JSON格式互转集合
将JSON转换成DataTable、DataSet或是List等,也有可能将DataTable、DataSet或是List转换成JSON的
代码:
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: 在此处添加构造函数逻辑
19 //
20 }
21 /// <summary>
/// 将json转换为DataTable
/// </summary>
/// <param name="strJson">得到的json</param>
/// <returns></returns>
private DataTable JsonToDataTable(string strJson)
{
//转换json格式
strJson = strJson.Replace(",\"", "*\"").Replace("\":", "\"#").ToString();
//取出表名
var rg = new Regex(@"(?<={)[^:]+(?=:\[)", RegexOptions.IgnoreCase);
string strName = rg.Match(strJson).Value;
DataTable tb = null;
//去除表名
strJson = strJson.Substring(strJson.IndexOf("[") + 1);
strJson = strJson.Substring(0, strJson.IndexOf("]"));
//获取数据
rg = new Regex(@"(?<={)[^}]+(?=})");
MatchCollection mc = rg.Matches(strJson);
for (int i = 0; i < mc.Count; i++)
{
string strRow = mc[i].Value;
string[] strRows = strRow.Split('*');
//创建表
if (tb == null)
{
tb = new DataTable();
tb.TableName = strName;
foreach (string str in strRows)
{
var dc = new DataColumn();
string[] strCell = str.Split('#');
if (strCell[0].Substring(0, 1) == "\"")
{
int a = strCell[0].Length;
dc.ColumnName = strCell[0].Substring(1, a - 2);
}
else
{
dc.ColumnName = strCell[0];
}
tb.Columns.Add(dc);
}
tb.AcceptChanges();
}
//增加内容
DataRow dr = tb.NewRow();
for (int r = 0; r < strRows.Length; r++)
{
dr[r] = strRows[r].Split('#')[1].Trim().Replace(",", ",").Replace(":", ":").Replace("\"", "");
}
tb.Rows.Add(dr);
tb.AcceptChanges();
}
return tb;
}
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("\\", "\\\\