Home Database Mysql Tutorial XtraTreeList使用扎记(2)

XtraTreeList使用扎记(2)

Jun 07, 2016 pm 03:48 PM
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http://www.cnblogs.com/xxm/archive/2006/10/18/532009.html 写完一部分代码。都快要四点了。最近做项目,好久没有往博客上放东西了。趁着还有些精神,赶紧把上次没有发布的代码补上。使用TreeList都有两个月了。发现自己使用它的Tag属性达到了变态的地步,

http://www.cnblogs.com/xxm/archive/2006/10/18/532009.html


写完一部分代码。都快要四点了。最近做项目,好久没有往博客上放东西了。趁着还有些精神,赶紧把上次没有发布的代码补上。使用TreeList都有两个月了。发现自己使用它的Tag属性达到了变态的地步,在Tag属性里放的Struct里面的东西越来越多。在某种程度上。没有这个属性。我的好多工作是无法完成的。考虑到装箱和拆箱的过程,却也无可奈何。这是一个通过DataTable来自动绑定TreeList的类,考虑到了部分数据显示和部分字段显示,在每个SimpleBind的重载中都加入了这一部分的处理,强调一点。我所处理的数据都是以父子节点为基础的绑定。同时。子节点是以1开始。父节点是以 0开始。这样在存入父子节点ID的时候要注意。代码如下,谨供自己和自己一样的菜鸟参考。
  1using System.Collections ;
  2using System.Data ;
  3using BusinessEntity;
  4using PersistenceLayer;
  5using DevExpress.XtraTreeList ;
  6using DevExpress.XtraTreeList.Nodes ;
  7using DevExpress.XtraTreeList.Columns ;
  8namespace NskProject
  9{
 10    /**////


 11    /// 一些实现或辅助绑定TreeList的静态方法。
 12    ///

 13    public class BindTreeList
 14    {
 15        /**////
 16        /// 初级绑定方法,给定的表中有父子关系的字字段,默认情况下表内所有字段都被绑定到控件内
 17        ///

 18        /// 数据源表
 19        /// 需要绑定的控件
 20        public static void SimpleMode(DataTable Dt,TreeList Ti)
 21        {
 22            if(ParentFieldName==null && ChildFieldName==null)
 23            {
 24                return;
 25            }
 26            
 27           Ti.ParentFieldName=ParentFieldName;
 28            Ti.KeyFieldName=ChildFieldName;
 29            Ti.DataSource=Dt;
 30            Ti.PopulateColumns();
 31            return;
 32        }
 33        /**////
 34        /// 初级绑定方法:在前一方法的基础上增加了将某一字段加入到Tag属性中去。保存附加信息
 35        ///         该表在赋值前以父节点为基础进行了排序
 36        ///

 37        /// 数据源表
 38        /// 附加到Tag属性中的字段
 39        /// 需要绑定的控件
 40        public static void SimpleMode(DataTable Dt,DataColumn TagColumn,TreeList Ti)
 41        {
 42            if(ParentFieldName==null && ChildFieldName==null)
 43            {
 44                return;
 45            }
 46            int TagColumnIndex=Dt.Columns.IndexOf(TagColumn);
 47            foreach(DataRow dr in Dt.Rows)
 48            {
 49                object[] Data=new object[Dt.Columns.Count-3];
 50                object Tag=new object() ;
 51                Object[]Source=dr.ItemArray;
 52                int count=0;
 53                //显示数据与附加数据分离
 54                for(int i=0;i  55                {
 56                    if(i!=TagColumnIndex  &&i!=-1)
 57                    {
 58                        Data[count]=Source[count];
 59                        count++;
 60                    }
 61                    else
 62                    {
 63                        Tag=Source[i];
 64                    }
 65                }
 66                int ParentID=Convert.ToInt32(dr[ParentFieldName]);
 67                int ChildID=Convert.ToInt32(dr[ChildFieldName]);
 68                int Balance=0;
 69                if(ParentID==0)
 70                {
 71                    TreeListNode Node=Ti.AppendNode(Data,null);
 72                    Node.Tag=Tag;
 73                    if(Node.Id!=ChildID)
 74                    {
 75                        Balance=ChildID;
 76                        //可能存在只取一部分数据的情况,在这种情况下,取控件内ID与表内ID之间的差额
 77                    }
 78                }
 79                else
 80                {
 81                    TreeListNode ParentNode;
 82                    if(Balance>0)//两种不同情况的取得父节点的方法
 83                    {
 84                        ParentNode=Ti.FindNodeByID(ParentID-Balance);
 85                    }
 86                    else
 87                    {
 88                        ParentNode=Ti.FindNodeByID(ParentID-1);
 89                    }
 90                    if(ParentNode!=null)
 91                    {
 92                        TreeListNode Node=Ti.AppendNode(Data,ParentNode);
 93                        Node.Tag=Tag;
 94                    }
 95                }
 96            }
 97        }
 98        /**////
 99        /// 针对有时候并不是加载一张表内的所有内容,对此加以变形,对于存在于表中不在列表内的字段
100        /// 给删除,对于不在表内而在列表内的值赋空值加入列表内
101        ///

