|By Xin Yan||
|July 29, 2005 01:45 AM EDT||
One of the new features in Visual Studio 2005 (VS2005) is easier custom control development for .NET Compact Framework. This article is about how to use Visual Studio 2005 to create custom control for .NET Compact Framework and provide design-time support.
Introduction to Custom Control
A Windows Forms custom control is a class that derives directly or indirectly from System.Windows.Forms.Control or System.Windows.Forms.
UserControl. Using custom control technology, developers can easily create powerful, reusable and redistributable Windows Forms controls.
There are three common custom control scenarios:
- Combine existing controls to author a composite control. In this case, the custom control should derive from System.Windows.Forms.UserControl.
- Extend an existing control to add to its functionality. In this case, the custom control should derive from the existing control, such as System.Windows.Forms.TextBox.
- Author a control that doesn’t depend on existing WinForm controls. In this case, the custom control should derive from System.Windows.Forms.Control.
Visual Studio 2005 fully supports creating custom controls in .NET Compact Framework. In addition, custom control developers can create a great design-time experience for custom control users. Design-time support makes it easier for developers to use custom controls in Visual Studio 2005 Smart Device projects.
Usually, building a custom control for .NET Compact Framework consists of two steps:
- Code the custom control
- Add design-time support
In this article I am going to illustrate these steps by building a .NET Compact Framework custom control in Visual Studio 2005. The custom control is for sign-in forms and will look like Figure 1 on a Smartphone device. It is called SignInControl. Developers can utilize this custom control to implement a consistent sign-in experience for their apps. It has the following features:
- Can take user name and password input
- Provides animation functionality
- Can be easily used in Visual Studio 2005 designer
- Supports numeric input mode to help Smartphone users
To follow the article, you will need Visual Studio 2005 Beta 2 and Windows Mobile 5 Smartphone SDK.
Code the Custom Control
SignInControl uses Label and TextBox controls to take user input, and PictureBox to display the animation. Thus it should derive from UserControl.
The first step is to create a Visual Studio Smart Device project. Visual Studio 2005 has many Smart Device project types to choose from. In this example I am going to create a C# SmartPhone Windows Mobile 5 (code named Magneto) Control Library project called SignInControl (see Figure 2).
After creating the project, rename the UserControl1.cs to SignInControl.cs. To protect my custom control assembly from tampering, I also signed my assembly with a strong name key file (right click on the project in the solution explorer, select “Properties,” and click on “Signing” tab). Now I am ready to implement my custom control.
Go to the designer and drop two Label controls, two TextBox controls, one PictureBox control, and one Timer component. When doing this, notice the designer automatically displays snap-line to help aligning the controls. Set the Label controls to have proper text, and set the PasswordChar property of the password TextBox to “*.” Figure 3 is a screenshot of SignInControl in the designer.
Two properties should be added to SignInControl to give developers access to the user name and password entered. Their implementation simply gets or sets the Text property value on the corresponding TextBox controls.
Animation support is provided by the use of Timer and PictureBox. Add a Timer object to SignInControl, set its Interval property to 1000 (one second), and double click it to generate Timer.Tick event handler. The Timer object will raise an event every second. The PictureBox control’s image will be refreshed on each tick to achieve an animation effect.
The images for animation are set in AnimationImages property using ImageList. An AnimationMode property is provided so that developers can turn animation on or off. After adding the above implementation, SignInControl.cs looks like Listing 1.
|Jay Dixit 10/11/07 07:07:23 AM EDT|
Hi truly a great article but i am new for it and just have some queries.
Please help me for this.
|Jacques Herweijer 02/05/07 03:23:28 PM EST|
Hi great article, I completely understand the usercontrols now in a few minutes, its better than reading a book about it ! That however leaves me with 2 unanswered questions hope you can answer them.
My first question is, How can I access the properties of the labels as soon as the usercontrol is used on a form, so I can change the Text property depending on the form I am using it on, or do I have to create a new usercontrol that inhertis your example for each label Text I want to use and drop that one on my form. I think this is very much work for just setting a label.
