//创建DataTable

    DataTable dt = new DataTable("NewDt");

    //创建自增长的ID列

    DataColumn dc = dt.Columns.Add("ID", Type.GetType("System.Int32"));

    dc.AutoIncrement = true;   //自动增加

    dc.AutoIncrementSeed = ;  //起始为1

    dc.AutoIncrementStep = ;  //步长为1

    dc.AllowDBNull = false;    //非空

    //创建其它列表

    dt.Columns.Add(new DataColumn("Name", Type.GetType("System.String")));

    dt.Columns.Add(new DataColumn("Age", Type.GetType("System.Int32")));

    dt.Columns.Add(new DataColumn("Score", Type.GetType("System.Decimal")));

    dt.Columns.Add(new DataColumn("CreateTime", Type.GetType("System.DateTime")));

    //创建数据

    DataRow dr = dt.NewRow();

    dr["Name"] = "张三";

    dr["Age"] = ;

    dr["Score"] = 85.5;

    dr["CreateTime"] = DateTime.Now;

    dt.Rows.Add(dr);

    dr = dt.NewRow();

    dr["Name"] = "李四";

    dr["Age"] = ;

    dr["Score"] = ;

    dr["CreateTime"] = DateTime.Now;

    dt.Rows.Add(dr);

    dr = dt.NewRow();

    dr["Name"] = "王五";

    dr["Age"] = ;

    dr["Score"] = 63.5;

    dr["CreateTime"] = DateTime.Now;

    dt.Rows.Add(dr);