具有自定义分页和排序功能的DataGrid控件

  因为项目需要，要弄个有这样功能的控件。要有自定意分页和排序的功能。在这个控件里面数据的绑定都是用DataView来实现，DataView放在Session里，如果大家有更灵活的方法可以留言给我。Session的名字我已经做成了属性叫 sessionName，可以直接设置，你们喜欢叫什么就自己改吧。以下是完整的代码，由于是刚刚出炉，可能会有考虑不足的地方，希望使用或修改的朋友多提意见一起交流，我分享我快乐：）
下面是可以使用的控件
先下载过的朋友，那个DLL文件有问题，下这个新的，下面的程序代码也改了一个小地方271行
该控件使用方法和DataGrid一样，需要分页时必须设置分页功能为true
LcDataGrid.rar

  1 using  System;
  2 using  System.Web.UI;
  3 using  System.Web.UI.WebControls;
  4 using  System.ComponentModel;
  5 using  System.Data;
  6
  7 namespace  LcWebControls
  8 {
  9    /**//// <summary>
 10    /// 卢昶 2005-7-11
 11    /// Email:[email protected]
 12    /// msn:[email protected]
 13    /// </summary>
 14    [DefaultProperty("Text"), 
 15        ToolboxData("<{0}:LcDataGrid runat=server></{0}:LcDataGrid>")]
 16    public class LcDataGrid : System.Web.UI.WebControls.DataGrid
 17    {
 18Define#region Define
 19        private string text;
 20        private System.Web.UI.WebControls.Button bt=new Button();
 21        private TextBox tb=new TextBox();
 22        private System.Web.UI.Page pg=new Page();
 23        private string sessionname;
 24        private LinkButton PrevPAGE=new LinkButton();
 25        private LinkButton NextPAGE=new LinkButton();
 26        private DropDownList ddl=new DropDownList();
 27        private Label lbend=new Label();
 28        private Label lbtag=new Label();
 29        private Label lbddls=new Label();
 30        private Label lbddle=new Label();
 31        
 32#endregion
 33displayPortery#region displayPortery
 34
 35        public int Currindex
 36        {
 37            set
 38            {
 39                try
 40                {
 41                     this.CurrentPageIndex=value;
 42                }
 43                catch
 44                {
 45                    
 46                }
 47                
 48            }
 49            get
 50            {
 51              return this.CurrentPageIndex;
 52            }
 53        }
 54#endregion    
 55Property#region Property
 56
 57
 58        [Bindable(true), 
 59            Category("Appearance"), 
 60            DefaultValue("")] 
 61        public string Text 
 62        {
 63            get
 64            {
 65                return text;
 66            }
 67
 68            set
 69            {
 70                text = value;
 71            }
 72        }
 73        [Bindable(true), 
 74        Category("Appearance"), 
 75        DefaultValue(""),
 76        DescriptionAttribute("Session的名称，Session用于数据绑定，必须是DataView类型")
 77        ] 
 78        public string sessionName
 79        {
 80            get
 81            {
 82                return sessionname;
 83            }
 84            set
 85            {
 86                sessionname=value;
 87
 88            }
 89        }
 90        [Bindable(true), 
 91            Category("Appearance"), 
 92            DefaultValue("")] 
 93            public string TT
 94            {
 95                get
 96                {
 97                    try
 98                    {
 99                        
100                        return this.ViewState["sort"].ToString();
101                    }
102                    catch
103                    {
104                         this.ViewState["sort"]="asc";
105                        return this.ViewState["sort"].ToString();
106                    }
107                    
108                }
109                set
110                {
111                    this.ViewState["sort"]=value;
112                }
113
114            }
115        
116    #endregion
117
118        /**//// <summary> 
119        /// 将此控件呈现给指定的输出参数。
120        /// </summary>
121        /// <param name="output"> 要写出到的 HTML 编写器 </param>
122
123protected override void OnItemCreated(DataGridItemEventArgs e)
124        {    
125
126            if(e.Item.ItemType == ListItemType.Pager)
127            {
128                e.Item.Cells[0].Controls.Clear();
129                TextBox tb=new TextBox();
130                creatControl(e.Item.Cells[0]);
131            }
132
133         
134        }
135protected override void OnItemCommand(DataGridCommandEventArgs e)
136        {
137            string strCommandName = e.CommandName;
138            if(e.CommandName == null) 
139                return;
140
141            strCommandName = string.IsInterned(strCommandName);
142            switch(e.CommandName)
143            {
144            
145                case "PrevPAGE":
146                {
147                    PrevPAGE_Click(null,null);
148                    break;
149                }
150                case "NextPAGE":
151                {
152                    NextPAGE_Click(null,null);
153                    break;
154                }
155                
156            }
157            base.OnItemCommand(e);
158        }
159    
160protected override void OnItemDataBound(DataGridItemEventArgs e)
161{
162            
163           if(e.Item.ItemType==ListItemType.Item||e.Item.ItemType==ListItemType.AlternatingItem)
164            {
165                e.Item.Attributes.Add("style","cursor:hand");
166                e.Item.Attributes.Add("onmouseover","this.style.backgroundColor='#FFCC00'");
167                e.Item.Attributes.Add("onmouseout","this.style.backgroundColor=''");
168            }
169}
170        protected override void OnSortCommand(DataGridSortCommandEventArgs e)
171        {
172            base.OnSortCommand (e);
173            DataView dv=(DataView)this.Page.Session[sessionName];
174            if (TT.Equals("desc"))
175            {
176                dv.Sort=e.SortExpression+" asc";
177                TT="asc";
178            }
179            else
180            {
181                dv.Sort=e.SortExpression+" desc";
182                TT="desc";
183            }
184            
185            
186            this.DataSource=dv;
187            this.DataBind();
188            this.Page.Session[sessionName]=dv;
189        }
190
191
192    
193
194InitDataGird#region InitDataGird
195
196        protected void creatControl(TableCell tc)
197        {
198
199            creatPageCount(tc);
200            creatCount(tc);
201            creatSPage(tc);
202            creatDDL(tc);
203
204
205        }
206        private void creatCount(TableCell tc)
207        {
208        
209            lbtag.Text="  每页显示记录数";
210            tb.Text=this.PageSize.ToString();
211            tb.Width=20;
212            bt.Text="提交";
213            bt.Click+=new EventHandler(bt_Click);
214            tc.Controls.Add(lbtag);
215            tc.Controls.Add(tb);
216            tc.Controls.Add(bt);
217           // 
218
219        }
220        
221        private void creatPageCount(TableCell tc)
222        {
223            Label lb=new Label();
224            lb.Text="<P align=/"right/"> 共"+this.PageCount+"页    第"+(this.CurrentPageIndex+1)+"页  ";
225            tc.Controls.Add(lb);
226
227        }
228    
229        private void creatSPage(TableCell tc)
230        {
231         PrevPAGE.Text="上一页";
232        NextPAGE.Text="下一页";    
233        PrevPAGE.CommandName="PrevPAGE";
234        NextPAGE.CommandName="NextPAGE";
235        tc.Controls.Add(PrevPAGE);
236        tc.Controls.Add(NextPAGE);
237        }
238        private void creatDDL(TableCell tc)
239        {
240            
241            lbend.Text="页</p>";
242            lbddls.Text="  跳转到第";
243            ddl.AutoPostBack=true;
244            ddl.EnableViewState=true;
245            if (!this.Page.IsPostBack)
246            {
247                ddl.Items.Clear();
248                initDDL();
249            }
250            ddl.SelectedIndexChanged+=new EventHandler(ddl_SelectedIndexChanged);
251            tc.Controls.Add(lbddls);
252            tc.Controls.Add(ddl);
253            tc.Controls.Add(lbend);
254        }
255        private void initDDL()
256        {
257            int count=this.PageCount;
258            
259            for (int i=1;i<=count;i++)
260            {
261                ddl.Items.Add(i.ToString());
262                
263            }
264        }
265        #endregion
266InitEvent#region InitEvent
267        private void bt_Click(object sender, EventArgs e)
268    {
269        this.PageSize=Convert.ToInt32(tb.Text);
270        ddl.Items.Clear();
271        initDDL();
                 this.CurrentPageIndex=0;

