&引起XML代码错误的符号 [英] & Symbol causing error in XML Code

问题描述

我有以下XML代码正在以 Crm Dynamics表单过滤查找字段。
在输入到帐户字段中的数据之后使用过滤器。但是，account字段可以包含& 符号，当它包含时，会发生错误，指出XML格式不正确。

I have the following XML code that is filtering my Lookup Field in my Crm Dynamics form. The filter is used following the data that is entered into the Account Field. However, the account field can contain the & symbol, and when it does, an error occurs stating that the XML is not well formed.

有人对这个问题有解决方案吗？

Does anyone have any solutions to the problem?

function accountcontact()
{
    Xrm.Page.getControl("new_contactlookup").addPreSearch(function () { addcontactlookup(); });

    function addcontactlookup()
    {
        var accountID = Xrm.Page.getAttribute("new_companylookup");
        var AccountIDObj= accountID.getValue();

        if (AccountIDObj != null)
        {
            var fetchFilter1 = "<filter type='and'><condition attribute='parentcustomerid' uitype='" + AccountIDObj[0].entityType + "' operator='eq' value='" + AccountIDObj[0].id + "' uiname='" + AccountIDObj[0].name + "' /></filter>";
            Xrm.Page.getControl("new_contactlookup").addCustomFilter(fetchFilter1);
        }
    }
}

推荐答案

某些字符在XML中具有特殊含义，而&符（&）是其中之一。因此，应将这些字符替换为其相应的实体引用（即使用字符串替换）。根据XML规范，XML中有5个预定义实体 ：

Some characters have special meaning in XML and ampersand (&) is one of them. Consequently, these characters should be substituted (ie use string replacement) with their respective entity references. Per the XML specification, there are 5 predefined entities in XML:

&lt;    <   less than
&gt;    >   greater than
&amp;   &   ampersand 
&apos;  '   apostrophe
&quot;  "   quotation mark

或者，您可以在CDATA部分中放置可能包含特殊字符的文本字符串因此XML解析器将不会尝试解析它们。例如：

Alternatively, you can place "text" strings that might contain special characters within a CDATA section so XML parsers will not attempt to parse them. Example:

<SomeElement><![CDATA[This & will be ignored]]></SomeElement>

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