1 Asp.net DataTable添加列和行的方法 2 方法一: 3 4 DataTable tblDatas = new DataTable("Datas"); 5 DataColumn dc = null; 6 dc = tblDatas.Columns.Add("ID", Type.GetType("System.Int32")); 7 dc.AutoIncrement = true;//自动增加 8 dc.AutoIncrementSeed = 1;//起始为1 9 dc.AutoIncrementStep = 1;//步长为1 10 dc.AllowDBNull = false;// 11 12 dc = tblDatas.Columns.Add("Product", Type.GetType("System.String")); 13 dc = tblDatas.Columns.Add("Version", Type.GetType("System.String")); 14 dc = tblDatas.Columns.Add("Description", Type.GetType("System.String")); 15 16 DataRow newRow; 17 newRow = tblDatas.NewRow(); 18 newRow["Product"] = "大话西游"; 19 newRow["Version"] = "2.0"; 20 newRow["Description"] = "我很喜欢"; 21 tblDatas.Rows.Add(newRow); 22 23 newRow = tblDatas.NewRow(); 24 newRow["Product"] = "梦幻西游"; 25 newRow["Version"] = "3.0"; 26 newRow["Description"] = "比大话更幼稚"; 27 tblDatas.Rows.Add(newRow); 28 29 方法二: 30 31 DataTable tblDatas = new DataTable("Datas"); 32 tblDatas.Columns.Add("ID", Type.GetType("System.Int32")); 33 tblDatas.Columns[0].AutoIncrement = true; 34 tblDatas.Columns[0].AutoIncrementSeed = 1; 35 tblDatas.Columns[0].AutoIncrementStep = 1; 36 37 tblDatas.Columns.Add("Product", Type.GetType("System.String")); 38 tblDatas.Columns.Add("Version", Type.GetType("System.String")); 39 tblDatas.Columns.Add("Description", Type.GetType("System.String")); 40 41 tblDatas.Rows.Add(new object[]{null,"a","b","c"}); 42 tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); 43 tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); 44 tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); 45 tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); 46 47 方法三： 48 DataTable table = new DataTable (); 49 50 //创建table的第一列 51 DataColumn priceColumn = new DataColumn(); 52 //该列的数据类型 53 priceColumn.DataType = System.Type.GetType("System.Decimal"); 54 //该列得名称 55 priceColumn.ColumnName = "price"; 56 //该列得默认值 57 priceColumn.DefaultValue = 50; 58 59 // 创建table的第二列 60 DataColumn taxColumn = new DataColumn(); 61 taxColumn.DataType = System.Type.GetType("System.Decimal"); 62 //列名 63 taxColumn.ColumnName = "tax"; 64 //设置该列得表达式，用于计算列中的值或创建聚合列 65 taxColumn.Expression = "price * 0.0862"; 66 // Create third column. 67 DataColumn totalColumn = new DataColumn(); 68 totalColumn.DataType = System.Type.GetType("System.Decimal"); 69 totalColumn.ColumnName = "total"; 70 //该列的表达式，值是得到的是第一列和第二列值得和 71 totalColumn.Expression = "price + tax"; 72 73 // 将所有的列添加到table上 74 table.Columns.Add(priceColumn); 75 table.Columns.Add(taxColumn); 76 table.Columns.Add(totalColumn); 77 78 //创建一行 79 DataRow row = table.NewRow(); 80 //将此行添加到table中 81 table.Rows.Add(row); 82 83 //将table放在试图中 84 DataView view = new DataView(table); 85 dg.DataSource = view; 86 87 dg.DataBind();