Web Forms :: Best Method For Displaying Dynamic Image With Hot Spots?
May 15, 2010
I am unable to figure out the best way of handling the following scenario. So far I have just been messing around with the code trying to get all these pieces to fit together.
I have a multiform view, and within one of those views I want an image to be displayed that is created on the fly based on data from a database, though I have hard coded the values to at the moment, I'll add the database piece later.
I load two images as bitmap objects, add the smaller image onto the larger image, then write the new image to a file as a jpeg. I then load the jpeg into the view controller
[Code]....
First question, I really do not want to create a temporary file. I have tried several different pieces of code to convert the bitmap object into an image I can load into the web controller, but have failed.
Second, I need to set a hotspot in the image that is being displayed in the multiview View2, and I am not able to do so. Is there an easy way of doing this, or should I call the above code as part of an ImageMap, where I can easily set the hotspot? If so, how?
I realize this is kind of a convoluted post, but I am at a cross roads and not sure which direction to go.
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.
Tested my method by assigning the String(containing my image's path) returned by it to a label..its getting the path alright..then why wont it display when I run the code?when I viewed the page's source..this is what I see..
I am creating an Asp.net web site which will support dynamic data. When I am creating a dynamic web site from Scratch (from template in VS) all is working fine. But when I am trying to add dynamic entity (.edmx) file and running the application I am getting following error
"The method 'Skip' is only supported for sorted input in LINQ to Entities. The method 'OrderBy' must be called before the method 'Skip'. "
I am working on a website, using C# with a SQL backend. I'm using the Varbinary data type to store my images because the Image data type is eventually going away. I got the images into the DB and can pull them back out to display on the website. My question is how can I put the images from the DB into an Image control on the website? The images will be different sizes, so I need to keep them confined in one space on the site. I also need to randomly display the images, one at a time, on the website. The user needs to be able to hit the Next button to see the next image when they are ready. The user will only view the images, not make any changes and send data back to the DB.
Since the image will be confined within the image control, how can I allow the user to click on the image and open in a new window? The image needs to be bigger to allow the user to see more detail. Or would it be easier to allow the user to zoom in on the image within the current window?I am using VWD Express, C# 2010 Express & SQL 2005 Express.
I'm no expert with Image controls, or dynamically adding anything, but I seem to have some problem when dynamically adding image controls
When the page loads the images are "there", but they don't actually show an image...just an image "box" I guess you could call it. It's not the "broken" image or "invalid" image display, but a friendlier one that doesn't make sense to me why it's there.
I look at the page's source and literally everything's fine, but I'm not sure what's going wrong. I can show you my code, and hopefully someone will point out the dumb thing I'm doing wrong:
[Code]....
[Code]....
So, it takes all the .JPG files in the folder "Pictures" of my project's folder and creates an Image control to be put into Panel1 with the ImageURL as its filename (with Directory Path) and even set the ID to its filename (so no duplicate IDs). Again, the source is exactly how it should be, but no image is shown.
Initially, I wrote the GetTeamMember() method to display the FullName in the ItemTemplate.
Then as I wrote the EditTemplate, I needed to populate a DropDownList with a list of names (first and last). It was fairly easy using the LinqDataSource, however it currently only shows the LastName. I could write another method GetTeamMembers() to populate the ddlTeamMember with the data I want, but I thought maybe there's a better "LINQ" way.
So I'm looking for a better way to get FullName (i.e. Firstname + " " + LastName) into both lblTeamMember and ddlTeamMember.
Options I thought of are:
I could write a method GetTeamMembers() I write a StoredProc that returns the extra column Better way?
I'm a newbie to Asp.net,learning from the Apress's Begining Asp.net...book.While very curious to see an image given by me on the browser,I'm stuck at the very first step,Configuration : Win7(32-bit),VS2008 Pro/.net 3.5,Firefox as default browser.Now,In created a simple website(not web app) in C#,added three images(.png,.jpg,.gif) to the App_Data folder(using the solutn. explorer of course).Then added the Image control from the toolbox & in the ImageUrl property, selected one of the images->presses f5 to start in debugging mode but every time the browser displays the alternate text given by me.
I am creating a dynamic <asp:Table> based on a user's selection from a DropDownList. The number of columns and rows in the table depends on the user's choice from the DropDown.
The final two columns in each row needs to contain an Edit and Delete button. I am able to create these buttons programmatically. However, I am unable to get the click event to fire.
After researching this, it appears to be the case that my dynamic Web controls need to be created in the page Init method.
However, I am unable to do this as I do not know how many table rows, columns and buttons to create, until after the user has made a selection from a DropdownList.
I would be be very grateful for some tips on the correct way to create and enable the events for my dynamic buttons, in this scenario.
Here is a brief outline of how the program currently works (this is just a brief outline I quickly sketched, small details may be wrong!):
I can do the above by placing the relevant .jpg into the VWD project.
However, I would like to be able to to do this without adding the image file to the project.
e.g. In code, get the image from C:/images/NameOfImage.jpg
The reason I am trying to do this is the website will allow the user to upload as many images as they like. Each one's details will be stored in a database, including details of which location they have uploaded the image to. On retrieval, I will get the location of a specific image from the database, and display it on the page.
I have stored image path in database. While displaying I have to get the image path from database and set it as the ImageUrl of Asp.NET Image control.But it is not displaying the image. below is the code of that.protected void Button1_Click(object sender, EventArgs e)
I have a list basically built with some html and javascript code.. I want one of the columns to display a picture if a certain object in a <List> is null. I have to do this if statement in the business layer. How do I do this?Here is the code for when i just display "Yes" isntead of a picture...
I have a modal popup extender with an asp:image control, and 2 buttons.
I have tried to load the image from a file on the local project folder which I have dynamically created through serverside code, but it will not display the image however I tried.
here are the codes of the modalpopupextender and the hidden popup panel:
When I move some web-based code from VS2008 to VS2010, I find it is different when it is hard to handle the Image class.
Let's take the following code as an example.
[Code]....
As I have already imported the System.Drawing namespace, I still cannot use Image.FromFile method as VS2010 detectss the Image class is in System.Web.UI.WebControls namespace.I have lots of such a kind of code in my project using Image class and I will get messed if need to modify the code from
In the process of migrating an old VS2003 web app to VS2008, I'm running into this issue and haven't been able to find a resolution. Sample code: "Default.aspx" has a PlaceHolder(ToolHeader). In the Page_Load(), we dynamically load a user control passing in the virtual path to a helper method [public Control ParseUserControl(string virtualPath)]. This reads the content from the physical path, returns a Control from ParseControl() method. I immediately get the following error when I open the default.aspx page in browser.
Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Could not load type 'DynamicUC.UcControl'.
Source Error: Line 1: <%@ Control AutoEventWireup="true" CodeBehind="UcControl.ascx.cs" Inherits="DynamicUC.UcControl" %>
Can't figure out why it can't load the type. Namespaces are looking right. I try removing the Inherits="DynamicUC.UcControl" attribute from the "ucControl.ascx", it loads the page fine. Also, this control is a simple one and has no code behind. There are others with actual code behind. They won't work if I remove the Inherits attribute.
I am building an upload page for photos, and would like to preview the image once uploaded. I have looked at a few posts but have not quite reached a working solution.
Section from AddMedia.aspx.vb (btnUpload_Click procedure)
I am regorous to display the full image.First I stored Full image and Thumb Image in binary format in database and i retrived thumb image using Handler in gridview.Now,I want to display the full image to give the permission to User to view the full image.
