c# - 无法从已加载的输入文档中删除空格。将输入文档提供为 XmlReader

Question

我想转换 XML 文档，但遇到问题。

我的 XSLT 看起来像这样:

<?xml version="1.0" encoding="iso-8859-1" ?> 
<xsl:stylesheet version="1.0"xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="html" /> 
    <xsl:strip-space elements="*" /> 

    <xsl:template match="/">
        <xsl:apply-templates select="address" /> 
    </xsl:template>

    <xsl:template match="address">
        <xsl:value-of select="@street" /> 
        <xsl:value-of select="@housenr" /> 
        <xsl:value-of select="@zipcode" /> 
        <xsl:value-of select="@city" /> 
        <xsl:value-of select="@country" /> 
    </xsl:template>
</xsl:stylesheet>

我想要转换的 XML 文档如下所示:

<address id="4" type="1" 
    typename="Postadres" 
    street="pak street" 
    housenr="420" 
    zipcode="42000" 
    city="Nill" 
    country="Lahore" 
    kix="" /> 

这是我编写的代码:

public static string Transform(XmlDocument doc, XmlDocument stylesheet)
{
    var transform = new System.Xml.Xsl.XslCompiledTransform();
    XmlDocument domOutput = new XmlDocument();

    stylesheet.PreserveWhitespace = false;
    transform.Load(stylesheet);    // compiled stylesheet

    MemoryStream oStream = new MemoryStream();
    var writer = new System.IO.StringWriter();

    transform.Transform(doc, (XsltArgumentList)null, oStream);

    domOutput.Load(oStream);

    return writer.ToString();
}

下面的行抛出异常

transform.Transform(doc, (XsltArgumentList)null, oStream);

异常消息:

White space cannot be stripped from input documents that have already been loaded. Provide the input document as an XmlReader instead.

你能告诉我我做错了什么吗？

提前致谢!

Answer 1

我解决了。实际上“XslCompiledTransform.Transform”将XmlReader作为第一个参数，我在第一个参数中传递XmlDocument。 这是代码。

public static string Transform(XmlDocument doc, XmlDocument stylesheet)
    {
        try
        {
            System.Xml.Xsl.XslCompiledTransform transform = new System.Xml.Xsl.XslCompiledTransform();
            transform.Load(stylesheet); // compiled stylesheet
            System.IO.StringWriter writer = new System.IO.StringWriter();
            XmlReader xmlReadB = new XmlTextReader(new StringReader(doc.DocumentElement.OuterXml));
            transform.Transform(xmlReadB, null, writer);
            return writer.ToString();
        }
        catch (Exception ex)
        {
            throw ex;
        }

    }