unity編輯器xml數據庫插件
注：9月9日更新，其中MyXML.cs中有一句代碼寫錯，查找功能失誤，文中已經修改！
注：9月1日更新說明：xml存儲結構，因為在用xml之前不知道正規的xml數據結構，所以是自創的結構。雖然也能完成功能，但是據說策划配置時不方便，所以為了統一，不使用節點的方式存儲數據，
而是通過添加屬性，設置屬性的方式來存取數據。
直接上圖看的清楚些：
我之前設計的格式：
現在的格式：
關於這部分的代碼我會貼在最后。
程序和數據分離的意義我就不多說了，大家自己腦補或者百度。在使用unity開發時，數據的調試是非常頻繁和重要的。我們可以制作一個簡單的編輯器插件，將數據顯示在Inspector面板上，並進行編輯操作。這樣測試人員就可以非常方便的管理測試數據了。
需求很簡單，具體的效果是，能讀取資源內的類，將其屬性顯示在面板上，可以對此進行增刪改查的操作。如下圖所示（對象組，相當於數據庫所有的表。對象，相當於表的所有記錄）。
當需要創建一條新記錄的時候，先填上主鍵，然后點擊創建按鈕。編輯完成后點擊插入即可。
xml數據庫文件如下圖
要實現這個功能，需要的知識是，C#的反射類，unity的編輯器類，數據庫。通過反射，自動解析對象，獲取對象的成員變量名和值。Unity編輯器類沒什么好說的，就是一些組件方法的使用。考慮到跨平台等問題，我選擇xml作為存儲數據庫。編輯器內運行，存儲量不大，所以性能方面的問題也就不說了。
好，接下來說一說設計的事。首先是對象的反射。基本類型的存儲沒有問題，難點是數組的存取有點變態。我找了很多資料也不能自動創建某一類型的數組。既然不能自動，然后就使用半自動判斷了，無非是if else之類的，看看這個屬性是不是某一類型的數組。
下面是代碼。
using System;
using System.Reflection;
using UnityEngine;
using System.Collections.Generic;
using System.Runtime.InteropServices;
public class ClassAnalyze<T>
{
private string[] cols;
public string[] Cols
{
get { return cols; }
set { cols = value; }
}
private string[] values;
public string[] Values
{
get { return values; }
set { values = value; }
}
public string ClazzName
{
get { return tempClazz.GetType().Name; }
}
private PropertyInfo[] property;
private T tempClazz;
public static System.Object CreateObject(string objName) {
return Assembly.GetExecutingAssembly().CreateInstance(objName);
}
public T GetClazz(string[] values)
{//將數值賦給對象，然后再獲取
SetClazz(values);
this.Values = values;
if (tempClazz == null)
{
return default(T);
}
return tempClazz;
}
public void SetClazz(string[] values)
{//將數值賦給對象，然后再獲取
if (tempClazz != null && this.Values.Length == values.Length)
{
this.Values = values;
for (int i = 0; i < property.Length; i++)
{
if (tempClazz.GetType().GetProperty(Cols[i]).PropertyType.IsArray)
{
var tempArr = StringToArr(tempClazz.GetType().GetProperty(Cols
[i]).GetValue(tempClazz, null), values[i].Split(new char[] { '|' }));
property[i].SetValue(tempClazz, tempArr, null);
}
else
{
property[i].SetValue(tempClazz, Convert.ChangeType(values[i], property[i].PropertyType), null);
}
}
}
}
private System.Object StringToArr(System.Object arr, string[] values)
{
if (arr is string[])
{
arr = new string[values.Length];
for (int i = 0; i < values.Length; i++)
{
(arr as string[])[i] = values[i];
}
return (string[])arr;
}
else if (arr is int[])
{
arr = new int[values.Length];
for (int i = 0; i < values.Length; i++)
{
(arr as int[])[i] = int.Parse(values[i]);
}
return (int[])arr;
}
else if (arr is Single[])
{
arr = new Single[values.Length];
for (int i = 0; i < values.Length; i++)
{
(arr as Single[])[i] = Single.Parse(values[i]);
}
return (Single[])arr;
}
else if (arr is float[])
{
arr = new float[values.Length];
for (int i = 0; i < values.Length; i++)
{
(arr as float[])[i] = float.Parse(values[i]);
}
return (float[])arr;
}
else if (arr is double[])
{
arr = new double[values.Length];
for (int i = 0; i < values.Length; i++)
{
(arr as double[])[i] = double.Parse(values[i]);
}
return (double[])arr;
}
else if (arr is long[])
{
arr = new long[values.Length];
for (int i = 0; i < values.Length; i++)
{
(arr as long[])[i] = long.Parse(values[i]);
}
return (long[])arr;
}
else if (arr is System.Object[])
