How To Add Items To ListView Webcontrol
Mar 2, 2011
I have a ListView control in Asp.Net WebForms which display a set of elements, I have at the end a "More" button like Facebook for example. During the postback I want to get from database another 10 elements (I have already displayed 10 and I don't want to retrieve them again)
Something like this.
foreach (var item in New10Items)
ListView.Items.Add(index,DataItem)
the problem is with DataItem, how to Bind it before add it? what is the best way of solving this?
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May 22, 2010
[Code]......
It always displays ONLY 10 items although there are 30 items in the datatable. If i use GridView ALL the 30 items are displayed just fine.
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Jul 23, 2010
So I have a ListView (assignmentsListView) in an UpdatePanel, being filtered by a DropDownList in the same UpdatePanel. The DropDownList has a list of persons in it and uses autopostback, and the ListView shows the tasks those persons are assigned to.
I am trying to use code similar to this:
[code]....
When I first load the page, the DropDownList shows the first person in the list, and the ListView correctly shows that persons tasks.
If I then select a person who I know has zero tasks, I get an error at the RegisterPostBackControl() method, saying the passed-in control cannot be null.
When debugging, at the RegisterPostBackControl method, it shows that the ListView Items collection has >0 elements in it (the number of elements matches the person selected before the current person).
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Mar 11, 2011
I have a listview showing images like ImageViewer and I want to implement Drag-Drop behavior within ListView. how can i achieve the Srag-Drop inside the below kind of customized ListView.
<asp:ListView ID="lvPhotoViewer" runat="server" GroupItemCount="3" InsertItemPosition="LastItem">
<LayoutTemplate>
<table id="groupPlaceholderContainer" runat="server" border="1">
<tr id="groupPlaceholder" runat="server">
</tr>
</table>
</LayoutTemplate>
<ItemTemplate>
<td id="Td4" align="center" style="background-color: #eeeeee;">
<asp:Image runat="server" ID="imPhoto" Height="100px" Width="100px" ImageUrl='<%# "~"+Eval("PhotoUrl") %>' />
<br />
<asp:Label ID="DefaultPhotIDLabel" runat="server" Text='<%# Eval("PhotoName") %>' />
</td>
</ItemTemplate>
<GroupTemplate>
<tr id="itemPlaceholderContainer" runat="server">
<td id="itemPlaceholder" runat="server">
</td>
</tr>
</GroupTemplate>
<InsertItemTemplate>
<td id="Td3" width="150px" height="150px" runat="server" align="center" style="background-color: #e8e8e8;
color: #333333;">
<asp:FileUpload ID="fileUpload" runat="server" />
</td>
</InsertItemTemplate>
</asp:ListView>
Code Behind:
public class ImageEntity
{
public string PhotoName { get; set; }
public int PhotoIndex { get; set; }
public string PhotoURL { get; set; }
}
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
IList<ImageEntity> imagesList = new List<ImageEntity>()
{
new ImageEntity(){ PhotoName="House1", PhotoIndex=1, PhotoURL= @"ImagesHouse-01.JPG" },
new ImageEntity(){ PhotoName="House2", PhotoIndex=2, PhotoURL= @"ImagesHouse-05.JPG" },
new ImageEntity(){ PhotoName="House3", PhotoIndex=3, PhotoURL= @"Imageshouse.jpg" },
new ImageEntity(){ PhotoName="House4", PhotoIndex=4, PhotoURL= @"Imageshouse2.jpg" }
};
lvPhotoViewer.DataSource = imagesList;
lvPhotoViewer.DataBind();
}
}
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Apr 30, 2010
I am trying to use checkboxes to select the items in a Listview. I have added a checkbox control in the , and they are displayed properly.
The problem is that Checked property never changes when I click on them. Why does this happen?
Here is the code:
<asp:ListView ID="ListView1" runat="server"
onitemcommand="ListView1_ItemCommand"
onitemdatabound="ListView1_ItemDataBound">
<LayoutTemplate>
<asp:PlaceHolder ID="itemPlaceholder" runat="server" />.......
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Nov 15, 2010
I'm currently using a ListView in my webformsapplication. This ListView generates a table with (currently) three columns. "Username", "Organization" and "Locked". These are represented with string, string and checkbox respectively. The checkbox should postback on change...
Should I use <%# Eval("Username") %> or <asp:Literal blablah> to inject the data? This is more relevant for the checkbox... It seems very "dirty" to write <input type="checkbox" id="something" <%# if ((bool)Eval("Locked") == true) /* some unknown code for outputting "checked" */ ;%> />
Or should I use another container alltogether?
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Aug 5, 2010
I am using a listview to display some items.But sometimes based on condition I have to hide few items from the list.So how can I do this?I am using ASP.Net with c#.
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Sep 22, 2010
I'm having a hard time coming up with a good way to number the items in my paginated ListView. The solution I was using prior to adding pagination worked fine, but now the numbering doesn't persist between pages. If the first page is 1-10, the next page will also be 1-10 and so on. Obviously, it should be 1-10, 11-21, etc.
Is there an easier way to add numbering to ListView items that I'm missing? What's the best way to do this?
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Jan 6, 2011
I have a listview that is bound to a datatable on the runtime. The listview has a <ItemTemplate> format which includes a lot of controls. On the page Load I do bind the listview to a datatable. Now, I want to add more ListView Items without databinding the whole listview and maintain the same ItemTamplate.
