這個事情就是一個坑,耽誤了兩周時間,之前並沒有做過ActiveX這玩意,現在客戶需求如此,只能說是在網上看著教程做了。 事情是這樣的,有一臺海康威視的攝像頭,客戶需要一個ActiveX控制項嵌入到網頁中,通過點擊按鈕開始錄製和結束錄製來進行視頻的錄製和保存,關於海康攝像頭的二次開發在此就不多說了,可以 ...
這個事情就是一個坑,耽誤了兩周時間,之前並沒有做過ActiveX這玩意,現在客戶需求如此,只能說是在網上看著教程做了。
事情是這樣的,有一臺海康威視的攝像頭,客戶需要一個ActiveX控制項嵌入到網頁中,通過點擊按鈕開始錄製和結束錄製來進行視頻的錄製和保存,關於海康攝像頭的二次開發在此就不多說了,可以參考SDK中的說明。
直接上流程:
1.開發環境:
VS2010,這個打包方便,之前用VS2013打包的,總是調用不了,不知道原因是什麼;SDK是32位的,用64位的在Winform中可以正常使用,在網頁中使用控制項時會報錯。
2.新建項目:
新建一個類庫項目,如下:
右鍵點擊項目,添加“用戶控制項”,如下:
界面拖控制項,如下:
控制項代碼如下,其中Guid是“工具”->“創建GUID”自動生成的,#region->#endregion摺疊部分是實現的IObjectSafety介面
using System; namespace VideoHelper { [System.Security.SecuritySafeCritical] public class Videos { private bool m_initSDK = false; /// <summary> /// 正在錄製 /// </summary> private bool m_Record = false; private uint LastErr = 0; private Int32 m_RealHandle = -1; private Int32 m_lUserID = -1; public IntPtr handle { get; set; } public bool Initialize(string ip = "192.168.1.64", int port = 8000, string username = "admin", string password = "8910jqk#") { try { m_initSDK = CHCNetSDK.NET_DVR_Init(); if (m_initSDK) { CHCNetSDK.NET_DVR_SetLogToFile(3, "C:\\SdkLog\\", true); //設備參數結構體 CHCNetSDK.NET_DVR_DEVICEINFO_V30 DeviceInfo = new CHCNetSDK.NET_DVR_DEVICEINFO_V30(); //註冊設備 m_lUserID = CHCNetSDK.NET_DVR_Login_V30(ip, port, username, password, ref DeviceInfo); return m_lUserID >= 0; } return false; } catch (Exception ex) { System.Windows.Forms.MessageBox.Show("Initialize:" + ex.Message); return false; } } public bool Start(IntPtr handle, string filename) { try { CHCNetSDK.NET_DVR_PREVIEWINFO lpPreviewInfo = new CHCNetSDK.NET_DVR_PREVIEWINFO(); lpPreviewInfo.lChannel = 1; lpPreviewInfo.dwLinkMode = 0; lpPreviewInfo.dwStreamType = 0; lpPreviewInfo.bBlocked = true; lpPreviewInfo.dwDisplayBufNum = 15; lpPreviewInfo.hPlayWnd = handle; IntPtr pUser = IntPtr.Zero;//new IntPtr(); //獲取實時視頻流 m_RealHandle = CHCNetSDK.NET_DVR_RealPlay_V40(m_lUserID, ref lpPreviewInfo, null, pUser); if (m_Record == false) { CHCNetSDK.NET_DVR_MakeKeyFrame(m_lUserID, 1); if (!CHCNetSDK.NET_DVR_SaveRealData(m_RealHandle, filename)) { LastErr = CHCNetSDK.NET_DVR_GetLastError(); return false; } else { m_Record = true; return true; } } else { return false; } } catch { return false; } } public bool End() { if (m_Record) { if (!CHCNetSDK.NET_DVR_StopSaveRealData(m_RealHandle)) { LastErr = CHCNetSDK.NET_DVR_GetLastError(); return false; } m_Record = false; m_RealHandle = -1; return true; } else { return false; } } public void Dispose() { try { if (m_lUserID >= 0) { CHCNetSDK.NET_DVR_Logout_V30(m_lUserID); m_lUserID = -1; } if (m_RealHandle >= 0) { CHCNetSDK.NET_DVR_StopRealPlay(m_RealHandle); m_RealHandle = -1; } CHCNetSDK.NET_DVR_Cleanup(); } catch { } } } }錄製視頻操作類
using System; using System.Runtime.InteropServices; namespace VideoHelper { [ComImport, GuidAttribute("CB5BDC81-93C1-11CF-8F20-00805F2CD064")] [InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)] public interface IObjectSafety { [PreserveSig] int GetInterfaceSafetyOptions(ref Guid riid, [MarshalAs(UnmanagedType.U4)] ref int pdwSupportedOptions, [MarshalAs(UnmanagedType.U4)] ref int pdwEnabledOptions); [PreserveSig()] int SetInterfaceSafetyOptions(ref Guid riid, [MarshalAs(UnmanagedType.U4)] int dwOptionSetMask, [MarshalAs(UnmanagedType.U4)] int dwEnabledOptions); } }介面代碼
using System; using System.Windows.Forms; using System.IO; using System.Runtime.InteropServices; namespace VideoHelper { [System.Security.SecuritySafeCritical] [Guid("79629620-3C0C-4D47-B93B-2D36AEF8EF31")] public partial class VideoControl : UserControl,IObjectSafety { public VideoControl() { InitializeComponent(); } string videopath = Environment.CurrentDirectory; Videos video; IntPtr handle; private void btnLogin_Click(object sender, EventArgs e) { if (btnLogin.Text == "登錄") { try { if (string.IsNullOrWhiteSpace(this.txtIP.Text)) { MessageBox.Show("IP地址不能為空!"); return; } if (string.IsNullOrWhiteSpace(this.txtUserID.Text)) { MessageBox.Show("用戶名不能為空!"); return; } if (string.IsNullOrWhiteSpace(this.txtPwd.Text)) { MessageBox.Show("密碼不能為空!"); return; } video = new Videos(); if (video.Initialize(this.txtIP.Text, Convert.ToInt32(this.numericUpDown1.Value), this.txtUserID.Text, this.txtPwd.Text)) { this.btnLogin.Text = "註銷"; MessageBox.Show("登錄成功!"); this.btnStart.Enabled = true; this.btnSave.Enabled = true; } else { MessageBox.Show("登錄失敗!"); } } catch (Exception ee) { MessageBox.Show("登錄異常:" + ee.Message); } } else if (btnLogin.Text == "註銷") { try { video.Dispose(); this.btnLogin.Text = "登錄"; this.btnStart.Enabled = false; this.btnSave.Enabled = false; } catch (Exception ee) { MessageBox.Show("註銷異常:" + ee.Message); } } } private void btnStart_Click(object sender, EventArgs e) { try { string filename = txtFile.Text.Trim(); if (filename.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0 || string.IsNullOrWhiteSpace(filename)) { MessageBox.Show("文件名含有非法字元或空格,請重新輸入"); txtFile.Focus(); return; } video.Start(handle, filename + comboBox1.SelectedItem.ToString()); this.btnStart.Enabled = false; this.btnSave.Enabled = true; } catch (Exception ee) { MessageBox.Show("異常:" + ee.Message); } } private void btnSave_Click(object sender, EventArgs e) { try { if (video.End()) { MessageBox.Show("視頻已保存!"); this.btnStart.Enabled = true; this.btnSave.Enabled = false; } else { MessageBox.Show("保存失敗!"); this.btnStart.Enabled = true; this.btnSave.Enabled = true; } } catch (Exception ee) { MessageBox.Show("異常:" + ee.Message); } } private void button1_Click(object sender, EventArgs e) { try { System.Diagnostics.Process.Start(videopath); } catch { } } private void VideoControl_Load(object sender, EventArgs e) { this.comboBox1.SelectedItem = ".mp4"; this.handle = pictureBox1.Handle; this.btnStart.Enabled = false; this.btnSave.Enabled = false; } #region IObjectSafety 成員 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; } public int SetInterfaceSafetyOptions(ref Guid riid, int dwOptionSetMask, int dwEnabledOptions) { int Rslt = E_FAIL; string strGUID = riid.ToString("B"); switch (strGUID) { case _IID_IDispatch: case _IID_IDispatchEx: if (((dwEnabledOptions & dwOptionSetMask) == INTERFACESAFE_FOR_UNTRUSTED_CALLER) && (_fSafeForScripting == true)) Rslt = S_OK; break; case _IID_IPersistStorage: case _IID_IPersistStream: case _IID_IPersistPropertyBag: if (((dwEnabledOptions & dwOptionSetMask) == INTERFACESAFE_FOR_UNTRUSTED_DATA) && (_fSafeForInitializing == true)) Rslt = S_OK; break; default: Rslt = E_NOINTERFACE; break; } return Rslt; } #endregion } }控制項代碼
namespace VideoHelper { partial class VideoControl { /// <summary> /// 必需的設計器變數。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的資源。 /// </summary> /// <param name="disposing">如果應釋放托管資源,為 true;否則為 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region 組件設計器生成的代碼 /// <summary> /// 設計器支持所需的方法 - 不要 /// 使用代碼編輯器修改此方法的內容。 /// </summary> private void InitializeComponent() { this.button1 = new System.Windows.Forms.Button(); this.comboBox1 = new System.Windows.Forms.ComboBox(); this.label4 = new System.Windows.Forms.Label(); this.txtFile = new System.Windows.Forms.TextBox(); this.btnSave = new System.Windows.Forms.Button(); this.btnStart = new System.Windows.Forms.Button(); this.btnLogin = new System.Windows.Forms.Button(); this.label3 = new System.Windows.Forms.Label(); this.txtPwd = new System.Windows.Forms.TextBox(); this.label2 = new System.Windows.Forms.Label(); this.txtUserID = new System.Windows.Forms.TextBox(); this.label1 = new System.Windows.Forms.Label(); this.numericUpDown1 = new System.Windows.Forms.NumericUpDown(); this.IP = new System.Windows.Forms.Label(); this.txtIP = new System.Windows.Forms.TextBox(); this.pictureBox1 = new System.Windows.Forms.PictureBox(); ((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit(); this.SuspendLayout(); // // button1 // this.button1.Cursor = System.Windows.Forms.Cursors.Hand; this.button1.Font = new System.Drawing.Font("微軟雅黑", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.button1.Location = new System.Drawing.Point(377, 360); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(138, 22); this.button1.TabIndex = 58; this.button1.Text = "打開視頻存放位置"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // comboBox1 // this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList; this.comboBox1.FlatStyle = System.Windows.Forms.FlatStyle.Flat; this.comboBox1.Font = new System.Drawing.Font("微軟雅黑", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.comboBox1.FormattingEnabled = true; this.comboBox1.Items.AddRange(new object[] { ".mp4", ".avi", ".wmv", ".3gp", ".flv"}); this.comboBox1.Location = new System.Drawing.Point(303, 361); this.comboBox1.Name = "comboBox1"; this.comboBox1.Size = new System.Drawing.Size(55, 25); this.comboBox1.TabIndex = 57; // // label4 // this.label4.AutoSize = true; this.label4.Font = new System.Drawing.Font("微軟雅黑", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.label4.Location = new System.Drawing.Point(14, 360); this.label4.Name = "label4"; this.label4.Size = new System.Drawing.Size(116, 17); this.label4.TabIndex = 56; this.label4.Text = "請輸入視頻文件名:"; // // txtFile // this.txtFile.Location = new System.Drawing.Point(136, 360); this.txtFile.Name = "txtFile"; this.txtFile.Size = new System.Drawing.Size(161, 21); this.txtFile.TabIndex = 55; // // btnSave // this.btnSave.Cursor = System.Windows.Forms.Cursors.Hand; this.btnSave.Font = new System.Drawing.Font("微軟雅黑", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btnSave.Location = new System.Drawing.Point(490, 298); this.btnSave.Name = "btnSave"; this.btnSave.Size = new System.Drawing.Size(57, 45); this.btnSave.TabIndex = 54; this.btnSave.Text = "保存"; this.btnSave.UseVisualStyleBackColor = true; this.btnSave.Click += new System.EventHandler(this.btnSave_Click); // // btnStart // this.btnStart.Cursor = System.Windows.Forms.Cursors.Hand; this.btnStart.Font = new System.Drawing.Font("微軟雅黑", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btnStart.Location = new System.Drawing.Point(421, 298); this.btnStart.Name = "btnStart"; this.btnStart.Size = new System.Drawing.Size(57, 45); this.btnStart.TabIndex = 53; this.btnStart.Text = "錄製"; this.btnStart.UseVisualStyleBackColor = true; this.btnStart.Click += new System.EventHandler(this.btnStart_Click); // // btnLogin // this.btnLogin.Cursor = System.Windows.Forms.Cursors.Hand; this.btnLogin.Font = new System.Drawing.Font("微軟雅黑", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.btnLogin.Location = new System.Drawing.Point(352, 298); this.btnLogin.Name = "btnLogin"; this.btnLogin.Size = new System.Drawing.Size(57, 45); this.btnLogin.TabIndex = 52; this.btnLogin.Text = "登錄"; this.btnLogin.UseVisualStyleBackColor = true; this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click); // // label3 // this.label3.AutoSize = true; this.label3.Font = new System.Drawing.Font("微軟雅黑", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.label3.Location = new System.Drawing.Point(172, 325); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(44, 17); this.label3.TabIndex = 51; this.label3.Text = "密碼:"; // // txtPwd // this.txtPwd.Location = new System.Drawing.Point(221, 322); this.txtPwd.Name = "txtPwd"; this.txtPwd.PasswordChar = '*'; this.txtPwd.Size = new System.Drawing.Size(115, 21); this.txtPwd.TabIndex = 50; this.txtPwd.Text = "8910jqk#"; this.txtPwd.UseSystemPasswordChar = true; // // label2 // this.label2.AutoSize = true; this.label2.Font = new System.Drawing.Font("微軟雅黑", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.label2.Location = new System.Drawing.Point(8, 322); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(44, 17); this.label2.TabIndex = 49; this.label2.Text = "用戶名"; // // txtUserID // this.txtUserID.Location = new System.Drawing.Point(66, 322); this.txtUserID.Name = "txtUserID"; this.txtUserID.Size = new System.Drawing.Size(100, 21); this.txtUserID.TabIndex = 48; this.txtUserID.Text = "admin"; // // label1 // this.label1.AutoSize = true; this.label1.Font = new System.Drawing.Font("微軟雅黑"<