Binding C# Objects To ListView / Control?
Jul 1, 2010
I have a class that returns a list of "Category" Objects. I'd like to display them along the left-hand side of the page in a listview (if that's the best way to do it, even).
The category objects have normal attributes. Title, User, NumberOfProjects. I'd like to display both the title and the number of projects in this list.
Not worried about editability right now as we might make that separate (i.e. not in-line in a list view edit mode).
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Similar Messages:
Nov 17, 2010
have some Objects, lets say Employee and Role defined as below and I have defined relationships in my database that gives me a list of objects say employees and thanks to my framework each employee object also has a Role object linked via the RoleIDID, UserName, Password, Email, RoleIDRoleID, RoleNameSo in code I can do something like this
Employee emp = dataService_GetEmployeeByID(1);
string RoleName = emp.Role.RoleName;
Now here is my problemI can bind any object in a repeater and it works fine for the first level in my relationship
For instance <%# Eval("UserName") %>
But I need to be able to show the details for my child objects as well (Role) so something like this (which does not work)
<%# Eval("Role.RoleName") %>
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Apr 6, 2010
I know how to bind a simple objects to a dropdown list. However I am having problems binding my objects which contains sub objects to the control.i.e. with simple object i just do ddl.DataValueField = "myproperty"
with my objects they contains sub objects which i want to bind. I have tried ddl.DataValueField = "sub-object.myproperty" which doesnt work.
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Jan 20, 2010
I have a list view with a label that shows "Step #x", another label with the instructions, and then 2 linkbuttons for editing or deleting. At the footer of the ListView is another button "Add New Step" which opens up an empty TextBox and two buttons to save and cancel. I would also like it to increment the label, but I can seem to find the control in the code behind to change it's text. How do I do this?
Here's the asp markup:
<asp:ListView ID="lvSteps" runat="server" DataSourceID="ldsProcessStep" DataKeyNames="ID" InsertItemPosition="None">
<LayoutTemplate>
<div><asp:PlaceHolder ID="itemPlaceholder" runat="server" /></div>
[Code].....
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Jun 16, 2010
I don't know what I'm doing wrong but for some reason I'm not able to maintain the index selected value on the listview that I've created within a user control. In a user control I have added a listview. I have exposed the handler, Datasource and DataKeyName. I have populated the datasource of the listview by using the following:
MYLIstView.aspx.cs - user control
[Code]....
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Aug 26, 2010
How can I bind an object to a dropdown list or gridview ? I am writing an application where my code behind calls an instance and bind the list to either dropdown or gridview.For example:
.aspx page: default.aspx
<asp:dropdownlist id="dd1" runat="server" />
Code Behind: default.VB
[code]...
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Jun 14, 2010
With ASP.Net 4, is there any way that we can bind web-form controls to entity framework objects?
<asp:TextBox ID="UserName" runat="server" BoundTo="UserName" BindingSource="..."></asp:TextBox>
so just like in MVC I can
form.UpdateModel(userObj),
form.DisplayModel(userObj)
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Nov 24, 2010
I have been reading alot about this and for some reason I am just not able to grasp the concept. Hopefully someone here can enlighten me.As an example situation I have a collection of strongly typed User objects that represent a database table, and some properties that represent its columns: UserID(PK), Username,FirstName,LastName, etc..Here are some of my requirements/goals:1. Users/Objects needs to be bound to the gridview programatically.2. I do not want to update the database right away, I only want the underlying collection to be updated. I would like to call the database update method myself when I am ready.
3. I do not want the primary key stored on the client side.Summary:So I bind a List<Users> to a gridview with the appropriate bound fields set up, I exlude bound fields such as primary key because I don't want it being changed/hacked by the client side. When I edit and update a row it is saved back to the collection of objects. I will iterate through the objects manually at a later time and commit them to database.
Questions:1. Can I cast a gridview row directly back to my object, in the RowUpdating or RowUpdated events? I am assuming I can't... So....2. How can I reference back my original collection if the gridview does not contain a primary key?3. Where do I store my collection, should it be in Session or should I recreate it on each postback?Sorry if any of this is confusing, let me know if you need clarification.
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Jul 16, 2010
I have a List of complex objects containing other objects within that I give as the data source to a gridview.(currently I'm using BoundFields for the columns). I need to bind data to the columns from the objects within at run time. How can this be done?
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Apr 21, 2010
I'm tyring to bind a list of Dictionary objects to ListView, but for some reason it returns me an error, ItemTeplate
[Code]....
Code Behind
[Code]....
error says
[Code]....
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Jun 2, 2010
Listview and objectdatasource binding?
[URL]
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Nov 24, 2010
I have a ListView that does quite a heavy query. I don't want the user to have to wait half a second to a second for the page to load. I would much rather have the page load, display the theme and then have ajax make a call to the server to run the query and bind the listview while a loading icon is displayed.
The only thing i can think of is to use the sys.application.init handler to add some javascript that calls dopostback and passes a command name. I dunno... any thoughts? Anyone do this with aspnet/ajax with update panel? I guess im trying to bind an update panel without requiring a user clicking a button.
