init lserp cs 5.0

插件库/CommonLib/utils/JsonUtil.cs

@@ -0,0 +1,109 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Data;
+using System.Web.Script.Serialization;
+using System.Collections;
+
+namespace CommonLib {
+
+    /// <summary>
+    /// JSON转换帮助类
+    /// </summary>
+    public static class JsonUtil {
+
+        #region Json字符串转换为DataTable 实例方法
+        public static DataTable JsonToDataTable(String json) {
+            DataTable dt = ToDataTable(json);
+            return dt;
+        }
+        #endregion
+
+        #region DataTable 转换为Json 字符串
+        /// <summary>
+        /// DataTable 对象 转换为Json 字符串
+        /// </summary>
+        /// <param name="dt"></param>
+        /// <returns></returns>
+        public static string ToJson(this DataTable dt) {
+            JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
+            javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
+            ArrayList arrayList = new ArrayList();
+            foreach (DataRow dataRow in dt.Rows) {
+                Dictionary<string, object> dictionary = new Dictionary<string, object>();  //实例化一个参数集合
+                foreach (DataColumn dataColumn in dt.Columns) {
+                    dictionary.Add(dataColumn.ColumnName, dataRow[dataColumn.ColumnName].ToStr());
+                }
+                arrayList.Add(dictionary); //ArrayList集合中添加键值
+            }
+
+            return javaScriptSerializer.Serialize(arrayList);  //返回一个json字符串
+        }
+        #endregion
+
+        #region Json 字符串 转换为 DataTable数据集合
+        /// <summary>
+        /// Json 字符串 转换为 DataTable数据集合
+        /// </summary>
+        /// <param name="json"></param>
+        /// <returns></returns>
+        public static DataTable ToDataTable(this string json) {
+            DataTable dataTable = new DataTable();  //实例化
+            DataTable result;
+            try {
+                JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
+                javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
+                ArrayList arrayList = javaScriptSerializer.Deserialize<ArrayList>(json);
+                if (arrayList.Count > 0) {
+                    foreach (Dictionary<string, object> dictionary in arrayList) {
+                        if (dictionary.Keys.Count<string>() == 0) {
+                            result = dataTable;
+                            return result;
+                        }
+                        if (dataTable.Columns.Count == 0) {
+                            foreach (string current in dictionary.Keys) {
+                                dataTable.Columns.Add(current, dictionary[current].GetType());
+                            }
+                        }
+                        DataRow dataRow = dataTable.NewRow();
+                        foreach (string current in dictionary.Keys) {
+                            dataRow[current] = dictionary[current];
+                        }
+
+                        dataTable.Rows.Add(dataRow); //循环添加行到DataTable中
+                    }
+                }
+            }
+            catch {
+
+            }
+            result = dataTable;
+            return result;
+        }
+        #endregion
+
+        #region 转换为string字符串类型
+        /// <summary>
+        ///  转换为string字符串类型
+        /// </summary>
+        /// <param name="s">获取需要转换的值</param>
+        /// <param name="format">需要格式化的位数</param>
+        /// <returns>返回一个新的字符串</returns>
+        public static string ToStr(this object s, string format = "") {
+            string result = "";
+            try {
+                if (format == "") {
+                    result = s.ToString();
+                }
+                else {
+                    result = string.Format("{0:" + format + "}", s);
+                }
+            }
+            catch {
+            }
+            return result;
+        }
+        #endregion
+    }
+}