//3,需先将封面上传至目标公众号
//3.1,下载原公众号中封面图片.判断是否存在?不存在,则下载
//注:需判断文件夹是否存在?若不存在,则创建
string folderName = CurrentAppInfo.AppPath + @"\MaterialFile\thumb\";
if (!Directory.Exists(folderName))
{Directory.CreateDirectory(folderName);
}
string fileFullName = folderName + sourceThumbMediaId + ".png";
FileInfo fi = new FileInfo(fileFullName);
if (!fi.Exists)
{string sourceAccessToken = this.wxpService.GetAccessToken(this.sourceSourceID);Stream imageStream = this.wxpService.GetMaterial(sourceAccessToken, sourceThumbMediaId);Image image = Image.FromStream(imageStream);Bitmap bitmap = new Bitmap(image);bitmap.Save(fileFullName);
}//3.2,再上传至目标公众号
//此处是上传封面图片
string targetAccessToken = this.wxpService.GetAccessToken(this.targetSourceID);
UploadMaterialApiResultModel modelApiResult1 = this.wxpService.UploadMaterialAny(targetAccessToken, new wxpmaterialBillModel()
{IsTemp = "0",FileFullName = fi.FullName,MaterialType = MaterialType.thumb.ToString()
});
string targetThumbMediaId = modelApiResult1.media_id;//3,加工数据
wxpapiaccountBillModel modelSourceApiAccount = this.listApiAccount.FirstOrDefault(c => c.SourceID == this.sourceSourceID);
wxpapiaccountBillModel modelTargetApiAccount = this.listApiAccount.FirstOrDefault(c => c.SourceID == this.targetSourceID);
content = content.Replace(modelSourceApiAccount.SourceCode, modelTargetApiAccount.SourceCode);
content = content.Replace(modelSourceApiAccount.SourceName, modelTargetApiAccount.SourceName);//二维码图片可能有多个,分隔符是:分号
//注:目标地址只获取第1个即可
string[] qrcodeUrl1s = modelSourceApiAccount.QRCodeUrlPath.Split(';');
string qrcodeUrl2 = modelTargetApiAccount.QRCodeUrlPath.Split(';')[0];
foreach (string qrcodeUrl1 in qrcodeUrl1s)
{content = content.Replace(qrcodeUrl1, qrcodeUrl2);
}UploadNewsModel modelUpload = new UploadNewsModel()
{title = title,author = author,digest = digest,content = content,content_source_url = targetSourceUrl,show_cover_pic = "0",thumb_media_id = targetThumbMediaId
};//4,上传素材至目标公众号
UploadMaterialApiResultModel modelResult = this.wxpService.UploadMaterialNews(targetAccessToken, new List<UploadNewsModel>() { modelUpload });//4.1,需标记源公众号中此素材已转发
wxpmaterialBillModel modelEditToSource = new wxpmaterialBillModel()
{SourceID = this.sourceSourceID,MaterialCode = this.sourceMaterialCode,IsTranspond = "1",ActionName = "SetIsTranspond",
};
this.wxpService.UpdateMaterial(new List<wxpmaterialBillModel>() { modelEditToSource });

copymaterialQueryModel copymaterialParamModel = new Base.Models.copymaterialQueryModel()
{sourceSourceID = this.sourceSourceID,sourceMaterialCode = this.sourceMaterialCode,targetSourceID = this.targetSourceID,title = title,digest = digest,author = author,targetSourceUrl = targetSourceUrl,wxAccessToken = wxAccessToken
};
UploadMaterialApiResultModel modelResult = WebAPIHelper.WebAPIPostData<UploadMaterialApiResultModel>(ControllerName.WXPublicApi, WXPublicApiActionName.CopyMaterial.ToString(), copymaterialParamModel);