And then my second one, How can I add controls to the usercontrol when I put it on my form ? For example if I wanted to add a button to the usercontrol when it is on my form but not in de usercontrol class itself (like a panel can contain controls) in Design-time ofcourse.
Hope you can and be willing to give me an answer because I cannot find these answers anywhere. I think its hard to search the web when some functionallity is not available for Smart Device projects.
Anyway Great article that give me a head start.
|.NET News Desk 07/28/05 02:49:36 PM EDT|
Creating Custom Controls for Microsoft .NET Compact Framework in Visual Studio 2005
|.NET News Desk 07/28/05 02:49:30 PM EDT|
Creating Custom Controls for Microsoft .NET Compact Framework in Visual Studio 2005
With the Apple Watch making its way onto wrists all over the world, it’s only a matter of time before it becomes a staple in the workplace. In fact, Forrester reported that 68 percent of technology and business decision-makers characterize wearables as a top priority for 2015. Recognizing their business value early on, FinancialForce.com was the first to bring ERP to wearables, helping streamline communication across front and back office functions. In his session at @ThingsExpo, Kevin Roberts...
Feb. 13, 2016 11:15 PM EST Reads: 433
Cognitive Computing is becoming the foundation for a new generation of solutions that have the potential to transform business. Unlike traditional approaches to building solutions, a cognitive computing approach allows the data to help determine the way applications are designed. This contrasts with conventional software development that begins with defining logic based on the current way a business operates. In her session at 18th Cloud Expo, Judith S. Hurwitz, President and CEO of Hurwitz & ...
Feb. 13, 2016 11:15 PM EST Reads: 314
One of the bewildering things about DevOps is integrating the massive toolchain including the dozens of new tools that seem to crop up every year. Part of DevOps is Continuous Delivery and having a complex toolchain can add additional integration and setup to your developer environment. In his session at @DevOpsSummit at 18th Cloud Expo, Miko Matsumura, Chief Marketing Officer of Gradle Inc., will discuss which tools to use in a developer stack, how to provision the toolchain to minimize onboa...
Feb. 13, 2016 08:00 PM EST Reads: 149
With an estimated 50 billion devices connected to the Internet by 2020, several industries will begin to expand their capabilities for retaining end point data at the edge to better utilize the range of data types and sheer volume of M2M data generated by the Internet of Things. In his session at @ThingsExpo, Don DeLoach, CEO and President of Infobright, will discuss the infrastructures businesses will need to implement to handle this explosion of data by providing specific use cases for filte...
Feb. 13, 2016 02:00 PM EST Reads: 259
SYS-CON Events announced today that Avere Systems, a leading provider of enterprise storage for the hybrid cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Avere delivers a more modern architectural approach to storage that doesn’t require the overprovisioning of storage capacity to achieve performance, overspending on expensive storage media for inactive data or the overbuilding of data centers ...
Feb. 13, 2016 01:30 PM EST Reads: 148
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies adopt disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevO...
Feb. 13, 2016 01:30 PM EST Reads: 291
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management...
Feb. 13, 2016 12:45 PM EST Reads: 476
The Quantified Economy represents the total global addressable market (TAM) for IoT that, according to a recent IDC report, will grow to an unprecedented $1.3 trillion by 2019. With this the third wave of the Internet-global proliferation of connected devices, appliances and sensors is poised to take off in 2016. In his session at @ThingsExpo, David McLauchlan, CEO and co-founder of Buddy Platform, will discuss how the ability to access and analyze the massive volume of streaming data from mil...
Feb. 13, 2016 12:00 PM EST
SYS-CON Events announced today that Alert Logic, Inc., the leading provider of Security-as-a-Service solutions for the cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Alert Logic, Inc., provides Security-as-a-Service for on-premises, cloud, and hybrid infrastructures, delivering deep security insight and continuous protection for customers at a lower cost than traditional security solutions. Ful...
Feb. 13, 2016 12:00 PM EST Reads: 474
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 ad...
