thank for jim wang resolve my problem FiltedLookupMulti

CRM 4.0里Lookup的过滤功能是个缺憾，大多是收费的解决方案。网友韩建兴提出一个很普遍的问题：

 

我有一個實體ShippingMark

1.它和Account是N:1

2.它和Quote是N:N

我的需求是Quote在新增已存在的ShiningMark時，

只顯示ShippingMark.AccountId=Quote.AccountId的資料，有什麽辦法嗎？

 

我之前写过三篇博文，是总结性的给出LookupSingle的过滤方案，在论坛里普遍被使用：

神秘的 CRM Lookup (I)

神秘的 CRM Lookup (II)

神秘的 CRM Lookup (III)

 

但并没有涉及到LookupMulti的问题，而这两者有很大的不同。

 

其实MVP Darren、刀客都有提出过利用Plugin的Execute方法来实现过滤的方案；Stunnware也有一个收费的解决方案。

我针对网友的需求给出代码，基本思想是Plugin代码通过JScript传送的参数来实现过滤的功能，这个方法的好处是不更改任何系统文件+免费。你可以根据你的需求来更改代码。

JScript部分直接调用了CRM的内部函数，所以此定制应该被视为unsupported customization(虽然是安全的).

 

第一部分，Plugin内容，需要注册成 Execute message on the Pre Stage/Synchronous/Server/Parent Pipeline.

/*
 * Microsoft Dynamics CRM Lookup Filter 
 * Plug-Ins: Execute message on the Pre Stage/Synchronous/Server/Parent Pipeline.
 * Jim Wang @ Aug 2009,  http://jianwang.blogspot.com ,  http://mscrm.cn
 * 
  */

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;
using  System.IO;
using  System.Web;
using  Microsoft.Crm.Sdk;

namespace  CRMExecuteEvent
{
     public   class  CRMExecuteEvent : IPlugin
    {     
         string  lookupId;

         public   void  Execute(IPluginExecutionContext context)
        {

            lookupId  =  HttpContext.Current.Request.QueryString[ " id " ]  ==   null   ?   null  : HttpContext.Current.Request.QueryString[ " id " ].ToString();

             if  (lookupId  ==   null )    return ;

             try
            {
                 if  (context.InputParameters.Contains( " FetchXml " ))
                {
                     string  beforeXml  =  (String)context.InputParameters[ " FetchXml " ];

                     if  (beforeXml.Contains( " <entity name=\ " new_shippingmark\ " > " )  &&  beforeXml.Contains( " xml-platform " ))
                    {
                         // Customise the FetchXml query string
                         string  afterXml  =
                         " <fetch version='1.0' page='1' count='100' output-format='xml-platform' mapping='logical'>  "   +
                             " <entity name='new_shippingmark'>  "   +
                                 " <attribute name='new_shippingmarkid' />  "   +
                                 " <attribute name='new_name' />  "   +
                                 " <attribute name='createdon' />  "   +
                                 " <order attribute='new_name' />  "   +
                                 " <link-entity name='quote' to='new_accountid' from='customerid'>  "   +
                                     " <filter type='and'>  "   +
                                         " <condition attribute = 'customerid' operator='eq' value=' "   +  lookupId  +   " '/>  "   +
                                     " </filter>  "   +
                                 " </link-entity>  "   +
                                 " <filter type='and'>  "   +
                                     " <condition attribute='statecode' operator='eq' value='0' />  "   +
                                     " <condition attribute='new_name' operator='like' value='%' />  "   +
                                 " </filter>  "   +
                             " </entity>  "   +
                         " </fetch> " ;

                         // Replace the FetchXml query string
                        context.InputParameters[ " FetchXml " ]  =  beforeXml.Replace(beforeXml, afterXml);

                    }
                }
            }

             catch  (System.Web.Services.Protocols.SoapException ex)
            {
                 throw   new  InvalidPluginExecutionException( " An error occurred in the CRM plug-in. " , ex);
            }
        }

    }
}

第二部分，JScript的内容，放在Quote的Onload里面，你需要修改relId

var relId = "new_new_shippingmark_quote";
var lookupId = crmForm.all.customerid;  

var lookupEntityTypeCode;
var navId = document.getElementById("nav" + relId);
if (navId != null)
{
    var la = navId.onclick.toString();
    la = la.substring(la.indexOf("loadArea"), la.indexOf(";"));
    
    navId.onclick = function()
    {
        eval(la);

        var areaId = document.getElementById("area" + relId + "Frame");
        if(areaId != null)
        {
            areaId.onreadystatechange = function() 
            {
                if (areaId.readyState == "complete") 
                {  
                    var frame = frames[window.event.srcElement.id];  
                    var li = frame.document.getElementsByTagName("li");    

                    for (var i = 0; i < li.length; i++)
                    {
                        var action = li[i].getAttribute("action");
                        if(action != null && action.indexOf(relId) > 1)
                        {
                            lookupEntityTypeCode = action.substring(action.indexOf("\(")+1, action.indexOf(","));
                            li[i].onclick = CustomLookup;
                            break;
                        }
                    }
                }
            }
        }
    }
}

function CustomLookup()
{
    var lookupSrc = "/" + ORG_UNIQUE_NAME + "/_controls/lookup/lookupmulti.aspx?class=&objecttypes=" + lookupEntityTypeCode + "&browse=0";
    if(lookupId != null && lookupId.DataValue != null && lookupId.DataValue[0] != null)
    {
        lookupSrc = lookupSrc + "&id=" + lookupId.DataValue[0].id;
    }

    var lookupItems = window.showModalDialog(lookupSrc, null);
    if (lookupItems)
    {
        if ( lookupItems.items.length > 0 )
        {
            AssociateObjects( crmFormSubmit.crmFormSubmitObjectType.value, crmFormSubmit.crmFormSubmitId.value, lookupEntityTypeCode, lookupItems, true, null, relId);  // This is the CRM internal JS funciton on \_static\_grid\action.js
        }
    }
}