unity编辑器xml数据库插件
unity编辑器xml数据库插件
注：9月9日更新，其中MyXML.cs中有一句代码写错，查找功能失误，文中已经修改！
注：9月1日更新说明：xml存储结构，因为在用xml之前不知道正规的xml数据结构，所以是自创的结构。虽然也能完成功能，但是据说策划配置时不方便，所以为了统一，不使用节点的方式存储数据，
而是通过添加属性，设置属性的方式来存取数据。
直接上图看的清楚些：
我之前设计的格式：
现在的格式：
关于这部分的代码我会贴在最后。
程序和数据分离的意义我就不多说了，大家自己脑补或者百度。在使用unity开发时，数据的调试是非常频繁和重要的。我们可以制作一个简单的编辑器插件，将数据显示在Inspector面板上，并进行编辑操作。这样测试人员就可以非常方便的管理测试数据了。
需求很简单，具体的效果是，能读取资源内的类，将其属性显示在面板上，可以对此进行增删改查的操作。如下图所示（对象组，相当于数据库所有的表。对象，相当于表的所有记录）。
当需要创建一条新记录的时候，先填上主键，然后点击创建按钮。编辑完成后点击插入即可。
xml数据库文件如下图
要实现这个功能，需要的知识是，C#的反射类，unity的编辑器类，数据库。通过反射，自动解析对象，获取对象的成员变量名和值。Unity编辑器类没什么好说的，就是一些组件方法的使用。考虑到跨平台等问题，我选择xml作为存储数据库。编辑器内运行，存储量不大，所以性能方面的问题也就不说了。
好，接下来说一说设计的事。首先是对象的反射。基本类型的存储没有问题，难点是数组的存取有点变态。我找了很多资料也不能自动创建某一类型的数组。既然不能自动，然后就使用半自动判断了，无非是if else之类的，看看这个属性是不是某一类型的数组。
下面是代码。
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)
{//将数值赋给对象，然后再获取
SetClazz(values);
this.Values = values;
if (tempClazz == null)
{
return default(T);
}
return tempClazz;
}
public void SetClazz(string[] values)
{//将数值赋给对象，然后再获取
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;
}
}
反射搞定后就是设计xml数据库了，具体的功能看个人需求。关于操作xml还是很简单的。
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值确定元素对象 if (obj != null) {//待插入数据已经存在，插入失败 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值确定元素对象 if (obj == null) {//待更新数据不存在，更新失败 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值确定元素对象 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值确定元素对象 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; } }
接下来就是编辑器的设计。没什么高大上的东西，就是一些读写和调用的方法，以及一些逻辑上的处理。
using UnityEngine; using System.Collections; using System.Collections.Generic; using System.Reflection; using System; public class MyInspector : MonoBehaviour { //这个类是一个编辑器类，作用是展示存储的xml数据 //选择对象，然后进行编辑 //如果数据库中有这个数值，将其读取并显示 //如果没有，则按需求创建数据 //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";//对象所处的路径（基于Resources的相对路径） public string[] NamesOfModel; public string[] NamesOfObj; public int indexOfModel = 0; public int indexOfObj = 0; public string PriKey = "PriKey"; public string[] cols; public string[] values; }
下面这个脚本要放在Editor目录下面
using UnityEngine; using System.Collections; using UnityEditor; [CustomEditor(typeof(MyInspector))] public class EditorInspector : Editor { //重写展示面板 //用户选择要加载的对象 //提供一个主键，用户填写主键的值 //默认主键是游戏对象名称 //判断此对象是否已经保存在数据库中 //如果已经存在此主键，则，加载数据到面板 //如果没有此主键，提示用户是否创建 // private SerializedObject TargetObj; private MyInspector MyPlane; private string[] shows= new string[]{"创建","加载"}; private void InitPlane() { TargetObj = new SerializedObject(target);//获取编辑对象目标 MyPlane = target as MyInspector;//转化为编辑对象 CheckData();//检测数据 } private void CheckData() { if (MyPlane.objMessage == null)//检查信息对象是否为空 { MyPlane.objMessage = new ObjectMessage();//对象信息 } if (MyPlane.objMessage.NamesOfModel == null || MyPlane.objMessage.NamesOfModel.Length < 1) {//检查对象数组 MyPlane.ReadModel();//读取对象 } if (MyPlane.objMessage.NamesOfObj == null || MyPlane.objMessage.NamesOfObj.Length < 