Class SfQRCodeGenerator

Specifies all the properties for the QRCode to be rendered.

Inheritance
System.Object
SfBaseComponent
SfQRCodeGenerator
Inherited Members
Namespace: Syncfusion.Blazor.BarcodeGenerator
Assembly: Syncfusion.Blazor.dll
Syntax
public class SfQRCodeGenerator : SfBaseComponent
Examples
<SfQRCodeGenerator Width="200" Height="200" Version="QRCodeVersion.Version40" Value="65213323"  BackgroundColor="white" ForeColor="black" OnValidationFailed="@OnInvalid">
 <QRCodeGeneratorDisplayText Text = "" Font="monospace" Size="25" Alignment="Alignment.Left" Position="TextPosition.Top">
    <QRCodeTextMargin Left = "0" Top="0" Right="0" Bottom="0"></QRCodeTextMargin>
 </QRCodeGeneratorDisplayText>
 <QRMargin Left = "10" Top="10" Right="10" Bottom="10"></QRMargin>
</SfQRCodeGenerator>
@code{
 public void OnInvalid(ValidationFailedEventArgs args)
 {
 }
}

Constructors

SfQRCodeGenerator()

Declaration
public SfQRCodeGenerator()

Properties

BackgroundColor

Specifies the background color of the QRCode. By default, it is set to white.

Declaration
public string BackgroundColor { get; set; }
Property Value
Type Description
System.String

Accepts the string value representing a CSS color code for the background color of qr code. The default value is white.

ChildContent

Sets content for QRCode generator element including HTML support and its customizations.

Declaration
public RenderFragment ChildContent { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.RenderFragment

Accepts a RenderFragment that defines the content of the UI element.

DisplayText

Specifies the text properties for the QRCode.

Declaration
public QRCodeGeneratorDisplayText DisplayText { get; set; }
Property Value
Type Description
QRCodeGeneratorDisplayText

Displays a customized text of QR code.

ErrorCorrectionLevel

Specifies the error correction level of the QR code.

Declaration
public ErrorCorrectionLevel ErrorCorrectionLevel { get; set; }
Property Value
Type Description
ErrorCorrectionLevel

Displays the error correction level. The default error correction level is low.

ForeColor

Specifies the line and text color of the QRCode. By default, it is set to black.

Declaration
public string ForeColor { get; set; }
Property Value
Type Description
System.String

Accepts the string value. The default value is black.

Height

Specifies the height of the QRCode model. By default, it is set to 100%.

Declaration
public string Height { get; set; }
Property Value
Type Description
System.String

Accepts the string value. The default value is 100%.

Gets or sets the logo image that will be displayed in the center of the QR code.

Declaration
public QRCodeLogo Logo { get; set; }
Property Value
Type
QRCodeLogo
Examples

The following example demonstrates how to set a logo for the QR code in Razor syntax:

<SfQRCodeGenerator Width="150px" Height="150px" Value="Syncfusion">
    <QRCodeLogo Width="50" Height="50" ImageSource="images/syncfusion.png"></QRCodeLogo>
</SfQRCodeGenerator>

Margin

Specifies the margin properties for the QRCode. By default, it is set to 10 from all sides.

Declaration
public QRMargin Margin { get; set; }
Property Value
Type Description
QRMargin

The margin of qr matrix code, represented as a QRMargin object. The default value of all side is 10.

OnValidationFailed

Triggers when the QRCode input is an invalid string.

Declaration
public EventCallback<ValidationFailedEventArgs> OnValidationFailed { get; set; }
Property Value
Type
Microsoft.AspNetCore.Components.EventCallback<ValidationFailedEventArgs>

Value

Specifies the value of the QRCode to be rendered.

Declaration
public string Value { get; set; }
Property Value
Type Description
System.String

Accepts the string value.

Version

Specifies the version of the QR code.

Declaration
public QRCodeVersion Version { get; set; }
Property Value
Type Description
QRCodeVersion

The QR code version can be set to one of the following values between 1 to 40.

Width

Specifies the width of the QRCode model. By default, it is set to 100%.

Declaration
public string Width { get; set; }
Property Value
Type Description
System.String

Accepts the string value. The default value is 100%.

XDimension

Represents the width of the smallest element.

Declaration
public double XDimension { get; set; }
Property Value
Type Description
System.Double

The width of the smallest element in the qr matrix.

Methods

BuildRenderTree(RenderTreeBuilder)

Declaration
protected override void BuildRenderTree(RenderTreeBuilder __builder)
Parameters
Type Name Description
Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder

Export(String, BarcodeExportType)

Export the barcode as an image in the specified image type and downloads it in the browser.

Declaration
public void Export(string fileName, BarcodeExportType exportType)
Parameters
Type Name Description
System.String fileName

Specifies the filename of the barcode image to be download.
BarcodeExportType exportType

Specifies the type used to export the barcode.

ExportAsBase64Image(BarcodeExportType)

Export the barcode as an image in the specified image type and returns it as base64 string.

Declaration
public Task<string> ExportAsBase64Image(BarcodeExportType exportType)
Parameters
Type Name Description
BarcodeExportType exportType
Returns
Type Description
System.Threading.Tasks.Task<System.String>

Returns the base64 string value.

OnAfterRenderAsync(Boolean)

The OnAfterRenderAsync method is invoked after the SfQRCodeGenerator component has finished rendering.

Declaration
protected override Task OnAfterRenderAsync(bool firstRender)
Parameters
Type Name Description
System.Boolean firstRender

The first time the component instance is rendered is set to true.
Returns
Type
System.Threading.Tasks.Task
Overrides

OnInitializedAsync()

OnInitializedAsync is invoked when the SfQRCodeGenerator component is initialized.

Declaration
protected override Task OnInitializedAsync()
Returns
Type
System.Threading.Tasks.Task
Overrides

OnParametersSetAsync()

Sets the parameters for the SfQRCodeGenerator component in the render tree.

Declaration
protected override Task OnParametersSetAsync()
Returns
Type
System.Threading.Tasks.Task