手动添加DataTable

          //创—ataTable             DataTable dt = new DataTable("zhaopian");            //添加列            DataColumn dc1 = new DataColumn("id", Type.GetType("System.String"));            DataColumn dc2 = new DataColumn("wenti", Type.GetType("System.String"));            DataColumn dc3 = new DataColumn("zhaopianming", Type.GetType("System.String"));            dt.Columns.Add(dc1);            dt.Columns.Add(dc2);            dt.Columns.Add(dc3);            //添加值            DataRow dr = dt.NewRow();            dr[0] = "1";            dr[1] = "测试";            dr[2] = "P123456.jpg";

然后将datatable 赋值给 Gridview

this.dataGrid1.DataSource = dt;