標籤:margin border event 檔案的操作 bool 操作xml reac png static
針對XML檔案的操作是C#程式設計中非常常見的功能。本文即以執行個體展示了C#操作XML檔案的幾個常見的樣本。具體如下:
1.返回節點下標
public static XmlDocument getDoc(String path)//載入xml文檔{ XmlDocument doc = new XmlDocument(); doc.Load(path); return doc;}/// <summary>/// 返回找到的節點下標/// </summary>/// <param name="path">xml檔案路徑</param>/// <param name="bname">書名</param>/// <returns></returns>public static int getPosition(String path,string node, String bname){ int i; XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNodeList nodeList = doc.SelectSingleNode(node).ChildNodes; for (i = 0; i < nodeList.Count; i++) { if (nodeList[i].ChildNodes[0].InnerText == bname) { return i; } } return -1;}
2.遍曆資料
/// <summary>/// 遍曆資料/// </summary>/// <param name="sender"></param>/// <param name="e"></param>protected void btnRead_Click(object sender, EventArgs e){ XmlDocument doc = getDoc("books.xml");//載入xml文檔,books檔案存放於 foreach (XmlElement root in doc.DocumentElement.ChildNodes)//遍曆根的子節點 { Response.Write("<script>document.write(‘<br/>‘);</script>"); Response.Write("<script>document.write(‘" + root.Name + "‘);</script>");//節點名root.Name book foreach (XmlElement item in root.ChildNodes) { Response.Write("<script>document.write(‘" + item.Name + "‘+‘:‘+‘" + item.InnerText + "‘);</script>");//輸出節點名和文本節點的值 Response.Write("<script>document.write(‘<br/>‘);</script>"); } }}
3.尋找
/// <summary>/// 尋找/// </summary>/// <param name="path">檔案路徑</param>/// <param name="node">節點</param>/// <param name="bname">尋找關鍵字</param>/// <returns>XmlNode</returns>public static XmlNode Find(string path,string node,string bname){ XmlDocument doc = new XmlDocument(); doc.Load(path);//載入xml文檔 XmlNodeList nodeList = doc.SelectSingleNode(node).ChildNodes; int i = getPosition(path, node, bname);// if (i >= 0) return nodeList[i]; else return null;}
4.刪除節點
/// <summary>/// 刪除元素、屬性/// </summary>/// <param name="path">檔案</param>/// <param name="node">指定節點的父節點</param>/// <param name="attribute">為空白時刪除節點,否則刪除屬性</param>/// <param name="bname"></param>public static void Delete(string path,string node,string attribute,string bname){ XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNode root = doc.SelectSingleNode(node); XmlNodeList nodeList = doc.SelectSingleNode(node).ChildNodes; int i = getPosition(path, node, bname);//返回指定的節點下標 if (i >= 0) { if (attribute.Equals("")) { root.RemoveChild(nodeList[i]); } else { XmlElement xn = (XmlElement)nodeList[i]; xn.RemoveAttribute(attribute); } } doc.Save(path);}
5.添加
/// <summary>/// 添加元素值/// </summary>/// <param name="path"></param>/// <param name="node"></param>/// <param name="element"></param>/// <param name="value"></param>/// <param name="i">插入的下標,如果為負,預設從最後一個節點插入</param>/// <returns></returns>public static bool Add(string path,string node,string element,string value,int i){ XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNodeList nodeList = doc.SelectNodes(node); XmlNode newNode = doc.SelectSingleNode(node).LastChild; if (i < 0 || i > nodeList.Count-1)//如果小於0或者大於節點長度,預設從最後一個節點添加 { XmlElement newElement = doc.CreateElement(element);//建立元素 newElement.InnerText = value;//賦值 newNode.AppendChild(newElement); } else { XmlElement newElement = doc.CreateElement(element); newElement.InnerText = value; nodeList[i - 1].AppendChild(newElement); } doc.Save(path); return true;}
希望本文所述方法對大家的C#程式設計能有所協助。
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C#操作XML檔案執行個體匯總
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C#操作XML檔案執行個體匯總