/// <summary>
/// 验证Token令牌是否合法
/// </summary>
/// <param name="token">令牌</param>
/// <param name="appid">应用ID</param>
/// <returns>CheckResult</returns>
protected virtual OperatedResult <string> CheckIdentityToken(string token, Guid appid)
{
#region 请求参数检查
var checkResult = CheckRequest(token, appid);
if (!checkResult.State)
{
return(OperatedResult <string> .Fail(checkResult.Message));
}
#endregion
#region 请求通道检查
var getAppConfig = AppCfgService.Get(appid);
if (!getAppConfig.State)
{
return(OperatedResult <string> .Fail(getAppConfig.Message));
}
var appConfig = getAppConfig.Data;
#endregion
return(ApiAuthenticate.CheckIdentityToken(token, appConfig));
}
/// <summary>
/// 通用图片上传类
/// </summary>
/// <param name="postedFile">HttpPostedFile控件</param>
/// <param name="savePath">保存路径</param>
/// <returns>返回上传信息</returns>
public OperatedResult <UploadImageInfo> FileSaveAs(HttpPostedFile postedFile, string savePath)
{
try
{
OperatedResult <UploadImageInfo> _uploadImageInfo = GetUploadImageInfo(postedFile, savePath);
if (_uploadImageInfo.State)
{
string _fullPath = _uploadImageInfo.Data.FilePath,
_fileEx = _uploadImageInfo.Data.FileEx,
_fileName = _uploadImageInfo.Data.FileName;
int _sourceWidth = _uploadImageInfo.Data.SourceWidth,
_sourceHeight = _uploadImageInfo.Data.SourceHeight;
HanlderImageSourceWidthOverMax(savePath, _sourceWidth, _sourceHeight, _fileEx, _fullPath);
HanlderImageZip(_fullPath, _fileEx);
HanlderThumbnailImage(_fullPath, savePath, _fileName, _fileEx, _sourceWidth, _sourceHeight, _uploadImageInfo.Data);
HanlderSetPicWater(_fullPath, _uploadImageInfo.Data);
HanlderSetTextWater(_fullPath, _uploadImageInfo.Data);
return(OperatedResult <UploadImageInfo> .Success(_uploadImageInfo.Data));
}
return(_uploadImageInfo);
}
catch (Exception ex)
{
return(OperatedResult <UploadImageInfo> .Fail(ex.Message));
}
}
public override void OnParameterInvaliding(HttpActionContext actionContext, ValidationFailedResult result)
{
var message = result.Data.FirstOrDefault()?.Message;
actionContext.Response =
actionContext.Request.CreateResponse(HttpStatusCode.BadRequest, OperatedResult <string> .Fail(message));
}
/// <summary>
/// 视频截图，默认BMP格式
/// </summary>
/// <param name="saveImageFilePath">图片格式存储全路径;eg:D:\20170913162510.jpeg</param>
/// <param name="imageType">图片格式</param>
/// <returns>操作结果</returns>
public OperatedResult Capture(string saveImageFilePath, CaptureImageType imageType = CaptureImageType.BMP)
{
if (!IsPreviewing)
{
return(OperatedResult.Fail("尚未处于视频预览状态，不能进行视频截图操作."));
}
string _captureImageFile = string.IsNullOrEmpty(saveImageFilePath) != true ? saveImageFilePath : string.Format(@"{0}\{1}.{2}", CaptureFolders, DateTime.Now.ToString("yyyyMMddHHmmss"), imageType.ToString().ToLower());
bool _result = false;
switch (imageType)
{
case CaptureImageType.BMP:
_result = CHCNetSDK.NET_DVR_CapturePicture(previewId, _captureImageFile);
break;
case CaptureImageType.JPEG:
CHCNetSDK.NET_DVR_JPEGPARA _jpegParamter = new CHCNetSDK.NET_DVR_JPEGPARA();
_jpegParamter.wPicQuality = 0; //图像质量 Image quality
_jpegParamter.wPicSize = 0xff; //抓图分辨率 Picture size: 2- 4CIF，0xff- Auto(使用当前码流分辨率)，抓图分辨率需要设备支持，更多取值请参考SDK文档
_result = CHCNetSDK.NET_DVR_CaptureJPEGPicture(UserId, CurPreviewChannelNo, ref _jpegParamter, _captureImageFile);
