DataTable,List，Dictonary互转，筛选及相关写法

1.创建自定义DataTable 

/// 创建自定义DataTable(一) 根据列名字符串数组，
/// </summary>
/// <param name="sList">列名字符串数组</param>
/// <returns>DataTable</returns>
public static DataTable CreateSelfDataTable(String[] sList)
{
DataTable _dtSelf = new DataTable();

foreach (String s in sList)
{
_dtSelf.Columns.Add(s);
}
_dtSelf.AcceptChanges();

return _dtSelf;
}


--创建自定义DataTable(二) 
DataTable dt=new DataTable();
dt.Columns.AddRange(new[]
{
new DataColumn("col1",typeof(int)),
new DataColumn("col2",typeof(string)),
new DataColumn("col3",typeof(string))
});

dt.Rows.Add(1,"001","李小龙");
dt.Rows.Add(2,"002","猛龙过江");

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