems with filename changes when I try to then load the document from ASP.
What I would like to see is a solution by which I can load the mdb or accdb file into the ASP application, access the Reports as a container and select the one I want by name, and then run it and collect the output in HTML to then simply echo to the webpage. Is there anything out there that can:
// Psuedo-code
Dim AccessFile As MSAccessFileOperator
Dim Reports As List(Of MSAccess.Reports)
Dim htmlResult As String
AccessFile = New MSAccessFileOperator("myDatabase.accdb")
Reports = AccessFile.Reports
htmlResult = Reports("MyReportName").toHTML
I haven't found such a method yet, and I am okay with the idea that maybe it isn't possible to do it that easily, but, at the end of the day, I need the HTML result of the Report to exist in memory as a String.
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Jul 22, 2010
Is it possible to configure web.config to authorize a page to be only read locally (similar in concept to the RemoteOnly feature for error messages).
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Nov 30, 2010
I have an Access db on webserver. In my ASP webpage I need to return the sum of rows which match criteria.
I am not sure where the sum needs to happen. I tried sum in the sql statement, but got an error when it tried to put it in asp page.this is what I have
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Mar 11, 2010
I have a webpage errors.aspx that needs to be protected from direct access. I want it to be accessed only when redirected to by another web page.
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Mar 8, 2010
Trying to figure out how to programmatically access the web pages in the application. Just something simple like a list of them would be awesome. I know I can create a list but I was wondering if there was something that could 'look' at the pages and add a new one to the list if you make a new page for the application.
Example with 7 pages:
Error
Default
Login
Content
Users
ContactUs
Admin
I am half awake so I may be a little unclear. Maybe puting it all in a single question will be easier.
How do you autogenerate a list of all webpages in your current application?
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Jul 2, 2010
I'm building a website that just allow each person in my office to access the page from their own PC placed at the office only. It looks like I need to identify a client from within the codes on the ASP.net web server. How can I do this?
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Sep 27, 2010
on my vistual studio 2010 I can see my project by [URL]
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Jul 21, 2010
I am wanting to build a asp.net page where the user is presented with drop down boxes.
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The access database contains more than 5 tables.
For example, I am going to use a customer website database as an example:
Contained in the database is:
Server Name
Server Type (Shared web or Dedicated)
Customer name
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Funtionality:
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Jan 18, 2010
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It works fine if I publish it on winXP.
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Oct 22, 2010
i am trying to update my database via a textbox on my web page.
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Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
Try
' cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and SettingsAshMyDocumentsplatypus_holidays.mdb;") 'Connection String
cn.Open()
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Catch
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End Try
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cn.Close()
End Sub
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I Have a webpage named "Test.aspx" and a web user control named "TestWebContro.ascx",..
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<table border="0" cellpadding="0" cellspacing="0" style="width: 100%; background-color: White">
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Parser Error Message: Unrecognized attribute 'requestValidationMode'. Note that attribute names are case-sensitive.Line 31: <system.web>Line 32: <httpRuntime requestValidationMode="2.0"/>Line 33: <trace enabled="true" requestLimit="40" localOnly="false" />
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I set up a secured folder in my website. When I access this folder via web page, it pop up a windows login form to ask for user name and password. I would like to code the asp.net page or java script to access this secured folder with username and password without pop up the login form. find the method for asp.net page accessing the secured folder automatically.
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Mar 24, 2011
I need to create dynamic radio buttons in my page, and then access their values in postback
I create the buttons using the following code:
[Code]....
In the post back I try to access the radio buttons using their created ID:
[Code]....
But it seems that the find method is never finding the Radio button control.
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Sep 18, 2010
what is the recommended data access strategy for the following environment: single stored procedure, many parameters, asp.net 4.0, sql server 2008, and the stored proc returns 11 different recordsets, all of which get displayed in various different elements too complex and specific to be handled by server controls.
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