在工作中我們經常會遇到格式轉換的問題，有的時候是將JSON轉換成DataTable、DataSet或是List等，也有可能將DataTable、DataSet或是List轉換成JSON的，抽了點時間把這些方法整合了一下，希望對大家有所幫助，如果有什麼問題請指出來，共同探討。 代碼： 1 using
在工作中我們經常會遇到格式轉換的問題，有的時候是將JSON轉換成DataTable、DataSet或是List等，也有可能將DataTable、DataSet或是List轉換成JSON的，抽了點時間把這些方法整合了一下，希望對大家有所幫助，如果有什麼問題請指出來，共同探討。
代碼：
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Text; 6 using System.Data; 7 using System.Data.Common; 8 using System.Collections; 9 using System.Reflection; 10 11 namespace BJYX.WEB.Public 12 { 13 public class Creat_Json 14 { 15 public Creat_Json() 16 { 17 // 18 // TODO: 在此處添加構造函數邏輯 19 // 20 } 21 22 public static string DataTable2Json(System.Data.DataTable dt) 23 { 24 System.Text.StringBuilder jsonBuilder = new System.Text.StringBuilder(); 25 jsonBuilder.Append("{"); 26 jsonBuilder.AppendFormat("\"total\":{0}, ", dt.Rows.Count); 27 jsonBuilder.Append("\"rows\":[ "); 28 for (int i = 0; i < dt.Rows.Count; i++) 29 { 30 jsonBuilder.Append("{"); 31 for (int j = 0; j < dt.Columns.Count; j++) 32 { 33 jsonBuilder.Append("\""); 34 jsonBuilder.Append(dt.Columns[j].ColumnName); 35 jsonBuilder.Append("\":\""); 36 jsonBuilder.Append(dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """)); 37 jsonBuilder.Append("\","); 38 } 39 jsonBuilder.Remove(jsonBuilder.Length - 1, 1); 40 jsonBuilder.Append("},"); 41 } 42 jsonBuilder.Remove(jsonBuilder.Length - 1, 1); 43 jsonBuilder.Append("]"); 44 jsonBuilder.Append("}"); 45 return jsonBuilder.ToString(); 46 } 47 public static string DataTable2Json(System.Data.DataTable dt, int count) 48 { 49 System.Text.StringBuilder jsonBuilder = new System.Text.StringBuilder(); 50 jsonBuilder.Append("{"); 51 jsonBuilder.AppendFormat("\"total\":{0}, ", count); 52 jsonBuilder.Append("\"rows\":[ "); 53 for (int i = 0; i < dt.Rows.Count; i++) 54 { 55 jsonBuilder.Append("{"); 56 for (int j = 0; j < dt.Columns.Count; j++) 57 { 58 jsonBuilder.Append("\""); 59 jsonBuilder.Append(dt.Columns[j].ColumnName); 60 jsonBuilder.Append("\":\""); 61 jsonBuilder.Append(dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """)); 62 jsonBuilder.Append("\","); 63 } 64 jsonBuilder.Remove(jsonBuilder.Length - 1, 1); 65 jsonBuilder.Append("},"); 66 } 67 jsonBuilder.Remove(jsonBuilder.Length - 1, 1); 68 jsonBuilder.Append("]"); 69 jsonBuilder.Append("}"); 70 return jsonBuilder.ToString(); 71 } 72 public static string DataTableToJson(System.Data.DataTable dt) 73 { 74 StringBuilder Json = new StringBuilder(); 75 Json.Append("["); 76 if (dt.Rows.Count > 0) 77 { 78 for (int i = 0; i < dt.Rows.Count; i++) 79 { 80 Json.Append("{"); 81 for (int j = 0; j < dt.Columns.Count; j++) 82 { 83 Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":\"" + dt.Rows[i][j].ToString().Replace("\\", "\\\\").Replace("'", "'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>").Replace("\"", """) + "\""); 84 if (j < dt.Columns.Count - 1) 85 { 86 Json.Append(","); 87 } 88 } 89 Json.Append("}"); 90 if (i < dt.Rows.Count - 1) 91 { 92 Json.Append(","); 93 } 94 } 95 } 96 Json.Append("]"); 97 return Json.ToString().Replace("\\", "\\\\").Replace("\'", "\\\'").Replace("\t", " ").Replace("\r", " ").Replace("\n", "<br/>");//.Replace("\"", "'"); ; 98 } 99 100 /// <summary> 101 /// Table to JSON By FlexGrid 102 /// </summary> 103 /// <param