C#讀寫XML文檔



C#讀取XML文檔

使用XMLDocument對象，可以很方便的讀取XML文檔，C#中對XML的操作進行的封裝，相比較於C++，則要方便很多。

下面是樣例XML文檔：

 

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!--This is a continent file to contain all continent in our world-->
<Root>
  <Continents>
    <Continent ID="101" Name="Asia" />
    <Continent ID="102" Name="Africa" />
    <Continent ID="103" Name="North America" />
    <Continent ID="104" Name="South America" />
    <Continent ID="105" Name="Europe" />
    <Continent ID="106" Name="Oceania" />
    <Continent ID="107" Name="Antarctica" />
  </Continents>
</Root>

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!--This is a continent file to contain all continent in our world-->
<Root>
  <Continents>
    <Continent ID="101" Name="Asia" />
    <Continent ID="102" Name="Africa" />
    <Continent ID="103" Name="North America" />
    <Continent ID="104" Name="South America" />
    <Continent ID="105" Name="Europe" />
    <Continent ID="106" Name="Oceania" />
    <Continent ID="107" Name="Antarctica" />
  </Continents>
</Root>

讀取該文檔的樣例代碼如下：

string strFilePathName = strFilePath + "\\Continent.xml";
List<Continent> data = new List<Continent>();
Console.WriteLine("The data is parsed from file :" + strFilePathName);

try
{
    XmlDocument xmlDoc = new XmlDocument();
    xmlDoc.Load(strFilePathName);

    XmlNode xmlNode = xmlDoc.SelectSingleNode("Root");
    if (xmlNode == null)
    {
        Console.WriteLine("Invalid file format!");
        return;
    }

    XmlNode continentNode = xmlNode.FirstChild;
    foreach (XmlNode node in continentNode.ChildNodes)
    {
        uint uiID = uint.Parse(node.Attributes["ID"].Value);
        string strName = node.Attributes["Name"].Value;

        data.Add(new Continent(uiID, strName));
    }

}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
}

Console.WriteLine("Parsed OK, result:");

foreach (Continent info in data)
{
    Console.WriteLine("ID= " + info.ID + ", Name = " + info.Name);
}

            string strFilePathName = strFilePath + "\\Continent.xml";
            List<Continent> data = new List<Continent>();
            Console.WriteLine("The data is parsed from file :" + strFilePathName);

            try
            {
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(strFilePathName);

                XmlNode xmlNode = xmlDoc.SelectSingleNode("Root");
                if (xmlNode == null)
                {
                    Console.WriteLine("Invalid file format!");
                    return;
                }

                XmlNode continentNode = xmlNode.FirstChild;
                foreach (XmlNode node in continentNode.ChildNodes)
                {
                    uint uiID = uint.Parse(node.Attributes["ID"].Value);
                    string strName = node.Attributes["Name"].Value;

                    data.Add(new Continent(uiID, strName));
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

            Console.WriteLine("Parsed OK, result:");

            foreach (Continent info in data)
            {
                Console.WriteLine("ID= " + info.ID + ", Name = " + info.Name);
            }

C# 寫XML文檔

C#寫XMl文檔也比較簡單，首先使用XMLDocument對象創建XML文檔，然後寫入XMLWriter流，進行flush就行了。

下面是樣例代碼：

string strFilePathName = strFilePath + "\\Continent.xml";

// write
// Asia, Africa, North America, South America,Europe, Oceania, Antarctica
List<Continent> data = new List<Continent>();
uint uiIDBegin = 101;
data.Add(new Continent(uiIDBegin++, "Asia"));
data.Add(new Continent(uiIDBegin++, "Africa"));
data.Add(new Continent(uiIDBegin++, "North America"));
data.Add(new Continent(uiIDBegin++, "South America"));
data.Add(new Continent(uiIDBegin++, "Europe"));
data.Add(new Continent(uiIDBegin++, "Oceania"));
data.Add(new Continent(uiIDBegin++, "Antarctica"));

foreach (Continent info in data)
{
    Console.WriteLine("ID= " + info.ID + ", Name = " + info.Name);
}

