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这个自定义的C#类可以大大简化GridView的操作，这个C#类定义了一些GridView常用的方法，包括：获取单元格内容、设置单元格内 容、从GridView的数据生成DataTable、将集合类转换成DataTable、将泛型集合类转换成DataTable，简单实用。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 | using System;using System.Collections.Generic;using System.Web.UI;using System.Web.UI.WebControls;using System.Data;using System.Collections;using System.Reflection; namespace DotNet.Utilities{ public class GridViewHelper { #region 私有方法 /// <summary> /// 截取内容长度 /// </summary> /// <param name="o_Str">原字符串</param> /// <param name="len">截取长度</param> /// <returns>截取后字符串</returns> private static string GetStrPartly(string o_Str, int len) { if (len == 0) { return o_Str; } else { if (o_Str.Length > len) { return o_Str.Substring(0, len) + ".."; } else { return o_Str; } } } /// <summary> /// 获取单元格内容 /// </summary> /// <param name="cell">TableCell</param> /// <returns>内容</returns> private static string GetCellText(TableCell cell) { string text = cell.Text; if (!string.IsNullOrEmpty(text)) { return text; } foreach (Control control in cell.Controls) { if (control != null && control is IButtonControl) { IButtonControl btn = control as IButtonControl; text = btn.Text.Replace("\r\n", "").Trim(); break; } if (control != null && control is ITextControl) { LiteralControl lc = control as LiteralControl; if (lc != null) { continue; } ITextControl l = control as ITextControl; text = l.Text.Replace("\r\n", "").Trim(); break; } } return text; } /// <summary> /// 设置单元格内容 /// </summary> /// <param name="cell">TableCell</param> /// <param name="maxLen">最大长度</param> private static void SetCellText(TableCell cell, int maxLen) { string text = cell.Text; if (!string.IsNullOrEmpty(text)) { cell.Text = GetStrPartly(text, maxLen); } foreach (Control control in cell.Controls) { if (control != null && control is IButtonControl) { IButtonControl btn = control as IButtonControl; text = btn.Text.Replace("\r\n", "").Trim(); btn.Text = GetStrPartly(text, maxLen); break; } if (control != null && control is ITextControl) { LiteralControl lc = control as LiteralControl; if (lc != null) { continue; } ITextControl l = control as ITextControl; text = l.Text.Replace("\r\n", "").Trim(); if (l is DataBoundLiteralControl) { cell.Text = GetStrPartly(text, maxLen); break; } else { l.Text = GetStrPartly(text, maxLen); break; } } } } #endregion #region 公有方法 /// <summary> /// 从GridView的数据生成DataTable /// </summary> /// <param name="gv">GridView对象</param> public static DataTable GridView2DataTable(GridView gv) { DataTable table = new DataTable(); int rowIndex = 0; List<string> cols = new List<string>(); if (!gv.ShowHeader && gv.Columns.Count == 0) { return table; } GridViewRow headerRow = gv.HeaderRow; int columnCount = headerRow.Cells.Count; for (int i = 0; i < columnCount; i++) { string text = GetCellText(headerRow.Cells[i]); cols.Add(text); } foreach (GridViewRow r in gv.Rows) { if (r.RowType == DataControlRowType.DataRow) { DataRow row = table.NewRow(); int j = 0; for (int i = 0; i < columnCount; i++) { string text = GetCellText(r.Cells[i]); if (!String.IsNullOrEmpty(text)) { if (rowIndex == 0) { string columnName = cols[i]; if (String.IsNullOrEmpty(columnName)) { continue; } if (table.Columns.Contains(columnName)) { continue; } DataColumn dc = table.Columns.Add(); dc.ColumnName = columnName; dc.DataType = typeof(string); } row[j] = text; j++; } } rowIndex++; table.Rows.Add(row); } } return table; } /// <summary> /// 将集合类转换成DataTable /// </summary> /// <param name="list">集合</param> public static DataTable ToDataTable(IList list) { DataTable result = new DataTable(); if (list.Count > 0) { PropertyInfo[] propertys = list[0].GetType().GetProperties(); foreach (PropertyInfo pi in propertys) { result.Columns.Add(pi.Name, pi.PropertyType); } for (int i = 0; i < list.Count; i++) { ArrayList tempList = new ArrayList(); foreach (PropertyInfo pi in propertys) { object obj = pi.GetValue(list[i], null); tempList.Add(obj); } object[] array = tempList.ToArray(); result.LoadDataRow(array, true); } } return result; } /// <summary> /// 将泛型集合类转换成DataTable /// </summary> /// <typeparam name="T">集合项类型</typeparam> /// <param name="list">集合</param> /// <param name="propertyName">需要返回的列的列名</param> /// <returns>数据集(表)</returns> public static DataTable ToDataTable<T>(IList<T> list, params string[] propertyName) { List<string> propertyNameList = new List<string>(); if (propertyName != null) propertyNameList.AddRange(propertyName); DataTable result = new DataTable(); if (list.Count > 0) { PropertyInfo[] propertys = list[0].GetType().GetProperties(); foreach (PropertyInfo pi in propertys) { if (propertyNameList.Count == 0) { result.Columns.Add(pi.Name, pi.PropertyType); } else { if (propertyNameList.Contains(pi.Name)) result.Columns.Add(pi.Name, pi.PropertyType); } } for (int i = 0; i < list.Count; i++) { ArrayList tempList = new ArrayList(); foreach (PropertyInfo pi in propertys) { if (propertyNameList.Count == 0) { object obj = pi.GetValue(list[i], null); tempList.Add(obj); } else { if (propertyNameList.Contains(pi.Name)) { object obj = pi.GetValue(list[i], null); tempList.Add(obj); } } } object[] array = tempList.ToArray(); result.LoadDataRow(array, true); } } return result; } #endregion }} |