1。DataSet或DataTable建EasyUI树Json结构
其实网上已经有很健全的资料了，不过大多都是限制输出某字段的，所有我参考博客园某些博友代码，稍加修改一下：
1 /// <summary> 2 /// 根据DataSet构建树Json结构 3 /// </summary> 4 /// <param name="dataSet">数据集</param> 5 /// <param name="treeResult">返回树结构json字符串</param> 6 /// <param name="rootField">根（父类）字段名称，父类的Id字段名称</param> 7 /// <param name="rootValue">根（父类）值，父类的值</param> 8 /// <param name="parRelationField">父类与子类对应关系字段名称，例行的parentId字段名称</param> 9 /// <returns>Json字符串</returns> 10 public static void GetTreeJsonByTable(DataSet dataSet, StringBuilder treeResult, string rootField, string rootValue, string parRelationField) 11 { 12 DataTable dataTable = dataSet.Tables[0]; 13 GetTreeJsonByTable(dataTable, treeResult, rootField, rootValue, parRelationField); 14 } 15 16 /// <summary> 17 /// 根据Table构建树Json结构 18 /// </summary> 19 /// <param name="dataTable">数据表</param> 20 /// <param name="treeResult">返回树结构json字符串</param> 21 /// <param name="rootField">根（父类）字段名称，父类的Id字段名称</param> 22 /// <param name="rootValue">根（父类）值，父类的值</param> 23 /// <param name="parRelationField">父类与子类对应关系字段名称，例行的parentId字段名称</param> 24 /// <returns>Json字符串</returns> 25 public static void GetTreeJsonByTable(DataTable dataTable, StringBuilder treeResult, string rootField, string rootValue, string parRelationField) 26 { 27 if (dataTable.Rows.Count > 0) 28 { 29 treeResult.Append("["); 30 string filer = string.Format("{0}='{1}'", parRelationField, rootValue); 31 DataRow[] dataRows = dataTable.Select(filer); 32 if (dataRows.Length > 0) 33 { 34 foreach (DataRow dataRow in dataRows) 35 { 36 treeResult.Append("{"); 37 foreach (DataColumn dataColumn in dataTable.Columns) 38 { 39 treeResult.AppendFormat("\"{0}\":\"{1}\",", dataColumn.ColumnName, dataRow[dataColumn.ColumnName]); 40 } 41 treeResult = treeResult.Remove(treeResult.Length - 1, 1); 42 treeResult.Append(",\"state\":\"open\""); 43 44 string rootVal = dataRow[rootField].ToString(); 45 if (dataTable.Select(string.Format("{0}='{1}'", parRelationField, rootVal)).Length > 0) 46 { 47 treeResult.Append(",\"children\":"); 48 GetTreeJsonByTable(dataTable, treeResult, rootField, rootVal, parRelationField); 49 } 50 treeResult.Append("},"); 51 } 52 treeResult = treeResult.Remove(treeResult.Length - 1, 1); 53 } 54 treeResult.Append("]"); 55 } 56 }
调用方法：
1 StringBuilder monthModelJson = new StringBuilder(); 2 EasyUIHelper.GetTreeJsonByTable(ds.Tables[0], monthModelJson, "itemGuid", rootGuid, "parentGuid");