break;
}
return(_result == true?OperatedResult.Success(_captureImageFile) : OperatedResult.Fail(LastErrorMessage));
}
/// <summary>
/// 创建合法用户的Token
/// </summary>
/// <param name="userId">用户Id</param>
/// <param name="passWord">用户密码</param>
/// <param name="signature">加密签名字符串</param>
/// <param name="timestamp">时间戳</param>
/// <param name="nonce">随机数</param>
/// <param name="appid">应用接入ID</param>
/// <returns>OperatedResult</returns>
protected virtual OperatedResult <IdentityToken> CreateIdentityToken(string userId, string passWord,
string signature, string timestamp,
string nonce, Guid appid)
{
#region 参数检查
var checkResult = CheckRequest(userId, passWord, signature, timestamp, nonce, appid);
if (!checkResult.State)
{
return(OperatedResult <IdentityToken> .Fail(checkResult.Message));
}
#endregion
#region 用户鉴权
var getIdentityUser = GetIdentityUser(userId, passWord);
if (!getIdentityUser.State)
{
return(OperatedResult <IdentityToken> .Fail(getIdentityUser.Message));
}
#endregion
#region 请求通道检查
var getAppConfig = AppCfgService.Get(appid);
if (!getAppConfig.State)
{
return(OperatedResult <IdentityToken> .Fail(getAppConfig.Message));
}
var appConfig = getAppConfig.Data;
#endregion
#region 检查请求签名检查
var checkSignatureResult = ApiAuthorize.CheckRequestSignature(signature, timestamp, nonce, appConfig);
if (!checkSignatureResult.State)
{
return(OperatedResult <IdentityToken> .Fail(checkSignatureResult.Message));
}
#endregion
#region 生成基于Jwt Token
var getTokenResult = ApiAuthorize.CreateIdentityToken(getIdentityUser.Data, getAppConfig.Data);
if (!getTokenResult.State)
{
return(OperatedResult <IdentityToken> .Fail(getTokenResult.Message));
}
return(OperatedResult <IdentityToken> .Success(getTokenResult.Data));
#endregion
}
public OperatedResult <string> CheckIdentityToken(string token, AppConfig appConfig)
{
ValidateOperator.Begin()
.NotNullOrEmpty(token, "Token")
.NotNull(appConfig, "AppConfig");
try
{
var tokenText = ParseTokens(token, appConfig.SharedKey);
if (string.IsNullOrEmpty(tokenText))
{
return(OperatedResult <string> .Fail("用户令牌Token为空"));
}
dynamic root = JObject.Parse(tokenText);
string userid = root.iss;
var iat = root.iat;
var validTokenExpired =
new TimeSpan((int)(UnixEpochHelper.GetCurrentUnixTimestamp().TotalSeconds - iat))
.TotalDays > appConfig.TokenExpiredDay;
return(validTokenExpired
? OperatedResult <string> .Fail($"用户ID{userid}令牌失效")
: OperatedResult <string> .Success(userid));
}
catch (FormatException)
{
return(OperatedResult <string> .Fail("用户令牌非法"));
}
catch (SignatureVerificationException)
{
return(OperatedResult <string> .Fail("用户令牌非法"));
}
}
public void JsonDeserializeTest()
{
Person _personA = new Person()
{
Name = "YanZhiweiA",
Age = 10,
Address = "shanghaiA"
};
Person _personB = new Person()
{
Name = "YanZhiweiB",
Age = 11,
Address = "shanghaiB"
};
List <Person> _expected = new List <Person>();
_expected.Add(_personA);
_expected.Add(_personB);
string _jsonString = "[{'Name':'YanZhiweiA','Age':10,'Address':'shanghaiA'},{'Name':'YanZhiweiB','Age':11,'Address':'shanghaiB'}]";
List <Person> _result = SerializeHelper.JsonDeserialize <List <Person> >(_jsonString);
bool _actual = _expected.SequenceEqual(_result, new PersonCompare());
Assert.IsTrue(_actual);
