关于dynamics crm：无效的XML。

Invalid XML. ---&gt On A Plugin Containing FetchXML

当合同名称中存在&；或其他无效字符时，会发生这种情况。我的问题是，如何处理这些无效字符？？！！

Microsoft.Crm.CrmException: Invalid XML. --->
System.Xml.XmlException: An error occurred while parsing EntityName.
Line 13, position 117.
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.HandleEntityReference(Boolean isInAttributeValue, EntityExpandType expandType, Int32&
charRefEndPos)
at System.Xml.XmlTextReaderImpl.ParseAttributeValueSlow(Int32 curPos, Char quoteChar, NodeData attr)
at System.Xml.XmlTextReaderImpl.ParseAttributes()
at System.Xml.XmlTextReaderImpl.ParseElement()
at System.Xml.XmlTextReaderImpl.ParseElementContent()
at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r)
at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r, LoadOptions o)
at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options)
at Microsoft.Crm.Platform.Server.Utility.XmlHelper.LoadXmlInfo(String
xmlInfo)
at Microsoft.Crm.Query.EntityExpression.ExtractPlatformName(String fetchXml, XElement element).

以下是问题代码：

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//run a fetchXml query to get how many contract lines have these values

string fetchLines = @"
<fetch version='1.0' output-format='xml-platform' mapping='logical' distinct='false'>
<entity name='new_yummycontractline'>

<filter type='and'>
<condition attribute='new_servingtime' operator='eq' value='" + servingTime.ToString() + @"' />
<condition attribute='new_servinggroup' operator='eq' value='" + servingGroup.ToString() + @"' />
<condition attribute='new_destination' operator='eq' value='" + location.ToString() + @"' />
<condition attribute='statecode' operator='eq' value='0' />
</filter>
<link-entity name='new_yummycontract' from='new_yummycontractid' to='new_contractid' link-type='inner' alias='ad'>
<filter type='and'>
<condition attribute='new_yummycontractid' operator='eq' uiname='" + uiname + @"' uitype='new_yummycontract' value='" + contractId.ToString() + @"' />
</filter>
</link-entity>
</entity>
</fetch>";

EntityCollection results = service.RetrieveMultiple(new FetchExpression(fetchLines));

fetchxml工作不需要uiname和uitype。它们用于表示，而不是用于查询。我认为这些是由高级查找编辑器添加的；因此"ui"

您可以这样重写XML的那个部分

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不确定您使用的是.NET的哪个版本，但是您也可以使用$特殊字符来表示插入字符串，我认为这可以提高可读性并减少字符串连接

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string fetchLines = @$"
<fetch version='1.0' output-format='xml-platform' mapping='logical' distinct='false'>
<entity name='new_yummycontractline'>

<filter type='and'>
<condition attribute='new_servingtime' operator='eq' value='{servingTime}' />
<condition attribute='new_servinggroup' operator='eq' value='{servingGroup}' />
<condition attribute='new_destination' operator='eq' value='{location}' />
<condition attribute='statecode' operator='eq' value='0' />
</filter>
<link-entity name='new_yummycontract' from='new_yummycontractid' to='new_contractid' link-type='inner' alias='ad'>
<filter type='and'>
<condition attribute='new_yummycontractid' operator='eq' value='{contractId}' />
</filter>
</link-entity>
</entity>
</fetch>";

我用了webutility.htmlencode(uiname)，问题似乎已经消失了。我猜uiname有一些无效的xml字符，这个方法可以解决这个问题！