{
arr = new System.Object[values.Length];
for (int i = 0; i < values.Length; i++)
{
(arr as System.Object[])[i] = values[i];
}
return (System.Object[])arr;
}
return arr;
}
private string ArrToString(System.Object arr)
{
string values = "";
if (arr is System.Object[])
{
foreach (var value in arr as System.Object[])
{
values += value + "|";
}
}
else if (arr is string[])
{
foreach (var value in arr as string[])
{
values += value + "|";
}
}
else if (arr is int[])
{
foreach (var value in arr as int[])
{
values += value + "|";
}
}
else if (arr is Single[])
{
foreach (var value in arr as Single[])
{
values += value + "|";
}
}
else if (arr is float[])
{
foreach (var value in arr as float[])
{
values += value + "|";
}
}
else if (arr is double[])
{
foreach (var value in arr as double[])
{
values += value + "|";
}
}
else if (arr is long[])
{
foreach (var value in arr as long[])
{
values += value + "|";
}
}
values = values.TrimEnd(new char[] { '|' });
return values;
}
public void AnalyzeClazz()
{
if (tempClazz != null)
{
property = tempClazz.GetType().GetProperties();
Cols = new string[property.Length];
Values = new string[property.Length];
for (int i = 0; i < property.Length; i++)
{
Cols[i] = property[i].Name;
string value = "";
if (tempClazz.GetType().GetProperty(Cols[i]).PropertyType.IsArray)
{
value = ArrToString(tempClazz.GetType().GetProperty(Cols[i]).GetValue(tempClazz, null));
}
else
{
value = Convert.ToString(tempClazz.GetType().GetProperty(Cols[i]).GetValue(tempClazz, null));
}
Values[i] = value;
}
}
}
private ClassAnalyze()
{
}
public ClassAnalyze(T tempClazz)
{
this.tempClazz = tempClazz;
AnalyzeClazz();
}
public void Close()
{
tempClazz = default(T);
Cols = null;
Values = null;
property = null;
}
public System.Object GetValue(T t, string colName)
{
return tempClazz.GetType().GetProperty(colName).GetValue(tempClazz, null);
}
public void SetValue(T t, string colName,string value)
{
for (int i = 0; i < property.Length; i++) {
if (property[i].Name == colName) {
if (property[i].PropertyType.IsArray)
{
var tempArr = StringToArr(property[i].GetValue(tempClazz, null), value.Split(new char[] { '|' }));
property[i].SetValue(tempClazz, tempArr, null);
}
else {
property[i].SetValue(tempClazz, Convert.ChangeType(value, property[i].PropertyType), null);
}
break;
}
}
}
public override string ToString()
{
string values = "";
for (int i = 0; i < Cols.Length; i++)
{
values += Cols[i] + ":{" + this.Values[i] + "} ";
}
return base.ToString() + ": " + values;
}
}
反射搞定后就是設計xml數據庫了，具體的功能看個人需求。關於操作xml還是很簡單的。
using System.Xml; using System.Collections.Generic; using System.IO; using System; using UnityEngine; public abstract class DB { /*public abstract bool CheckTable(string tableName); public abstract bool CheckDB(string dBName); public abstract void CreateTable(string tableName); public abstract void CreateDB(string dBName);*/ public abstract bool Insert(string tableName, string[] cols, string[] values, string key); public abstract bool Update(string tableName, string[] cols, string[] values, string key); public abstract bool UpdateAll(string tableName); public abstract bool Delete(string tableName, string