如何使用.NET中的文件将XML转换为字符串？

假设我有两个字符串：

• 一个是XML数据
• 另一个是XSL数据。

如果您必须知道，xml和xsl数据将存储在数据库列中。

如何在C＃中转换XML w / o首先将xml和xsl保存为文件？ 我希望输出也是一个字符串（转换中的HTML）。

似乎C＃更喜欢通过文件进行转换。 我在XslCompiledTransform中找不到Load（）的字符串输入重载。 所以，这就是我要问的原因。

Answer 1

这就是我的用途。 这是你的答案的组合。 我投了这些灵感的答案：

string output = String.Empty; using (StringReader srt = new StringReader(xslInput)) // xslInput is a string that contains xsl using (StringReader sri = new StringReader(xmlInput)) // xmlInput is a string that contains xml { using (XmlReader xrt = XmlReader.Create(srt)) using (XmlReader xri = XmlReader.Create(sri)) { XslCompiledTransform xslt = new XslCompiledTransform(); xslt.Load(xrt); using (StringWriter sw = new StringWriter()) using (XmlWriter xwo = XmlWriter.Create(sw, xslt.OutputSettings)) // use OutputSettings of xsl, so it can be output as HTML { xslt.Transform(xri, xwo); output = sw.ToString(); } } } 

注意：xsl中需要此语句，以便以HTML格式输出：

Answer 2

我花了很长时间（几年）才弄清楚如果使用正确的习语，使用Stream和/或TextWriter简洁代码是多么简单。

假设transform和input是字符串：

 StringWriter sw = new StringWriter(); using (XmlReader xrt = XmlReader.Create(new StringReader(transform)) using (XmlReader xri = XmlReader.Create(new StringReader(input)) using (XmlWriter xwo = XmlWriter.Create(sw)) { XslCompiledTransform xslt = new XslCompiledTransform(); xslt.Load(xrt); xslt.Transform(xri, xwo); } string output = sw.ToString(); 

Answer 3

您可以从StringReader或MemoryStream中获取 XmlReader.Create（） 。 XslCompileTransfrom可以从XmlReader中加载（） 。

Answer 4

编辑：添加了使用块

 // input-xml string xmlinput = String.Empty; // xslt string xsltinput = String.Empty; // output-xml string xmloutput = String.Empty; // Prepare input-xml XPathDocument doc = new XPathDocument(new StringReader(xmlinput)); // Prepare XSLT XslTransform xslt = new XslTransform(); // Creates a XmlReader from your xsl string using (XmlReader xmlreader = XmlReader.Create(new StringReader(xsltinput))) { //Load the stylesheet. xslt.Load(xmlreader); // transform using (StringWriter sw = new StringWriter()) { xslt.Transform(doc, null, sw); // save to string xmloutput = sw.ToString(); } } 

Answer 5

我发送xml内容然后加载XSLT文档，应用转换然后返回新的xml。

 public static string Transform(string xmlString) { string output = String.Empty; try { // Load an XML string into the XPathDocument. StringReader rdr = new StringReader(xmlString); XPathDocument myXPathDoc = new XPathDocument(rdr); var myXslTrans = new XslTransform(); //load the Xsl myXslTrans.Load("XSLTFile.xslt"); //create the output stream StringWriter sw = new StringWriter(); XmlWriter xwo = XmlWriter.Create(sw); //do the actual transform of Xml myXslTrans.Transform(myXPathDoc, null, xwo); output = sw.ToString(); xwo.Close(); return output; } catch (Exception e) { Console.WriteLine("Exception: {0}", e.ToString()); throw; } } 

注意：“XSLTFile.xslt”将其添加到解决方案中，并将属性“复制到输出目录”设置为“始终复制”。

Answer 6

受Robert Rossney的回答启发的VB.Net版本：

 Private Function TransformXML(XMLPath As String, XSLPath As String) As String Dim XSLT As XslCompiledTransform = New XslCompiledTransform() Dim sWriter As StringWriter = New StringWriter Dim xReader As XmlReader = XmlReader.Create(XMLPath) Using xWriter As XmlWriter = XmlWriter.Create(sWriter) XSLT.Load(XSLPath) XSLT.Transform(xReader, xWriter) End Using Return sWriter.ToString End Function 

Answer 7

我会使用XmlReader.Create(DatabaseBlobStream)和XmlWriter.Create(StringBuilder)重载。 使用以下DatabaseBlobStream对象

DatabaseBlobStream.cs

 internal class DatabaseBlobStream : Stream { private readonly IDataReader reader; private readonly int columnIndex; private long streamPosition; internal DatabaseBlobStream(IDataReader reader, int columnIndex) { this.reader = reader; this.columnIndex = columnIndex; } public override bool CanRead { get { return reader.GetFieldType(columnIndex) == typeof (byte[]) && !reader.IsDBNull(columnIndex); } } public override bool CanSeek { get { return false; } } public override bool CanWrite { get { return false; } } public override void Flush() { throw new Exception("This stream does not support writing."); } public override long Length { get { throw new Exception("This stream does not support the Length property."); } } public override long Position { get { return streamPosition; } set { streamPosition = value; } } public override int Read(byte[] buffer, int offset, int count) { if (reader.IsDBNull(columnIndex)) return 0; int bytesRead = (int)reader.GetBytes(columnIndex, streamPosition + offset, buffer, 0, count); streamPosition += bytesRead; return bytesRead; } public override long Seek(long offset, SeekOrigin origin) { throw new Exception("This stream does not support seeking."); } public override void SetLength(long value) { throw new Exception("This stream does not support setting the Length."); } public override void Write(byte[] buffer, int offset, int count) { throw new Exception("This stream does not support writing."); } public override void Close() { try { reader.Close(); } finally { base.Close(); } } protected override void Dispose(bool disposing) { try { reader.Dispose(); } finally { base.Dispose(disposing); } } }