_jsonString = @"{'State':true,'Message':null,'Data':{'Access_token':'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJ0ZXN0IiwiaWF0IjoxNDkyNjc5NjU4Ljg1OTE2Nzh9.pwJV_9N5MLV8aWO9NF001OdnlnriWhDetQ2SI2xJWto','Expires_in':604800}}";
OperatedResult <TokenInfo> _actualTokenInfo = SerializeHelper.JsonDeserialize <OperatedResult <TokenInfo> >(_jsonString);
}
public void JsonSerializeTest()
{
//Person _personA = new Person()
//{
// Name = "YanZhiweiA",
// Age = 10,
// Address = "shanghaiA",
// Login = DateTime.Now,
// Birth = new DateTime(2012, 10, 10, 1, 1, 1)
//};
//Person _personB = new Person()
//{
// Name = "YanZhiweiB",
// Age = 11,
// Address = "shanghaiB",
// Login = DateTime.Now,
// Birth = new DateTime(2012, 10, 10, 1, 1, 1)
//};
//IList<Person> _personList = new List<Person>();
//_personList.Add(_personA);
//_personList.Add(_personB);
//CNDateTimeConverter _datetimeConvert = new CNDateTimeConverter("yyyy-MM-dd");
//string _actual = SerializeHelper.JsonSerialize<IList<Person>>(_personList, _datetimeConvert);
//string _expect = "[{\"Name\":\"YanZhiweiA\",\"Age\":10,\"Address\":\"shanghaiA\",\"Birth\":{\"DateTime\":\"2012-10-10\"},\"Login\":{\"DateTime\":\"2015-05-07\"},\"OptRecordList\":null},{\"Name\":\"YanZhiweiB\",\"Age\":11,\"Address\":\"shanghaiB\",\"Birth\":{\"DateTime\":\"2012-10-10\"},\"Login\":{\"DateTime\":\"2015-05-07\"},\"OptRecordList\":null}]";
//Assert.AreEqual<string>(_expect, _actual);
string _jsonString = SerializeHelper.JsonSerialize(OperatedResult <TokenInfo> .Success(new TokenInfo()
{
Access_token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJ0ZXN0IiwiaWF0IjoxNDkyNjc5NjU4Ljg1OTE2Nzh9.pwJV_9N5MLV8aWO9NF001OdnlnriWhDetQ2SI2xJWto", Expires_in = 604800
}));
}
protected void Page_Load(object sender, EventArgs e)
{
if (Request.Files.Count > 0)
{
WebUploadFile _uploadFile = new WebUploadFile();
_uploadFile.SetFileDirectory("/上传");
OperatedResult <UploadFileInfo> _uploadFileResult = _uploadFile.Save(Request.Files["File1"]);
Label1.Text = _uploadFileResult.State == true?string.Format("上传成功，保存路径：『{0}』", _uploadFileResult.Data.FilePath) : "上传失败" + _uploadFileResult.Message;
}
}
/// <summary>
/// 用户登录
/// </summary>
/// <returns>操作结果</returns>
public OperatedResult Login()
{
if (LoginStatus)
{
return(OperatedResult.Fail("已经处于登陆状态，不能进行登陆操作."));
}
CHCNetSDK.NET_DVR_DEVICEINFO_V30 _deviceInfo = new CHCNetSDK.NET_DVR_DEVICEINFO_V30();
UserId = CHCNetSDK.NET_DVR_Login_V30(VideoIPEndPoint.Address.ToString(), VideoIPEndPoint.Port, UserName, PassWord, ref _deviceInfo);
return(LoginStatus == true?OperatedResult.Success() : OperatedResult.Fail(LastErrorMessage));
}
/// <summary>
/// 开始录像
/// </summary>
/// <param name="saveVideoFilePath">视频格式存储全路径;eg:D:\20170913162510.mp4</param>
/// <returns>操作结果</returns>
public OperatedResult StartRecord(string saveVideoFilePath)
{
if (!IsPreviewing)
{
return(OperatedResult.Fail("尚未处于视频预览状态，不能进行开始录像操作."));
}
string _videoRecordFile = string.IsNullOrEmpty(saveVideoFilePath) != true ? saveVideoFilePath : string.Format(@"{0}\{1}.mp4", VideoFolders, DateTime.Now.ToString("yyyyMMddHHmmss"));
CHCNetSDK.NET_DVR_MakeKeyFrame(UserId, CurPreviewChannelNo);
IsRecording = CHCNetSDK.NET_DVR_SaveRealData(PreviewId, _videoRecordFile);
return(IsRecording == true?OperatedResult.Success() : OperatedResult.Fail(LastErrorMessage));