key); public abstract bool DeleteAll(string tableName); public abstract string[] Select(string tableName, string key); public abstract List<string[]> SelectAll(string tableName); public abstract void Connect(string path); public abstract void Close(); public abstract string[] SelectAllObjectsName(string tableName); } public class XmlSql : DB { //public static string values[0] = "values[0]"; private XmlDocument xmlDoc; private string path; private string rootName; public XmlSql() { xmlDoc = new XmlDocument(); } public XmlSql(string path) { xmlDoc = new XmlDocument(); Connect(path); } public override void Connect(string path) { if (xmlDoc == null) xmlDoc = new XmlDocument(); if (!CheckDB(path)) { this.path = path; rootName = path.Substring(path.LastIndexOf("/")+1,path.LastIndexOf(".")- path.LastIndexOf("/")-1); CreateDB(rootName); } else { this.path = path; xmlDoc.Load(this.path); rootName = xmlDoc.LastChild.LocalName; } } public override void Close() { if (xmlDoc != null) xmlDoc.Save(path); GC.Collect(); } public XmlNode CheckTable(string tableName) { XmlNode root = xmlDoc.SelectSingleNode(rootName); if (root.SelectSingleNode(tableName) != null) { return root.SelectSingleNode(tableName); } return CreateTable(root,tableName); } public bool CheckDB(string dBName) { return File.Exists(dBName); } public XmlNode CreateTable(XmlNode root,string tableName) { XmlNode table = xmlDoc.CreateElement(tableName); root.AppendChild(table); xmlDoc.Save(path); return table; } public XmlNode CreateDB(string dBName) { File.CreateText(path).Close(); XmlDeclaration xmlDeclaration = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null); XmlNode root = xmlDoc.CreateElement(dBName); xmlDoc.AppendChild(xmlDeclaration); xmlDoc.AppendChild(root); xmlDoc.Save(path); return root; } public override bool Insert(string tableName, string[] cols, string[] values,string key) { if (key == null || key == "") key = values[0]; key = key.Replace(" ",""); XmlNode table = CheckTable(tableName); XmlNode obj = table.SelectSingleNode(key);//按照key值確定元素對象 if (obj != null) {//待插入數據已經存在，插入失敗 return false; } XmlElement element = xmlDoc.CreateElement(key); for(int i=0;i<cols.Length;i++){ XmlElement e = xmlDoc.CreateElement(cols[i]); e.InnerText = values[i].Replace(" ", ""); element.AppendChild(e); } table.AppendChild(element); xmlDoc.Save(path); return true; } public override bool Update(string tableName, string[] cols, string[] values,string key) { if (key == null || key == "") key = values[0]; key = key.Replace(" ", ""); XmlNode table = CheckTable(tableName); XmlNode obj = table.SelectSingleNode(key);//按照key值確定元素對象 if (obj == null) {//待更新數據不存在，更新失敗 return false; } for (int i = 0; i < cols.Length; i++) { obj.SelectSingleNode(cols[i]).InnerText = values[i].Replace(" ", ""); } xmlDoc.Save(path); return true; } public override bool UpdateAll(string tableName) { return false; } public override string[] Select(string tableName, string key) { XmlNode table = CheckTable(tableName); if (key == null || key == "") { if (table.ChildNodes.Count < 1) { return null; } key = table.ChildNodes[0].LocalName; } key = key.Replace(" ", ""); XmlNode obj = table.SelectSingleNode(key);//按照key值確定元素對象 if (obj == null) { return null; } string[] values = new string[obj.ChildNodes.Count]; for (int i = 0; i < values.Length; i++) { values[i] = obj.ChildNodes.Item(i).InnerText.Replace(" ", ""); } return values; } public override string[] SelectAllObjectsName(string tableName) { XmlNode table = CheckTable(tableName); string[] values = new string[table.ChildNodes.Count]; for (int i = 0; i < values.Length; i++) { values[i] = table.ChildNodes[i].LocalName; } return values; } public override List<string[]> SelectAll(string tableName) { XmlNode table = CheckTable(tableName); if (table.ChildNodes.Count == 0) { return null; } List<string[]> elements = new List<string[]>(); for(int i=0;i<table.ChildNodes.Count;i++){ string[] values = new string[table.ChildNodes[i].ChildNodes.Count]; for (int j = 0; j < table.ChildNodes[i].ChildNodes.Count; j++) { values[j] = table.ChildNodes[i].ChildNodes.Item(j).InnerText.Trim(); } elements.Add(values); } return elements; } public override bool Delete(string tableName, string key) { XmlNode table = CheckTable(tableName); if (key == null || key == "") key = table.ChildNodes[0].LocalName; key = key.Replace(" ", ""); XmlNode obj = table.SelectSingleNode(key);//按照key值確定元素對象 if (obj == null) return false; obj.RemoveAll(); table.RemoveChild(obj); xmlDoc.Save(path); return true; } public override bool DeleteAll(string tableName) { XmlNode table = CheckTable(tableName); table.RemoveAll(); xmlDoc.Save(path); return true; } }
接下來就是編輯器的設計。沒什么高大上的東西，就是一些讀寫和調用的方法，以及一些邏輯上的處理。
using UnityEngine; using System.Collections; using System.Collections.Generic; using System.Reflection; using System; public class MyInspector : MonoBehaviour { //這個類是一個編輯器類，作用是展示存儲的xml數據 //選擇對象，然后進行編輯 //如果數據庫中有這個數值，將其讀取並顯示 //如果沒有，則按需求創建數據 //public string path; public string defaultKey = "PriKey"; public ObjectMessage objMessage; public string DataPath = "gameData.xml"; public MySql mySql; public bool IsHave = false; public bool IsShow = false; //private System.Object tempObj; public void GetDataBase(string dataPath) { DB db = MyDataBase.GetDataBase().Connection(dataPath); mySql = new MySql(db); } public void SaveMessage(string objName) { if (mySql != null) { System.Object obj = Assembly.GetExecutingAssembly().CreateInstance(objName); ClassAnalyze<System.Object> tempAnalyze = new ClassAnalyze<System.Object>(obj); obj=tempAnalyze.GetClazz(objMessage.values); if (IsHave) { mySql.Update(obj, defaultKey); } else { mySql.Insert(obj, defaultKey); ReadObj(objMessage.NamesOfModel[objMessage.indexOfModel]); } } } public void RemoveMessage(string objName, string key) { if (mySql != null) { System.Object obj = Assembly.GetExecutingAssembly().CreateInstance(objName); ClassAnalyze<System.Object> tempAnalyze = new ClassAnalyze<System.Object>(obj); tempAnalyze.SetValue(obj, defaultKey, key); if (IsHave) { mySql.Delete(obj, defaultKey); IsHave = false; ClearObjMessage(); } } } public void ClearObjMessage() { for (int i = 0; i < objMessage.values.Length; i++) { objMessage.values[i] = ""; } } public void ReadModel() { TextAsset[] tas = Resources.LoadAll<TextAsset>(objMessage.objectPath); objMessage. NamesOfModel = new string[tas.Length]; for (int i = 0; i < tas.Length; i++) { objMessage.NamesOfModel[i] = tas[i].name; } } public void ReadObj(string tableName) { if(mySql!