如何在創建XML文件時添加一個名稱空間？

Question

我必須在C＃中創建一個XML文檔。

根元素必須是這樣的：

<valuation-request 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:noNamespaceSchemaLocation="valuations.xsd"> 

我使用以下

XmlElement root = X.CreateElement("valuation-request"); 
root.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance"); 
root.SetAttribute("xsi:noNamespaceSchemaLocation", "valuations.xsd"); 

然而，這會產生

<valuation-request 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    noNamespaceSchemaLocation="valuations.xsd"> //missing the xsi: 

我缺少什麼？

Answer 1

使用的SetAttribute過載，這需要命名空間以及：

root.SetAttribute("noNamespaceSchemaLocation", 
    "http://www.w3.org/2001/XMLSchema-instance", 
    "valuations.xsd" 
); 

Answer 2

與作家添加這​​樣的：

var writerSettings = new XmlWriterSettings 
     { 
      Indent = true, 
      IndentChars = " ", 
      NewLineChars = Environment.NewLine, 
      NewLineHandling = NewLineHandling.Replace, 
      Encoding = new UTF8Encoding(false) 
     }; 

XmlWriter writer = XmlWriter.Create("C:\test.xml", writerSettings); 
writer.WriteStartDocument(false); 
writer.WriteStartElement("valuation-request"); 
writer.WriteAttributeString("xmlns", "xsi", null, "http://www.w3.org/2001/XMLSchema-instance"); 
writer.WriteAttributeString("xsi", "noNamespaceSchemaLocation", null, "http://www.gzs.si/e-poslovanje/sheme/eSLOG_1-5_EnostavniRacun.xsd"); 

Answer 3

最近，我也遇到過同樣的問題。要解決這個問題，我只是添加如下一行：

XmlAttribute noNamespaceSchemaLocationAttr = xmlDoc.CreateAttribute("xsi", "noNamespaceSchemaLocation", "http://www.w3.org/2001/XMLSchema-instance");