Web Forms :: Bind Image Control With Captcha From Generic Handler Using JQuery

Jul 11, 2012

How can I bind image control with captcha from generic handler using jquery.

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AJAX :: HTTP Generic Handler For Captcha Image Not Working Inside Update Panel

Mar 23, 2013

I tried this link to generate verification Image [URL] ..... It works fine.

But I'd like to put a button in page for regenerating captcha for example. When the image was unreadable for user.

So I put an updatepanel in page and this is my code:

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<tr> <td colspan="2">
<asp:Image ID="imCaptcha" ImageUrl="~/Captcha.ashx" runat="server" />

[Code] .....

Although the image changes but the whole page is refreshed. Whether this is due to incompatibilities httphandler and updatepanel?

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VS 2008 - Unable To Display Image File From Database Into Image Control Using Generic Handler

Mar 18, 2013

I need displaying my image file stored from my database into the image control. I've had read some articles and watch video tutorial which there were perfectly working and I followed it but I wasn't able to make it work. The image control just displayed blank. I used Generic Handler to retrieve the image file from my database based on the articles and tutorials I've got. here are my codes below:

Generic Handler:

<%@ WebHandler Language="C#" Class="ShowImage" %>
using System;
using System.Configuration;
using System.Drawing;
using System.Drawing.Imaging;

[Code] ....

Asp.Net Code for the Image control:

HTML Code:
<asp:Image ID="Image1" runat="server" ImageUrl='<%# "ShowImage.ashx?ID=" + Eval("ID") %>' Height="128px" />

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Web Forms :: Read Image From Generic Handler And Allow Users To Download It

Jul 10, 2012

I am generating an image using handler and showing that image on image control. Now I want to download same image which is generated using handler. In my handler, I am passing imagepath and one querystring and retrieving some data from database and watermark that content to my image. How to download that same image.


protected void Page_Load(object sender, EventArgs e) {
if (Request.QueryString.HasKeys()) {
string Code = Request.QueryString["Code"].ToString();
Session["Code"] = Code;
imgCoupon.ImageUrl = String.Format("ImageHandler.ashx?ImageUrl=" + Server.MapPath("Images/coupon.jpg") + "&Code=" + Code + "");

[Code] ....

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C# - Dynamic Image (from Db) Using Generic Handler

Feb 9, 2010

I'm trying to using a Generic Handler to retrieve and display images that are stored in a database.

But its just not working. Ive tried verious of the code below, but I cant seem to get it to work.

<%@ WebHandler Language="C#" Class="IconsDb" %>
using System;
using System.Web;
using System.Linq;
using System.Data.Entity;


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Serving An Image With A Generic Handler Within A List View. Is It Possible

Feb 27, 2011

Currently in my webpage i load images to the ListView object as follows...

<asp:ListView ID="ListView1" runat="server">


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HttpHandlers / Modules :: Cannot Retrieve An Image Using A Generic Handler

Mar 26, 2010

I wrote a generic handler like this:


and on the other page I would like to retrieve the database image using :

<img alt="" src="ShowImage.ashx?ID=467711" />

but I am getting nothing in this case. The picture exists and there are 91000 bytes in array.

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AJAX :: JQuery Autocomplete Textbox With Generic Handler

Mar 19, 2012

I am using jquery autocomplete textbox with generic handler,my problem is i have four master page,in that master page i just take

query like this....

 <link href="../css/jquery.autocomplete.css" rel="stylesheet" type="text/css" />    
<script src="../Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>    
<script src="../Scripts/jquery.autocomplete.js" type="text/javascript"></script>     
<script type="text/javascript">  $(document).ready(function () {  
}); </script>

Suppose at the time of page add when i select master page ex(Default.aspx page with master page )then jquery autocomlplete texxbox is working fine ,but not working in  dynamic created .aspx page..one example

I display product in my default page when i select that product ,it will go to details page means (53-arts-photography-and-design.aspx productid , prodname and desc ) if u want code then i will send code.

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Web Forms :: A Generic Error Occurred In GDI While Generating Captcha?

May 7, 2015

I am getting exception on server when saving chapcha image in forder

A generic error occurred in GDI+. But is is working fine in local server without any error.

my codes .

using (Bitmap bitmap = new Bitmap(106, 35))
string imgCaptchaToSave = string.Empty;
string captchaText = Guid.NewGuid().ToString().Substring(0, 6);


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User Controls :: Captcha Control Not Showing Image?

Apr 17, 2012

I have implemented as writeen in the aritcle but the captcha image is not being shown when I run the application.why

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Web Forms :: Captcha Control Image Not Showing When Forms Authentication Is Used

Aug 18, 2015

I am using the ASPNET_Captcha control for my login page. It works fine. However when i implement the forms authentication, the catcha image does not appear. 

