.net对xml读写

最新推荐文章于 2025-04-02 13:39:17 发布

YANGZHONGBAO411

最新推荐文章于 2025-04-02 13:39:17 发布

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分类专栏： .net 文章标签： xml .net string encoding output class

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本文介绍了一个使用C#实现的地图应用程序，该程序能够从Google Maps API获取地理位置数据，并通过XML文件来保存和读取地标信息。

xml文件

<?xml version="1.0" encoding="utf-8"?>
<list>
<item>
    <name><![CDATA[大成社区卫生服务中心]]></name>
    <x><![CDATA[45.763361631360595]]></x>
    <y><![CDATA[126.66815757751465]]></y>
</item>
<item>
    <name><![CDATA[先锋社区卫生服务中心]]></name>
    <x><![CDATA[45.7648435797127]]></x>
    <y><![CDATA[126.67444467544555]]></y>
</item>

</list>

C#中后台代码

using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Net; using System.IO; using System.Xml; public partial class GoogleMap_Map : System.Web.UI.Page { protected string mapName = ""; protected string mapAreaX = ""; protected string mapAreaY = ""; protected void Page_Load(object sender, EventArgs e) { string address = "哈尔滨市南岗区"; string output = "csv"; string key = "ABQIAAAAXitC6yREC7A_5d5rzWd2WRT2yXp_ZAY8_ufC3CFXhHIE1NvwkxRNbLLBGwZQV2smqnezM8aBlk9s0w"; string url = string.Format("http://maps.google.com/maps/geo?q={0}&output={1}&key={2}", address, output, key); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); HttpWebResponse response = (HttpWebResponse)request.GetResponse(); StreamReader sr = new StreamReader(response.GetResponseStream()); // 解析 200,8,25.033408,121.564099 (HTTP status code, accuracy, latitude, longitude) string[] tmpArray = sr.ReadToEnd().Split(','); string latitude = tmpArray[2]; string longitude = tmpArray[3]; Response.Write(string.Format("緯度: {0}, 經度: {1}", latitude, longitude)); initPage(); } #region 读写xml public void initPage() { AreaList myArea = new AreaList(Server.MapPath("App_Data//")); if (Request["type"] == "savearea") { Response.ContentType = "text/xml"; Response.ContentEncoding = System.Text.Encoding.UTF8; //保存地标 string strName = Request["name"]; string strAreaX = Request["x"]; string strAreaY = Request["y"]; myArea.AppendNew(strName, strAreaX, strAreaY); WriteResult(Request["name"]); Response.End(); } System.Xml.XmlNodeList myNodes = myArea.GetAreaList(); for (int i = 0; i < myNodes.Count; i++) { if (i > 0) { mapName += ","; mapAreaX += ","; mapAreaY += ","; } mapName += "'" + myNodes[i].SelectSingleNode("name").InnerText + "'"; mapAreaX += "'" + myNodes[i].SelectSingleNode("x").InnerText + "'"; mapAreaY += "'" + myNodes[i].SelectSingleNode("y").InnerText + "'"; } } private void WriteResult(string strValue) { string strContent = "<?xml version=/"1.0/" encoding=/"utf-8/"?>"; strContent += "<result>" + strValue + "</result>"; Response.Write(strContent); Response.End(); } #endregion } #region 读写xml /// <summary> /// AreaList 的摘要说明 /// </summary> public class AreaList { XmlDocument xmlControl = new XmlDocument(); string strFileName = "MapArea.xml"; public AreaList(string appPath) { strFileName = appPath + strFileName; if (!System.IO.File.Exists(strFileName)) { CreateAreaListFile(); } xmlControl.Load(strFileName); } private void CreateAreaListFile() { xmlControl.LoadXml("<?xml version=/"1.0/" encoding=/"utf-8/" ?><list></list>"); xmlControl.Save(strFileName); } public void AppendNew(string strName, string strX, string strY) { XmlNode xmlNodeLast = xmlControl.SelectSingleNode("//list"); string strXml = "<name>" + makeCDATA(strName) + "</name><x>" + makeCDATA(strX) + "</x><y>" + makeCDATA(strY) + "</y>"; XmlNode xmlNode = xmlControl.CreateNode(XmlNodeType.Element, "item", ""); xmlNode.InnerXml = strXml; xmlNodeLast.AppendChild(xmlNode); xmlControl.Save(strFileName); } /// <summary> /// 取得旧的列表 /// name,area /// 地标名,坐标 /// </summary> /// <returns></returns> public System.Xml.XmlNodeList GetAreaList() { System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument(); xmlDoc.Load(strFileName); System.Xml.XmlNodeList myNodes = xmlDoc.SelectNodes("//list//item"); return myNodes; } private string makeCDATA(string strValue) { return "<![CDATA[" + strValue + "]]>"; } #endregion }