I want to display images by using repeater control. those images have to change with respect each 5seconds. how to change those images? those images should be in database? i kept images in my project folder. then now how to go further.
View 1 RepliesI am with c# asp.net. How do we upload images to a repeater using file upload?
View 1 RepliesI use a label for sending my html data to the view(ASP.net.). Below you see a short version of my code-behind page:
[Code]....
This practice is in my eyes not the best one. The html-code is much bigger in the real situation and I don't like that in my code-behind page. I would only send the image source to the view and bind them in some ASP.net tool. I think the ASP.net repeater is the best. But I have no idea, how to do this?
I'm creating a simple CMS for a fairly simple web page. I'm currently working on a part for displaying news on the main page.
The controls I have on the page:
- a GridView control with enabled pagging and a SELECT button,
- an Image control for displaying news cover picture,
- CKeditor control for editing news text,
- Repeater control for displaying pictures from database
How does it all work?
In Page_load I have the following:
vb.net Code:
connectionString = "Data Source=KORISNIK-PCSQLEXPRESS;Initial Catalog=****;
User ID=**;Password=****" conn = New SqlConnection(connectionString)
If conn.State = ConnectionState.Closed Or conn.State = ConnectionState.Broken Then
Try conn.Open() If Not IsPostBack Then bindGrid()
[Code] ...
As you can see, I load the GridView control with news from DB. At this moment all other control are disabled. User has to SELECT the row he wants to edit, and click the MODIFY button.
This is what happens when user clicks the MODIFY button:
vb.net Code:
Private Function selectForEdit() dsSelectForEdit = New DataSet
captionPicture.ImageUrl = "" enableCommands()
Dim sqlQuery As String
sqlQuery = "SELECT news.newsCaption, news.newsIntro, news.newsCoverPicture, news.newsStatus,
[Code] ....
Basically, I select newsDetails based on newsID. Also, this is where I take the coverPicture from the database using a generic handler.
This is the code for showImage.ashx:
vb.net Code:
Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
Dim newsID As Int32 If Not context.Request.QueryString("newsID") Is Nothing Then
newsID = Convert.ToInt32(context.Request.QueryString("newsID")) Else
Throw New ArgumentException("No parameter specified") End If
[Code] ....
This part works fine, as the picture is correctly displayed in the Image control. Now, I also want to load the pictures that are related to the selected news. So, I use this function:
vb.net Code:
Private Function selectNewsPictures() dsSelectPicturesForEdit = New DataSet enableCommands()
Dim sqlQuery As String sqlQuery = "SELECT newsDetailsPictureID,newsDetailsPicture,newsDetailsPictureCaption,newsDetailsPictureDescription FROM newsDetailsPictures WHERE newsID = @newsIDEditing" myCommand = New SqlCommand(sqlQuery, conn) myCommand.Parameters.Add("@newsIDEditing", SqlDbType.Int, 250)
[Code] ....
You can see that I take pictureID's and store them into a List (of integer). That way I can use those integers in showNewsPictures.ashx to display all the pictures.
showNewsPictures.ashx:
vb.net Code:
Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
Dim newsID As Int32 If Not context.Request.QueryString("pictureID") Is Nothing Then
newsID = Convert.ToInt32(context.Request.QueryString("pictureID")) Else
Throw New ArgumentException("No parameter specified") End If
[Code] ....
The picture ID's are being sent through pictureRepeater_ItemDataBound:
vb.net Code:
Private Sub pictureRepeater_ItemDataBound(sender As Object, e As RepeaterItemEventArgs)
Handles pictureRepeater.ItemDataBound
If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then
Dim ctrl As New Image ctrl = e.Item.FindControl("pictureHolder")
ctrl.Width = 100 ctrl.Height = 100 ctrl.ImageUrl = "~/showNewsPictures.ashx?pictureID=" &
listOfIDs.Item(itemIndex) itemIndex = itemIndex + 1 End If End Sub
THE PROBLEM:
I load the page, select the news, click the MODIFY button and all works well. The news details are loaded, the cover picture is loaded, the repeater pictures are loaded.
