XML整形以及改行字符串输出

XML整形

估计如下一样使用XDocument的人比较多，毕竟也是微软推荐使用的。

        string FormatXml(string Xml)

        {

            try

            {

                XDocument doc = XDocument.Parse(Xml);

                return doc.ToString();

            }

            catch (Exception)

            {

                return Xml;

            }

        }

当出现如下文档（默认命名空间，前缀命名空间都定义）时，以上方法返回的值格式变了：

<?xml version="1.0"?>

<?mso-application progid="Excel.Sheet"?>

<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"

 xmlns:o="urn:schemas-microsoft-com:office:office"

 xmlns:x="urn:schemas-microsoft-com:office:excel"

 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"

 xmlns:html="http://www.w3.org/TR/REC-html40">

 <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">

  <Created>2015-06-05T18:19:34Z</Created>

  <LastSaved>2015-06-05T18:19:39Z</LastSaved>

  <Version>16.00</Version>

 </DocumentProperties>

 <OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">

  <AllowPNG/>

  <RemovePersonalInformation/>

 </OfficeDocumentSettings>

 <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">

  <WindowHeight>12645</WindowHeight>

  <WindowWidth>22260</WindowWidth>

  <WindowTopX>1170</WindowTopX>

  <WindowTopY>0</WindowTopY>

  <ProtectStructure>False</ProtectStructure>

  <ProtectWindows>False</ProtectWindows>

 </ExcelWorkbook>

 <Styles>

  <Style ss:ID="Default" ss:Name="Normal">

   <Alignment ss:Vertical="Bottom"/>

   <Borders/>

   <Font ss:FontName="游ゴシック" x:CharSet="128" x:Family="Modern" ss:Size="11"

    ss:Color="#000000"/>

   <Interior/>

   <NumberFormat/>

   <Protection/>

  </Style>

 </Styles>

 <Worksheet ss:Name="Sheet1">

  <Table ss:ExpandedColumnCount="1" ss:ExpandedRowCount="1" x:FullColumns="1"

   x:FullRows="1" ss:DefaultColumnWidth="54" ss:DefaultRowHeight="18.75">

  </Table>

  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">

   <PageSetup>

    <Header x:Margin="0.3"/>

    <Footer x:Margin="0.3"/>

    <PageMargins x:Bottom="0.75" x:Left="0.7" x:Right="0.7" x:Top="0.75"/>

   </PageSetup>

   <Print>

    <ValidPrinterInfo/>

    <PaperSizeIndex>9</PaperSizeIndex>

    <HorizontalResolution>600</HorizontalResolution>

    <VerticalResolution>600</VerticalResolution>

   </Print>

   <Selected/>

   <ProtectObjects>False</ProtectObjects>

   <ProtectScenarios>False</ProtectScenarios>

  </WorksheetOptions>

 </Worksheet>

</Workbook>

XDocument整形之后，前缀显示自动加上了：

<?xml version="1.0" encoding="utf-8"?>

<?mso-application progid="Excel.Sheet"?>

<ss:Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:html="http://www.w3.org/TR/REC-html40">

  <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">

    <Created>2015-06-05T18:19:34Z</Created>

    <LastSaved>2015-06-05T18:19:39Z</LastSaved>

    <Version>16.00</Version>

  </DocumentProperties>

  <OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">

    <AllowPNG />

    <RemovePersonalInformation />

  </OfficeDocumentSettings>

  <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">

    <WindowHeight>12645</WindowHeight>

    <WindowWidth>22260</WindowWidth>

    <WindowTopX>1170</WindowTopX>

    <WindowTopY>0</WindowTopY>

    <ProtectStructure>False</ProtectStructure>

    <ProtectWindows>False</ProtectWindows>

  </ExcelWorkbook>

  <ss:Styles>

    <ss:Style ss:ID="Default" ss:Name="Normal">

      <ss:Alignment ss:Vertical="Bottom" />

      <ss:Borders />

      <ss:Font ss:FontName="游ゴシック" x:CharSet="128" x:Family="Modern" ss:Size="11" ss:Color="#000000" />

      <ss:Interior />

      <ss:NumberFormat />

      <ss:Protection />

    </ss:Style>

  </ss:Styles>

  <ss:Worksheet ss:Name="Sheet1">

    <ss:Table ss:ExpandedColumnCount="1" ss:ExpandedRowCount="1" x:FullColumns="1" x:FullRows="1" ss:DefaultColumnWidth="54" ss:DefaultRowHeight="18.75"></ss:Table>