Console.WriteLine("The data will write to file :" + strFilePathName);

try
{
    XmlDocument xmlDoc = new XmlDocument();
    XmlDeclaration xmlDec = xmlDoc.CreateXmlDeclaration("1.0", "UTF-8", "yes");
    XmlComment xmlComment = xmlDoc.CreateComment("This is a continent file to contain all continent in our world");
    XmlElement xmlRoot = xmlDoc.CreateElement("Root");
    XmlElement xmlContinents = xmlDoc.CreateElement("Continents");
    xmlRoot.AppendChild(xmlContinents);

    foreach (Continent info in data)
    {
        XmlElement xmlContinent = xmlDoc.CreateElement("Continent");
        xmlContinents.AppendChild(xmlContinent);
        xmlContinent.SetAttribute("ID", info.ID.ToString());
        xmlContinent.SetAttribute("Name", info.Name);
    }

    xmlDoc.AppendChild(xmlDec);
    xmlDoc.AppendChild(xmlComment);
    xmlDoc.AppendChild(xmlRoot);


    XmlWriterSettings wrSettings = new XmlWriterSettings();
    wrSettings.Indent = true;
    wrSettings.Encoding = UnicodeEncoding.UTF8;
    XmlWriter xmlWr = XmlWriter.Create(strFilePathName, wrSettings);
    xmlDoc.WriteTo(xmlWr);
    xmlWr.Flush();

    Console.WriteLine("Create OK, file name = " + strFilePathName);
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
}

            string strFilePathName = strFilePath + "\\Continent.xml";

            // write
            // Asia, Africa, North America, South America,Europe, Oceania, Antarctica
            List<Continent> data = new List<Continent>();
            uint uiIDBegin = 101;
            data.Add(new Continent(uiIDBegin++, "Asia"));
            data.Add(new Continent(uiIDBegin++, "Africa"));
            data.Add(new Continent(uiIDBegin++, "North America"));
            data.Add(new Continent(uiIDBegin++, "South America"));
            data.Add(new Continent(uiIDBegin++, "Europe"));
            data.Add(new Continent(uiIDBegin++, "Oceania"));
            data.Add(new Continent(uiIDBegin++, "Antarctica"));

            foreach (Continent info in data)
            {
                Console.WriteLine("ID= " + info.ID + ", Name = " + info.Name);
            }

            Console.WriteLine("The data will write to file :" + strFilePathName);

            try
            {
                XmlDocument xmlDoc = new XmlDocument();
                XmlDeclaration xmlDec = xmlDoc.CreateXmlDeclaration("1.0", "UTF-8", "yes");
                XmlComment xmlComment = xmlDoc.CreateComment("This is a continent file to contain all continent in our world");
                XmlElement xmlRoot = xmlDoc.CreateElement("Root");
                XmlElement xmlContinents = xmlDoc.CreateElement("Continents");
                xmlRoot.AppendChild(xmlContinents);

                foreach (Continent info in data)
                {
                    XmlElement xmlContinent = xmlDoc.CreateElement("Continent");
                    xmlContinents.AppendChild(xmlContinent);
                    xmlContinent.SetAttribute("ID", info.ID.ToString());
                    xmlContinent.SetAttribute("Name", info.Name);
                }

                xmlDoc.AppendChild(xmlDec);
                xmlDoc.AppendChild(xmlComment);
                xmlDoc.AppendChild(xmlRoot);


                XmlWriterSettings wrSettings = new XmlWriterSettings();
                wrSettings.Indent = true;
                wrSettings.Encoding = UnicodeEncoding.UTF8;
                XmlWriter xmlWr = XmlWriter.Create(strFilePathName, wrSettings);
                xmlDoc.WriteTo(xmlWr);
                xmlWr.Flush();

                Console.WriteLine("Create OK, file name = " + strFilePathName);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

 

後記：

這裏僅僅是個簡單的例子，以備往後複製黏貼之用，呵呵！