Microsoft Dynamics CRM 4.0 Plugin 取值，赋值，查询

            DynamicEntity postImageEntity = (DynamicEntity)context.PostEntityImages["PostImage"];

            if (postImageEntity != null)
            {

                Guid new_accountId = Guid.Empty;
                decimal new_book_credit = 0M;
                CrmDateTime new_expiry_date = new CrmDateTime(DateTime.Now.ToString());

                int new_status = ;

                //状态
                if (postImageEntity.Properties.Contains("new_status"))
                {
                    new_status = ((Picklist)postImageEntity.Properties["new_status"]).Value;
                }

                //经销商GUID
                if (postImageEntity.Properties.Contains("new_account"))
                {
                    new_accountId = ((Lookup)postImageEntity.Properties["new_account"]).Value;
                }

                decimal new_credit_line = 0M;
                decimal new_remaining_credits = 0M;

                //ColumnSet cols = new ColumnSet(new string[] { "new_credit_line", "new_remaining_credits" });
                //account acc_entity = (account)crmService.Retrieve("account", new_accountId, cols);//这里和CRM2011不一样，
                返回的为BusinessEntity，并且这里只能取account得系统字段的值。

                //查询条件
                QueryExpression query = new QueryExpression();
                query.EntityName = "account";
                query.ColumnSet = new ColumnSet();
                query.ColumnSet.AddColumns(new string[] { "new_credit_line", "new_remaining_credits" });

                //条件表达式
                ConditionExpression condition = new ConditionExpression();
                condition.AttributeName = "accountid";
                condition.Values = new string[] { new_accountId.ToString() };

                //筛选
                FilterExpression filter = new FilterExpression();
                filter.FilterOperator = LogicalOperator.And;
                filter.Conditions.Add(condition);
                query.Criteria.Filters.Add(filter);

                //查询
                RetrieveMultipleRequest request = new RetrieveMultipleRequest();
                request.Query = query;
                request.ReturnDynamicEntities = true;

                //响应
                RetrieveMultipleResponse response = (RetrieveMultipleResponse)crmService.Execute(request);
                BusinessEntityCollection entityCollection = response.BusinessEntityCollection;

                if (entityCollection.BusinessEntities.Count == ) return;

                DynamicEntity acc_entity = (DynamicEntity)entityCollection.BusinessEntities[];

                //期初信用额度
                if (acc_entity.Properties.Contains("new_credit_line"))
                {
                    new_credit_line = cu.RoundDecimal(((CrmMoney)acc_entity.Properties["new_credit_line"]).Value);
                }

                //剩余信用额度
                if (acc_entity.Properties.Contains("new_remaining_credits"))
                {
                    new_remaining_credits = cu.RoundDecimal(((CrmMoney)acc_entity.Properties["new_remaining_credits"]).Value);
                }

                cu.WriteLog("new_remaining_credits:" + new_remaining_credits);
                //赊销额度
                if (postImageEntity.Properties.Contains("new_book_credit"))
                {
                    new_book_credit = cu.RoundDecimal(((CrmMoney)postImageEntity.Properties["new_book_credit"]).Value);
                }
                cu.WriteLog("new_book_credit:" + new_book_credit);
                //赊销变更效期
                if (postImageEntity.Properties.Contains("new_expiry_date"))
                {
                    new_expiry_date = ((CrmDateTime)postImageEntity.Properties["new_expiry_date"]);
                }

                DynamicEntity accountEntity = new DynamicEntity("account");

                if (!string.IsNullOrEmpty(new_book_credit.ToString()))
                {
                    //信用额度
                    accountEntity.Properties.Add(new CrmMoneyProperty("new_credit_line", new CrmMoney(cu.RoundDecimal(new_book_credit))));
                }

                if (!string.IsNullOrEmpty(new_expiry_date.ToString()))
                {
                    //信用额度截止日期
                    accountEntity.Properties.Add(new CrmDateTimeProperty("new_expiration_date", new_expiry_date));
                }

                decimal totalnew_credit_line = 0M;
                decimal totalnew_remaining_credits = 0M;

                if (string.IsNullOrEmpty(new_credit_line.ToString()))
                {
                    new_credit_line = 0M;
                }

                if (string.IsNullOrEmpty(new_book_credit.ToString()))
                {
                    new_book_credit = 0M;
                }

                //经销商【期初信用额度】= 起初的经销商【期初信用额度】 + 【赊销额度】
                totalnew_credit_line = new_credit_line + new_book_credit;

                //经销商【剩余信用额度】= 起初的经销商【剩余信用额度】 + 【赊销额度】
                totalnew_remaining_credits = new_remaining_credits + new_book_credit;

                //期初信用额度
                accountEntity.Properties.Add(new CrmMoneyProperty("new_credit_line", new CrmMoney(totalnew_credit_line)));

                //剩余信用额度
                accountEntity.Properties.Add(new CrmMoneyProperty("new_remaining_credits", new CrmMoney(totalnew_remaining_credits)));

                if (new_accountId != Guid.Empty)
                {
                    accountEntity.Properties.Add(new KeyProperty("accountid", new Key(new_accountId)));
                }

                if (new_status == )
                {
                    crmService.Update(accountEntity);//更新操作
                }
              }