102        /// 数据源表
103        /// 需要在TreeList中显示的字段列表
104        /// 需要绑定的控件
105        public static void SimpleMode(DataTable Dt,string Fields,TreeList Ti)
106        {
107            Ti.Nodes.Clear();
108            int Balance=0;
109            string[] FieldList=Fields.Split(",".ToCharArray());
110            if(ParentFieldName==null && ChildFieldName==null)
111            {
112                return;
113            }
114            foreach(DataRow dr in Dt.Rows)
115            {
116                int index=0;
117                Object[] Data=new object[FieldList.Length];
118                foreach(string o in FieldList)
119                {
120                    if(Dt.Columns.IndexOf(o)>-1)
121                    {
122                        string n=dr[o].ToString().Trim();
123                        Data[index]=n;
124                    }
125                    else
126                    {
127                        Data[index]="";
128                    }
129                    index++;
130                }
131              
132                int ParentID=Convert.ToInt32(dr[ParentFieldName]);
133                int ChildID=Convert.ToInt32(dr[ChildFieldName]);
134                
135                if(ParentID==0)
136                {
137                    TreeListNode Node=Ti.AppendNode(Data,null);
138                    if(Node.Id!=ChildID-1)
139                    {
140                        Balance=Node.Id 141                        //可能存在只取一部分数据的情况,在这种情况下,取控件内ID与表内ID之间的差额
142                    }
143                }
144                else
145                {
146                    TreeListNode ParentNode;
147                    if(Balance>0)//两种不同情况的取得父节点的方法
148                    {
149                        ParentNode=Ti.FindNodeByID(ParentID-Balance);
150                    }
151                    else
152                    {
153                        ParentNode=Ti.FindNodeByID(ParentID-1);
154                    }
155                    if(ParentNode!=null)
156                    {
157                        TreeListNode Node=Ti.AppendNode(Data,ParentNode);
158                        
159                    }
160                }
161            }
162        }
163        /**////
164        ///
165        ///

166        ///
167        ///
168        ///
169        ///
170        public static void SimpleMode(DataTable Dt,string Fields,TreeList Ti,string TagColumn)
171        {
172            Ti.Nodes.Clear();
173            int Balance=0;
174            string[] FieldList=Fields.Split(",".ToCharArray());
175            if(ParentFieldName==null && ChildFieldName==null)
176            {
177                return;
178            }
179            foreach(DataRow dr in Dt.Rows)
180            {
181                int index=0;
182                Object[] Data=new object[FieldList.Length];
183                foreach(string o in FieldList)
184                {
185                    if(o!=TagColumn && Dt.Columns.IndexOf(o)>-1)
186                    {
187                        string n=dr[o].ToString().Trim();
188                        Data[index]=n;
189                    }
190                    else
191                    {
192                        Data[index]="";
193                    }
194                    index++;
195                }
196              
197                int ParentID=Convert.ToInt32(dr[ParentFieldName]);
198                int ChildID=Convert.ToInt32(dr[ChildFieldName]);
199                
200                if(ParentID==0)
201                {
202                    TreeListNode Node=Ti.AppendNode(Data,null);
203                    Node.Tag =dr[TagColumn];
204                    if(Node.Id!=ChildID)
205                    {
206                        Balance=ChildID;
207                        //可能存在只取一部分数据的情况,在这种情况下,取控件内ID与表内ID之间的差额
208                    }
209                }
210                else
211                {
212                    TreeListNode ParentNode;
213                    if(Balance>0)//两种不同情况的取得父节点的方法
214                    {
215                        ParentNode=Ti.FindNodeByID(ParentID-Balance);
216                    }
217                    else
218                    {
219                        ParentNode=Ti.FindNodeByID(ParentID-1);
220                    }
221                    if(ParentNode!=null)
222                    {
223                        TreeListNode Node=Ti.AppendNode(Data,ParentNode);
224                        Node.Tag =dr[TagColumn];
225                        
226                    }
227                }
228            }
229        }
230        private static string _ParentFieldName="";
231        private static string _ChildFieldName="";
232        public  static  string ParentFieldName
233        {
234            get{return _ParentFieldName;}
235            set{_ParentFieldName=value;}
236        }
237
238        public static string ChildFieldName
239        {
240            get{return _ChildFieldName;}
241            set{_ChildFieldName=value;}
242        }
243        
244    }
245}
246
这是一个静态方法,在执行SimpleBind方法前。必须对ChildFieldName和ParentFieldName进行赋值,它们对应着Dt中的父子节点的列名。


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