Do i need the location section in the web.config file? If yes can you share the details for the same.

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Web Forms :: How To Use Session In Generic Handler

May 7, 2015

i want to access session value after login ..temrory procedure i knw but i heard about ashx file to manage session so what is the method to use it?

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Web Forms :: Download File Using Generic Handler

May 26, 2013

I want to download any type of file on button click,so have created a .ashx page and redirected the .aspx page to the .ashx page.Is this way correct to do the task.Below mentioned code works fine.

<%@ WebHandler Language="C#" Class="Handler" %>
using System;
using System.Web;
public class Handler : IHttpHandler {
public void ProcessRequest (HttpContext context) {
var fileName = "Tracing.pdf";

[Code] ....

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Web Forms :: JSON Generic Handler With CallBack

Jun 16, 2015

I need to provide the json string as response to the request made using webrequst as : [URL] ....

Above request will come from other application using webrequest ...

How to implement the page(aspnet.aspx) which handles the request and gives the json string as response. I know how to made webrequest. I am struggling at server end. How to receive request and give response as json string.

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Web Forms :: Generic Handler Compilation Error VS 2005?

Feb 10, 2010

I have write a simple generic handler with VB as the language.

I am then trying to access the static properties of the handler via an aspx page using <%= handlerclassname.propname %> code.

However it is failing to compile. The compiler throws an error Name HandlerClassname is not declared.

I have checked in my code about namespace or something like that, but there aren't any.

Compilation option in web.config is


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Web Forms :: How To Do Fileupload (on Change) Using JavaScript Generic Handler

Jul 4, 2012

How can I do asp.net fileupload (on change) using javascript, generic handler? 

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Web Forms :: How To Resize Images Proportionally (aspect Ratio) Using Generic Handler

May 7, 2015

I have images of big size. I want to resize them according to their width and height. If width is bigger than height then maximum width will be 650px and height will in proportion of width. If height is bigger than width then maximum height will be 650px and width will be in proportion of height. How I will resize images proportionally using handler in ASP.Net,C#. 

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Web Forms :: Fetching Of Files Saved In Database Using Generic Handler Is Slow

Jul 8, 2013

I have used [URL]....

above method to save and retreve files from sql server database. I have uploaded around 50-60 images as jpg. But it taking so much time to get display online. but it's working faster when accessing from local database. 

There's the page where images are displaying [URL]....

Is the speed for images retreiving from sql database is  slower as compared to retrieving images from folder..?
.vb code:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
scroll = fillbannerpics()
End If
End Sub


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How To Bind Image That Is Saved In Filestream Database Sql Server 2008 To A Image Control

Jan 6, 2010

i have used filestream of sql server 2008 for storing images. i want to retrive that image and bind to image control.but not getting the correct path.

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Web Forms :: How To Add Captcha Image Validation

Jun 23, 2012

I want to have the captcha image validation where users need to enter the text shown in image.

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Handler And Generic Handler?

Mar 16, 2010

In Visual Studio 2010, when you say new Item, you can see Asp.NET Handler and Generic Handler. Can you tell me what's the difference, I think it came with .NET 4.0 because I couldn't find related thins on Google.

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Asp.Net Routing To A Generic Handler?

Sep 20, 2010

I Have a generic handler that's serving member logo images:


Now, I want to use it by caling a url like:


So I would create a route for that (pattern: "logo/{username}.jpg"). But, my problem is - how do I retrieve {username} when inside ProcessRequest() of my generic handler? It's not a page, so I can't get Page.RouteData.Values.

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Web Forms :: Need Mathematical Captcha Image Verification

Sep 15, 2012

how you have implemented mathematics type captcha in comments sections in URL...I like to implement this type of captcha security, its more clean and user friendly.

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Looking For A Generic Handler / Service For Mongodb?

May 25, 2010

I am new to MongoDB and have a perfect place in mind to use it. However, it's only worth it if I can make the queries from JavaScript and return JSON.

What's the easiest way I can implement a generic service/handler in asp.net/c# that would allow me to interact with mongodb via JavaScript? I understand JavaScript can't call mongodb directly, so the next best thing is what I'm looking for.

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Ajax - .net Generic Handler Encoding ?

Sep 6, 2010

I'm sending values to Generic Handler via Ajax like that way.

xmlHttpReq.open("GET", "AddMessage.ashx?" + (new Date().getTime()) +"&Message=" + Message,true);

when message contains they are looking like that on Handler in context.Request. these characters are looking as it should. But in context.Request.Url they are looking like and when i want QueryString values it gives me what can i do?

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