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Aug 3, 2010
is it possible to do something like this: Having a listview in my web form to calculate employee's salary, just about around 1000 employees at a time, but due to many conditions to calculate one's salary, the page cost too much time to load the data (about 25s-30s), now it's just nearly 100 employee, but if about the above number of employee (and it will be even more in the future), it will be unbelievable slow,
so I think of a solution like this, the page still load but it just calculate 20 employees at a time and bind it to the listview so the user can see some data to not see it's too too slow to load the page, and after that the page still loading to calculate the rest and bind data to the listview again and now it is 20 + 20 +........ = 40, 60 rows....... (the listview won't reload it just add new rows) I remembered that I saw something like this in Bing.com when load the image searching, and some asp.net gridview have the exact ability as Bing, the grid/lisview load data when user scroll down, but now I can't remember the link and the key words to search for it.
I used LINQ to retrieve data, I did compiled query, and some tweaks to improve performance already, yes, it so much faster than the first time but it still so slow after all.
Note: I have read about loading content while scrolling or scrolling continuous but it not load all the data one by one and bind the data to the listview, it just continue to load the data when user scrolling down and there is no end to it.
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Mar 7, 2011
I have a ListView with an ItemTemplate item as below:
<asp:Label runat="server" ID="lblChangeOrders"><%#Eval("sum")%></asp:Label>
What I need is if the sum is negative I need to set font color as RED and remove the minus sign.
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Apr 22, 2010
I have a function that constructs a datatable from a file that the client uploads. And I want to bind that datatable to a listview but I'm not sure what I'm doing wrong... Say, the datatable is like:
FirstName LastName
John Smith
Here's how my aspx looks like:
[Code]....
In my names.aspx.cs file, I do: lvNames.Datasource = dt; //dt is a datatable
lvNames.DataBind();
When I run my aspx page, the listview is empty, is there something obvious I'm doing wrong?
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May 31, 2010
i have one ajax accordion control and inside that i have a list view inside that control. now listview is bind to objectdatasourcecontrol.
and object data soruce control is bind to a custom class. Now the problem is that i need to naviagate to different pages on the click of the listview items or load user control...Now how to do that?. i am pasting my code here.
[Code]....
and class file which is bind to objectdatasource control
[Code]....
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Jun 20, 2010
I'm using a listview control to show a list of categories/subcategories
<%# Eval("SubCategory1")%> When the user clicks the SubCategory1 link, the list view should fill up with the next subcategory, SubCategory2. The problem is off course that <%# Eval("SubCategory1")%> is hard-coded. I need it to change to <%# Eval("SubCategory2")%>...and so on, as the user is drilling down into the sub-categories.
So is there a way to change <%# Eval("SubCategory1")%> dynamically?
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Oct 4, 2010
I have added a ListView to a web form and this code works when the data columns in the bound dataset have values:
<asp:ListView ID="picturesListView" runat="server"
GroupPlaceholderID="groupsGoHere"
ItemPlaceholderID="itemsGoHere"
[code]...
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Mar 13, 2011
I have anested ListView control. I also implemented a jQuery to automatically expand the TextBox control inside of the nested ListView Insert Template. The problem is, when the Textbox expand, the outer ListView control is not; therefore, the Textbox control expands underneath the buttons of the outer listView control. How do I expand the outer ListView control as the nested ListView textbox is automatically expand? One great example is in Facebook where if I add a response comment, it'll automatically push any comments below mine down. If nested Listview control is not the best way to do this, what are my options?
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Apr 2, 2011
I am trying to implement a nested user control in listview and the user control doesn't get bound.
Here is my code.
[Code]....
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Mar 5, 2010
I'm using VS2008. When a dataset is bound to the DataSource of a ListView, SelectedIndexChanged event does not fire. If I used DataSourceID instead, it has no problem. But SelectedIndexChanging event fires for both.
why and how I can get SelectedIndexChanged event fired when DataSource is used?
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Jun 21, 2010
firstly a static class only ever exists once and is not an instance. Any static members (ie static int NoOfPeople;) is stored in one place and is shared between all sessions (like the old global variables).
Now static methods is where i'm not 100% sure. If I have a static method that doesn't use any other static members could this cause inconstant results, example (this is a fairly pointless method but just a quick example of the top of my head)
[Code]....
So in this example if two sessions (or threads) were to call this at the same time - would they both get back the expected results, because the method only uses private data (a, b and totalToReturn).Im sure this sounds a little simple but I will be using static methods to build user objects and various other objects that there will have to be a 100% garentee that the objects will not get mixed up between sessions and the wrong things return to the user.
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Jan 28, 2010
I'm doing research on framework development for my company. SInce I will be developing a framework I can not simply declaire all my control in the code in front. Receiently I've been having trouble binding the controls from my ListView to my ObjectData Source. Basicly the properties in my DataObjectTypeName are not populated when the ObjectDataSource "Update" command is thrown. I recieve no error, I just get null values. All I need is an equivalent to this statement for code-behind ...
<%# Bind("AbstractText") %>This would solve all my issues. Ofcouse I will most likely need to bind the control's ID somewhere but that is not an issue. How do I Bind a control to a property in my DataObjectTypeName from the code-behind?
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Jan 25, 2010
How can I add custom properties into control objects in ExtJs.
For example :
[code]....
This control comes from server dynamically and I want to write my custom property as well like below :
[code]....
I tried it but it said undefined. Normally since JavaScript is loose, I can easily modify objects but in this case it wouldn't work the way I expected.
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Dec 30, 2010
I have a complex object. For example a SCHOOL object that contains a collection of PERSON object. How can I use the ObjectDataSource control with a FormView and flatten the complex object? An example display would be to display the school name and comma separate the students on the page. Is this possible?
public string Id
{
get { return m_id; }
[code]...
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