【C#】文件读取 -- .xml文件读取

.xml文件读取与写入

[实现效果]

[实现编程]

/// <summary>
/// 创建xml配置
/// </summary>
/// <param name="path">path ,如：x:\\xxxx\\xxx.xml</param>
private void createXmlText(string path)
{
    if (string.IsNullOrEmpty(path))
        return;
    if (File.Exists(path))
        return;
    XDocument document = new XDocument();
    XElement root = new XElement("参数");
    root.Add(new XComment("输入图像：采集算子编号"));
    root.SetElementValue("输入图像", "001");
    root.SetElementValue("X偏移", "1");
    root.SetElementValue("Y偏移", "1");
    root.Add(new XComment("结果图像：图像变量的名称"));
    root.SetElementValue("结果图像", "定位图");
    root.Save(path);
}

/// <summary>
/// 读取xml配置
/// </summary>
/// <param name="path">path ,如：x:\\xxxx\\xxx.xml</param>
/// <returns></returns>
private Config readXml(string path)
{
    if (string.IsNullOrEmpty(path))
        return null;
    if (!File.Exists(path))
        return null;
    XDocument document = XDocument.Load(path);
    XElement root = document.Root;
    //读取配置文件
    XElement inputImageNo = root.Element("输入图像");
    XElement offsetX = root.Element("X偏移");
    XElement offsetY = root.Element("Y偏移");
    XElement resultImageVariableName = root.Element("结果图像");
    //转换
    Config config = new Config();
    config.InputImageNo = inputImageNo.Value;
    config.OffsetX = XmlConvert.ToInt32(offsetX.Value == "" ? "0" : offsetX.Value);
    config.OffsetY = XmlConvert.ToInt32(offsetY.Value == "" ? "0" : offsetY.Value);
    config.ResultImageVariableName = resultImageVariableName.Value;
    return config;
}

internal class Config
{
    public string InputImageNo { get; set; }
    public int OffsetX { get; set; }
    public int OffsetY { get; set; }
    public string ResultImageVariableName { get; set; }
}

[实现编程：序列化的方式]

/// <summary>
/// 保存xml文件
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list"></param>
/// <param name="dir">文件目录，如 D:\\Config</param>
/// <param name="name">文件名称，如 config.xml</param>
public bool Save<T>(T list, string dir, string name)
{
    try
    {
        if (!Directory.Exists(dir))
            Directory.CreateDirectory(dir);
        var filePath = System.IO.Path.Combine(dir, name);
        //如果文件存在需要删除，否则会续写，造成格式错误
        if (File.Exists(filePath))
            File.Delete(filePath);
        using (System.IO.StringWriter stringWriter = new StringWriter(new StringBuilder()))
        {
            XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
            xmlSerializer.Serialize(stringWriter, list);
            FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate);
            StreamWriter sw = new StreamWriter(fs);
            sw.Write(stringWriter.ToString());
            sw.Close();
            fs.Close();
        }
    }
    catch (System.Exception ex)
    {

        return false;
    }
    return true;
}

/// <summary>
/// 读取xml文件
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="path">文件路径，如 D:\\Config\\CameraSetting.xml</param>
/// <returns></returns>
public T Read<T>(string path)
{
    if (!File.Exists(path))
        return default;
    try
    {
        using (TextReader reader = new StreamReader(path))
        {
            var serializer = new XmlSerializer(typeof(T));
            var items = (T)serializer.Deserialize(reader);
            return items;
        }
    }
    catch (System.Exception ex)
    {

    }
    return default;
}

[调用方式 示例]

string path = "D:\\Config\\CameraSetting.xml";
// 读
xxxx = Read<List<Camera>>(path);
// 存
Save(path);