gridview 横向显示

思路：从数据库中先获取数据源，然后把数据源的table表横向显示

            DataTable dt = ds.Tables[0];//获取数据源中的表
            DataTable dtNew = new DataTable();
            dtNew.Columns.Add("ColName", typeof(string));//添加新列用以显示标题
            for (int i = 0; i < dt.Rows.Count; i++)//为新Table生成列
            {
                dtNew.Columns.Add("Column" + (i + 1).ToString(), typeof(string));
            }

            foreach (DataColumn dc in dt.Columns)
            {
                DataRow drNew = dtNew.NewRow();
                drNew["ColName"] = dc.ColumnName;
               
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    drNew[i + 1] = dt.Rows[i][dc].ToString();
                }
                dtNew.Rows.Add(drNew);
            }
            gvTableConvert.ShowHeader = false;
            gvTableConvert.DataSource = dtNew;
            gvTableConvert.DataBind();