C#中把Json数据转为DataTable
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简单
/// <summary>
/// 将json转换为DataTable
/// </summary>
/// <param name="strJson">得到的json</param>
/// <returns></returns>
public static DataTable JsonToDT(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;
}处理不规则
/// <summary>
/// Json 字符串 转换为 DataTable数据集合
/// </summary>
/// <param name="json"></param>
/// <returns></returns>
public static DataTable ToDataTable(string json)
{
DataTable dataTable = new DataTable(); //实例化
DataTable result;
try
{
dataTable.Columns.Add("id");
dataTable.Columns.Add("mac");
dataTable.Columns.Add("rssi");
dataTable.Columns.Add("ch");
dataTable.Columns.Add("ts");
dataTable.Columns.Add("tmc");
dataTable.Columns.Add("tc");
dataTable.Columns.Add("ds");
dataTable.Columns.Add("essid");
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;
}//Rows
string root = "";
foreach (string current in dictionary.Keys)
{
if (current != "data")
root = current;
else
{
ArrayList list = dictionary[current] as ArrayList;
foreach (Dictionary<string, object> dic in list)
{
DataRow dataRow = dataTable.NewRow();
dataRow[root] = dictionary[root];
foreach (string key in dic.Keys)
{
dataRow[key] = dic[key];
}
dataTable.Rows.Add(dataRow);
}
}
}
}
}
}
catch
{
}
result = dataTable;
return result;
}处理复杂
/// <summary>
/// Json 字符串 转换为 DataTable数据集合
/// </summary>
/// <param name="json"></param>
/// <returns></returns>
public static DataTable ToDataTable(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;
}
//Columns
if (dataTable.Columns.Count == 0)
{
foreach (string current in dictionary.Keys)
{
if (current != "data")
dataTable.Columns.Add(current, dictionary[current].GetType());
else
{
ArrayList list = dictionary[current] as ArrayList;
foreach (Dictionary<string, object> dic in list)
{
foreach (string key in dic.Keys)
{
dataTable.Columns.Add(key, dic[key].GetType());
}
break;
}
}
}
}
//Rows
string root = "";
foreach (string current in dictionary.Keys)
{
if (current != "data")
root = current;
else
{
ArrayList list = dictionary[current] as ArrayList;
foreach (Dictionary<string, object> dic in list)
{
DataRow dataRow = dataTable.NewRow();
dataRow[root] = dictionary[root];
foreach (string key in dic.Keys)
{
dataRow[key] = dic[key];
}
dataTable.Rows.Add(dataRow);
}
}
}
}
}
}
catch
{
}
result = dataTable;
return result;
}到此这篇关于C#中把Json数据转为DataTable的文章就介绍到这了。希望对大家的学习有所帮助，也希望大家多多支持编程网。
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