What basics should be remembered while developing win form apps?
Some Important Points for designing Windows Applications :
How do I change the icon of the application I am working with?
Changing the Icon of your application is simple. Select Project->Properties. In the windows "style" section click on the "Icon" Button. Then make your choice.
What are win form controls? How they are represented in .NET framework class library?
A form may contain various user interface (UI) controls. The controls represent the visual components that allow user to interact with the application and perform the desired task. All the controls, in .Net, are represented by subclasses of System.Windows.Forms.Control class.
Each form has a collection (named ‘Controls’) to store the constituent controls of the form. In fact, a form itself is a special type of control called Container Control, i.e., the Form class itself is derived from the ContainerControl class which is a subclass of the Control class. A container control, as the name suggests, may contain other controls. Other examples of the Container control include Panel and Tab Control.
Each control, and thus form, exposes a number of events that can be triggered on certain user action or application behavior. For example, a button raises Click event whenever it is clicked and the text box raises the TextChanged event whenever its text is changed. The application developer can write even handler to catch these events and perform corresponding action. Beside these, a form also has certain set of events called the form life cycle events. These events are triggered during the life cycle of form to indicate the current state of the form.
What are the fundamental and common properties of .NET controls?
Almost all the controls have some similar properties like Location, Size, Enabled, Visible, TabIndex, Name, Text, BacKColor, ForeColor, Font, etc. The TabIndex property is very important. It describes the sequence followed by the windows focus when the user presses the Tab button of keyboard
How do I set the tab order of the controls on the form?
To set the tab order of the controls on the form, select View -> Tab Order. This will start a wizard for setting the tab order. You can set the order of tab for the control by just clicking it in the same sequence as of required tab order.
What does it mean by anchoring of controls?
An anchoring is the property of the control to keep a specific distance with a particular edge of the window (or other containing control). You can anchor a control to any edge or side of the window, e.g., left, top, right, bottom, left and top, etc. If a control is anchored to the left of the window, it will keep the constant distance from the left side of the window; even when the window is resized. The constant distance that the control will keep with the window is the distance it has at the form startup or defined by its Location property. In the figure below, the button is anchored to the top edge of the window.
When the window is resized, it shifts itself on the form to keep the same distance from the top, see the figure below:
If we have defined the top and bottom anchoring and the form is resized, the control will resize itself to have the same distance from top and bottom. Consider the figure below; here the button is anchored top and bottom
When the form is resized, the button resizes itself to keep the same distance from top and bottom
The default anchoring of a control is left and top.
How do I set the anchoring property of my controls?
To change the anchoring property of the control, set the Anchor property of the control from the properties window. When you click the Anchor property of the control in the properties window, Visual Studio.NET will show you a tab to set the edges with which you wish to anchor the control
What does it mean by docking of controls?
Docking is the property of the control to attach itself to a particular edge of the window (or other containing control). You can either dock a control to an edge or to fill the available space in the parent control or window. Common examples of docking includes menu bar and toolbars which dock themselves at the top of the window so that they may remain at top regardless of the size and of the window.
How do I set the docking property of my controls?
To change the docking property of the control, set the Dock property of the control from the properties window. When you click the Dock property of the control in the properties window, Visual Studio.NET will show you a tab to set the edges with which you wish to dock the control .
How do I set the width of a ComboBox to fit the contents?
Move through the index items to find the longest item by character length using the MeasureString function. Use the this value as the ComboBox width.
How do I set the color and font in a RichEditBox?
Use the SelectionFont and SelectionColor properties to set the font and color of a RichEditBox. The following code will set the "selected text" to a blue-italic-verdana font set.
How to use the Splitter control?
The Splitter control is used to resize other controls. The purpose of this is to save space on the form.
This control can be very useful when you are working with controls both at design time and run time (which are not visible at design time).
How do I place restriction when entering some text in a textbox?
You can restrict a user from entering text against a set pattern. Or you can request the user only to enters certain type of characters.
RELATED POST
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART ONE
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART TWO
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART THREE
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART FOUR
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART FIVE
ADO.NET INTERVIEW QUESTIONS AND ANSWERS PART ONE
ADO.NET INTERVIEW QUESTIONS AND ANSWERS PART TWO
You can also learn the concept of frame work concept in detail with questions and answers in the following place.
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART ONE
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART TWO
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART THREE
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART FOUR
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART FIVE
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART SIX
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART SEVEN
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART EIGHT
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART NINE
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART TEN
Some Important Points for designing Windows Applications :
- • Make your form layout simple and easy to understand. It is important that the user of your application finds it familiar. The behavior should be expected and should not surprise the user.
- • The Format menu of the Visual Studio.NET IDE is very useful when designing the form layout. It provides a number of useful options for alignment and size of the controls.
- • Almost all the controls have some similar properties like Location, Size, Enabled, Visible, TabIndex, etc. The TabIndex property is very important. It describes the sequence followed by the windows focus when the user presses the Tab button of keyboard.
- • Usually we don't change the Name property of labels as we don’t need to use the label variable in our code most of the time.
