【下载文档:  asp DataTable添加列和行的三种方法.txt 】

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asp DataTable添加列和行的三种方法
复制代码 代码如下: #region 方法一: DataTable tblDatas = new DataTable("Datas"); DataColumn dc = null; dc = tblDatas.Columns.Add("ID", Type.GetType("System.Int32")); dc.AutoIncrement = true;//自动增加 dc.AutoIncrementSeed = 1;//起始为1 dc.AutoIncrementStep = 1;//步长为1 dc.AllowDBNull = false; dc = tblDatas.Columns.Add("Product", Type.GetType("System.String")); dc = tblDatas.Columns.Add("Version", Type.GetType("System.String")); dc = tblDatas.Columns.Add("Description", Type.GetType("System.String")); DataRow newRow; newRow = tblDatas.NewRow(); newRow["Product"] = "大话西游"; newRow["Version"] = "2.0"; newRow["Description"] = "我很喜欢"; tblDatas.Rows.Add(newRow); newRow = tblDatas.NewRow(); newRow["Product"] = "梦幻西游"; newRow["Version"] = "3.0"; newRow["Description"] = "比大话更幼稚"; tblDatas.Rows.Add(newRow); #endregion 复制代码 代码如下: #region 方法二: DataTable tblDatas = new DataTable("Datas"); tblDatas.Columns.Add("ID", Type.GetType("System.Int32")); tblDatas.Columns[0].AutoIncrement = true; tblDatas.Columns[0].AutoIncrementSeed = 1; tblDatas.Columns[0].AutoIncrementStep = 1; tblDatas.Columns.Add("Product", Type.GetType("System.String")); tblDatas.Columns.Add("Version", Type.GetType("System.String")); tblDatas.Columns.Add("Description", Type.GetType("System.String")); tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); #endregion 复制代码 代码如下: #region 方法三： DataTable table = new DataTable(); //创建table的第一列 DataColumn priceColumn = new DataColumn(); priceColumn.DataType = System.Type.GetType("System.Decimal");//该列的数据类型 priceColumn.ColumnName = "price";//该列得名称 priceColumn.DefaultValue = 50;//该列得默认值 // 创建table的第二列 DataColumn taxColumn = new DataColumn(); taxColumn.DataType = System.Type.GetType("System.Decimal"); taxColumn.ColumnName = "tax";//列名 taxColumn.Expression = "price * 0.0862";//设置该列得表达式，用于计算列中的值或创建聚合列 // 创建table的第三列 DataColumn totalColumn = new DataColumn(); totalColumn.DataType = System.Type.GetType("System.Decimal"); totalColumn.ColumnName = "total"; totalColumn.Expression = "price + tax";//该列的表达式，是第一列和第二列值得和 // 将所有的列添加到table上 table.Columns.Add(priceColumn); table.Columns.Add(taxColumn); table.Columns.Add(totalColumn); //创建一行 DataRow row = table.NewRow(); table.Rows.Add(row);//将此行添加到table中 //将table放在试图中 DataView view = new DataView(table); //绑定到DataGrid dg.DataSource = view; dg.DataBind(); #endregion