C# - Writing An Image Dynamically?
Jun 23, 2010
I have three values that are being generated dynamically in the code-behind of my web form. These three values will be shown to the user. While this may sound odd, I do NOT want the user to be able to copy and paste these values. Because of this, I would like to write out the values via an image that is build dynamically.
My question is, is there a way to dynamically create an image and write it out to the response? I would prefer not to create an image, save it to the server, and then pass a url back to the page. I would really like to write out the binary content along with the response.
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Mar 5, 2011
I would like to write the following within a div (myGallerySet) from behind code (vb.net) on pageLoad:
<div id="gallery1" class="galleryElement"> <h2>Brugges 2006</h2> <div class="imageElement"> <h3>Item 1 Title</h3> <p>Item 1 Description</p> <a href="#" title="open image" class="open"></a> <img src="images/brugges2006/1.jpg" class="full" /> <img src="images/brugges2006/1-mini.jpg" class="thumbnail" /> </div> <div class="imageElement"> <h3>Item 2 Title</h3> <p>Item 2 Description</p>
<a href="#" title="open image" class="open"></a> <img src="images/brugges2006/2.jpg" class="full" /> <img src="images/brugges2006/2-mini.jpg" class="thumbnail" /> </div> </div> <div id="gallery2" class="galleryElement"> <h2>Stock Photos</h2> <div class="imageElement">
<h3>Item 1 Title</h3> <p>Item 1 Description</p> <a href="#" title="open image" class="open"></a> <img src="images/stock/77196_6784.jpg" class="full" alt="Item 1 Title"> <img src="images/stock/77196_6784_002.jpg" class="thumbnail" alt="thumbnail of Item 1 Title">
</div> <div class="imageElement"> <h3>Item 2 Title</h3> <p>Item 2 Description</p> <a href="#" title="open image" class="open"></a> <img src="images/stock/165392_5486.jpg" class="full" alt="Item 2 Title"> <img src="images/stock/165392_5486_002.jpg" class="thumbnail"
alt="thumbnail of Item 2 Title"> </div> </div>
Basically I have images details which are stored in a database and would need to dynamically added hence, why i need to write within a div container. Any ideas how I could achieve this?
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Nov 22, 2010
I want to write a discount amount which is coming from a Database onto an image. I have taken an image like:
<div style="height: 158px; width: 210px; float: left; position: relative;">
<a id="aproduct" runat="server">
<asp:image id="pimage" runat="server" width="210" height="158" border="0" />
</a>
[Code]....
I want to show discountTag image as background to <td> and show discount amount in a label.
I try for this, but when I do this the big image on which I am showing my discountTag label are not getting aligned properly. I want the o/p like Big image on which discountTag image on which discount amount.
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Nov 12, 2010
I want to code a image link like this...
String p = ""
P = P + "<asp:Image ID='Imageprofile runat='server ImageUrl='~/images/"+ x[5].ToString() +"'/><br/><br/>";
Literal2.Text = P;
But this doenst work,
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Mar 31, 2010
We have encountered this difference in file creation while using a HttpHandler Versus a Code Behind Aspx page. We are reading a saved jpg/png picture as byte array from a 'Image' field in sql server database and create a physical file in the server. Both the Aspx Page and Httphandler use the same code pasted below.
//Begin
int docID = Convert.ToInt32(Request.QueryString["DocID"]);
var docRow = documentDB.GetDocument(docID);
// Retrieve the physical directory path for the Uploads subdirectory
string destDir = Server.MapPath("../../Uploads").ToString() + "\";
string strFileName = destDir + DateTime.Now.ToFileTime() + "_" + docRow.DocName.ToString();
FileStream fs = new FileStream(strFileName, FileMode.CreateNew, FileAccess.Write);
fs.Write(docRow.DocData, 0, docRow.DocData.Length);
fs.Flush();
fs.Close();
// End
After the file is created, it is viewable as a jpg/png Image only in Aspx Code Behind. While in case of HttpHandler it is not a valid Image.
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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]....
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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]....
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Sep 30, 2010
Here is this thing which to me looks possible, but when I searched over the net I couldnt find anything.
I want to create a page where I can upload an image using any upload function and then display it. Now after diplaying it I want to select the hotspots for an image map. The coordinates of image map values are stored in a database.
Basically I want that to create image maps and hotspots I dont use any offline software, this work is successfully completed and working perfectly, but i want generate one identification where i click the hot spots position in image or CSS file Generate for user identifications, So how can i solve this problem.
I hope You are clear in that what I am looking for.
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Jul 31, 2013
How can I make image control through C# coding in gridview column?? and then display image in it.
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Feb 11, 2010
I tried it but it doesnt show me in IE.
I am basically downloading a file from a webpage and saving it to a location and then i gave the path of that file as input to the
Image.imageurl property but i dont get the required reuslt ??
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Feb 13, 2010
how to create the image dynamically based on the points i get from table
if point =1
my image must be displayed once,
if point=2
imgae has to be display twice.... in that way
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Nov 10, 2010
I try to establish a dynamic HTML table with data for an item. i am getting trouble showing the image for the item, i am getting my data from the database, i have saved my image as image in the database, and i used byte[].