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Feb 10, 2011
I have a listview with some data bound to it.
In this data are column for an address.
How would I go about accessing these data items in code behind so I can concatenate them into one easy variable and miss out columns that have no data in, i have fields:
address
address1
town
county
postcode
I don't have a problem with the concatenation just accessing the data items.
I am getting data out via a dataset and binding it to a listview.
Is it possible to access data items in the code behind to format or do whatever i want with them then showing it in the list view such as, concatenating the address fields into one variable?
so instead of writing:
DataBinder.Eval(Container.DataItem, "address") & ", " & DataBinder.Eval(Container.DataItem, "address1") & ", " & DataBinder.Eval(Container.DataItem, "town") etc...
in the actual list view i could do this in the code behind in a string variable then show the variable in the list view?
'select command
Dim cmdSchedule As SqlCommand = New SqlCommand()
cmdSchedule.Connection = keypadSQL
cmdSchedule.CommandText = "spSchedule".....
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Dec 24, 2013
Run mode as follows
In Listbox as follows
Candidatename
AshiwnBaskarChandruDasGopal
Listview (control)
I want to display the above Listbox items into Listview. for that how can i do in asp.net using c#.
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Nov 11, 2012
What is the best way to create a hyperlink to a ListView's items? I'm trying to enable users to simply click on any of the ListView's items, which in turn has to effect that a detailed page for the specific item is opened in a new tab. Right, I got it working by using a Hyperlink component, which is a step closer to my goal.How to make the entire ListViewItem clickable.
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Jul 5, 2010
How can i get the number of a listview records (or the index of the last record) from within the ItemDataBound event ? I would like to hide one of the controls in the last record, how can i know if the item is the last one ?
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Apr 18, 2010
I am looking for a way to set a listviewitem backcolor programaticaly based on a value of a datafield.
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Sep 16, 2011
I'm trying to update items in my SQL database from a ListView. It works, but all entries in the database update. Not just the one I'm working on. I backed up the database prior to testing, so there's not any issues there.This is how my SqlDataSource UPDATE command is setup:
SQL Code:
UPDATE entries SET duration = @duration, checkinDate = @checkinDate, receivedBy = @receivedBy, cosmeticDmgIn = @cosmeticDmgIn, STATUS = N'closed'
I don't have any code setup to update the database, which is probably the issue.When I load the ListView, select edit, type in my edits, and click "Update", all the rows in my database, for that column, are updated with that data.I tried inserting the parameters manually, within the ItemUpdating event, but it never works.
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Oct 28, 2010
Is there a way where I could copy all the asp:ListView ItemTemplate Items into a DataTable?
My ListView Items contain TextBoxes and Labels.
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Feb 1, 2010
I am using 2 listview. One is attached to the datasource and other is not. So in order to show the headers, I filled in the emptydatatemplate.I have a command on the 1st listview "Add", on clicking of which I should remove the item from that listview and add it to the 2nd listview.the datasource of the 1st listview is a stronglytyped list.Kindly help me, how to achive the moving of items from one listview to another and what should be the setting of the 2nd listview to show the headers.
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Feb 2, 2010
There is a page in my project named Messages.aspx that shows the messages received [but obviously], using the ListView control.
I want that the user should be able to see the body of the message on the same page [Messages.aspx] just by clicking the subject of the message, which is ofcourse a link.[Messages.aspx?msg_id=some_id]. Hence the user would actually reload the same page to read the contents of the message.
Now what I want is that I should be able to write some code that would change the <LayoutTemplate> and the <ItemTemplate> of the listview during the runtime. [in the page_load event of course]
Previously the listview would look like this:
[Code]....
After the clicks any message to read it and the page gets loaded, I want the layout of the listview to look like this.
[Code]....
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Jul 18, 2010
i have the following problem. i'd like to use a listview with paging for mulitple selection of items in a list. The selection is no problem. I do have f.i. a list which holds the key values.
List<Int64> selectedList =
new
List<Int64>();
As soons as the user makes a selection or removes a selection the list will be updated accordingly. Also hold this list info when changing pages of the listview.
[Code]....
This list can be stored either in a session or a viewstate.
My question is how can i retrieve the information of the list back into my listview and thus displaying the selection the user has made when he jumps from page to page.
Below my listview.
[Code]....
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May 24, 2010
In my project I have a listview which I am binding from code behind. Now I would like to add a droppdownlist for each item in listview. So my question would be:
Is there a way to populate my dropdownlist whit data which I have in a List?
Here is a bit of code to show how my listview looks like:
[Code]....
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Dec 11, 2010
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Mar 14, 2011
have an annoying problem. i'm trying to update single items in a databound listview. but when i click the update button it gives me the cannot insert NULL value. it doesnt seem to read anything from the textboxes which i have databound from the database. even though text is clearly shown...
i have setup my update statement and parameters, it uses the Update command name and ItemUpdating event. i catch the data from the textboxes by using e.ItemIndex and use the text assigned to the parameters in a SqlCommand.
The thing i'm aiming for too is that when an item is updated it stays on the page where the item was updated, (i was using response.redirect before but it went against my aim since the whole page reloaded)
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