Custom Server Controls :: Writing Image Binary Data To The Response
Sep 21, 2010
I've created 2 web user controls. A = User control that displays an image, and B is the user control that hosts A. I'm trying to stream an array of bytes to A, but it seems like the Response.BinaryWrite method completely overwrites any heirachial controls (I can't see any of B's other controls besides the image).
How do I get A to just display the image from the byte stream? It doesn't come from a database, it's an image I created on the fly.
A's code:
[Code]....
View 6 Replies
Similar Messages:
Sep 24, 2010
I have an ASP.NET app that writes binary data to a SQL database. It worked fine using SQL Express, but does not ever write the data using SQL Server 2008 R2. SQL Profiler shows the binary data in the UPDATE query, but nothing happens... no errors, no data saved. Does anyone know what I'm missing? Other data types work fine.
My data type is VarBinary(MAX)...
View 7 Replies
Jan 18, 2011
I know that you can enable NTLM authentication in an ASP.Net app using:
<authentication mode="Windows" />
However - I need to handle Forms, HTTP and other custom authentications in the same app, so ASP.Net's limited built-in support is no use.
The NTLM handshake should be fairly simple:
Request - [unauthenticated - no user info passed]
Response - 401 Unauthorized
WWW-Authenticate: NTLM
Request - Authorization: NTLM <base64-encoded type-1-message>
[code]...
I need to parse type-1 and type-3 messages and generate a type-2 message.
The structure for those messages is well documented but fairly complex - it seems very messy to write my own message generators and parsers. I think the methods to read and write these messages should already be in .Net, but I haven't been able to find them.
View 1 Replies
Nov 15, 2010
I'm a little stuck here, with my first server control. I'll just post the whole thing, as I'm sure I've done plenty of mistakes. The main thing for me to find out is if there's a more elegang way to write this.
What I'm trying to accomplish here is to write a panel with custom HTML inside it. Inside the custom HTML, I need to put some server controls I can actually reach. My attempt at finding the span in the code failed, so there's obviously something wrong.
[Code]....
Obviously, I've only just begun, but I'd really value some feedback before I dig myself in too deep ;)
View 6 Replies
Jan 30, 2011
The thinking behind the question is that my image current reads it's data from a custom httphandler that gets the image from the database. I want to be able to use a file upload control to "post" a replacement file back to a "write" handler, updating the database. Then I can refresh my image using javascript to the original "read" handler. Is this possible?
I currently have a standard postback model upload process which puts the image into the database and a custom handler to read it back. What I want to know, is can you create a custom http handler to perform the upload so I could asynchronously call the upload handler then refresh the image src to pull it back from the database. At the moment I am using the IFrame approach to make it appear asynchronous, I just want to know the best practice really
View 2 Replies
Jun 14, 2010
i need a image control, who is able to convert the binary image data into image automatically, i find one which is paid control by telerik, but i need a freeware of it.
View 3 Replies
Sep 14, 2010
How would I go about inserting an image that's in my images folder into a sql table column of datatype varbinary(MAX) ?
View 5 Replies
Nov 29, 2012
I am developing an application in which i have to store image in database SQL server2008. I want to use upload file control and only want to upload .jpg and JPEG file and view this image in image control . And when i want to update this record i can update that image too..
View 1 Replies
Aug 12, 2010
I want to use an image inside a Custom Web server control! Do I need to use Web.resources ? if so , how to do ?
View 9 Replies
Sep 29, 2010
i registered an image in AssemblyInfo.cs like this:
[Code]....
now i want to initialize that image in css file for background-image but it dose'nt work.
my css file is:
[Code]....
i also try with this :
[Code]....
View 3 Replies
Apr 28, 2010
I am trying to get a control (not a controller -- a subclass of System.Web.UI.WebControls.WebControl), that can be used that I wrote for ASP.NET to work in an ASP.NET MVC environment. Normally, the control does the normal thing, and that works fine
Sometimes it needs to respond by clearing the response, writing an image to the response stream and changing the content type. When you do this, you get an exception "OutputStream is not available when a custom TextWriter is used".
If I were a page or controller, I see how I can create custom responses with binary data, but I can't see how to do this from inside a control's render functions. To simplify it -- imagine I want to make a web control that renders to:
<img src="pageThatControlIsOn?controlImage">
And I know how to look at incoming requests and recognize query strings that should be routed to the control. Now the control is supposed to respond with a generated image (content-type: image/png -- and the encoded image). In ASP.NET, we:
Response.Clear();
Response.OutputStream.Write(thePngData); // this throws in MVC
// set the content type, etc
Response.End();
How am I supposed to do that in an ASP.NET MVC control?