}
/// <summary>
/// 注册用户获取访问令牌接口
/// </summary>
/// <param name="userId">用户Id</param>
/// <param name="passWord">用户密码</param>
/// <param name="signature">加密签名字符串</param>
/// <param name="timestamp">时间戳</param>
/// <param name="nonce">随机数</param>
/// <param name="appid">应用接入ID</param>
/// <returns>OperatedResult</returns>
public OperatedResult <TokenInfo> GetAccessToken(string userId, string passWord,
string signature, string timestamp,
string nonce, Guid appid)
{
CheckResult _checkedParamter = CheckedCreateAccessTokenParamter(userId, passWord, signature, timestamp, nonce, appid);
if (!_checkedParamter.State)
{
return(OperatedResult <TokenInfo> .Fail(_checkedParamter.Message));
}
#region 检查用户合法性
CheckResult <UserInfo> _checkedUser = CheckedUser(userId, passWord);
if (!_checkedUser.State)
{
return(OperatedResult <TokenInfo> .Fail(_checkedUser.Message));
}
#endregion 检查用户合法性
#region 检查api请求通道合法性
CheckResult <AppInfo> _checkedAppChannel = CheckedAppInfo(appid);
if (!_checkedAppChannel.State)
{
return(OperatedResult <TokenInfo> .Fail(_checkedAppChannel.Message));
}
AppInfo _appInfo = _checkedAppChannel.Data;
#endregion 检查api请求通道合法性
#region 检查请求签名合法性
CheckResult _checkedSignature = SignatureHelper.Validate(signature, timestamp, nonce, _appInfo.AppSecret, _appInfo.SignatureExpiredMinutes);
if (!_checkedSignature.State)
{
return(OperatedResult <TokenInfo> .Fail(_checkedSignature.Message));
}
#endregion 检查请求签名合法性
UserInfo _userInfo = _checkedUser.Data;
TokenInfo _tokenData = BuilderTokenInfo(_userInfo, _appInfo);
return(OperatedResult <TokenInfo> .Success(_tokenData));
}
/// <summary>
/// 停止录像
/// </summary>
/// <returns>操作结果</returns>
public OperatedResult StopRecord()
{
if (!IsRecording)
{
return(OperatedResult.Fail("尚未处于视频录像状态，不能进行停止录像操作."));
}
bool _result = CHCNetSDK.NET_DVR_StopSaveRealData(PreviewId);
if (_result)
{
IsRecording = false;
}
return(_result == true?OperatedResult.Success() : OperatedResult.Fail(LastErrorMessage));
}
/// <summary>
/// 用户登出
/// </summary>
/// <returns>操作结果</returns>
public OperatedResult Logout()
{
if (!LoginStatus)
{
return(OperatedResult.Fail("尚未处于登陆状态，不能进行登出操作."));
}
if (CHCNetSDK.NET_DVR_Logout(UserId))
{
UserId = -1;
return(OperatedResult.Success());
}
else
{
return(OperatedResult.Fail(LastErrorMessage));
}
}
private OperatedResult <UploadImageInfo> GetUploadImageInfo(HttpPostedFile postedFile, string savePath)
{
CheckResult _checkedPostFileResult = CheckedPostFile(postedFile);
if (!_checkedPostFileResult.State)
{
return(OperatedResult <UploadImageInfo> .Fail(_checkedPostFileResult.Message));
}
int _randomNumber = RandomHelper.NextNumber(1000, 9999);
string _fileName = DateTime.Now.FormatDate(12) + _randomNumber,
_fileEx = Path.GetExtension(postedFile.FileName);
double _fileSize = postedFile.ContentLength / 1024.0 / 1024.0;
CheckResult _checkedUploadImageResult = CheckedUploadImageParamter(_fileEx, _fileSize);
if (!_checkedUploadImageResult.State)
{
return(OperatedResult <UploadImageInfo> .Fail(_checkedUploadImageResult.Message));
}
UploadImageInfo _uploadImageInfo = new UploadImageInfo();
_uploadImageInfo.FileName = _fileName + _fileEx;
_uploadImageInfo.FilePath = savePath.Trim('\\') + "\\" + _uploadImageInfo.FileName;