Feb. 13, 2016 12:00 PM EST Reads: 454
SYS-CON Events announced today that Men & Mice, the leading global provider of DNS, DHCP and IP address management overlay solutions, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. The Men & Mice Suite overlay solution is already known for its powerful application in heterogeneous operating environments, enabling enterprises to scale without fuss. Building on a solid range of diverse platform support,...
Feb. 13, 2016 11:45 AM EST Reads: 278
WebSocket is effectively a persistent and fat pipe that is compatible with a standard web infrastructure; a "TCP for the Web." If you think of WebSocket in this light, there are other more hugely interesting applications of WebSocket than just simply sending data to a browser. In his session at 18th Cloud Expo, Frank Greco, Director of Technology for Kaazing Corporation, will compare other modern web connectivity methods such as HTTP/2, HTTP Streaming, Server-Sent Events and new W3C event APIs ...
Feb. 13, 2016 11:30 AM EST
Fortunately, meaningful and tangible business cases for IoT are plentiful in a broad array of industries and vertical markets. These range from simple warranty cost reduction for capital intensive assets, to minimizing downtime for vital business tools, to creating feedback loops improving product design, to improving and enhancing enterprise customer experiences. All of these business cases, which will be briefly explored in this session, hinge on cost effectively extracting relevant data from ...
Feb. 13, 2016 11:30 AM EST Reads: 159
Companies can harness IoT and predictive analytics to sustain business continuity; predict and manage site performance during emergencies; minimize expensive reactive maintenance; and forecast equipment and maintenance budgets and expenditures. Providing cost-effective, uninterrupted service is challenging, particularly for organizations with geographically dispersed operations.
Feb. 13, 2016 11:00 AM EST
There will be new vendors providing applications, middleware, and connected devices to support the thriving IoT ecosystem. This essentially means that electronic device manufacturers will also be in the software business. Many will be new to building embedded software or robust software. This creates an increased importance on software quality, particularly within the Industrial Internet of Things where business-critical applications are becoming dependent on products controlled by software. Qua...
Feb. 13, 2016 11:00 AM EST
SYS-CON Events announced today that iDevices®, the preeminent brand in the connected home industry, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. iDevices, the preeminent brand in the connected home industry, has a growing line of HomeKit-enabled products available at the largest retailers worldwide. Through the “Designed with iDevices” co-development program and its custom-built IoT Cloud Infrastruc...
Feb. 13, 2016 11:00 AM EST Reads: 155
Join us at Cloud Expo | @ThingsExpo 2016 – June 7-9 at the Javits Center in New York City and November 1-3 at the Santa Clara Convention Center in Santa Clara, CA – and deliver your unique message in a way that is striking and unforgettable by taking advantage of SYS-CON's unmatched high-impact, result-driven event / media packages.
Feb. 13, 2016 10:00 AM EST Reads: 105
As enterprises work to take advantage of Big Data technologies, they frequently become distracted by product-level decisions. In most new Big Data builds this approach is completely counter-productive: it presupposes tools that may not be a fit for development teams, forces IT to take on the burden of evaluating and maintaining unfamiliar technology, and represents a major up-front expense. In his session at @BigDataExpo at @ThingsExpo, Andrew Warfield, CTO and Co-Founder of Coho Data, will dis...
Feb. 13, 2016 09:45 AM EST Reads: 234
Silver Spring Networks, Inc. (NYSE: SSNI) extended its Internet of Things technology platform with performance enhancements to Gen5 – its fifth generation critical infrastructure networking platform. Already delivering nearly 23 million devices on five continents as one of the leading networking providers in the market, Silver Spring announced it is doubling the maximum speed of its Gen5 network to up to 2.4 Mbps, increasing computational performance by 10x, supporting simultaneous mesh communic...
Feb. 13, 2016 05:00 AM EST
Eighty percent of a data scientist’s time is spent gathering and cleaning up data, and 80% of all data is unstructured and almost never analyzed. Cognitive computing, in combination with Big Data, is changing the equation by creating data reservoirs and using natural language processing to enable analysis of unstructured data sources. This is impacting every aspect of the analytics profession from how data is mined (and by whom) to how it is delivered. This is not some futuristic vision: it's ha...
Feb. 13, 2016 04:45 AM EST Reads: 475