无法使用 C# 在 Dynamics CRM 中分配托管内存

Question

我在 Dynamics CRM 中有 1,072,369 联系人记录。我需要检索它们然后进行操作。现在，在检索时我遇到了以下异常

未能分配 1073741824 字节的托管内存缓冲区。可用内存量可能很低。

我将其时间跨度增加到 10 分钟，但没有运气。

我正在寻求您的建议/帮助来解决它。以下是我的代码 sn-p。

ColumnSet col = new ColumnSet();
col.AddColumns("new_name", "accountid", "contactid");

                //get Related Record
                QueryExpression qe = new QueryExpression
                {
                    EntityName = entity,
                    ColumnSet = col,
                    Criteria = new FilterExpression
                    {
                        Conditions = { 
                        new ConditionExpression("accountid",ConditionOperator.NotNull),
                        new ConditionExpression("statecode",ConditionOperator.Equal,0)
                    }
                    }
                };

                EntityCollection ec = sp.RetrieveMultiple(qe);

Answer 1

你有1,072,369，所以我建议你批量检索这些记录。如果对检索记录有帮助，可以试试下面这段代码。

            QueryExpression qe = new QueryExpression
            {
                EntityName = entity,
                ColumnSet = col,
                Criteria = new FilterExpression
                {
                    Conditions = { 
                    new ConditionExpression("accountid",ConditionOperator.NotNull),
                    new ConditionExpression("statecode",ConditionOperator.Equal,0)
                }
                }
            };

            qe.PageInfo = new PagingInfo();
            qe.PageInfo.PagingCookie = null;
            qe.PageInfo.PageNumber = 1;
            qe.PageInfo.Count = 500;

while (true)
            {
                EntityCollection results= sp.RetrieveMultiple(qe);
                if (results.Entities != null)
                {

                }

                // Check for more records, if it returns true.
                if (results.MoreRecords)
                {
                    Console.WriteLine("\n****************\nPage number {0}\n****************", pagequery.PageInfo.PageNumber);
                    Console.WriteLine("#\tAccount Name\t\tEmail Address");

                    // Increment the page number to retrieve the next page.
                    pagequery.PageInfo.PageNumber++;

                    // Set the paging cookie to the paging cookie returned from current results.
                    pagequery.PageInfo.PagingCookie = results.PagingCookie;
                }
                else
                {
                    // If no more records are in the result nodes, exit the loop.
                    break;
                }
            }

请参阅此处了解更多详情：

https://msdn.microsoft.com/en-us/library/gg327917.aspxPage large result sets with QueryExpression

PAGING QUERIES IN DYNAMICS CRM 2011