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Advanced Basics: Data Binding Radio Buttons to a List

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net
 

More Related Resource Links

Advanced Basics: Data Binding in Visual Basic .NET

  

Ken Spencer introduces data binding in Visual Basic .NET.

Ken Spencer

MSDN Magazine August 2003


Data Binding a DataGrid to a list fetch the same data multiple times

  
Hi, I'm using DataGrid to show data through data binding. My data are provided in a list. The setup I have is the following: DataGrid "binded" to the default view of my list that implement IList<T> and IList interfaces (MyList<T> : IList<T>, IList, INotifyCollectionChanged)             CollectionViewSource.GetDefaultView(_myList);             // Set the data context             DataContext = view; T: is here my 'business object' that hold the data, called 'MyRow'. Then the columns of the DataGrid are bound to public properties of 'MyRow' object. MyRow class has a public property of type 'object' (public object data[int index]) and first column of datagrid is bound to myRow.data[0], second column is bound to myRow.data[1] and so on.   When the datagrid is displayed, databinding kick in and my data are showed in the control. The issue I'm having is that data fetching is very repetitive even for the same rows. For example for a datagrid with 20 visible rows, the first row is fetched multiple times even if the datagrid is not resized or moved. I put break point inside my list (MyList<T> into This[T] property (public T this[int index]) and i got multiple hits into the property for the same index. Fetc

Binding list to form not working with '&' character in list field data

  
Hi, I have a SharePoint list with a field called Title. I have a form based on this list with the field bound to the form as a label (for workflow to access). Here is the code for the form field. <asp:Label runat="server" id="ff2{$Pos}" text="{@Title}" __designer:bind="{ddwrt:DataBind('u',concat('ff2',$Pos),'Text','','ID',ddwrt:EscapeDelims(string(@ID)),'@Title')}" /> I have a workflow that runs through a form action button which take ff2 (title) and  does other stuff. The problem I have is with records where the value of 'title' contains the '&' character (example ab&cd). Blank is pulled in by the workflow when I get the value of ff2. I am guessing it has to do with the data binding and/or escape (special) characters coming through but I don't know how to fix it. Any help will be greatly appreciated

Drop down list not data binding

  

 Hi,

 

I am trying to data bind a drop down list inside a formview but for some reason when I click the update button I get the follwoing error message:

'ddl_activity_status' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentOutOfRangeException: 'ddl_activity_status' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.


Stack Trace:

[ArgumentOutOfRangeException: 'ddl_activity_status' has a SelectedValue which is inval

Binding WPF Controls to an Entity Data Model

  
In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

Gridview with Radio Buttons

  
As now, Radio buttons are HTML controls, I am not able to get it on server side. When user select any radio button and press submit, Control will not available at code behind, you can use "e.Item.FindControl" as it is not "runat='server'". I want ID "Primary Key" value for selected radio button. To achive this I took the help of Javascript. I wrote javascript function that sets the values of "Primary Key" in hidden field when user clicks on any radio button. Now when user clicks on Submit button, user can get selected value froim hidden field.

Binding WPF Controls to an Entity Data Model

  
In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

Editable Gridview with Textbox, CheckBox, Radio Button and DropDown List

  
This is an example of an editable gridview containing different ASP.NET controls. When user wants to edit values in gridview, she/he can use these controls to edit existing values in Gridview Edit Mode.

Using the Code

Binding an array to dropdown list

  

I have the following string which is a list of urls. How do I get this to work so the url shows for the selection and also is the value?      

 

allLinks = newAllLinks
        Me.DropDownList1.Items.Clear()
        Me.DropDownList1.DataTextField = "Link"
        Me.DropDownList1.DataValueField = "LinkURL"
        Me.DropDownList1.Items.Insert(0, New ListItem(" - Select - ", 0))
        Me.DropDownList1.DataSource = allLinks
        Me.DropDownList1.DataBind()


 

 ArgumentNullException: Value cannot be null.
Parameter name: container]
   System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName) +121
   System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName, String format) +8
   System


Cutting Edge: Live Data Binding in ASP.NET AJAX 4.0

  

Dino Esposito discusses various forms of client-side data binding as they are coming out in ASP.NET AJAX 4.0, focusing on some advanced features of data binding and observable objects.

Dino Esposito

MSDN Magazine December 2009


Cutting Edge: Data Binding in ASP.NET AJAX 4.0

  

In this article, Dino reviews the pillars of real-world AJAX development as supported in ASP.NET AJAX 4.0. In doing so, he mostly focuses on client-side templates and data-binding but doesn't ignore other goodies, such as ADO.NET Data Services proxy classes and programming facilities.

Dino Esposito

MSDN Magazine October 2009


Dynamic WPF: Create Flexible UIs With Flow Documents And Data Binding

  

Flow documents offer enormous flexibility in arranging text layout and pagination, but they don't support data binding, so you can't dynamically change content. Here we build a component to solve that problem.

Vincent Van Den Berghe

MSDN Magazine April 2009


Advanced Basics: The ObservableCollection Class

  

Ken Getz shows how the CollectionChanged event lets you reflect changes to your underlying data source in your bound data controls.

Ken Getz

MSDN Magazine December 2008


Advanced Basics: The LINQ Enumerable Class, Part 2

  

This month Ken digs deeper into the System.Linq.Enumerable class and shows readers how to perform some magic data operations using System.Linq.Enumerable.

Ken Getz

MSDN Magazine September 2008


Data and WPF: Customize Data Display with Data Binding and WPF

  

Here we present techniques for programmatic and declarative data binding and display with Windows Presentation Foundation.

Josh Smith

MSDN Magazine July 2008


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