指定的转换无效

Question

我正在尝试为我继承的代码回顾性地编写一些单元测试。

一个特定的方法导致我在 Dynamics CRM 2011 插件方法中出现问题，在 QueryExpression

中使用 LinkedEntity FilterCondition

实体结构

联系人 -(N:1 [查找])-> CustomEntity1 -(N:1 [查找])-> CustomEntity2

方法的目的

我正在尝试测试的方法创建了一个 QueryExpression，它根据 CustomEntity1 的属性过滤 Contacts，包括 LookupField 到 [=19] 的值=].

工作查询代码

为了测试我对 QueryExpression 的理解，我重写了如下代码

  QueryExpression query = new QueryExpression();
  query.EntityName = "contact";
  query.ColumnSet = new ColumnSet(true);

  query.Criteria = new FilterExpression();
  query.Criteria.FilterOperator = LogicalOperator.And;

  FilterExpression filter = new FilterExpression(LogicalOperator.And);

  FilterExpression filter1 = new FilterExpression(LogicalOperator.Or);
  filter1.Conditions.Add(new ConditionExpression("new_datefield1", ConditionOperator.Null));
  filter1.Conditions.Add(new ConditionExpression("new_datefield1", ConditionOperator.LessEqual, offset));

  FilterExpression filter2 = new FilterExpression(LogicalOperator.Or);
  filter2.Conditions.Add(new ConditionExpression("new_datefield2", ConditionOperator.Null));
  filter2.Conditions.Add(new ConditionExpression("new_datefield2", ConditionOperator.LessEqual, offset));

  filter.AddFilter(filter1);
  filter.AddFilter(filter2);

  query.Criteria.Filters.Add(filter);

  // Create the link from the contact to the CustomEntity1 entity
  LinkEntity linkHistory = new LinkEntity(Contact.EntityLogicalName, new_CustomEntity1.EntityLogicalName, Contact.AttributeNames.new_CustomEntity1Lookup, new_CustomEntity1.AttributeNames.Id, JoinOperator.Inner);
  linkHistory.Columns = new ColumnSet(true);
  linkHistory.EntityAlias = "custEnt1";

  linkHistory.LinkCriteria = new FilterExpression();
  linkHistory.LinkCriteria.FilterOperator = LogicalOperator.And;

  #region code added to make the test work
  // Create the CustomEntity2 condition
  LinkEntity linkStatus = new LinkEntity(new_CustomEntity1.EntityLogicalName, new_CustomEntity2.EntityLogicalName, new_CustomEntity1.AttributeNames.new_CustomEntity2Lookup, new_CustomEntity2.AttributeNames.Id, JoinOperator.Inner);
  linkStatus.Columns = new ColumnSet(true);
  linkStatus.EntityAlias = "custEnt2";

  linkStatus.LinkCriteria = new FilterExpression();
  linkStatus.LinkCriteria.FilterOperator = LogicalOperator.And;
  linkStatus.LinkCriteria.Conditions.Add(new ConditionExpression(new_CustomEntity2.AttributeNames.Id, ConditionOperator.Equal, indStatus.Id));

  linkHistory.LinkEntities.Add(linkStatus);
  #endregion

  //some code removed for brevity

  query.LinkEntities.Add(linkHistory);

此代码 returns 一个 QueryExpression，然后用于运行测试，当运行在 FakeXrmEasy 中设置一些测试数据时测试通过。但是，我需要确保我的更改不会对当前代码和逻辑产生负面影响，因此我想在进行任何更改之前根据当前方法检查我的结果。

非工作代码

QueryExpression query = new QueryExpression();

query.PageInfo = new PagingInfo();
query.PageInfo.Count = fetchCount;
query.PageInfo.PageNumber = pageNumber;
query.PageInfo.PagingCookie = null;

// Setup the query for the contact entity
query.EntityName = Contact.EntityLogicalName;

// Specify the columns to retrieve
query.ColumnSet = new ColumnSet(true);

query.Criteria = new FilterExpression();
query.Criteria.FilterOperator = LogicalOperator.And;

FilterExpression filter1 = new FilterExpression();
filter1.FilterOperator = LogicalOperator.Or;

// Create the e2sds_lastcontactdate condition
ConditionExpression condition1 = new ConditionExpression();
condition1.AttributeName = Contact.AttributeNames.new_DateField1;
condition1.Operator = ConditionOperator.Null;

// Create the e2sds_lastcontactdate condition
ConditionExpression condition2 = new ConditionExpression();
condition2.AttributeName = Contact.AttributeNames.new_DateField1;
condition2.Operator = ConditionOperator.LessEqual;
condition2.Values.Add(offset);

FilterExpression filter2 = new FilterExpression();
filter2.FilterOperator = LogicalOperator.Or;

// Create the Last Third Party Contact condition
ConditionExpression ltpcCond1 = new ConditionExpression();
condition1.AttributeName = Contact.AttributeNames.new_DateField2;
condition1.Operator = ConditionOperator.Null;

// Create the Last Third Party Contactcondition
ConditionExpression ltpcCond2 = new ConditionExpression();
condition2.AttributeName = Contact.AttributeNames.new_DateField2;
condition2.Operator = ConditionOperator.LessEqual;
condition2.Values.Add(offset);

filter2.Conditions.AddRange(ltpcCond1, ltpcCond2);

query.Criteria.Filters.Add(filter1);
query.Criteria.Filters.Add(filter2);

// Create the link from the contact to the CustomEntity1 entity
LinkEntity linkHistory = new LinkEntity();
linkHistory.JoinOperator = JoinOperator.Natural;
linkHistory.LinkFromEntityName = Contact.EntityLogicalName;
linkHistory.LinkFromAttributeName = Contact.AttributeNames.new_CustomEntity1Lookup;
linkHistory.LinkToEntityName = new_CustomEntity1.EntityLogicalName;
linkHistory.LinkToAttributeName = new_CustomEntity1.AttributeNames.Id;

linkHistory.LinkCriteria = new FilterExpression();
linkHistory.LinkCriteria.FilterOperator = LogicalOperator.And;

#region this code throws a specified cast not valid exception
// Create the e2sds_statusid condition
ConditionExpression condition3 = new ConditionExpression();
condition3.AttributeName = new_CustomEntity1.AttributeNames.new_CustomEntity2LookupField;
condition3.Operator = ConditionOperator.Equal;
condition3.Values.Add(status.Id);
#endregion

linkHistory.LinkCriteria.Conditions.Add(condition3);

//removed code for brevity

query.LinkEntities.Add(linkHistory);

我试过的 不幸的是，由于 QueryExpression 是在 RetrieveMultiple 请求中执行的，因此我无法进入代码以找出导致无效转换的数据，但是，注释掉在非工作中标记的区域代码意味着异常消失。

重写代码是一种选择 - 这就是我如何知道 TestData 作为我编写的工作 QueryExpression 代码工作的 returns 一组数据。

我目前不知道问题是出在 QueryExpression 还是 FakeXrmEasy 上，所以如果无法提供实际的解决方案，即使提供追踪问题根本原因的方法也会有所帮助。

注意：出于保密原因，自定义实体、字段和查找的名称已更改。如果名称不匹配，则可能是手动换位错误而不是代码问题。

Answer 1

这与crmsvcutil 生成代理类型的方式有关。不同版本之间可能存在差异。

刚刚更新了问题on GitHub

指定的转换无效

Specified Cast Invalid

c#

unit-testing

query-expressions

dynamics-crm-2011

fakexrmeasy