第一种方式：直接添加数据对象

DataTable table = new DataTable();            table.Columns.Add("strName", Type.GetType("System.String"));            table.Columns.Add("strSex", Type.GetType("System.String"));            table.Columns.Add("strEmail", Type.GetType("System.String"));            table.Rows.Add(new object[] { "Tom", "男", "Tom@atguigu.com" });            table.Rows.Add(new object[] { "Lucy", "女", "Lucy@atguigu.com" });            table.Rows.Add(new object[] { "Jack", "男", "Jack@atguigu.com" });

 

第二种方式：用DataColumn无参构造方法创建列，然后New每行列的数据 

 

　　　　　　  DataTable table = new DataTable();            DataColumn strNameColumn = new DataColumn();//创建table的第一列            strNameColumn.DataType = System.Type.GetType("System.String");//该列的数据类型            strNameColumn.ColumnName = "strName";//该列得名称            DataColumn strSexColumn = new DataColumn();            strSexColumn.DataType = System.Type.GetType("System.String");            strSexColumn.ColumnName = "strSex";            DataColumn strEmailColumn = new DataColumn();            strEmailColumn.DataType = System.Type.GetType("System.String");            strEmailColumn.ColumnName = "strEmail";            // 将所有的列添加到table上            table.Columns.Add(strNameColumn);            table.Columns.Add(strSexColumn);            table.Columns.Add(strEmailColumn);            //添加数据            DataRow rowData = table.NewRow();            rowData["strName"] = "Tom";            rowData["strSex"] = "男";            rowData["strEmail"] = "Tom@atguigu.com";            table.Rows.Add(rowData);            rowData = table.NewRow();            rowData["strName"] = "Lucy";            rowData["strSex"] = "女";            rowData["strEmail"] = "Lucy@atguigu.com";            table.Rows.Add(rowData);            rowData = table.NewRow();            rowData["strName"] = "Jack";            rowData["strSex"] = "男";            rowData["strEmail"] = "Jack@atguigu.com";            table.Rows.Add(rowData);

 

第三种方式：用DataColumn有参构造方法创建列

 

DataTable dt = new DataTable();            DataColumn dc1 = new DataColumn("strName", Type.GetType("System.String"));            DataColumn dc2 = new DataColumn("strSex", Type.GetType("System.String"));            DataColumn dc3 = new DataColumn("strEmail", Type.GetType("System.String"));            dt.Columns.Add(dc1);            dt.Columns.Add(dc2);            dt.Columns.Add(dc3);            //添加三条数据　　　　            DataRow row = dt.NewRow();            row["strName"] = "Tom";            row["strSex"] = "男";            row["strEmail"] = "Tom@atguigu.com";            dt.Rows.Add(row);            row = dt.NewRow();            row["strName"] = "Lucy";            row["strSex"] = "女";            row["strEmail"] = "Lucy@atguigu.com";            dt.Rows.Add(row);            row = dt.NewRow();            row["strName"] = "Jack";            row["strSex"] = "男";            row["strEmail"] = "Jack@atguigu.com";            dt.Rows.Add(row);