272        BindGrid();
273    }
274        private void PrevPAGE_Click(object sender, EventArgs e)
275        {
276            int con=this.CurrentPageIndex;
277            if (this.CurrentPageIndex-1<0)
278            {
279                
280
281            }
282            else
283            {
284                this.CurrentPageIndex=con-1;
285            }
286            ddl.SelectedValue=(this.CurrentPageIndex+1).ToString();
287            BindGrid();
288            
289        }
290        private void NextPAGE_Click(object sender, EventArgs e)
291        {
292            int con=this.CurrentPageIndex;
293            if (this.CurrentPageIndex>=this.PageCount-1)
294            {
295                
296            }
297            else
298            {
299                this.CurrentPageIndex=con+1;
300            }
301            ddl.SelectedValue=(this.CurrentPageIndex+1).ToString();
302            BindGrid();
303            
304        }
305        private void ddl_SelectedIndexChanged(object sender, EventArgs e)
306        {
307            int curri=Convert.ToInt16(ddl.SelectedValue) - 1;
308            this.CurrentPageIndex=curri;
309            BindGrid();
310        }
311
312        #endregion
313GridFunction#region GridFunction
314private void BindGrid()
315{
316    this.DataSource=(DataView)Page.Session[sessionName];
317    this.DataBind();
318
319}
320        #endregion
321
322        
323    }
324}
325