_uploadImageInfo.WebPath = "/" + _uploadImageInfo.FilePath.Replace(HttpContext.Current.Server.MapPath("~/"), "").Replace("\\", "/");
_uploadImageInfo.Size = _fileSize;
_uploadImageInfo.FileEx = _fileEx;
_uploadImageInfo.IsSetPicWater = !string.IsNullOrEmpty(SetPicWater);
_uploadImageInfo.IsSetWordWater = !string.IsNullOrEmpty(SetWordWater);
BitmapInfo _iamgeInfo = ImageHelper.GetBitmapInfo(postedFile.FileName);
_uploadImageInfo.SourceWidth = _iamgeInfo.Width;
_uploadImageInfo.SourceHeight = _iamgeInfo.Height;
_uploadImageInfo.IsCreateThumbnail = SetSmallImgWidth.Length != 0;
_uploadImageInfo.ThumbnailHeight = SetSmallImgHeight;
_uploadImageInfo.ThumbnailWidth = SetSmallImgWidth;
if (_uploadImageInfo.IsCreateThumbnail && SetSmallImgHeight.Length != SetSmallImgHeight.Length)
{
return(OperatedResult <UploadImageInfo> .Fail(GetCodeMessage(6)));
}
FileHelper.CreateDirectory(savePath);
postedFile.SaveAs(_uploadImageInfo.FilePath);
return(OperatedResult <UploadImageInfo> .Success(_uploadImageInfo));
}
/// <summary>
/// 创建合法用户获取访问令牌接口数据
/// </summary>
/// <param name="identityUser">IdentityUser</param>
/// <param name="appConfig">AppConfig</param>
/// <returns>IdentityToken</returns>
public OperatedResult <IdentityToken> CreateIdentityToken(IdentityUser identityUser, AppConfig appConfig)
{
ValidateOperator.Begin()
.NotNull(identityUser, "IdentityUser")
.NotNull(appConfig, "AppConfig");
var payload = new Dictionary <string, object>
{
{ "iss", identityUser.UserId },
{ "iat", UnixEpochHelper.GetCurrentUnixTimestamp().TotalSeconds }
};
var identityToken = new IdentityToken
{
AccessToken = CreateIdentityToken(appConfig.SharedKey, payload),
ExpiresIn = appConfig.TokenExpiredDay * 24 * 3600
};
return(OperatedResult <IdentityToken> .Success(identityToken));
}
/// <summary>
/// 停止视频预览
/// </summary>
/// <returns>操作结果</returns>
public OperatedResult StopPreview()
{
if (!IsPreviewing)
{
return(OperatedResult.Fail("尚未处于视频预览状态，不能进行停止预览操作."));
}
if (CHCNetSDK.NET_DVR_StopRealPlay(PreviewId))
{
PreviewId = -1;
CurPreviewChannelNo = 0;
return(OperatedResult.Success());
}
else
{
return(OperatedResult.Fail(LastErrorMessage));
}
}
/// <summary>
/// 保存表单文件,根据HttpPostedFile
/// </summary>
/// <param name="postFile">HttpPostedFile</param>
/// <returns>上传返回信息</returns>
private OperatedResult <UploadFileInfo> SaveUploadFile(HttpPostedFile postFile)
{
try
{
CheckResult <string> _checkedFileParamter = CheckedFileParamter(postFile);
if (!_checkedFileParamter.State)
{
return(OperatedResult <UploadFileInfo> .Fail(_checkedFileParamter.Message));
}
string _fileName = _checkedFileParamter.Data;
string _webDir = string.Empty;
// 获取存储目录
string _directory = this.GetDirectory(ref _webDir),
_filePath = _directory + _fileName;
if (File.Exists(_filePath))
{
if (uploadFileSetting.IsRenameSameFile)
{
_filePath = _directory + DateTime.Now.FormatDate(12) + "-" + _fileName;
}
else
{
File.Delete(_filePath);
}
}
// 保存文件
postFile.SaveAs(_filePath);
UploadFileInfo _uploadFileInfo = new UploadFileInfo();
_uploadFileInfo.FilePath = _filePath;
_uploadFileInfo.FilePath = _webDir + _fileName;
_uploadFileInfo.FileName = _fileName;
_uploadFileInfo.WebFilePath = _webDir + _fileName;
return(OperatedResult <UploadFileInfo> .Success(_uploadFileInfo));
}
catch (Exception ex)
{
return(OperatedResult <UploadFileInfo> .Fail(ex.Message));
