BarCodeControl Class

Displays a bar code.

Assembly : DevExpress.XtraEditors.v25.2.dll

NuGet Package : DevExpress.Win.Navigation

Declaration

C#
VB.NET

csharp

[DXLicenseWinFormsEditors]
public class BarCodeControl :
    BaseStyleControl

<DXLicenseWinFormsEditors>
Public Class BarCodeControl
    Inherits BaseStyleControl

Remarks

The BarCodeControl supports multiple bar code types. The following images illustrate some of them.

QR Code	EAN 8	PDF417

The bar code type is specified by the BarCodeControl.Symbology property.

At design time within Visual Studio, you can set this property using the Properties window.
To specify the symbology in code, create a specific BarCodeGeneratorBase descendant and assign it to the Symbology property of the BarCodeControl.

Some of the main bar code options are described below.

The bar code is generated from the BarCodeControl ‘s Text. To prevent the text from being displayed next to the bar code, use the BarCodeControl.ShowText property.
To define the orientation of a bar code and its text, use the BarCodeControl.Orientation property.
To specify the width of bars within a bar code, do one of the following.
To specify the alignment of a bar code and/or its text, use the following properties.

Tooltips

DevExpress controls support regular and super tooltips. Enable the ShowToolTips option to display tooltips when the mouse pointer hovers over the control.

Customize Regular Tooltip Text

Use the following properties of the target control to specify regular tooltip text and title:

API

Description

| | --- | --- | |

ToolTip

Specifies tooltip text. You can use line breaks in regular tooltips.

| |

AllowHtmlTextInToolTip

Specifies whether to parse HTML tags in text.

| |

ToolTipTitle

Specifies the tooltip title. If you do not specify tooltip text, the tooltip is not displayed even if you specify the title.

The following code snippet specifies tooltip text and title for a TextEdit editor:

C#
VB.NET

csharp

public Form1() {
  InitializeComponent();
  textEdit1.ShowToolTips = true;
  textEdit1.ToolTipTitle = "Name";
  textEdit1.ToolTip = "Please enter your name";
}

Public Sub New()
  InitializeComponent()
  textEdit1.ShowToolTips = True
  textEdit1.ToolTipTitle = "Name"
  textEdit1.ToolTip = "Please enter your name"
End Sub

Private Sub ToolTipController1_BeforeShow(ByVal sender As Object, ByVal e As ToolTipControllerShowEventArgs)
  Dim controller As ToolTipController = TryCast(sender, ToolTipController)
  If e.ToolTip = textEdit1.ToolTip Then
    e.ImageOptions.SvgImage = (TryCast(controller.ImageList, SvgImageCollection))("personalCard")
  End If
End Sub

Assign an Image to Regular Tooltips

Use the control’s ToolTipIconType property to assign a predefined icon. The ToolTipController.IconSize property specifies icon size.

Assign a custom image as follows:

Create a ToolTipController and assign it to the control’s ToolTipController property.
Create an image collection and assign it to the ToolTipController.ImageList property.
Handle the ToolTipController.BeforeShow event. Use the e.ImageOptions parameter to assign a raster or vector image to the tooltip.

Note

The ToolTipIconType property has priority over e.ImageOptions. If you assign a custom image, set ToolTipIconType to None.

The following code snippet assigns a custom image to the TextEdit tooltip:

Note

textEdit1, toolTipController1, and svgImageCollection1 were created at runtime.

C#
VB.NET

csharp

public Form1() {
  InitializeComponent();
  textEdit1.ShowToolTips = true;
  textEdit1.ToolTipTitle = "Name";
  textEdit1.ToolTip = "Please enter your name";
  textEdit1.ToolTipController = toolTipController1;
  toolTipController1.ImageList = svgImageCollection1;
  toolTipController1.BeforeShow += ToolTipController1_BeforeShow;
}

private void ToolTipController1_BeforeShow(object sender, ToolTipControllerShowEventArgs e) {
  ToolTipController controller = sender as ToolTipController;
  if (e.ToolTip == textEdit1.ToolTip)
    e.ImageOptions.SvgImage = (controller.ImageList as SvgImageCollection)["personalCard"];
}

Public Sub New()
  InitializeComponent()
  textEdit1.ShowToolTips = True
  textEdit1.ToolTipTitle = "Name"
  textEdit1.ToolTip = "Please enter your name"
  textEdit1.ToolTipController = toolTipController1
  toolTipController1.ImageList = svgImageCollection1
  AddHandler toolTipController1.BeforeShow, AddressOf ToolTipController1_BeforeShow
End Sub

Private Sub ToolTipController1_BeforeShow(ByVal sender As Object, ByVal e As ToolTipControllerShowEventArgs)
  Dim controller As ToolTipController = TryCast(sender, ToolTipController)
  If e.ToolTip = textEdit1.ToolTip Then
    e.ImageOptions.SvgImage = (TryCast(controller.ImageList, SvgImageCollection))("personalCard")
  End If
End Sub

Display a Super Tooltip

Use the control’s SuperTip property to assign a super tooltip. If you wish to use HTML tags in a super tooltip, enable the SuperToolTip.AllowHtmlText property.

Setting the ToolTipController.ToolTipType property to SuperTip converts existing regular tooltips to super tooltips.

Tip

Read the following help topic for information on how to customize super tooltips: Hints and Tooltips.

Example

This example illustrates how to use BarCodeControl to display a QR code.

C#
VB.NET

csharp

using DevExpress.XtraPrinting.BarCode;
using DevExpress.XtraEditors;

BarCodeControl barCodeControl1 = new BarCodeControl();
barCodeControl1.Parent = this;
barCodeControl1.Size = new System.Drawing.Size(150, 150);
barCodeControl1.AutoModule = true;
barCodeControl1.Text = "1234567890";
QRCodeGenerator symb = new QRCodeGenerator();
barCodeControl1.Symbology = symb;

// Adjust the QR barcode's specific properties.
symb.CompactionMode = QRCodeCompactionMode.AlphaNumeric;
symb.ErrorCorrectionLevel = QRCodeErrorCorrectionLevel.H;
symb.Version = QRCodeVersion.AutoVersion;

Imports DevExpress.XtraPrinting.BarCode
Imports DevExpress.XtraEditors

Dim barCodeControl1 As BarCodeControl = New BarCodeControl()
barCodeControl1.Parent = Me
barCodeControl1.Size = New System.Drawing.Size(150, 150)
barCodeControl1.AutoModule = True
barCodeControl1.Text = "1234567890"
Dim symb As QRCodeGenerator = New QRCodeGenerator()
barCodeControl1.Symbology = symb

' Adjust the QR barcode's specific properties.
symb.CompactionMode = QRCodeCompactionMode.AlphaNumeric
symb.ErrorCorrectionLevel = QRCodeErrorCorrectionLevel.H
symb.Version = QRCodeVersion.AutoVersion

Implements

IXtraResizableControl

Inheritance

Object MarshalByRefObject Component Control DevExpress.XtraEditors.XtraControl ControlBase BaseControl BaseStyleControl BarCodeControl