crm2011创建和读取注释

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private string entityName = "annotation";

        public void Create(IOrganizationService service)
        {
            string body = "Sample Annotation Text";
            Entity entity = new Entity() { LogicalName = entityName };
            //主题
            entity["subject"] = "Example Annotation";
            //文件名称
            entity["filename"] = "ExampleAnnotationAttachment.txt";
            //文件内容
            entity["documentbody"] = Convert.ToBase64String(new UnicodeEncoding().GetBytes(body));
            //文件下载类型
            entity["mimetype"] = "text/plain";
            //文件大小
            entity["filesize"] = body.Length;
            //关联的记录id
            entity["objectid"] = Guid.NewGuid().ToString();

            Guid _annotationId = service.Create(entity);
            System.Console.WriteLine("创建注释结束");
        }

        public void Read(IOrganizationService service, Guid annotationId)
        {
            Entity entity = service.Retrieve(entityName, annotationId, new Microsoft.Xrm.Sdk.Query.ColumnSet("filename", "documentbody"));
            string filename = entity["filename"].ToString();
            string documentbody = entity["documentbody"].ToString();

            using (System.IO.FileStream fileStream = new System.IO.FileStream(filename, System.IO.FileMode.OpenOrCreate))
            {
                byte[] fileContent = Convert.FromBase64String(documentbody);
                fileStream.Write(fileContent, 0, fileContent.Length);
            }

System.Console.WriteLine("读取文件结束");
}

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