name="ds"></param> 104 /// <param name="page"></param> 105 /// <returns></returns> 106 public static string DataTableToJson(System.Data.DataTable dt, int page, int total) 107 { 108 StringBuilder jsonStr = new StringBuilder(); 109 jsonStr.Append("{"); 110 jsonStr.Append("\"page\":" + page + ","); 111 jsonStr.Append("\"total\":" + total + ","); 112 jsonStr.Append("\"rows\":"); 113 jsonStr.Append("["); 114 115 foreach (System.Data.DataRow dr in dt.Rows) 116 { 117 jsonStr.Append("{"); 118 119 foreach (System.Data.DataColumn dc in dt.Columns) 120 { 121 jsonStr.Append("\""); 122 jsonStr.Append(dc.ColumnName); 123 jsonStr.Append("\""); 124 jsonStr.Append(":"); 125 126 jsonStr.Append("\""); 127 jsonStr.Append(dr[dc].ToString().Trim()); 128 jsonStr.Append("\" ,"); 129 } 130 131 jsonStr.Remove(jsonStr.Length - 1, 1); 132 jsonStr.Append("}"); 133 jsonStr.Append(","); 134 } 135 if (dt.Rows.Count > 0) 136 { 137 jsonStr.Remove(jsonStr.Length - 1, 1); 138 } 139 jsonStr.Append("]"); 140 jsonStr.Append("}"); 141 142 return jsonStr.ToString(); 143 } 144 145 /// <summary> 146 /// List轉成json 147 /// </summary> 148 /// <typeparam name="T"></typeparam> 149 /// <param name="jsonName"></param> 150 /// <param name="list"></param> 151 /// <returns></returns> 152 public static string ListToJson<T>(IList<T> list, string jsonName) 153 { 154 StringBuilder Json = new StringBuilder(); 155 if (string.IsNullOrEmpty(jsonName)) 156 jsonName = list[0].GetType().Name; 157 Json.Append("{\"" + jsonName + "\":["); 158 if (list.Count > 0) 159 { 160 for (int i = 0; i < list.Count; i++) 161 { 162 T obj = Activator.CreateInstance<T>(); 163 PropertyInfo[] pi = obj.GetType().GetProperties(); 164 Json.Append("{"); 165 for (int j = 0; j < pi.Length; j++) 166 { 167 Type type = pi[j].GetValue(list[i], null).GetType(); 168 Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(pi[j].GetValue(list[i], null).ToString(), type)); 169 170 if (j < pi.Length - 1) 171 { 172 Json.Append(","); 173 } 174 } 175 Json.Append("}"); 176 if (i < list.Count - 1) 177 { 178 Json.Append(","); 179 } 180 } 181 } 182 Json.Append("]}"); 183 return Json.ToString(); 184 } 185 186 /// <summary> 187 /// List轉成json 188 /// </summary> 189 /// <typeparam name="T"></typeparam> 190 /// <param name="list"></param> 191 /// <returns></returns> 192 public static string ListToJson<T>(IList<T> list) 193 { 194 object obj = list[0]; 195 return ListToJson<T>(list, obj.GetType().Name); 196 } 197 198 /// <summary> 199 /// 對象轉換為Json字元串 200 /// </summary> 201 /// <param name="jsonObject">對象</param> 202 /// <returns>Json字元串</returns> 203 public static string ToJson(object jsonObject) 204 { 205 string jsonString = "{"; 206 PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties(); 207 for (int i = 0; i < propertyInfo.Length; i++) 208 { 209 object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null); 210 string value = string.Empty; 211 if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan) 212 { 213 value = "'" + objectValue.ToString() + "'"; 214 } 215 else if (objectValue is string) 216 { 217 value = "'" + ToJson(objectValue.ToString()) + "'"; 218 } 219 else if (objectValue is IEnumerable) 220 { 221 value = ToJson((IEnumerable)objectValue); 222 } 223 else 224 { 225 value = ToJson(objectValue.ToString()); 226 } 227 jsonString += "\"" + ToJson(propertyInfo[i].Name) + "\":" + value + ","; 228 } 229 jsonString.Remove(jsonString.Length - 1, jsonString.Length); 230 return jsonString + "}"; 231 } 232 233 /// <summary> 234 /// 對象集合轉換Json 235 /// </summary> 236 /// <param name="array">集合對象</param> 237 /// <returns>Json字元串</returns> 238 public static string ToJson(IEnumerable array) 239 { 240 string jsonString = "["; 241 foreach (object item in array) 242 { 243 jsonString += ToJson(item) + ","; 244 } 245 jsonString.Remove(jsonString.Length - 1, jsonString.Length); 246 return jsonString + "]"; 247 } 248 249 /// <summary> 250 /// 普通集合轉換Json 251 /// </summary> 252 /// <param name="array">集合對象</param> 253 /// <returns>Json字元串</returns> 254 public static string ToArrayString(IEnumerable array) 255 { 256 string jsonString = "["; 257 foreach (object item in array) 258 { 259 jsonString = ToJson(item.ToString()) + ","; 260 } 261 jsonString.Remove(jsonString.Length - 1, jsonString.Length); 262 return jsonString + "]"; 263 } 264 265 /// <summary> 266 /// Datatable轉換為Json 267 /// </summary> 268 /// <param name="table">Datatable對象</param> 269 /// <returns>Json字元串</returns> 270 public static string ToJson(DataTable dt) 271 { 272 StringBuilder jsonString = new StringBuilder(); 273 jsonString.Append("["); 274 DataRowCollection drc = dt.Rows; 275 for (int i = 0; i < drc.Count; i++) 276 { 277 jsonString.Append("{"); 278 for (int j = 0; j < dt.Columns.Count; j++) 279 { 280 string strKey = dt.Columns[j].ColumnName; 281 string strValue = drc[i][j].ToString(); 282 Type type = dt.Columns[j].DataType; 283 jsonString.Append("\"" + strKey + "\":"); 284 strValue = StringFormat(strValue, type); 285 if (j < dt.Columns.Count - 1) 286 { 287 jsonString.Append(strValue + ","); 288 } 289 else 290 { 291 jsonString.Append(strValue); 292 } 293 } 294 jsonString.Append("},"); 295 } 296 jsonString.Remove(jsonString.Length - 1, 1); 297 jsonString.Append("]"); 298 return jsonString.ToString(); 299 } 300 301 /// <summary> 302 /// DataTable轉成Json 303 /// </summary> 304 /// <param name="jsonName"></param> 305 /// <param name="dt"></param> 306 /// <returns></returns> 307 public static string ToJson(DataTable dt, string jsonName) 308 { 309 StringBuilder Json = new StringBuilder(); 310 if (string.IsNullOrEmpty(jsonName)) 311 jsonName = dt.TableName; 312 Json.Append("{\"" + jsonName + "\":["); 313 if (dt.Rows.Count > 0) 314 { 315 for (int i = 0; i < dt.Rows.Count; i++) 316 { 317 Json.Append("{"); 318 for (int j = 0; j < dt.Columns.Count; j++) 319 { 320 Type type = dt.Rows[i][j].GetType(); 321 Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + StringFormat(dt.Rows[i][j].ToString(), type)); 322 if (j < dt.Columns.Count - 1) 323 { 324 Json.Append(","); 325 } 326 } 327 Json.Append("}"); 328 if (i < dt.Rows.Count - 1) 329 { 330 Json.Append(","); 331 } 332 } 333 } 334 Json.Append("]}"); 335 return Json.ToString(); 336 } 337 338 /// <summary> 339 /// DataReader轉換為Json 340 /// </summary> 341 /// <param name="dataReader">DataReader對象</param> 342 /// <returns>Json字元串</returns> 343 public static string ToJson(DbDataReader dataReader) 344 { 345 StringBuilder jsonString = new StringBuilder(); 346 jsonString.Append("