I click the cancel button (clears all the commands and disables them) and I get an error saying the DataReader needs to be closed.And I never use one This happens either in showNewsPictures.ashx or showImage.ashx.
In some other scenario, this happens right after I click the MODIFY button.
I am working wirh repeater and i want to display 4 images using image control. user save only 4 images in database. but whenever user wants to see all four then how to bind all four images from one column at a time.
View 3 RepliesI want to implement an image gallery in asp.net/C#. I am using sql server 2008, visual studio 2010 and .NET 4.0.
I have made a webpage and now want to display 6 images as thumbnails (and their names just below the thumbnails) at the center of the page. The format of the display is something like this:
[Code]....
Basic operation is like this:
I pull images from a database and then display them as above as thumbnails. The 1 2 3 Next> are links depending on whether there are more than 6 images pulled from the DB. So basically the numbering 1 2 3 4 Next> is dynamic depending on how many images exist. Can anyone give me a basic overview of how this an be achieved? Should I be using a asp:Repeater or a asp:DataList for this kind of a display?
I have tried binding images to repeater from one folder called images . But now, I am trying to bind the repeater with different folder's images, based on which menu item is clicked like "Wedding", "Birthday". When "Wedding" is clicked then it repeater should be loaded from Wedding folder's images similarly with "Birthday".
Currently i am using following code to load from single folder.
if
{
Repeater1.DataSource = di.GetFiles();
Repeater1.DataBind();
(!IsPostBack)string imgDir = Server.MapPath("~/images");DirectoryInfo di = new DirectoryInfo(imgDir);
[Code]....
I am using a repeater control and i want to use one more repeater control inside the existing repeater control .
Like this:
<asp:Repeater ID="Repeater1" runat="server"> <HeaderTemplate> </HeaderTemplate>
<ItemTemplate>
<!-- start child repeater --> Here I want to use one repater control <!-- end child repeater -->
</ItemTemplate>
</asp:Repeater>
I have nested a repeater control in Gridview. Right now it is showing gridview rows and repeater header for every case(whether data is there or not for that particular grid view row in the repeater control). I want to hide the gridview row and repeater control header when there is no data present for that particular gridview row. That case I handled at code level by filtering the resulted data table.
Now the another problem I am facing: I have allowed the paging on the gridview i.e. pagesize 3. When page loads it works fine, but when I go to page 2 then it generates following error: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
Below is the code to fill the grid, paging and fill repeater on rowdatabound event of grid.
[code].....
I've been trying to get image caching working for the last 8 hours and I keep the same problem time and time again, I'm trying to cache Images at the moment and then when thats succesful, apply this to cache my js and css files. I have at the moment Sql Dependancy caching working on my dynamic pages but the page still takes to long due to images not caching.
What I have tried is going to IIS7 Management and adding HTTP Response Header for the images folder and setting various things for the cache control.i dont care how long it caches it on the client or on the proxy servers i just would like it to check when the file was modified and compare it with the one in the client or proxy cache and if they are different then fetch the new image which has been ftp up. i could solve this by changing the image name but the thing is the image name is generated when they are ftp'd to the site by an application and the name is a direct reference to the product so i cant change the name each time, as it would mean making a lot of otherpages accross the board.
so What i would like, is to set and expiry date of lets say 32 days or more on the images and then check to see if they have changed by date modified or some other way of checking(Etags maybe) I'm not sure, if they have changed on the server then redownload and recache them, I tried using post-check and pre-check together but that just permantly cached them, so when i change the image the only way it would display the new image is to just hit F5.
In Brief, how can i Cache images, on the client machine/ proxy cache and recache them when the modified date of the file has changed.
I want to show on one of my pages a slideshow type page. Basically I want it to show a selection of images from a folder and have the images scroll from right to left.
View 8 RepliesI want to write one program by visual studio 2008 (C# and ASP) that has web application and windows application.