I have the following code for desplaying data:
protected void DDLitem_SelectedIndexChanged(object sender, EventArgs e)
{
var item = new ItemControl(); // this is in the BLL layer.
List<Goods> get = item.returnGoods(DDLGoods.SelectedItem.Text); // DDLGoods is a DropDownList. and the method returns a List<Goods>
var out = new StringBuilder();
out.Append("<table><tr><td>Name:</td><td>Designation:</td><td>Price:</td><td>Item Number:</td>");
foreach (var v in get)
{
out.Append("<tr><td>" + v.name + "</td><td>" + v.designation + "</td><td>" + v.price + "</td><td>" + v.itimId + "</td><td></tr>");
}
out.Append("</table>");
Label1.Text= out.ToString();
}
I need to wrigth in the foreach loop somethink that will desplay my v.image.
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Mar 24, 2011
I have a Folder which consists of number of images. Initially have to load the first image from that folder in a page. when user click the first image it should display the second image where it will have next link for the third image. when the user click the next link now then it should display third image where it will have next link for fourth image and previous link for third image where it should repeat upto the end of the image.
Can any one tell me how can i display images one by one by passing query string value to the images and how to change the link dynamically for the images
Update:
Intially i want to load the first file without passing query string, with the first file there should have next file link. Once the next link button is clicked then only have to pass the query string.
how to pass the query string from second file to end of the file,
DirectoryInfo oImageFolderInfo = new DirectoryInfo(this.ImagePath);
FileInfo[] oFileList = oImageFolderInfo.GetFiles("*.*");
string fileName=string.Empty;
if (Request.QueryString["filename"] != null)
[Code]....
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Mar 26, 2010
I have an image field in my .rdlc report. I am keeping the images in 'Images' folder. I want to set the image url dynamically just as
url of image field in report="~/Images/img.jpg";
How can i set url of the image field dynamically in coding.
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May 11, 2010
i have imagebutton which is generated dynamically. say i have 20images, if user clicks i need to get the name of the image.
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Jan 31, 2011
I'm trying to add image into table dynamiccally but it doesnt happens... also when i add image into cell there is a error message : Cannot get inner content of because the contents are not literal.
[Code]....
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Sep 22, 2010
I am facing problem with the dynalically generating the image at particular with coordinate points on image map through code behind (aspx.cs). As per my requirement i need to generate Hotspots dynamically and also displaying an image to indicate the Hot spots.
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Jan 18, 2010
I am using a gridview where on clicking the ID based on the ID values are fetched. Based on ID Image is fetched from database. Now the issue is while saving the path to the database an exception is thrown as "cannot evaluate expression because a thread is stopped at a point where garbage collection is impossible"The path is saved but while retrieving even the path is fetched but is not displayed.
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Oct 18, 2010
In my website I have <img src from code behind (created the whole table and css in the code behind). So for an image I added as <img src='../combox/img/products/prod1.gif">
So when I run this page and see the view source, I get the following path for my image: <img src = "http://localweb1/combox/img/products/prod1.gif">. Here localweb1 is my development server.
But I want to change this "http://localweb1" to "http://www.mypage.com/ so the img src will show as <img src="http://aeroprod.com/combox/img/products/prod1.gif">
How should I do this in my code? Do I have to parse? In this case how do I do it?
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Oct 11, 2010
I have created an aspx page that is displaying user profiles, and on that page I have an asp.net image control that I dynamically populate at runtime based on the users profile image.
I have created several themes, just modifying css to display the profiles with different background and different layouts.
For fun I have created one theme that is kind of like the matrix, and I would like to be able to take the users profile image and change it to a 'green scale' so to speak, or even just a straight up green color, more so this one #20f380. The profile images are just jpg, and are already cartoonish so they should change to green without the image looking to bad.
Is there a way to use code behind to change an image's colors?
C# or VB is fine, currently I've not been able to find any tutorials that work for me, or are close to what I am trying to do.
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Apr 25, 2010
iam using asp.net with c#, iam having images in page .when i click on image the image size should be increase in the same window.then when i click again it should go to another page for edit.
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Nov 29, 2010
[code]....
This code DOES Create the Text "TOTO" but does not create image "Targetvignette"the code works ok with BUTTON object as opposed to Image.I have manually created a image with the toolbox using exactly the same credential, this displays OK.it does not catch any exception it just doesnt display anything on the webpage.I can create all sorts of control but not image [Image button] is not that better as it seams to be create but I got no image just "SUBMIT QUERY" textI am confused and stock I have tried i think every single property of the image object i could find.
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Jan 3, 2010
On my Form Load event I am creating a bitmap using System.Drawing classes, and I want to display this image on my WebForm. How can I do that?
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Oct 8, 2010
I'm trying to dynamically load an image from my code behind file, however I want to be able to resize the image thus reducing the file size sent to the client. I've come across a few samples but without much luck. So far I have the following:
[Code]....
Unfortunately I now need to load this image into control panel...but nowhere can I find how to do this.
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Nov 12, 2010
how to change the themes using image button in dynamically
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