1) {//检查对象数组 MyPlane.ReadObj(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel]);//读取对象 } if (MyPlane.objMessage.PriKey == null || MyPlane.objMessage.PriKey == "") {//检查对象主键名称 //设置主键信息 MyPlane.objMessage.PriKey = MyPlane.gameObject.name.Replace(" ", ""); } if (MyPlane.mySql == null) {//检查数据库的连接状态 //获取数据库连接 MyPlane.GetDataBase(MyPlane.DataPath); } } void OnEnable() { InitPlane(); } public override void OnInspectorGUI() { TargetObj.Update();//更新目标数据 //主键值 //CheckData(); int lastModel = MyPlane.objMessage.indexOfModel; //对象选择列表 MyPlane.objMessage.indexOfModel = EditorGUILayout.Popup("对象组", MyPlane.objMessage.indexOfModel, MyPlane.objMessage.NamesOfModel); if (lastModel != MyPlane.objMessage.indexOfModel) { //当改变对象时，更新主键值 //更新主键值集合 MyPlane.ReadObj(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel]); } int lastobj = MyPlane.objMessage.indexOfObj; if (MyPlane.objMessage.NamesOfObj.Length > 0) { MyPlane.objMessage.indexOfObj = EditorGUILayout.Popup("对象", MyPlane.objMessage.indexOfObj, MyPlane.objMessage.NamesOfObj); } if (lastobj != MyPlane.objMessage.indexOfObj || lastModel != MyPlane.objMessage.indexOfModel) { //主键值集合下标改变时 //更新主键值 if (MyPlane.objMessage.NamesOfObj.Length>0) MyPlane.objMessage.PriKey = MyPlane.objMessage.NamesOfObj[MyPlane.objMessage.indexOfObj]; } string lastKey = MyPlane.objMessage.PriKey; //显示主键文本框 MyPlane.objMessage.PriKey = EditorGUILayout.TextField("主键", MyPlane.objMessage.PriKey); //路径 string lastPath = MyPlane.DataPath; MyPlane.DataPath = EditorGUILayout.TextField("数据路径",MyPlane.DataPath); //判断选择的对象列表 //更新对象信息 if (MyPlane.objMessage.indexOfModel != lastModel || lastKey != MyPlane.objMessage.PriKey || lastPath != MyPlane.DataPath || lastobj != MyPlane.objMessage.indexOfObj)//改变了一些数据时重新读取数据 { MyPlane.IsHave = false;//标注数据改动 CheckData();//读取数据前保证系统参数无误，以及各个对象正确加载 MyPlane.CheckData(MyPlane.objMessage.NamesOfModel[MyPlane.objMessage.indexOfModel], MyPlane.objMessage.PriKey); } //当存在时直接加载 //当不存在时，点击创建时加载 bool _show = MyPlane.IsShow;//记录上一次的状态 if (MyPlane.IsHave || (MyPlane.IsShow = EditorGUILayout.Foldout(MyPlane.IsShow, shows[MyPlane.IsShow ? 1 : 0]))) { if (!_show && !MyPlane.IsHave)//数据不存在而且点击了创建的时候 { //仅执行一次，保证数据不被一直刷新而导致的无法读写 //当数据不存在，而且点击创建时 清除信息 MyPlane.ClearObjMessage();//清除数据的缓存 } } //也要只进行一次的读写，保证可以进行修改操作 if (MyPlane.IsHave || MyPlane.IsShow)//当数据存在或者点击创建时加载数据 { 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数据存储格式：新建脚本MyXmlSql，继承DB，然后实现具体的方法：
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值确定元素对象 if (obj != null) {//待插入数据已经存在，插入失败 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值确定元素对象 if (obj == null) {//待更新数据不存在，更新失败 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值确定元素对象 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++){//遍历表的子节点 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值确定元素对象 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; } }
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