C#开发ActiveX控件及指纹采集

2022-08-04 17:11:58

最近做一个指纹采集和比对的功能，因为公司整个项目是WEB类型的，所以指纹采集的模块要嵌套在网页中，那只有用ActiveX了，以下是一些操作及效果，做个笔记！

新建用户控件，编写CS代码，如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.IO; 
using System.Reflection;


namespace FingerTool
{
    [Guid("5136CBA1-59B0-4A96-B2DC-64062A81F377")]
    public partial class FingerToolUC : UserControl,IObjectSafety
    {
        public FingerToolUC()
        {
            InitializeComponent();
        }
        FrmMain fm = null;
        public void ShowSettingForm()
        {
            if (fm == null) 
            {
                fm = new FrmMain();
            }
            
            fm.ShowDialog();
        }


        #region 调用JS接口

        [ComImport, Guid("00000118-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        public interface IOleClientSite
        {
            void SaveObject();

            void GetMoniker(uint dwAssign, uint dwWhichMoniker, object ppmk);

            void GetContainer(out IOleContainer ppContainer);

            void ShowObject();

            void OnShowWindow(bool fShow);

            void RequestNewObjectLayout();

        }

        [ComImport, Guid("0000011B-0000-0000-C000-000000000046"), InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
        public interface IOleContainer
        {

            void EnumObjects([In, MarshalAs(UnmanagedType.U4)] int grfFlags,

             [Out, MarshalAs(UnmanagedType.LPArray)] object[] ppenum);

            void ParseDisplayName([In, MarshalAs(UnmanagedType.Interface)] object pbc,

             [In, MarshalAs(UnmanagedType.BStr)] string pszDisplayName,

             [Out, MarshalAs(UnmanagedType.LPArray)] int[] pchEaten,

             [Out, MarshalAs(UnmanagedType.LPArray)] object[] ppmkOut);

            void LockContainer([In, MarshalAs(UnmanagedType.I4)] int fLock);

        }

        #endregion

        #region IE 安全接口
        private const string _IID_IDispatch = "{00020400-0000-0000-C000-000000000046}";
        private const string _IID_IDispatchEx = "{a6ef9860-c720-11d0-9337-00a0c90dcaa9}";
        private const string _IID_IPersistStorage = "{0000010A-0000-0000-C000-000000000046}";
        private const string _IID_IPersistStream = "{00000109-0000-0000-C000-000000000046}";
        private const string _IID_IPersistPropertyBag = "{37D84F60-42CB-11CE-8135-00AA004BB851}";

        private const int INTERFACESAFE_FOR_UNTRUSTED_CALLER = 0x00000001;
        private const int INTERFACESAFE_FOR_UNTRUSTED_DATA = 0x00000002;
        private const int S_OK = 0;
        private const int E_FAIL = unchecked((int)0x80004005);
        private const int E_NOINTERFACE = unchecked((int)0x80004002);

        private bool _fSafeForScripting = true;
        private bool _fSafeForInitializing = true;
        public int GetInterfaceSafetyOptions(ref Guid riid, ref int pdwSupportedOptions, ref int pdwEnabledOptions)
        {
            int Rslt = E_FAIL;
            string strGUID = riid.ToString("B");
            pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA;
            switch (strGUID)
            {
                case _IID_IDispatch:
                case _IID_IDispatchEx:
                    Rslt = S_OK;
                    pdwEnabledOptions = 0;
                    if (_fSafeForScripting == true)
                        pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER;
                    break;
                case _IID_IPersistStorage:
                case _IID_IPersistStream:
                case _IID_IPersistPropertyBag:
                    Rslt = S_OK;
                    pdwEnabledOptions = 0;
                    if (_fSafeForInitializing == true)
                        pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA;
                    break;
                default:
                    Rslt = E_NOINTERFACE;
                    break;
            }

            return Rslt;
        }

指纹采集关键代码：

private void axZKFPEngX1_OnImageReceived(object sender, AxZKFPEngXControl.IZKFPEngXEvents_OnImageReceivedEvent e)
        {
            if (!e.aImageValid) return;
            if (axZKFPEngX1.IsDisposed) return;
            try
            {
                if (pictureBox1.Image != null)
                {
                    pictureBox1.Image.Dispose();//释放文件资源
                    pictureBox1.Image = null;//清除图片
                }
                if (!System.IO.Directory.Exists(mvPath))
                {
                    System.IO.Directory.CreateDirectory(mvPath);
                }

                string FilePath = mvPath + "\\" + Guid.NewGuid().ToString() + ".bmp";

                axZKFPEngX1.SaveBitmap(FilePath);//保存新文件
                pictureBox1.Image = System.Drawing.Bitmap.FromFile(FilePath);//显示图片
                pictureBox1.Refresh();

                if (this.txtValue.Text.Trim() != "")
                {
                    SetMsg("", "Control");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

   private void axZKFPEngX1_OnFeatureInfo(object sender, AxZKFPEngXControl.IZKFPEngXEvents_OnFeatureInfoEvent e)
        {
            string sTemp = "";
            if (axZKFPEngX1.IsRegister)
            {
                sTemp = "登记状态：还需要按压：" + (axZKFPEngX1.EnrollIndex - 1).ToString() + "次指纹 ";
            }

            sTemp = sTemp + "指纹质量";

            if (e.aQuality != 0)
            {
                if (e.aQuality == 1)
                {
                    sTemp = sTemp + "特征点不够";
                }
                else
                {
                    sTemp = sTemp + "其它原因导致不能取到指纹特征";
                }
            }
            else
            {
                sTemp = sTemp + "合格";

            }
            this.lblMessage.Text = sTemp;
        }

指纹校验部分，最后保存起来的指纹是转换之后的BASE64字符串

string Value_Old="";//已经登记的指纹
string Value_Curr="";//当前的指纹

 bool IsOK = false;
            bool bRegChange = false;

            if (axZKFPEngX1.VerFingerFromStr(ref Value_Old, Value_Curr, false, ref bRegChange))
            {
                IsOK = true;
            }
            if (axZKFPEngX1.VerFingerFromStr(ref Value_Old2, Value_Curr, false, ref bRegChange))
            {
                IsOK = true;
            }

            if (IsOK)
            {
                MessageBox.Show("OK");
            }
            else
            {
                MessageBox.Show("NG");

            }

设置项目的COM属性