    <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">

      <PageSetup>

        <Header x:Margin="0.3" />

        <Footer x:Margin="0.3" />

        <PageMargins x:Bottom="0.75" x:Left="0.7" x:Right="0.7" x:Top="0.75" />

      </PageSetup>

      <Print>

        <ValidPrinterInfo />

        <PaperSizeIndex>9</PaperSizeIndex>

        <HorizontalResolution>600</HorizontalResolution>

        <VerticalResolution>600</VerticalResolution>

      </Print>

      <Selected />

      <ProtectObjects>False</ProtectObjects>

      <ProtectScenarios>False</ProtectScenarios>

    </WorksheetOptions>

  </ss:Worksheet>

</ss:Workbook>

解决办法:使用XmlDocument

        static string FormatXml(string xml)

        {

            try

            {

                var doc = new XmlDocument();

                doc.LoadXml(xml);

                StringBuilder output = new StringBuilder();

                XmlWriterSettings settings = new XmlWriterSettings

                {

                    Indent = true,

                    Async = true

                };

                using (XmlWriter writer = XmlWriter.Create(output, settings))

                {

                    doc.Save(writer);

                }

                return output.ToString();

            }

            catch (Exception)

            {

                return xml;

            }

        }

整形之后保持原样：

<?xml version="1.0" encoding="utf-16"?>

<?mso-application progid="Excel.Sheet"?>

<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:html="http://www.w3.org/TR/REC-html40">

  <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">

    <Created>2015-06-05T18:19:34Z</Created>

    <LastSaved>2015-06-05T18:19:39Z</LastSaved>

    <Version>16.00</Version>

  </DocumentProperties>

  <OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">

    <AllowPNG />

    <RemovePersonalInformation />

  </OfficeDocumentSettings>

  <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">

    <WindowHeight>12645</WindowHeight>

    <WindowWidth>22260</WindowWidth>

    <WindowTopX>1170</WindowTopX>

    <WindowTopY>0</WindowTopY>

    <ProtectStructure>False</ProtectStructure>

    <ProtectWindows>False</ProtectWindows>

  </ExcelWorkbook>

  <Styles>

    <Style ss:ID="Default" ss:Name="Normal">

      <Alignment ss:Vertical="Bottom" />

      <Borders />

      <Font ss:FontName="游ゴシック" x:CharSet="128" x:Family="Modern" ss:Size="11" ss:Color="#000000" />

      <Interior />

      <NumberFormat />

      <Protection />

    </Style>

  </Styles>

  <Worksheet ss:Name="Sheet1">

    <Table ss:ExpandedColumnCount="1" ss:ExpandedRowCount="1" x:FullColumns="1" x:FullRows="1" ss:DefaultColumnWidth="54" ss:DefaultRowHeight="18.75"></Table>

    <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">

      <PageSetup>

        <Header x:Margin="0.3" />

        <Footer x:Margin="0.3" />

        <PageMargins x:Bottom="0.75" x:Left="0.7" x:Right="0.7" x:Top="0.75" />

      </PageSetup>

      <Print>

        <ValidPrinterInfo />

        <PaperSizeIndex>9</PaperSizeIndex>

        <HorizontalResolution>600</HorizontalResolution>

        <VerticalResolution>600</VerticalResolution>

      </Print>

      <Selected />

      <ProtectObjects>False</ProtectObjects>

      <ProtectScenarios>False</ProtectScenarios>

    </WorksheetOptions>

  </Worksheet>

</Workbook>

改行（CR+LF）问题

标签的值中如果包含\r\n换行符，XDocument以及XmlDocument读取之后会默认被转换为\n，如果就这样保存会少了\r。

而且Excel另存为的xml格式文件中的改行符为【】，很难直接复原。

如果不在意xml格式的话可以通过如下方法解决：

        static string FormatXml(string xml)

        {

            try

            {

                var doc = new XmlDocument();

                doc.LoadXml(xml);

                StringBuilder output = new StringBuilder();

                XmlWriterSettings settings = new XmlWriterSettings

                {

                    NewLineChars = "\r\n",

                    NewLineOnAttributes = true,

                    NewLineHandling = NewLineHandling.Replace,

                    CheckCharacters = false,

                    Indent = false,

                    Async = true

                };

                using (XmlWriter writer = XmlWriter.Create(output, settings))

                {

                    doc.Save(writer);

                }

                return output.ToString();

            }

            catch (Exception)

            {

                return xml;

            }

        }

巴特西

XML整形以及改行字符串输出

XML整形

改行（CR+LF）问题

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