I want to get clients images in web app(upload) and store them in DB (mysql) then send these images to windows app via web service (so i new web service, not web site). But i have 2 problems:
I have 2 ways to store images in mysql, first i should have BLOB field in DB -that it takes more space-, second i should save just name of each image in DB(so have image in one folder) -in this way i don't know how get image from clients and store them in that folder-. which one? Or what other? How (code) can i transfer image via web service(Byte[] or? ).
how to upload images to server(application/images folder) and retrive(display) from and on client PC for asp.net. its just for uplaoding logo directly to server folder and retriving from server to client. i am not getting server path on client pc for image.
View 5 Repliesi have the following scenario, i have a column of a gridview that shows me a text telling me is the user is allowed or not to access to some page, but now i just showing allow and deny, but i wanna show images that represent me the action, how can i do that?
View 3 Replies[Code]....
i am using asp.net with c#, i have table images
shop nvarchar(50),
imgc image
imgo image
iam saving images in a database but while retreving it is showing blank images. i want to display as thumb nail images
I wanted to combine app_themes css files into one on the fly. I did so using Mads Cristensen technique. But now all elements that has background image defined through css (see picture) don't display image. I believe that is because css files are not relatively referenced anymore (../), but through axd file. I'm trying to fix this by changing reference to image files without success. I already tried background: url("~/App_Themes/44/images/myimage.gif") and this works for pages that combined css. But the problem is that there are other pages in this project that don't use this css combining and now they lost reference to background images.
View 1 Repliesgot an example of a repeater inside a repeater (dataBound) code behind?
View 3 RepliesI have a user control that displays a shopping cart in an ecommerce application.
The main cart display is a repeater that renders as a html table. In one of those table columns, there is another repeater to display people associated with the products int he cart (it's a repeater in case there is a line item >1 with multiple people).
I've added an ImageButton that I want to use to change the person associated with the item. At first, when I'd click on it I was getting this error:
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
So as an experiment I disabled EventValidation on the page (not the control it's self) and now I do not get an error, but I also do not ever hit the breakpoint I set in the innermost repeater's ItemCommand event.
So I wonder how I might do this without disabling EventValidation, because this control will show up on multiple pages and we don't want to edit them all. Also, I'll need to know not only the repeater containing the control's row that the event came from but also the row index of the repeater containg this one. Is this possible?
I have repeater in which I have 2 hyperlink in the footer of the repeater and I want that the hyperlink can navigate from the page_load
View 2 RepliesI want to bind parent repeater item index in child repeater control using inline code not code behind side.
For example
[Code]....
I am using a repeater to build a custom table. However, I can't figure out how to make the table show subtotal if the next rows tour does not match the previous rows.
Something similar to that.
row1 tour1
row2 tour 1
tour1 subtotal
row3 tour2
row4 tour2
subtotal
total
[code].....
but this shows all the data in the nested repeater not the ones that match the parentrepeater fields for example tour,theme,dep7 should match in the child repeater
I'm so confused I wasn't even sure what to make the title so that it would make sense.
Here is what I have:
[code]...
I have links at the top of the page that are the letters A-Z. What I want to do is click on one of the letters, then show only the div IDs that start with that letter. I can't figure out how to do this since I'm dynamically creating the ID names. I had it set up nicely with Javascript and CSS, but the function call was inside the repeater. The layout is changed now, and I don't understand how to make the div ID available outside the repeater.
I am using Nested Repeater repeater1 and repeater2 in my project . one button is there inside repeater2 but i cant use that button using e.commandname
so how to use that button and how to write code on it.
How to Display the treeview control with multiple images(each link should be with one image) instead of + images in asp.net
View 2 Replieswhat changed do I need to make to my code for it to achieve what I'm after.
At the moment I am getting a "cannot cast to type" error message with the below code.
I have also tried calling the ItemDataBound method in with the parent repeater tags and had no errors but when I clicked on the button it would just move back to the top of the page and would not hide or show any data. Also I have made the div style to none but the first record still shows its child but the rest don't.
[code].....