#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1dc.AutoIncrementStep =1;//步长为1dc.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"] ="这个地方是单元格的值";newRow["Version"] ="2.0";newRow["Description"] ="这个地方是单元格的值";tblDatas.Rows.Add(newRow);newRow = tblDatas.NewRow();newRow["Product"] ="这个地方是单元格的值";newRow["Version"] ="3.0";newRow["Description"] ="这个地方是单元格的值";tblDatas.Rows.Add(newRow);#endregion

#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(newobject[] { null, "a", "b", "c" });tblDatas.Rows.Add(newobject[] { null, "a", "b", "c" });tblDatas.Rows.Add(newobject[] { null, "a", "b", "c" });tblDatas.Rows.Add(newobject[] { null, "a", "b", "c" });tblDatas.Rows.Add(newobject[] { null, "a", "b", "c" });#endregion

#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 =http://www.mamicode.com/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放在视图中DataView view =new DataView(table);//绑定到DataGriddg.DataSource = view;dg.DataBind();#endregion