=null) objMessage.NamesOfObj = mySql.SelectAllObjectsName(tableName); } public void CheckData(string objName, string key) { System.Object obj = Assembly.GetExecutingAssembly().CreateInstance(objName); ClassAnalyze<System.Object> tempAnalyze = new ClassAnalyze<System.Object>(obj); tempAnalyze.SetValue(obj, defaultKey, key); objMessage.cols = tempAnalyze.Cols; obj = mySql.Select(obj, defaultKey); IsHave = (obj != null); if (IsHave) { tempAnalyze = new ClassAnalyze<System.Object>(obj); objMessage.values = tempAnalyze.Values; } else { objMessage.values = new string[objMessage.cols.Length]; } } } [Serializable] public class ObjectMessage { public string objectPath = "Model";//對象所處的路徑（基於Resources的相對路徑） public string[] NamesOfModel; public string[] NamesOfObj; public int indexOfModel = 0; public int indexOfObj = 0; public string PriKey = "PriKey"; public string[] cols; public string[] values; }
下面這個腳本要放在Editor目錄下面
using UnityEngine; using System.Collections; using UnityEditor; [CustomEditor(typeof(MyInspector))] public class EditorInspector : Editor { //重寫展示面板 //用戶選擇要加載的對象 //提供一個主鍵，用戶填寫主鍵的值 //默認主鍵是游戲對象名稱 //判斷此對象是否已經保存在數據庫中 //如果已經存在此主鍵，則，加載數據到面板 //如果沒有此主鍵，提示用戶是否創建 // private SerializedObject TargetObj; private MyInspector MyPlane; private string[] shows= new string[]{"創建","加載"}; private void InitPlane() { TargetObj = new SerializedObject(target);//獲取編輯對象目標 MyPlane = target as MyInspector;//轉化為編輯對象 CheckData();//檢測數據 } private void CheckData() { if (MyPlane.objMessage == null)//檢查信息對象是否為空 { MyPlane.objMessage = new ObjectMessage();//對象信息 } if (MyPlane.objMessage.NamesOfModel == null || MyPlane.objMessage.NamesOfModel.Length < 1) {//檢查對象數組 MyPlane.ReadModel();//讀取對象 } if (MyPlane.objMessage.NamesOfObj == null || MyPlane.objMessage.NamesOfObj.Length < 1) {//檢查對象數組 MyPlane.ReadObj(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel]);//讀取對象 } if (MyPlane.objMessage.PriKey == null || MyPlane.objMessage.PriKey == "") {//檢查對象主鍵名稱 //設置主鍵信息 MyPlane.objMessage.PriKey = MyPlane.gameObject.name.Replace(" ", ""); } if (MyPlane.mySql == null) {//檢查數據庫的連接狀態 //獲取數據庫連接 MyPlane.GetDataBase(MyPlane.DataPath); } } void OnEnable() { InitPlane(); } public override void OnInspectorGUI() { TargetObj.Update();//更新目標數據 //主鍵值 //CheckData(); int lastModel = MyPlane.objMessage.indexOfModel; //對象選擇列表 MyPlane.objMessage.indexOfModel = EditorGUILayout.Popup("對象組", MyPlane.objMessage.indexOfModel, MyPlane.objMessage.NamesOfModel); if (lastModel != MyPlane.objMessage.indexOfModel) { //當改變對象時，更新主鍵值 //更新主鍵值集合 MyPlane.ReadObj(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel]); } int lastobj = MyPlane.objMessage.indexOfObj; if (MyPlane.objMessage.NamesOfObj.Length > 0) { MyPlane.objMessage.indexOfObj = EditorGUILayout.Popup("對象", MyPlane.objMessage.indexOfObj, MyPlane.objMessage.NamesOfObj); } if (lastobj != MyPlane.objMessage.indexOfObj || lastModel != MyPlane.objMessage.indexOfModel) { //主鍵值集合下標改變時 //更新主鍵值 if (MyPlane.objMessage.NamesOfObj.Length>0) MyPlane.objMessage.PriKey = MyPlane.objMessage.NamesOfObj[MyPlane.objMessage.indexOfObj]; } string lastKey = MyPlane.objMessage.PriKey; //顯示主鍵文本框 MyPlane.objMessage.PriKey = EditorGUILayout.TextField("主鍵", MyPlane.objMessage.PriKey); //路徑 string lastPath = MyPlane.DataPath; MyPlane.DataPath = EditorGUILayout.TextField("數據路徑",MyPlane.DataPath); //判斷選擇的對象列表 //更新對象信息 if (MyPlane.objMessage.indexOfModel != lastModel || lastKey != MyPlane.objMessage.PriKey || lastPath != MyPlane.DataPath || lastobj != MyPlane.objMessage.indexOfObj)//改變了一些數據時重新讀取數據 { MyPlane.IsHave = false;//標注數據改動 CheckData();//讀取數據前保證系統參數無誤，以及各個對象正確加載 MyPlane.CheckData(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel], MyPlane.objMessage.PriKey); } //當存在時直接加載 //當不存在時，點擊創建時加載 bool _show = MyPlane.IsShow;//記錄上一次的狀態 if (MyPlane.IsHave || (MyPlane.IsShow = EditorGUILayout.Foldout(MyPlane.IsShow, shows[MyPlane.IsShow ? 1 : 0]))) { if (!_show && !MyPlane.IsHave)//數據不存在而且點擊了創建的時候 { //僅執行一次，保證數據不被一直刷新而導致的無法讀寫 //當數據不存在，而且點擊創建時 清除信息 MyPlane.ClearObjMessage();//清除數據的緩存 } } //也要只進行一次的讀寫，保證可以進行修改操作 if (MyPlane.IsHave || MyPlane.IsShow)//當數據存在或者點擊創建時加載數據 { for (int i = 0; i < MyPlane.objMessage.cols.Length; i++) { if (MyPlane.defaultKey == MyPlane.objMessage.cols[i]) { MyPlane.objMessage.values[i] = MyPlane.objMessage.PriKey; continue; } MyPlane.objMessage.values[i] = EditorGUILayout.TextField(MyPlane.objMessage.cols[i], MyPlane.objMessage.values[i]); } if (GUILayout.Button("Save")) { MyPlane.SaveMessage(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel]); } if (MyPlane.IsHave&& GUILayout.Button("Remove")) { MyPlane.RemoveMessage(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel], MyPlane.objMessage.PriKey); MyPlane.ReadObj(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel]); } } TargetObj.ApplyModifiedProperties(); } void show(System.Object message) { Debug.Log(message); } }
新的xml數據存儲格式：新建腳本MyXmlSql，繼承DB，然后實現具體的方法：
using System.Xml; using System.Collections.Generic; using System.IO; using System; public class MyXmlSql : DB { private XmlDocument xmlDoc; private string path; private string rootName; public MyXmlSql() { xmlDoc = new XmlDocument(); } public MyXmlSql(string path) { xmlDoc = new XmlDocument(); Connect(path); } public override void Connect(string path) { if (xmlDoc == null) xmlDoc = new XmlDocument(); if (!CheckDB(path)) { this.path = path; rootName = path.Substring(path.LastIndexOf("/")+1,path.LastIndexOf(".")- path.LastIndexOf("/")-1); CreateDB(rootName); } else { this.path = path; xmlDoc.Load(this.path); rootName = xmlDoc.LastChild.LocalName; } } public override void Close() { if (xmlDoc != null) xmlDoc.Save(path); GC.Collect(); } public XmlNode CheckTable(string tableName) { XmlNode root = xmlDoc.SelectSingleNode(rootName); if (root.SelectSingleNode(tableName) != null) { return root.SelectSingleNode(tableName); } return CreateTable(root,tableName); } public bool CheckDB(string dBName) { return File.Exists(dBName); } public XmlNode CreateTable(XmlNode root,string tableName) { XmlNode table = xmlDoc.CreateElement(tableName); root.AppendChild(table); xmlDoc.Save(path); return table; } public XmlNode CreateDB(string dBName) { File.CreateText(path).Close(); XmlDeclaration