.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Register
 
Win Surprise Gifts!!!
Congratulations!!!


Top 5 Contributors of the Month
Easy Web
Imran Ghani
Post New Web Links

Drag and Drop data binding and Enums

Posted By:      Posted Date: August 27, 2010    Points: 0   Category :WPF
 
I'm using Visual Studio 2010 to design a simple WPF application. I created a simple class, with some Enum property, and added the class as a new data source, then dragged and dropped it from the Data sources window as a DataGrid. The result is a data grid that works properly, except for enum handling. Obviously, I want enums to be displayed as combo boxes, so I set the option. The problem is: I get a combo box column, but it is NOT populated with the Enum's values, instead only the current value is displayed and the user can't change it. This behavior seems completely useless to me. Am I doing something wrong here, or is there another explanation for this? Why isn't the designer handling enums in a sensible way? Another problem is, if I choose to drag the class as "Details". Again everything works except enums. I get a standalone combobox, but it displays the values of the property from the entire list, and choosing a different item in the combobox changes the active bound property. Once again, useless behavior - I expect the designer to create a combobox populated with values from the Enum, and for it to act like every other control in a master-details relationship - choosing a different value changes the state of the current item. Please advise.


View Complete Post


More Related Resource Links

Scott Howlett and Jeff Dunmall: Drag and Drop Data Manipulation Powered by XML

  

Building on the browser-based org chart featuring VML (Vector Markup Language) described previously in Microsoft Internet Developer, this article takes you through the process of refining that sample app by using XML, XSL, and JScript code to create a new, improved version. Drag and drop editing is added to the org chart interface thanks to built-in support found in Internet Explorer 5.0. XML and JScript allow data manipulated on the screen to be saved back to the server in its native format. The final product of this combination of XML, XSL, and VML is a high performance, scalable Internet app that uses processing on the client to reduce stress for the server.

Scott Howlett and Jeff Dunmall

MSDN Magazine March 2000


Data Flow Task failing to drag-and-drop onto SSIS Control Flow

  
This morning, I started having problems with Visual Studio 2005 on XP when I tried to create an SSIS project; I was getting an error message about the failure to create an SSIS runtime object, with the reference "Unable to cast COM of type 'Microsoft.SqlServer.DTS.Runtime.Wrapper.PackageNeutralClass' to interface type". Digging here and elsewhere on the Net, I used regsvr32 to re-register msxml3.dll, msxml6.dll, and dts.dll. This allowed me to create a new SSIS project, but I was unable to add a data flow task to the Control Flow pane -- when I dragged the control onto the pane, nothing happened, and when opened the Data Flow pane and clicked on the 'No data flow task has been defined. Click here to create a data flow task" link, I got a 'Failed to create the task. The designer could not be initialized." error. Searching here and on the Net, I uninstalled and reinstalled the SQL Server 2005 workstation tools.

After doing this, I am still unable to create a data flow task by dragging the task out of the toolbox; the pointer assumes the right form for the drag-and-drop, as it does for other tasks, but when I release the mouse button, nothing happens. However, when I go to the Data Flow pane and click on the 'click here to create a new data flow task', it creates the task, and I am able to use copy-and-paste to make copies of the data flow task

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.

Binding the multiple drop down boxes in GridView using JQuery in ASP.NET

  
Here is the code for binding the multiple drop down boxes in GridView using JQuery in ASP.NET

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.

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


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


Extreme ASP.NET: The Only Data-binding Control You'll Ever Need

  

Fritz Onion demonstrates how the ListView control in ASP.NET 3.5 makes data-binding tasks easier with support for styling with CSS, flexible pagination, and a full complement of sorting, inserting, deleting, and updating features.

Fritz Onion

MSDN Magazine March 2008


Wicked Code: Drag and Drop with ASP.NET AJAX

  

Jeff Prosise shows how you can implement drag-and-drop functionality in your Web app with ASP.NET AJAX.

Jeff Prosise

MSDN Magazine January 2008


Data Points: Data Binding in WPF

  

WPF is one of the most important new technologies in the .NET Framework 3.0. This month John Papa introduces its data binding capabilities.

John Papa

MSDN Magazine December 2007


Extend ASP.NET: Simplify Data Binding In ASP.NET 2.0 With Our Custom Control

  

The wwDataBinder control addresses simple control data binding--binding simple form controls like textboxes, checkboxes, and the selected values of list controls to individual data or object values.

Rick Strahl

MSDN Magazine December 2006


Office Unbound: Bring Your Documents To Life With Data Binding In Visual Studio Tools For Office

  

Thanks to Visual Studio 2005 Tools for the Microsoft Office System, Windows Forms controls can be bound to databases, Web services, or objects and added to a workbook or document. Find out how.

Eric Carter and Eric Lippert

MSDN Magazine March 2006


Data Binding: Give Your Everyday Custom Collections a Design-Time Makeover

  

In this article, Paul Ballard shows how you can provide data binding support for your custom collections to enable sorting, searching, and editing in as simple a manner as possible. In addition, he shows how to make all of these features available in the Windows and Web Forms Designers, just like an ADO.NET DataSet.

Paul Ballard

MSDN Magazine August 2005


Cutting Edge: Collections and Data Binding

  

When it's time to design the Data Access Layer (DAL) of your distributed Microsoft® . NET Framework-based app, one of the key decisions you'll make is how you'll pass data to and from methods of DAL classes.

Dino Esposito

MSDN Magazine May 2005


Categories: 
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend