CRM2011对删除和添加操作会自动做判断，比如A打开纪录x，B也打开纪录x，然后B删除了纪录x，A去更新的话就会有提示。更新的话是后者覆盖前者，比如A打开纪录x，B打开纪录x，然后B把记录x中的字段y更新成了3，然后点保存，A把字段y更新成了5保存，最后5会覆盖3。这篇日志解决的问题就是当A改成5想保存的时候提示记录x已在某个时间点被某人更新过了，如果继续保存就会覆盖记录，否则放弃保存。
用js完成整个验证，然后注册form的onload和onsave达到目的，当然也要添加jquery和json2两个js类库
上js先
var previousModificationDateOnLoad;
//var serverUrl = Xrm.Page.context.getServerUrl();
var serverUrl = document.location.protocol + "//" + document.location.host + "/" + Xrm.Page.context.getOrgUniqueName();
var ODATA_ENDPOINT = "/XRMServices/2011/OrganizationData.svc";
var recordId;
var entityName;
function getPreviousModificationDate()
{
recordId = Xrm.Page.data.entity.getId().replace('{','').replace('}','');
entityName = Xrm.Page.data.entity.getEntityName() + "Set";
previousModificationDateOnLoad = new Date();
retrieveRecord(recordId,entityName, function(data){
previousModificationDateOnLoad = data.ModifiedOn;
previousModificationDateOnLoad = new Date(parseInt(/\/Date\((\d+).*/.exec(previousModificationDateOnLoad)[1]));
},null, false);
//alert(previousModificationDateOnLoad);
} function validateConcurrency(ExecutionObj)
{
if(Xrm.Page.ui.getFormType()==1)
{
return;
}
var previousModificationDateOnSave, previousModifiedByOnSave;
retrieveRecord(recordId,entityName, function(data){
previousModificationDateOnSave = data.ModifiedOn;
//alert(previousModificationDateOnSave);
previousModifiedByOnSave = data.ModifiedBy.Name;
//alert(previousModifiedByOnSave);
//change timestamp to date format
previousModificationDateOnSave = new Date(parseInt(/\/Date\((\d+).*/.exec(previousModificationDateOnSave)[1]));
//alert(previousModificationDateOnLoad + "\n"+previousModificationDateOnSave)
if(previousModificationDateOnLoad < previousModificationDateOnSave)
{
var continueSave = confirm("The record was recently modified by "+previousModifiedByOnSave+ " On " +
previousModificationDateOnSave + ".If you chose to save this record you will overwrite the recent changes made by "+
previousModifiedByOnSave+"\nAre you sure you want to save this record?");
if(!continueSave)
{
ExecutionObj.getEventArgs().preventDefault();
event.returnValue = false; }
}
//previousModificationDateOnLoad = previousModificationDateOnSave;
},null, false);
} function retrieveRecord(id, odataSetName,successCallback, errorCallback, aSync)
{
if(aSync==null || aSync==undefined)
{
aSync = true;
}
//alert(serverUrl +ODATA_ENDPOINT +"/"+odataSetName+"(guid'"+id+"')");
$.ajax({
type:"GET",
contentType:"application/json;charset=utf-8",
datatype:"json",
async:aSync,
url:serverUrl +ODATA_ENDPOINT +"/"+odataSetName+"(guid'"+id+"')",
beforeSend:function(XMLHttpRequest){
XMLHttpRequest.setRequestHeader("Accept","application/json");
},
success:function(data,textStatus,XmlHttpRequest){
if(successCallback){
successCallback(data.d,textStatus,XmlHttpRequest);
}
},
error:function(XmlHttpRequest,textStatus,errorThrown){
alert("error");
if(errorCallback){
errorCallback(XmlHttpRequest,textStatus,errorThrown);
}
}
});
}
CRM中的配置
然后选中validateConcurrency点击Edit,勾选Pass execution context as first parameter
就这些配置，可以实现排他机制咯。