}
}
/// <summary>
/// 验证Token令牌是否合法
/// </summary>
/// <param name="token">令牌</param>
/// <param name="appid">应用ID</param>
/// <returns>CheckResult</returns>
public OperatedResult <string> ValidateToken(string token, Guid appid)
{
CheckResult _checkedParamter = CheckedValidateTokenParamter(token, appid);
if (!_checkedParamter.State)
{
return(OperatedResult <string> .Fail(_checkedParamter.Message));
}
CheckResult <AppInfo> _checkedAppChannel = CheckedAppInfo(appid);
if (!_checkedAppChannel.State)
{
return(OperatedResult <string> .Fail(_checkedAppChannel.Message));
}
try
{
AppInfo _appInfo = _checkedAppChannel.Data;
string _tokenString = JwtHelper.ParseTokens(token, _appInfo.SharedKey);
if (string.IsNullOrEmpty(_tokenString))
{
return(OperatedResult <string> .Fail("用户令牌Token为空"));
}
dynamic _root = JObject.Parse(_tokenString);
string _userid = _root.iss;
double _jwtcreated = (double)_root.iat;
bool _validTokenExpired =
(new TimeSpan((int)(UnixEpochHelper.GetCurrentUnixTimestamp().TotalSeconds - _jwtcreated))
.TotalDays) > _appInfo.TokenExpiredDay;
return(_validTokenExpired == true ? OperatedResult <string> .Fail($"用户ID{_userid}令牌失效") : OperatedResult <string> .Success(_userid));
}
catch (FormatException)
{
return(OperatedResult <string> .Fail("用户令牌非法"));
}
catch (SignatureVerificationException)
{
return(OperatedResult <string> .Fail("用户令牌非法"));
}
}
/// <summary>
/// 视频预览
/// </summary>
/// <returns>操作结果</returns>
public OperatedResult Preview(ushort channelNumber, IntPtr previewUIHandle)
{
if (!LoginStatus)
{
return(OperatedResult.Fail("请先登陆后，再进行视频预览操作."));
}
if (IsPreviewing)
{
return(OperatedResult.Fail("已经处于视频预览状态，不能进行视频预览操作."));
}
CHCNetSDK.NET_DVR_PREVIEWINFO _previewParamter = new CHCNetSDK.NET_DVR_PREVIEWINFO();
_previewParamter.hPlayWnd = previewUIHandle; //预览窗口
_previewParamter.lChannel = channelNumber; //预te览的设备通道
_previewParamter.dwStreamType = 0; //码流类型：0-主码流，1-子码流，2-码流3，3-码流4，以此类推
_previewParamter.dwLinkMode = 0; //连接方式：0- TCP方式，1- UDP方式，2- 多播方式，3- RTP方式，4-RTP/RTSP，5-RSTP/HTTP
_previewParamter.bBlocked = true; //0- 非阻塞取流，1- 阻塞取流
_previewParamter.dwDisplayBufNum = 15; //播放库播放缓冲区最大缓冲帧数
IntPtr _pUser = new IntPtr(); //用户数据
PreviewId = CHCNetSDK.NET_DVR_RealPlay_V40(UserId, ref _previewParamter, null /*RealData*/, _pUser);
CurPreviewChannelNo = channelNumber;
return(IsPreviewing == true?OperatedResult.Success() : OperatedResult.Fail(LastErrorMessage));
}
public override void OnParameterIsNulling(HttpActionContext actionContext)
{
actionContext.Response =
actionContext.Request.CreateResponse(HttpStatusCode.BadRequest, OperatedResult <string> .Fail("请求参数非法。"));
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="originalImagePath">源图路径（物理路径）</param>
/// <param name="thumbnailPath">缩略图路径（物理路径）</param>
/// <param name="specifiedwidth">缩略图宽度</param>
/// <param name="specifiedheight">缩略图高度</param>
/// <param name="mode">生成缩略图的方式</param>
/// <param name="isaddwatermark">是否添加水印</param>
/// <param name="quality">图片品质</param>
/// <param name="imagePosition">水印位置</param>
/// <param name="waterImagePath">水印图片路径（物理路径）</param>
public static OperatedResult <string> BuilderThumbnails(string originalImagePath, string thumbnailPath, int specifiedwidth, int specifiedheight, ThumbnailImageCutMode mode, bool isaddwatermark, WatermarkImagesPosition imagePosition, string waterImagePath, int quality)