- • The controls should be named so that their purpose can be recognized, e.g., you may name the ‘Purchase’ button as btnPurchase, text box for entering email may be txtEmail and so on.
- • Although now it is not a standard convention, but it is useful to add a three letter prefix to the name of your controls so that they are recognizable with their name. Most of the developers used to follow the convention like prefixing Label with lbl (lblGreeting), TextBox with txt (txtComments), Button with btn (btnPurchase), CheckBox with cbx (cbxProgCS), RadioButton with rbn (rbnFullPayment) and GroupBox with gbx (gbxPaymentMode).
How do I change the icon of the application I am working with?
Changing the Icon of your application is simple. Select Project->Properties. In the windows "style" section click on the "Icon" Button. Then make your choice.
What are win form controls? How they are represented in .NET framework class library?
A form may contain various user interface (UI) controls. The controls represent the visual components that allow user to interact with the application and perform the desired task. All the controls, in .Net, are represented by subclasses of System.Windows.Forms.Control class.
Each form has a collection (named ‘Controls’) to store the constituent controls of the form. In fact, a form itself is a special type of control called Container Control, i.e., the Form class itself is derived from the ContainerControl class which is a subclass of the Control class. A container control, as the name suggests, may contain other controls. Other examples of the Container control include Panel and Tab Control.
Each control, and thus form, exposes a number of events that can be triggered on certain user action or application behavior. For example, a button raises Click event whenever it is clicked and the text box raises the TextChanged event whenever its text is changed. The application developer can write even handler to catch these events and perform corresponding action. Beside these, a form also has certain set of events called the form life cycle events. These events are triggered during the life cycle of form to indicate the current state of the form.
What are the fundamental and common properties of .NET controls?
Almost all the controls have some similar properties like Location, Size, Enabled, Visible, TabIndex, Name, Text, BacKColor, ForeColor, Font, etc. The TabIndex property is very important. It describes the sequence followed by the windows focus when the user presses the Tab button of keyboard
How do I set the tab order of the controls on the form?
To set the tab order of the controls on the form, select View -> Tab Order. This will start a wizard for setting the tab order. You can set the order of tab for the control by just clicking it in the same sequence as of required tab order.
What does it mean by anchoring of controls?
An anchoring is the property of the control to keep a specific distance with a particular edge of the window (or other containing control). You can anchor a control to any edge or side of the window, e.g., left, top, right, bottom, left and top, etc. If a control is anchored to the left of the window, it will keep the constant distance from the left side of the window; even when the window is resized. The constant distance that the control will keep with the window is the distance it has at the form startup or defined by its Location property. In the figure below, the button is anchored to the top edge of the window.
When the window is resized, it shifts itself on the form to keep the same distance from the top, see the figure below:
If we have defined the top and bottom anchoring and the form is resized, the control will resize itself to have the same distance from top and bottom. Consider the figure below; here the button is anchored top and bottom
When the form is resized, the button resizes itself to keep the same distance from top and bottom
The default anchoring of a control is left and top.
How do I set the anchoring property of my controls?
To change the anchoring property of the control, set the Anchor property of the control from the properties window. When you click the Anchor property of the control in the properties window, Visual Studio.NET will show you a tab to set the edges with which you wish to anchor the control
What does it mean by docking of controls?
Docking is the property of the control to attach itself to a particular edge of the window (or other containing control). You can either dock a control to an edge or to fill the available space in the parent control or window. Common examples of docking includes menu bar and toolbars which dock themselves at the top of the window so that they may remain at top regardless of the size and of the window.
How do I set the docking property of my controls?
To change the docking property of the control, set the Dock property of the control from the properties window. When you click the Dock property of the control in the properties window, Visual Studio.NET will show you a tab to set the edges with which you wish to dock the control .
How do I set the width of a ComboBox to fit the contents?
Move through the index items to find the longest item by character length using the MeasureString function. Use the this value as the ComboBox width.
How do I set the color and font in a RichEditBox?
Use the SelectionFont and SelectionColor properties to set the font and color of a RichEditBox. The following code will set the "selected text" to a blue-italic-verdana font set.
How to use the Splitter control?
The Splitter control is used to resize other controls. The purpose of this is to save space on the form.
This control can be very useful when you are working with controls both at design time and run time (which are not visible at design time).
How do I place restriction when entering some text in a textbox?
You can restrict a user from entering text against a set pattern. Or you can request the user only to enters certain type of characters.
RELATED POST
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART ONE
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART TWO
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART THREE
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART FOUR
ASP.NET INTERVIEW QUESTIONS AND ANSWERS PART FIVE
ADO.NET INTERVIEW QUESTIONS AND ANSWERS PART ONE
ADO.NET INTERVIEW QUESTIONS AND ANSWERS PART TWO
You can also learn the concept of frame work concept in detail with questions and answers in the following place.
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART ONE
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART TWO
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART THREE
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART FOUR
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART FIVE
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART SIX
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART SEVEN
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART EIGHT
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART NINE
MICROSOFT DOT NET FRAME WORK QUESTIONS AND ANSWERS PART TEN
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