DataTable 转换成 Json的3种方法2

using System.Web.Script.Serialization; 

public string DataTableToJsonWithJavaScriptSerializer(DataTable table)
{
JavaScriptSerializer jsSerializer = new JavaScriptSerializer();
List < Dictionary < string, object >> parentRow = new List < Dictionary < string, object >> ();
Dictionary < string, object > childRow;
foreach(DataRow row in table.Rows)
{
childRow = new Dictionary < string, object > ();
foreach(DataColumn col in table.Columns)
{
childRow.Add(col.ColumnName, row[col]);
}
parentRow.Add(childRow);
}
return jsSerializer.Serialize(parentRow);
}