实际问题：Mainform 读取例程两次以上。MainForm 中的所有组件和对象都为空示例：
按钮首次运行优秀
添加我的代码：
namespace CheckNet
{
/// <summary>
/// Description of MainForm.
/// </summary>
delegate void Function();
public partial class MainForm : Form
{
public MainForm()
{
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
Btn_Inicio.Click += new EventHandler (Btn_InicioClick);
// VerificationForm += new EventHandler (VerificationForm);
//
// TODO: Add constructor code after the InitializeComponent() call.
//
}
private DPFP.Template Template;
private DPFP.Template myTemplate;
//
void Btn_InicioClick(object sender, EventArgs e)
{
// call rutine ejecutar boton primera vez
//
if (this.panelContenedor.Controls.Count > 0)
this.panelContenedor.Controls.RemoveAt(0);
VerificationForm hijos = new VerificationForm();
hijos.TopLevel = false;
hijos.FormBorderStyle = FormBorderStyle.None;
hijos.Dock = DockStyle.Fill;
this.panelContenedor.Controls.Add(hijos);
this.panelContenedor.Tag = hijos;
hijos.Show();
}
void Button7Click(object sender, EventArgs e)
{
AddFormInPanel(new Hijo2());
}
private void AddFormInPanel(object formHijo)
{
if (this.panelContenedor.Controls.Count > 0)
this.panelContenedor.Controls.RemoveAt(0);
Form fh = formHijo as Form;
fh.TopLevel = false;
fh.FormBorderStyle = FormBorderStyle.None;
fh.Dock = DockStyle.Fill;
this.panelContenedor.Controls.Add(fh);
this.panelContenedor.Tag = fh;
fh.Show();
}
void Close_bottonClick(object sender, EventArgs e)
{
Close();
}
}
}
////////// 调用表单验证表单
namespace CheckNet
{
/* NOTE: This form is inherited from the CaptureForm,
so the VisualStudio Form Designer may not load it properly
(at least until you build the project).
If you want to make changes in the form layout - do it in the base CaptureForm.
All changes in the CaptureForm will be reflected in all derived forms
(i.e. in the EnrollmentForm and in the VerificationForm)
*/
public class VerificationForm : CaptureForm
{
public void Verify(DPFP.Template template)
{
Template = template;
ShowDialog();
}
protected override void Init()
{
base.Init();
base.Text = "Fingerprint Verification ";
Verificator = new DPFP.Verification.Verification(); // Create a fingerprint template verificator
UpdateStatus(0);
}
protected override void Process(DPFP.Sample Sample)
{
base.Process(Sample);
// Process the sample and create a feature set for the enrollment purpose.
DPFP.FeatureSet features = ExtractFeatures(Sample, DPFP.Processing.DataPurpose.Verification);
// Check quality of the sample and start verification if it's good
// TODO: move to a separate task
template= TomarHuellaBd();
Template=template;
if (features != null)
{
// Compare the feature set with our template
DPFP.Verification.Verification.Result result = new DPFP.Verification.Verification.Result();
Verificator.Verify(features, Template, ref result);
UpdateStatus(result.FARAchieved);
if (result.Verified)
{
MakeReport2(" ");
}
else
MakeReport("Huella no Identificado.");
}
}
private void UpdateStatus(int FAR)
{
// Show "False accept rate" value
SetStatus(String.Format("False Accept Rate (FAR) = {0}", FAR));
}
private DPFP.Template TomarHuellaBd()
{
// Verifica la Huella desde una base de Datos
bool Bandera=true;
try { // Validar Numero
int idEmpleado =int.Parse(Global_ip.Globalip.ToString());
} catch {
MessageBox.Show("Error Numero de Empleado ", Global_ip.Globalip.ToString());
Bandera=false;
//
return null;
//
}
try
{
int NumEmpleado=int.Parse(Global_ip.Globalip.ToString());
enlacedb db = new enlacedb();
FbConnection conexion2 = new FbConnection(db.connectionString);
conexion2.Open();
FbCommand Frda = new FbCommand("SELECT * FROM REGHUMAN WHERE ID_EMPLEADO=@ID_EMPLEADO", conexion2);
Frda.Parameters.Add("@ID_EMPLEADO",SqlDbType.VarChar).Value = NumEmpleado;
FbDataReader leerF = Frda.ExecuteReader();
bool fseek= leerF.Read();
if (fseek) {
Global_Nombre.GlobalNombre= leerF.GetValue(4).ToString();
Byte[] imageF = new Byte[Convert.ToInt32 ((leerF.GetBytes(2, 0,null, 0, Int32.MaxValue)))];
leerF.GetBytes(2, 0, imageF, 0, imageF.Length);
MemoryStream memfpt = new MemoryStream(imageF);
DPFP.Template template = new DPFP.Template(memfpt);
return template;
}
else
{
return null;
}
}
catch (Exception err2) {
MessageBox.Show(err2.ToString());
}
return null;
}
private DPFP.Template Template;
private DPFP.Template template;
private DPFP.Verification.Verification Verificator;
}
}
如果用户请求第二次运行同一个按钮
VerificationForm 例程和居民是 CaptureForm Digital Persona 设备，无法读取指纹
如何清空或重置程序或例程（MainForm、VerificationForm 和 CaptureForm）谢谢。