Winform中对自定义xml配置文件进行Xml节点的添加与删除

待我称王封你为后i 2024-04-18 08:40 68阅读 0赞

## 场景 ##

Winform中自定义xml配置文件后对节点进行读取与写入：

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/100532137][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100532137]

在上面已经对xml配置文件对节点能进行读取与写入之后 ，实现对节点元素的

添加与删除。

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xml配置文件如下

<?xml version="1.0" encoding="utf-8" ?>
    <Configure>
        
        <YAxis>
            
            <YAxi>
                <no>1</no>
                <title>温度</title>
                <color>black</color>
                <min>-1500</min>
                <max>1500</max>
            </YAxi>
            
            <YAxi>
                <no>2</no>
                <title>电压</title>
                <color>black</color>
                <min>-1500</min>
                <max>1500</max>
            </YAxi>
        </YAxis>
      
    </Configure>

## 实现 ##

### 添加节点 ###

在工具类中新增方法

public static void addNode()
            {
                //获取可执行文件的路径-即bin目录下的debug或者release目录
                string context = System.Windows.Forms.Application.StartupPath;
                string path = String.Concat(context, @"\config\YAxisSet.xml");
                XmlDocument xml = new XmlDocument();
                //打开一个xml
                try
                {
                    xml.Load(path);
                    //选择匹配 XPath 表达式的第一个 XmlNode
                    XmlNode Configure = xml.SelectSingleNode("Configure/YAxis");
                    //读取节点数据
                    if (Configure != null)
                    {
                        XmlNode yaxi = xml.CreateNode(XmlNodeType.Element, "YAxi", null);
                        //创建No节点
                        XmlNode no = xml.CreateNode(XmlNodeType.Element, "YAxi", null);
                        no.InnerText = "3";
                        yaxi.AppendChild(no);
                        //创建title节点
                        XmlNode title = xml.CreateNode(XmlNodeType.Element, "title", null);
                        title.InnerText = "badao";
                        yaxi.AppendChild(title);
                        //创建color节点
                        XmlNode color = xml.CreateNode(XmlNodeType.Element, "color", null);
                        color.InnerText = "red";
                        yaxi.AppendChild(color);
                        //创建min节点
                        XmlNode min = xml.CreateNode(XmlNodeType.Element, "min", null);
                        min.InnerText = "-1600";
                        yaxi.AppendChild(min);
                        //创建max节点
                        XmlNode max = xml.CreateNode(XmlNodeType.Element, "max", null);
                        max.InnerText = "1600";
                        yaxi.AppendChild(max);
                        //将yaxi追加到YAxis
                        Configure.AppendChild(yaxi);
                        XmlNodeList nodelist = xml.SelectNodes("Configure/YAxis/YAxi");
                        xml.Save(path);
                        MessageBox.Show("nodelist[0]是：" + nodelist[0].ChildNodes[1].InnerText);
                        MessageBox.Show("nodelist[1]是：" + nodelist[1].ChildNodes[1].InnerText);
                        MessageBox.Show("nodelist[2]是：" + nodelist[2].ChildNodes[1].InnerText);
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }

注：

主要通过XmlDocument.CreateNode来创建节点。

第一个参数是节点类型，Element代表是节点。

第二个参数Name属性。

第三个参数是命名空间，这里为null

以上效果就是完整的添加了一条Y轴以及相关属性。

然后新建一个按钮，在点击事件中调用工具类中的方法。

private void simpleButton3_Click(object sender, EventArgs e)
            {
                ConfigAccessUtils.addNode();
            }

### 效果 ###

添加之前

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

点击添加按钮后

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

添加之后

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 2][]

### 删除节点 ###

工具类中新建方法

public static void removeNode()
            {
                //获取可执行文件的路径-即bin目录下的debug或者release目录
                string context = System.Windows.Forms.Application.StartupPath;
                string path = String.Concat(context, @"\config\YAxisSet.xml");
                XmlDocument xml = new XmlDocument();
                //打开一个xml
                try
                {
                    xml.Load(path);
                    //选择匹配 XPath 表达式的第一个 XmlNode
                    XmlNode Configure = xml.SelectSingleNode("Configure/YAxis");
                    //读取节点数据
                    if (Configure != null)
                    {
                        XmlNodeList nodelist = xml.SelectNodes("Configure/YAxis/YAxi");
                        MessageBox.Show("删除之前count是：" + nodelist.Count);
                        //将第三个节点删除
                        Configure.RemoveChild(Configure.ChildNodes[2]);
                        nodelist = xml.SelectNodes("Configure/YAxis/YAxi");
                        xml.Save(path);
                        MessageBox.Show("删除之后count是：" + nodelist.Count);
                       
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }

注：

是通过XmlNode.RemoveChild(XmlNode)来实现删除子节点的。

SelectNodes可以获得所有配置的节点。

### 效果 ###

删除之前

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 3][]

删除之后

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 4][]

[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100532137]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100532137
[https_space.bilibili.com_164396311]: https://space.bilibili.com/164396311
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/313b6ce77ba24292b70ff4dec92961f2.jpg
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/161741c361394ccc8c4ed13494daf822.jpg
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 3]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/9515c21a00e74bb58d07c4036491c1a1.jpg
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 4]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/a7088e005179410a9815992286e548fc.jpg