如何在C#中获取数字persona OnEnroll事件

Question

我正在使用Windows应用程序从VB迁移到C#；我正在使用数字人物指纹扫描器来捕获员工指纹，它工作得很好，但我无法在C#中获取OnEnroll事件-这是我在VB上做的。

这是我的VB代码

Private allReaderSerial As String = "00000000-0000-0000-0000-000000000000"
Private WithEvents enrollControl As DPFP.Gui.Enrollment.EnrollmentControl

Private Sub CreateDPControl(ByRef control As DPFP.Gui.Enrollment.EnrollmentControl)
    Try
        control = New DPFP.Gui.Enrollment.EnrollmentControl()
        control.AutoSizeMode = Windows.Forms.AutoSizeMode.GrowAndShrink
        control.MaxEnrollFingerCount = 1
        control.Name = "enrollControl"
        control.Location = New System.Drawing.Point(0, 0)
        control.ReaderSerialNumber = "00000000-0000-0000-0000-000000000000"
        control.Visible = True
        control.Enabled = True
        Me.Controls.Add(control)
    Catch ex As Exception
        MessageBox.Show("exception", MsgTitle, MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
    End Try
End Sub

Private Sub frmBioCapture_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    If enrollControl Is Nothing Then
        CreateDPControl(enrollControl)
    End If
End Sub

Private WithEvents enrollControl As DPFP.Gui.Enrollment.EnrollmentControl
Private Sub enrollControl_OnEnroll(ByVal Control As Object, ByVal FingerMask As Integer, ByVal temp As DPFP.Template, ByRef EventHandlerStatus As DPFP.Gui.EventHandlerStatus) Handles enrollControl.OnEnroll
    staffTemplate = temp
    Me.Hide()
End Sub

Private Sub enrollControl_OnReaderDisconnect(Control As Object, ReaderSerialNumber As String, Finger As Integer) Handles enrollControl.OnReaderDisconnect
    MsgBox("Fingerprint reader is not conneted. Connect fingerprint reader.", vbExclamation, MsgTitle)
    Exit Sub
End Sub

上面的代码运行良好，我可以使用以下命令获取OnEnroll事件

Handles enrollControl.OnEnroll

我想在C#中实现同样的任务--以下是我到目前为止编写的代码：

private string allReaderSerialize = "00000000-0000-0000-0000-000000000000";
private DPFP.Gui.Enrollment.EnrollmentControl enrollControl;
private DPFP.Template template;

public FrmCapture()
{
    InitializeComponent();
}

private void CreateDPControl(DPFP.Gui.Enrollment.EnrollmentControl control)
{
    try
    {
        control = new DPFP.Gui.Enrollment.EnrollmentControl
            {
                AutoSizeMode = AutoSizeMode.GrowAndShrink,
                MaxEnrollFingerCount = 2,
                Name = "enrollControl",
                BackgroundImage = Properties.Resources.FormBackground,
                BackgroundImageLayout = ImageLayout.Stretch,
                Location = new Point(0, 0),
                ReaderSerialNumber = "00000000-0000-0000-0000-000000000000",
                Visible = true,
                Enabled = true
            };

        this.Controls.Add(control);
    }
    catch (Exception)
    {
        throw;
    }
}

private void FrmCapture_Load(object sender, EventArgs e)
{
    this.Location = new Point(400, 180);

    if (enrollControl == null)
    {
        CreateDPControl(enrollControl);
    }
}

private void EnrolControl_OnReaderDisconnected(object control, string ReaderSerialNumber, int finger)
{
    MessageBox.Show("Fingerprint reader is not connected. Connect fingerprint reader.");
    return;
}

private void EnrollControl_OnEnroll(object control, int fingerMask, DPFP.Template temp, DPFP.Gui.EventHandlerStatus eventHandlerStatus)
{
    template = temp;
}

使用完成的捕获是有效的，但是我不能获得OnEnroll事件(“捕获完成”)。

提前谢谢。

Answer 1

在将其添加到Controls集合之前，您可以像这样附加处理程序。

 control.OnReaderDisconnect += EnrolControl_OnReaderDisconnected;

C#使用+=操作符将处理程序绑定到事件，并使用-=将其解除挂钩。