3.处理不规则Json，因为列并不确定，所以直接定义列，不动态生成
[{"id":"00e58d53","data":[{"mac":"34:b3:54:89:86:64","rssi":"-86","ch":"13"},{"mac":"50:bd:5f:02:80:44","rssi":"-90","ch":"1"}]},
{"id":"00ccda81","data":[{"mac":"bc:46:99:4e:96:c8","rssi":"-92","ch":"1"},{"mac":"bc:3a:ea:fc:77:6c","rssi":"-93","ch":"6","ds":"Y","essid":"vienna hotel WIFI"}]}]
/// <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;
}
二、导出Excel
/// <summary>
/// 导出Excel
/// </summary>
/// <param name="table"></param>
/// <param name="file"></param>
public void dataTableToCsv(DataTable table, string file)
{
string title = "";
FileStream fs = new FileStream(file, FileMode.OpenOrCreate);
StreamWriter sw = new StreamWriter(new BufferedStream(fs), System.Text.Encoding.Default);
for (int i = 0; i < table.Columns.Count; i++)
{
title += table.Columns[i].ColumnName + " "; //栏位：自动跳到下一单元格
}
title = title.Substring(0, title.Length - 1) + "
";
sw.Write(title);
foreach (DataRow row in table.Rows)
{
string line = "";
for (int i = 0; i < table.Columns.Count; i++)
{
line += row[i].ToString().Trim() + " "; //内容：自动跳到下一单元格
}
line = line.Substring(0, line.Length - 1) + "
";
sw.Write(line);
}
sw.Close();
fs.Close();
}
