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C# XML文件操作之相機參數(shù)保存和讀取

更新時間：2022年11月06日 10:14:03 作者：MechMaster

XML是可擴展標(biāo)記語言是一種數(shù)據(jù)語言，它將數(shù)據(jù)以一種簡單的文本格式存儲，可以被人類和幾乎任何計算機理解。本文將利用C#實現(xiàn)相機參數(shù)讀取并保存至XML文件，感興趣的可以學(xué)習(xí)一下

1. XML基礎(chǔ)

XML是可擴展標(biāo)記語言（Extensible Markup Language,XML)是一種數(shù)據(jù)語言，它將數(shù)據(jù)以一種簡單的文本格式存儲，可以被人類和幾乎任何計算機理解。Microsoft在.Net Framework和其他微軟產(chǎn)品中已經(jīng)完全采用它。

XML的基本格式：

<book>
    <title>Beginning Visual C# 7</title>
    <author>Benjamin Perkins et al</author>
    <code>458685</code>
</book>

2. XML基本操作

C#操作XML方法詳解

3. 相機參數(shù)保存和讀取

創(chuàng)建一個相機參數(shù)XML文件保存和讀取的類CameraXML

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace xmlTest
{
    class Camera
    {
        public string camID;
        public int camExposure;
        public int camGain;

        public Camera()
        {
            camID = "nullID";
            camExposure = 5000;
            camGain = 0;
        }

        public Camera(string camID, int camExposure, int camGain)
        {
            this.camID = camID;
            this.camExposure = camExposure;
            this.camGain = camGain;
        }
    }

    class CameraXML
    {
        /// <summary>
        /// 創(chuàng)建相機XML文件
        /// </summary>
        /// <param name="xmlFilePath">存儲路徑</param>
        /// <param name="cameraList">相機列表</param>
        public static void GenerateCameraXMLFile(string xmlFilePath, List<Camera> cameraList)
        {
            try
            {
                //初始化一個xml實例
                XmlDocument myXmlDoc = new XmlDocument();
                //創(chuàng)建xml的根節(jié)點
                XmlElement rootElement = myXmlDoc.CreateElement("Cameras");
                //將根節(jié)點加入到xml文件中（AppendChild）
                myXmlDoc.AppendChild(rootElement);

                foreach (var item in cameraList)
                {
                    //初始化第一層的第一個子節(jié)點
                    XmlElement firstLevelElement1 = myXmlDoc.CreateElement("Camera");
                    //填充第一層的第一個子節(jié)點的屬性值（SetAttribute）
                    firstLevelElement1.SetAttribute("ID", item.camID);
                    //將第一層的第一個子節(jié)點加入到根節(jié)點下
                    rootElement.AppendChild(firstLevelElement1);
                    //初始化第二層的第一個子節(jié)點
                    XmlElement secondLevelElement11 = myXmlDoc.CreateElement("Exposure");
                    //填充第二層的第一個子節(jié)點的值（InnerText）
                    secondLevelElement11.InnerText = item.camExposure.ToString();
                    firstLevelElement1.AppendChild(secondLevelElement11);
                    XmlElement secondLevelElement12 = myXmlDoc.CreateElement("Gain");
                    secondLevelElement12.InnerText = item.camGain.ToString();
                    firstLevelElement1.AppendChild(secondLevelElement12);

                }
                //將xml文件保存到指定的路徑下
                myXmlDoc.Save(xmlFilePath);

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

        public static void ReadCameraXMLFile(string xmlFilePath, out List<Camera> cameraList)
        {
            cameraList = new List<Camera>();

            //初始化一個xml實例
            XmlDocument myXmlDoc = new XmlDocument();
            //加載xml文件（參數(shù)為xml文件的路徑）
            myXmlDoc.Load(xmlFilePath);
            //獲得第一個匹配的節(jié)點（SelectSingleNode）：此xml文件的根節(jié)點
            XmlNode rootNode = myXmlDoc.SelectSingleNode("Cameras");
            //分別獲得該節(jié)點的InnerXml和OuterXml信息
            string innerXmlInfo = rootNode.InnerXml.ToString();
            string outerXmlInfo = rootNode.OuterXml.ToString();
            //獲得該節(jié)點的子節(jié)點（即：該節(jié)點的第一層子節(jié)點）
            XmlNodeList firstLevelNodeList = rootNode.ChildNodes;

            try
            {
                foreach (XmlNode node in firstLevelNodeList)
                {
                    Camera camera = new Camera();
                    //獲得該節(jié)點的屬性集合
                    XmlAttributeCollection attributeCol = node.Attributes;
                    foreach (XmlAttribute attri in attributeCol)
                    {
                        //獲取屬性名稱與屬性值
                        string name = attri.Name;
                        string value = attri.Value;
                        camera.camID = value;//相機ID
                    }

                    //判斷此節(jié)點是否還有子節(jié)點
                    if (node.HasChildNodes)
                    {
                        //獲取該節(jié)點的第一個子節(jié)點
                        XmlNode secondLevelNode1 = node.FirstChild;
                        //獲取該節(jié)點的名字
                        string name = secondLevelNode1.Name;
                        //獲取該節(jié)點的值（即：InnerText）
                        string innerText = secondLevelNode1.InnerText;
                        camera.camExposure = Convert.ToInt16(innerText);//相機曝光

                        //獲取該節(jié)點的第二個子節(jié)點（用數(shù)組下標(biāo)獲?。?
                        XmlNode secondLevelNode2 = node.ChildNodes[1];
                        name = secondLevelNode2.Name;
                        innerText = secondLevelNode2.InnerText;
                        camera.camGain = Convert.ToInt16(innerText);//相機增益
                    }

                    cameraList.Add(camera);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }

    }
}

在winform中使用這個類

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml;//引入命名空間

namespace xmlTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void buttonGenerateCameraXMLFile_Click(object sender, EventArgs e)
        {
            List<Camera> cameraList = new List<Camera>();
            Camera camera;
            camera = new Camera("L102314123", 4500, 0);
            cameraList.Add(camera);
            camera = new Camera("L102314124", 5500, 0);
            cameraList.Add(camera);
            camera = new Camera("L102314125", 3500, 1);
            cameraList.Add(camera);
            camera = new Camera("L102314126", 6500, 0);
            cameraList.Add(camera);
            camera = new Camera("L102314127", 4880, 0);
            cameraList.Add(camera);
            camera = new Camera("L102314128", 9500, 0);
            cameraList.Add(camera);
            camera = new Camera("L102314129", 4530, 0);
            cameraList.Add(camera);
            camera = new Camera("L102314130", 13200, 0);
            cameraList.Add(camera);

            CameraXML.GenerateCameraXMLFile("D:\\Cameras.xml", cameraList);
        }

        private void buttonReadCameraXMLFile_Click(object sender, EventArgs e)
        {
            List<Camera> cameraList = new List<Camera>();
            CameraXML.ReadCameraXMLFile("D:\\Cameras.xml", out cameraList);

            foreach (var item in cameraList)
            {
                listBox1.Items.Add("ID:" + item.camID);
                listBox1.Items.Add("Exposure:" + item.camExposure);
                listBox1.Items.Add("Gain:" + item.camGain);
            }
        }
    }
}