重新封装了一个 GridView，支持如下功能：
1. CheckBox选择记录，指定CheckBox的位置2. 支持List，DataSet,Datatable 排序3. 排序时在Header部分出现图标4. 封装了PageIndexChanged 和DataBind，不用每页都写。
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Web; 6 using System.Web.UI; 7 using System.Web.UI.WebControls; 8 using System.Reflection; 9 10 namespace xxWare.xxControls 11 { 12 [ToolboxData( " <{0}:xxGridView runat=server></{0}:xxGridView> " )] 13 public class xxGridView : System.Web.UI.WebControls.GridView 14 { 15 #region Properties 16 // sort image url : full url = Sort_Image_Url + Asc_Image_Name 17 [Browsable( true ) , Category( " Sort Image " ), DefaultValue( " images/arrow_up.gif " ) , Description( " Asc Image " )] 18 public string Asc_Image { get ; set ; } 19 [Browsable( true ), Category( " Sort Image " ), DefaultValue( " images/arrow_down.gif " ), Description( " Desc Image " )] 20 public string Desc_Image { get ; set ; } 21 [Browsable( true ), Category( " Sort Image " ), DefaultValue( " images/arrow_updn.gif " ), Description( " Sortable Image " )] 22 public string Sort_Image { get ; set ; } 23 24 // Property : SortExpression 25 [Browsable( false )] 26 public string CurrentSortExpression 27 { 28 get { return Convert.ToString(ViewState[ " CurrentSortExpression " ]); } 29 set { ViewState[ " CurrentSortExpression " ] = value.Trim(); } 30 } 31 [Browsable( false )] 32 public string CurrentSortDirection 33 { 34 get { return Convert.ToString(ViewState[ " CurrentSortDirection " ]); } 35 set 36 { 37 if ( string .IsNullOrEmpty(value)) 38 { 39 ViewState[ " CurrentSortDirection " ] = " desc " ; 40 } 41 else 42 { 43 if (value.ToLower() != " asc " && value.ToLower() != " desc " ) 44 { 45 ViewState[ " CurrentSortDirection " ] = " desc " ; 46 } 47 else 48 { 49 ViewState[ " CurrentSortDirection " ] = value.ToString().ToLower(); 50 } 51 } 52 } 53 } 54 55 // Property : Multi Show CheckBox 56 [Category( " MultiSelect " ) , DefaultValue( " True " )] 57 public bool AllowMultiSelect 58 { 59 get { return bool .Parse(ViewState[ " AllowMultiSelect " ].ToString()); } 60 set { ViewState[ " AllowMultiSelect " ] = value.ToString(); } 61 } 62 [Category( " MultiSelect " ), DefaultValue( 0 )] 63 public int AllowMultiSelectColumn 64 { 65 get { return Int32.Parse(ViewState[ " AllowMultiSelectColumn " ].ToString()); } 66 set { ViewState[ " AllowMultiSelectColumn " ] = value.ToString(); } 67 } 68 /* 69 public string RowSelectFilter 70 { 71 get { return (string)ViewState["RowSelectFilter"]; } 72 set { ViewState["RowSelectFilter"] = value.ToString(); } 73 } 74 * */ 75 // Property : Get Selected Items 76 [Browsable( false )] 77 public List < GridViewRow > MultiSelectedItem 78 { 79 get 80 { 81 if ( ! AllowMultiSelect) return null ; 82 83 List < GridViewRow > selectedRows = new List < GridViewRow > (); 84 foreach (GridViewRow row in this .Rows) 85 { 86 CheckBox cb = (CheckBox)row.Cells[AllowMultiSelectColumn].Controls[ 0 ]; 87 if (cb.Checked) 88 { 89 selectedRows.Add(row); 90 } 91 } 92 93 return selectedRows; 94 } 95 } 96 97 // Define DataSource 98 private object sourcedata; 99 public object DataSetSource 100 { 101 get 102 { 103 if (sourcedata != null ) 104 return sourcedata; 105 else 106 return null ; 107 } 108 set 109 { 110 sourcedata = value as object ; 111 } 112 } 113 114 #endregion 115 116 private ClientScriptManager csManager; 117 118 public xxGridView() : base () 119 { 120 AllowPaging = false ; 121 AllowSorting = true ; 122 // GridLines = GridLines.Horizontal; 123 // BorderWidth = (Unit)0; 124 125 // Sort Images Default 126 Asc_Image = @" images/arrow_up.gif " ; 127 Desc_Image = @" images/arrow_down.gif " ; 128 Sort_Image = @" images/arrow_updn.gif " ; 129 130 // set event handlers 131 Init += new EventHandler(On_Init); 132 Sorting += new GridViewSortEventHandler(On_Sorting); 133 RowCreated += new GridViewRowEventHandler(On_RowCreated); 134 } 135 136 #region Event Handlers 137 public event EventHandler GridBindEvent; 138 public virtual void OnGridBind < T > () 139 { 140 if (sourcedata != null ) 141 { 142 if (CurrentSortExpression == string .Empty) 143 { 144 this .DataSource = sourcedata; 145 this .DataBind(); 146 return ; 147 } 148 149 // Datasource Type 150 if (sourcedata is DataTable) 151 { 152 DataView dv = (sourcedata as