|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
Amazon has gradually rolled out parts of its IoT offerings in the last year, but these are just the tip of the iceberg. In addition to optimizing their back-end AWS offerings, Amazon is laying the ground work to be a major force in IoT – especially in the connected home and office. Amazon is extending its reach by building on its dominant Cloud IoT platform, its Dash Button strategy, recently announced Replenishment Services, the Echo/Alexa voice recognition control platform, the 6-7 strategic...
Jul. 29, 2016 11:15 AM EDT Reads: 664
SYS-CON Events announced today that LeaseWeb USA, a cloud Infrastructure-as-a-Service (IaaS) provider, will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. LeaseWeb is one of the world's largest hosting brands. The company helps customers define, develop and deploy IT infrastructure tailored to their exact business needs, by combining various kinds cloud solutions.
Jul. 29, 2016 11:15 AM EDT Reads: 1,329
The cloud market growth today is largely in public clouds. While there is a lot of spend in IT departments in virtualization, these aren’t yet translating into a true “cloud” experience within the enterprise. What is stopping the growth of the “private cloud” market? In his general session at 18th Cloud Expo, Nara Rajagopalan, CEO of Accelerite, explored the challenges in deploying, managing, and getting adoption for a private cloud within an enterprise. What are the key differences between wh...
Jul. 29, 2016 09:45 AM EDT Reads: 2,126
For basic one-to-one voice or video calling solutions, WebRTC has proven to be a very powerful technology. Although WebRTC’s core functionality is to provide secure, real-time p2p media streaming, leveraging native platform features and server-side components brings up new communication capabilities for web and native mobile applications, allowing for advanced multi-user use cases such as video broadcasting, conferencing, and media recording.
Jul. 29, 2016 09:45 AM EDT Reads: 1,027
SYS-CON Events announced today that Venafi, the Immune System for the Internet™ and the leading provider of Next Generation Trust Protection, will exhibit at @DevOpsSummit at 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Venafi is the Immune System for the Internet™ that protects the foundation of all cybersecurity – cryptographic keys and digital certificates – so they can’t be misused by bad guys in attacks...
Jul. 29, 2016 09:45 AM EDT Reads: 1,462
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...
Jul. 29, 2016 07:15 AM EDT Reads: 1,635
In addition to all the benefits, IoT is also bringing new kind of customer experience challenges - cars that unlock themselves, thermostats turning houses into saunas and baby video monitors broadcasting over the internet. This list can only increase because while IoT services should be intuitive and simple to use, the delivery ecosystem is a myriad of potential problems as IoT explodes complexity. So finding a performance issue is like finding the proverbial needle in the haystack.
Jul. 29, 2016 06:45 AM EDT Reads: 2,367
Machine Learning helps make complex systems more efficient. By applying advanced Machine Learning techniques such as Cognitive Fingerprinting, wind project operators can utilize these tools to learn from collected data, detect regular patterns, and optimize their own operations. In his session at 18th Cloud Expo, Stuart Gillen, Director of Business Development at SparkCognition, discussed how research has demonstrated the value of Machine Learning in delivering next generation analytics to imp...
Jul. 29, 2016 04:45 AM EDT Reads: 2,571
The 19th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Digital Transformation, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportuni...
Jul. 29, 2016 04:15 AM EDT Reads: 2,680
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform. In his session at @ThingsExpo, Craig Sproule, CEO of Metavine, demonstrated how to move beyond today's coding paradigm and shared the must-have mindsets for removing complexity from the develo...
Jul. 29, 2016 02:45 AM EDT Reads: 1,615
SYS-CON Events announced today that MangoApps will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. MangoApps provides modern company intranets and team collaboration software, allowing workers to stay connected and productive from anywhere in the world and from any device.
Jul. 29, 2016 02:30 AM EDT Reads: 1,467
Large scale deployments present unique planning challenges, system commissioning hurdles between IT and OT and demand careful system hand-off orchestration. In his session at @ThingsExpo, Jeff Smith, Senior Director and a founding member of Incenergy, will discuss some of the key tactics to ensure delivery success based on his experience of the last two years deploying Industrial IoT systems across four continents.
Jul. 29, 2016 02:00 AM EDT Reads: 1,697
Basho Technologies has announced the latest release of Basho Riak TS, version 1.3. Riak TS is an enterprise-grade NoSQL database optimized for Internet of Things (IoT). The open source version enables developers to download the software for free and use it in production as well as make contributions to the code and develop applications around Riak TS. Enhancements to Riak TS make it quick, easy and cost-effective to spin up an instance to test new ideas and build IoT applications. In addition to...
Jul. 29, 2016 12:15 AM EDT Reads: 2,012
Identity is in everything and customers are looking to their providers to ensure the security of their identities, transactions and data. With the increased reliance on cloud-based services, service providers must build security and trust into their offerings, adding value to customers and improving the user experience. Making identity, security and privacy easy for customers provides a unique advantage over the competition.
Jul. 28, 2016 11:45 PM EDT Reads: 1,275
"We've discovered that after shows 80% if leads that people get, 80% of the conversations end up on the show floor, meaning people forget about it, people forget who they talk to, people forget that there are actual business opportunities to be had here so we try to help out and keep the conversations going," explained Jeff Mesnik, Founder and President of ContentMX, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jul. 28, 2016 10:15 PM EDT Reads: 1,454
"There's a growing demand from users for things to be faster. When you think about all the transactions or interactions users will have with your product and everything that is between those transactions and interactions - what drives us at Catchpoint Systems is the idea to measure that and to analyze it," explained Leo Vasiliou, Director of Web Performance Engineering at Catchpoint Systems, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York Ci...
Jul. 28, 2016 10:00 PM EDT Reads: 2,107
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 19th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo Silicon Valley Call for Papers is now open.
Jul. 28, 2016 09:00 PM EDT Reads: 2,731
I wanted to gather all of my Internet of Things (IOT) blogs into a single blog (that I could later use with my University of San Francisco (USF) Big Data “MBA” course). However as I started to pull these blogs together, I realized that my IOT discussion lacked a vision; it lacked an end point towards which an organization could drive their IOT envisioning, proof of value, app dev, data engineering and data science efforts. And I think that the IOT end point is really quite simple…
Jul. 28, 2016 07:15 PM EDT Reads: 1,263
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jul. 28, 2016 05:30 PM EDT Reads: 2,236
You think you know what’s in your data. But do you? Most organizations are now aware of the business intelligence represented by their data. Data science stands to take this to a level you never thought of – literally. The techniques of data science, when used with the capabilities of Big Data technologies, can make connections you had not yet imagined, helping you discover new insights and ask new questions of your data. In his session at @ThingsExpo, Sarbjit Sarkaria, data science team lead ...
Jul. 28, 2016 04:30 PM EDT Reads: 1,223