View 2 Replies
Aug 22, 2010
How to Update Binary Image on Formview
[Code]....
View 1 Replies
Aug 19, 2010
If any user gives the information of his photo in binary objects how can i search it and how can i display the corresponding image that was stored in the sql database
View 4 Replies
May 31, 2010
i want to show binary image in griedview. which is store in database.i was trying but not get this.
View 3 Replies
Apr 25, 2010
I have a simple HttpHandler that generates a dynamic image based on query string parameters and a custom web control that renders an image tag pointing to the handler as its 'src' attribute. All works fine when run in the web server, but at design timethe control displays as the "missing image" icon (red x in a box). The handler is registered in the web.config with a ".ashx" extension. The RenderContents method in the control looks like this:
output.AddAttribute("src", ResolveUrl(string.Format("~/Sparklines.SparkHandler.ashx?stype=pm&w={0}&h={1}&sv={2}&ev={3}&cv={4}&sc={5}&ec={6}&mc={7}&gs={8}",
Width.IsEmpty ? 100 : Width.Value,
Height.IsEmpty ? 15 : Height.Value,
caleStart, ScaleEnd, CurrentValue,
ColorUtils.ColorString(StartColor, true),
[code]...
View 5 Replies
Feb 23, 2010
i am currently facing some problem retrieving image for display on a gridview control. the Image data type in the data table is "image". the data that is stored inside the database is in this format "<Binary data>". may i ask if it is possible tojust retrieve a image data of this format and display in the gridview? or do i need to store the image in a image folder for retrieval?
View 3 Replies
May 12, 2012
I want to display image in detailview.. I used image datatype in the database instead of using varbinary. but the problem is.. detail view is not fetching the picture..
how i display the picture of datatype image.
View 1 Replies
Aug 17, 2010
I want to make a textbox with a specific style, within this style a set of images as background parts, how can i attach these images to the custom control as whenever i take the .dll file and add it to the toolbar the images do not appear. So i tried to make them as resource files and their property as embedded in .resx file, so how to make the css style background image url to be linked to any of those image.
View 1 Replies
Jul 19, 2010
i have dataset containing multiple images in binary format,how i can use handler to display those images from dataset which i am having,without needing to pass id in query string to handler each time?
View 4 Replies
May 30, 2010
I'm having a hard time solving what should (I think) be an easy problem. I have a formview defaulting to Editmode. One of my data fields is a binary image. How can I change the editItem template to allow a user to upload a new image into the binary image field?
View 2 Replies
May 7, 2015
along with a gridview update file that I store in my database
View 1 Replies
Nov 21, 2013
I am inserting images into the database and I want to access binary data (image) from the database and insert into the new table. How to do this...
View 1 Replies
Oct 25, 2010
I have a coloumn in a database table in which i am storing the candidates photo in a binary format.
now i have to show these photo in a gridview according to the candidates rollno. i am trying to use the imagefield of a gridview control to display the photo but it is not displaying the photo in a grid view
View 3 Replies
Mar 16, 2011
i need to save multiple documents stored in SQL server as Image type to disk.
What i want to do is "backup" all files in a table (column) to disk, zip them and Response.TransmitFile(FilePath) to client.
I could use C# ot VB but that would require a lot of connections to database or a lot of server memory and i don't want that, becauze there are a lot of files to be saved Since SQL can write files to disk i was thinking about saving those files to disk directly from sql. Something like when u're doing a backup
[Code]....
View 6 Replies
Jul 5, 2012
I use these code to dispalying image from database. [URL]... I use these code for my data list
<asp:DataList ID="DataList1" runat="server" RepeatColumns="4"
RepeatDirection="Horizontal">
<ItemTemplate>
<table class="DDLh">
[code]....
For displaying image we should write this code
<asp:image ToolTip = "ASP Image Control" ID="Image13" runat="server" ImageUrl ="~/imageH.aspx?ImageID=48" Height="156px" Width="174px"></asp:image>
now here in my data list what should i write instead of this code?untill it show my image from database?
<asp:image ID="img1" runat="server" CssClass="TPH" ImageUrl='<%#Eval("image","image/house/{0}")%>' BorderStyle="Solid" BorderWidth="1px" BorderColor="#c9c9c7" />
View 1 Replies