xmlDeclaration = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null); XmlNode root = xmlDoc.CreateElement(dBName); xmlDoc.AppendChild(xmlDeclaration); xmlDoc.AppendChild(root); xmlDoc.Save(path); return root; } public override bool Insert(string tableName, string[] cols, string[] values,string key) { if (key == null || key == "") key = values[0]; key = key.Replace(" ",""); XmlNode table = CheckTable(tableName); XmlNode obj = table.SelectSingleNode(key);//按照key值確定元素對象 if (obj != null) {//待插入數據已經存在，插入失敗 return false; } XmlElement element = xmlDoc.CreateElement(key); for (int i = 0; i < cols.Length; i++) { XmlAttribute xa = xmlDoc.CreateAttribute(cols[i]); xa.Value = values[i].Replace(" ", ""); element.Attributes.Append(xa); } table.AppendChild(element); xmlDoc.Save(path); return true; } public override bool Update(string tableName, string[] cols, string[] values,string key) { if (key == null || key == "") key = values[0]; key = key.Replace(" ", ""); XmlNode table = CheckTable(tableName); XmlNode obj = table.SelectSingleNode(key);//按照key值確定元素對象 if (obj == null) {//待更新數據不存在，更新失敗 return false; } for (int i = 0; i < cols.Length; i++) { obj.Attributes[cols[i]].Value = values[i].Replace(" ", ""); } xmlDoc.Save(path); return true; } public override bool UpdateAll(string tableName) { return false; } public override string[] Select(string tableName, string key) { XmlNode table = CheckTable(tableName); if (key == null || key == "") { if (table.ChildNodes.Count < 1) { return null; } key = table.ChildNodes[0].LocalName; } key = key.Replace(" ", ""); XmlNode obj = table.SelectSingleNode(key);//按照key值確定元素對象 if (obj == null) { return null; } string[] values = new string[obj.Attributes.Count];
for (int i = 0; i < values.Length; i++) { values[i] = obj.Attributes[i].Value.Replace(" ", ""); } return values; } public override string[] SelectAllObjectsName(string tableName) { XmlNode table = CheckTable(tableName); string[] values = new string[table.ChildNodes.Count]; for (int i = 0; i < values.Length; i++) { values[i] = table.ChildNodes[i].LocalName; } return values; } public override List<string[]> SelectAll(string tableName) { XmlNode table = CheckTable(tableName); if (table.ChildNodes.Count == 0) { return null; } List<string[]> elements = new List<string[]>(); for(int i=0;i<table.ChildNodes.Count;i++){//遍歷表的子節點 string[] values = new string[table.ChildNodes[i].Attributes.Count]; for (int j = 0; j < table.ChildNodes[i].Attributes.Count; j++) { values[j] = table.ChildNodes[i].Attributes[j].Value.Trim(); } elements.Add(values); } return elements; } public override bool Delete(string tableName, string key) { XmlNode table = CheckTable(tableName); if (key == null || key == "") key = table.ChildNodes[0].LocalName; key = key.Replace(" ", ""); XmlNode obj = table.SelectSingleNode(key);//按照key值確定元素對象 if (obj == null) return false; obj.RemoveAll(); table.RemoveChild(obj); xmlDoc.Save(path); return true; } public override bool DeleteAll(string tableName) { XmlNode table = CheckTable(tableName); table.RemoveAll(); xmlDoc.Save(path); return true; } }
本文地址：http://www.cnblogs.com/jqg-aliang/p/4767026.html