Label Control in VB.NET

A Label control is used as a display medium for text on Forms. Label control does not participate in user input or capture mouse or keyboard events.
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A Label control is used as a display medium for text on Forms. Label control does not participate in user input or capture mouse or keyboard events.
In this article, I will discuss how to create a Label control in Windows Forms at design-time as well as run-time. After that, I will continue discussing various properties and methods available for the Label control.

Creating a Label

There are two ways to create a control.

Design-time

First, we can use the Form designer of Visual Studio to create a control at design-time. In design-time mode, we can use visual user interfaces to create a control properties and write methods.

To create a Label control at design-time, you simply drag and drop a Label control from Toolbox to a Form. After you drag and drop a Label on a Form. The Label looks like Figure 1. Once a Label is on the Form, you can move it around and resize it using mouse and set its properties and events.

 

LableImg1.jpg
Figure 1

Run-time

Label class represents a Label control. We simply create an instance of Label class, set its properties and add this it to the Form controls.

In the first step, we create an instance of the Label class. The following code snippet creates a Label control object.

Dim dynamicLabel As New Label()

 

In the next step, we set properties of a Label control. The following code snippet sets background color, foreground color, Text, Name, and Font properties of a Label.

dynamicLabel.Name = "DynamicLabel"

dynamicLabel.BackColor = Color.Red

dynamicLabel.ForeColor = Color.Blue

dynamicLabel.Text = "I am a Dynamic Label"

dynamicLabel.Font = New Font("Georgia", 16)

 

In the last step, we need to add a Label control to the Form by calling Form.Controls.Add method. The following code snippet adds a Label control to a Form.

 

Me.Controls.Add(dynamicLabel

 

Setting Label Properties

After you place a Label control on a Form, the next step is to set properties.

The easiest way to set properties is from the Properties Window. You can open Properties window by pressing F4 or right click on a control and select Properties menu item. The Properties window looks like Figure 2.

 

LableImg2.jpg
Figure 2

Name

Name property represents a unique name of a Label control. It is used to access the control in the code. The following code snippet sets and gets the name and text of a Label control.

dynamicLabel.Name = "DynamicLabel"

Dim name As String = dynamicLabel.Name

Location, Height, Width, and Size

The Location property takes a Point that specifies the starting position of the Label on a Form. The Size property specifies the size of the control. We can also use Width and Height property instead of Size property. The following code snippet sets Location, Width, and Height properties of a Label control.

dynamicLabel.Location = New Point(20, 150)

dynamicLabel.Height = 40

dynamicLabel.Width = 300

Background, Foreground, BorderStyle

BackColor and ForeColor properties are used to set background and foreground color of a Label respectively. If you click on these properties in Properties window, the Color Dialog pops up.

Alternatively, you can set background and foreground colors at run-time. The following code snippet sets BackColor and ForeColor properties.

dynamicLabel.BackColor = Color.Red

dynamicLabel.ForeColor = Color.Blue

You can also set borders style of a Label by using the BorderStyle property. The BorderStyle property is represented by a BorderStyle enumeration that has three values â€" FixedSingle, Fixed3D, and None.  The default value of border style is Fixed3D. The following code snippet sets the border style of a Label to FixedSingle.

dynamicLabel.BorderStyle = BorderStyle.FixedSingle

Font

Font property represents the font of text of a Label control. If you click on the Font property in Properties window, you will see Font name, size and other font options. The following code snippet sets Font property at run-time.

dynamicLabel.Font = New Font("Georgia", 16)

Text, TextAlign, and TextLength

Text property of a Label represents the current text of a Label control. The TextAlign property represents text alignment that can be Left, Center, or Right.

The following code snippet sets the Text and TextAlign properties of a Label control.

dynamicLabel.Text = "I am Dynamic Label"

dynamicLabel.TextAlign  = HorizontalAlignment.Center

Append Text

We can append text to a Label by simply setting Text property to current text plus new text you would want to append something like this.

dynamicLabel.Text += " Appended text"

AutoEllipsis

An ellipsis character (...) is used to give an impression that a control has more characters but it could not fit in the current width of the control. Figure 3 shows an example of an ellipsis character.

LableImg3.jpg

If AutoEllipsis property is true, it adds ellipsis character to a control if text in control does not fit. You may have to set AutoSize to false to see the ellipses character. The following code snippet sets the AutoEllipsis property to true.

dynamicLabel.AutoEllipsis = True

Image in Label

The Image property of a Label control is used to set a label background as an image. The Image property needs an Image object. The Image class has a static method called FromFile that takes an image file name with full path and creates an Image object.

You can also align image and text. The ImageAlign and TextAlign properties of Button are used for this purpose.

The following C# code snippet sets an image as a Label background.

dynamicLabel.Image = Image.FromFile("C:\Images\Dock.jpg")

dynamicLabel.ImageAlign = ContentAlignment.MiddleRight

dynamicLabel.TextAlign = ContentAlignment.MiddleLeft

dynamicLabel.FlatStyle = FlatStyle.Flat

 

Summary

A Label control is used to display text on a Form. In this article, we discussed discuss how to create a Label control in Windows Forms at design-time as well as run-time. After that, we saw how to use various properties and methods.

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