{
CheckResult _checkedThumbnailsParamter = CheckedThumbnailsParamter(originalImagePath, thumbnailPath, isaddwatermark, waterImagePath);
if (!_checkedThumbnailsParamter.State)
{
return(OperatedResult <string> .Fail(_checkedThumbnailsParamter.Message));
}
Image _originalImage = Image.FromFile(originalImagePath);
int _cutedWidth = specifiedwidth;
int _cutedHeight = specifiedheight;
int x = 0;
int y = 0;
int _originalWidth = _originalImage.Width;
int _originalHeigh = _originalImage.Height;
switch (mode)
{
case ThumbnailImageCutMode.W: //指定宽，高按比例
_cutedHeight = _originalImage.Height * specifiedwidth / _originalImage.Width;
break;
case ThumbnailImageCutMode.H: //指定高，宽按比例
_cutedWidth = _originalImage.Width * specifiedheight / _originalImage.Height;
break;
case ThumbnailImageCutMode.Cut: //指定高宽裁减（不变形）
if (_originalImage.Width >= _cutedWidth && _originalImage.Height >= _cutedHeight)
{
if ((double)_originalImage.Width / (double)_originalImage.Height > (double)_cutedWidth / (double)_cutedHeight)
{
_originalHeigh = _originalImage.Height;
_originalWidth = _originalImage.Height * _cutedWidth / _cutedHeight;
y = 0;
x = (_originalImage.Width - _originalWidth) / 2;
}
else
{
_originalWidth = _originalImage.Width;
_originalHeigh = _originalImage.Width * specifiedheight / _cutedWidth;
x = 0;
y = (_originalImage.Height - _originalHeigh) / 2;
}
}
else
{
x = (_originalImage.Width - _cutedWidth) / 2;
y = (_originalImage.Height - _cutedHeight) / 2;
_originalWidth = _cutedWidth;
_originalHeigh = _cutedHeight;
}
break;
case ThumbnailImageCutMode.Fit: //不超出尺寸，比它小就不截了，不留白，大就缩小到最佳尺寸，主要为手机用
if (_originalImage.Width > _cutedWidth && _originalImage.Height > _cutedHeight)
{
if ((double)_originalImage.Width / (double)_originalImage.Height > (double)_cutedWidth / (double)_cutedHeight)
{
_cutedHeight = _originalImage.Height * specifiedwidth / _originalImage.Width;
}
else
{
_cutedWidth = _originalImage.Width * specifiedheight / _originalImage.Height;
}
}
else if (_originalImage.Width > _cutedWidth)
{
_cutedHeight = _originalImage.Height * specifiedwidth / _originalImage.Width;
}
else if (_originalImage.Height > _cutedHeight)
{
_cutedWidth = _originalImage.Width * specifiedheight / _originalImage.Height;
}
else
{
_cutedWidth = _originalImage.Width;
_cutedHeight = _originalImage.Height;
_originalWidth = _cutedWidth;
_originalHeigh = _cutedHeight;
}
break;
default:
break;
}
Image _thumbnailImage = new Bitmap(_cutedWidth, _cutedHeight);
Graphics _g = SetThumbnailGraphics(_originalImage, _thumbnailImage, _cutedWidth, _cutedHeight, _originalWidth, _originalHeigh, x, y);
try
{
SetThumbnailWaterImage(isaddwatermark, waterImagePath, imagePosition, _g, _cutedWidth, _cutedHeight);
EncoderParameters _encoderParams = null;
ImageCodecInfo _jpegICI = SetThumbnailImageQuality(quality, out _encoderParams);
SaveThumbnailImage(thumbnailPath, _thumbnailImage, _jpegICI, _encoderParams);
}
catch (Exception ex)
{
OperatedResult <string> .Fail(string.Format("生成缩略图失败，原因:{0}", ex.Message));
}
finally
{
_originalImage.Dispose();
_thumbnailImage.Dispose();
_g.Dispose();
}
return(OperatedResult <string> .Success(string.Format("生成{0}的缩略图成功", originalImagePath), thumbnailPath));
}