DataTable).DefaultView; 153 if ( ! string .IsNullOrEmpty(CurrentSortExpression)) 154 dv.Sort = CurrentSortExpression + " " + CurrentSortDirection; 155 156 this .DataSource = dv; 157 this .DataBind(); 158 } 159 else if (sourcedata is DataSet) 160 { 161 DataView dv = (sourcedata as DataSet).Tables[ 0 ].DefaultView; 162 if ( ! string .IsNullOrEmpty(CurrentSortExpression)) 163 dv.Sort = CurrentSortExpression + " " + CurrentSortDirection; 164 165 this .DataSource = dv; 166 this .DataBind(); 167 } 168 else if (sourcedata is List < T > ) 169 { 170 if ( ! string .IsNullOrEmpty(CurrentSortExpression)) 171 { 172 Reverser < T > reverser = new Reverser < T > ( typeof (T), CurrentSortExpression, CurrentSortDirection); 173 (sourcedata as List < T > ).Sort(reverser); 174 } 175 176 this .DataSource = sourcedata; 177 this .DataBind(); 178 } 179 } 180 181 } 182 183 public void On_Init( object sender, EventArgs e) 184 { 185 // processing multi-select 186 if (ViewState[ " AllowMultiSelect " ] == null || ViewState[ " AllowMultiSelect " ].ToString().Trim() == "" ) 187 ViewState[ " AllowMultiSelect " ] = " True " ; 188 if (ViewState[ " AllowMultiSelectColumn " ] == null || ViewState[ " AllowMultiSelectColumn " ].ToString().Trim() == "" ) 189 ViewState[ " AllowMultiSelectColumn " ] = " 0 " ; 190 191 csManager = this .Page.ClientScript; 192 if (AllowMultiSelect) 193 { 194 AddSelectColumn(); 195 RegisterJS(); 196 } 197 198 // processing sorting... 199 if (CurrentSortDirection == null || CurrentSortDirection.Trim() == "" ) 200 CurrentSortDirection = " desc " ; 201 if (CurrentSortExpression == null ) CurrentSortDirection = "" ; 202 } 203 204 public void On_Sorting( object sender , GridViewSortEventArgs e) 205 { 206 CurrentSortExpression = e.SortExpression; 207 if (CurrentSortDirection == " desc " ) 208 CurrentSortDirection = " asc " ; 209 else 210 CurrentSortDirection = " desc " ; 211 212 GridBindEvent( this , EventArgs.Empty); 213 } 214 215 public void On_RowCreated( object sender , GridViewRowEventArgs e) 216 { 217 string currentSortImage = "" ; 218 if (e.Row.RowType == DataControlRowType.Header) 219 { 220 foreach (DataControlField field in this .Columns) 221 { 222 if ( ! String.IsNullOrEmpty(field.SortExpression)) 223 { 224 if (IsSortedByThisField(field.SortExpression)) 225 { 226 currentSortImage = (CurrentSortDirection == " asc " ) ? Asc_Image : Desc_Image; 227 } 228 else 229 { 230 currentSortImage = Sort_Image; 231 } 232 AddSortImage(e.Row, this .Columns.IndexOf(field), currentSortImage); 233 } 234 } 235 } 236 } 237 238 #endregion 239 240 #region Override Methods 241 protected override void OnPageIndexChanging(GridViewPageEventArgs e) 242 { 243 // base.OnPageIndexChanging(e); 244 this .PageIndex = e.NewPageIndex; 245 GridBindEvent( this , EventArgs.Empty); 246 } 247 #endregion 248 249 #region private helper function 250 // For Sort 251 private void AddSortImage(GridViewRow _row, int _colIndex , string _currImage) 252 { 253 if ( - 1 == _colIndex) return ; 254 255 Image sortImage = new Image(); 256 sortImage.ImageUrl = _currImage; 257 _row.Cells[_colIndex].Controls.AddAt( 1 , sortImage); 258 } 259 260 private bool IsSortedByThisField(String strSortExpression) 261 { 262 return CurrentSortExpression.ToLower() == strSortExpression.Trim().ToLower(); 263 } 264 265 // for Multi Select 266 private void AddSelectColumn() 267 { 268 TemplateField tc = new TemplateField(); 269 tc.ItemTemplate = new FarGridColumnTemplate(); 270 tc.HeaderTemplate = new FarGridHeaderTemplate(); 271 272 this .Columns.Insert(AllowMultiSelectColumn, tc); 273 } 274 private void RegisterJS() 275 { 276 /* 277 System.Resources.ResourceManager rm = new System.Resources.ResourceManager("xxGridView", Assembly.GetExecutingAssembly()); 278 string _script = rm.GetString("js_selectall"); 279 280 if (!csManager.IsClientScriptBlockRegistered(this.GetType() , "js_selectall")) 281 { 282 csManager.RegisterClientScriptBlock(this.GetType(), "js_selectall", _script); 283 } 284 */ 285 286 csManager.RegisterClientScriptResource( this .GetType(), " xxWare.xxControls.xxGridViewJS.js " ); 287 } 288 289 #endregion 290 291 } 292 }还有一些如： MultiSelectFilter 等有时间再完善
转载于:https://www.cnblogs.com/jdxx/archive/2011/05/01/GridView.html
