MS CRM c＃：从字典中提取字符串guid，并在创建新的CRM记录时使用它填充查找字段

Question

I'm a total newbie to C#. Trying to create a custom entity record. I have created a windows service that can connect and create the CRM custom entity record but only if I hard code the GUID's for the lookups.

How can I pickup the GUID from the dictionary and turn it into a lookup like I do for the text fields? snippet is below.

aar_assessmentresult aar_assessmentresult = new aar_assessmentresult();
foreach (string key in dicColumnList.Keys)
                    {
                        colVal = string.Empty;
                        if (dicColumnList.TryGetValue(key, out colVal))
                        {

                            //this works
                            if (key.ToString() == "AssessmentResultName")
                            {
                                aar_assessmentresult.aar_name = colVal.Replace("'", "''");
                            }

                            //Code breaks here                               
    if (key.ToString() == "ContactID")
                            {

                                Guid contactid = new Guid();
                                aar_assessmentresult.aar_contactid = new Lookup();
                                aar_assessmentresult.aar_contactid.type = "contact";
                                aar_assessmentresult.aar_contactid.Value = contactid;
                            }

                        }
                    }
 crmService.Create(aar_assessmentresult);

Answer 1

when you do this:

Guid contactid = new Guid(); 
aar_assessmentresult.aar_contactid = new Lookup(); 
aar_assessmentresult.aar_contactid.type = "contact"; 
aar_assessmentresult.aar_contactid.Value = contactid; 

you are trying to set a contact lookup with an invalid reference since your variable contactid does is not related to an existing contact record. You must create the contact in before or refer to a valid existing contact before doing

crmService.Create(aar_assessmentresult);