DataTable.Select()使用

 DataTable dt = new DataTable();

        DataColumn dc = new DataColumn();
        dc.ColumnName = "ID";
        dc.DataType = Type.GetType("System.Int32");

        DataColumn dc2 = new DataColumn();
        dc2.ColumnName = "Name";
        dc2.DataType = Type.GetType("System.String");

        dt.Columns.Add(dc);
        dt.Columns.Add(dc2);

        DataRow dr = dt.NewRow();

        dr[0] = 1;
        dr[1] = "MJ";

        DataRow dr2 = dt.NewRow();
        dr2[0] = 2;
        dr2["Name"] = "LY";

        dt.Rows.Add(dr);
        dt.Rows.Add(dr2);

        GridView1.DataSource = dt;
        GridView1.DataBind();

        DataRow[] dr3 = dt.Select("Name='MJ'");

        DataTable dt2 = dt.Clone();

        /*DataColumn dc3 = new DataColumn();
        dc3.ColumnName = "ID";
        dc3.DataType = Type.GetType("System.Int32");

        DataColumn dc4 = new DataColumn();
        dc4.ColumnName = "Name";
        dc4.DataType = Type.GetType("System.String");

        dt2.Columns.Add(dc3);
        dt2.Columns.Add(dc4);*/

        for (int i=0;i<dr3.Length;i++)
        {
            dt2.ImportRow(dr3[i]);
        }

        if (dt2.Rows.Count > 0)
        {
            foreach (DataRow dr5 in dt2.Rows)
            {
                Response.Write(dr5[0].ToString());
            }
        }

        GridView2.DataSource = dt2;
        GridView2.DataBind();

        Response.Write(dr3[0]["ID"].ToString());