ASP.NET DataTable添加行的方法

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);

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 " });

方法三：
DataTable table = new DataTable ();

// 创建table的第一列
DataColumn priceColumn = new DataColumn();
// 该列的数据类型
priceColumn.DataType = System.Type.GetType( " System.Decimal " );
// 该列得名称
priceColumn.ColumnName = " price " ;
// 该列得默认值
priceColumn.DefaultValue = 50 ;

// 创建table的第二列
DataColumn taxColumn = new DataColumn();
taxColumn.DataType = System.Type.GetType( " System.Decimal " );
// 列名
taxColumn.ColumnName = " tax " ;
// 设置该列得表达式，用于计算列中的值或创建聚合列
taxColumn.Expression = " price * 0.0862 " ;
// Create third column.
DataColumn totalColumn = new DataColumn();
totalColumn.DataType = System.Type.GetType( " System.Decimal " );
totalColumn.ColumnName = " total " ;
// 该列的表达式，值是得到的是第一列和第二列值得和
totalColumn.Expression = " price + tax " ;

// 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();
// 将此行添加到table中
table.Rows.Add(row);

// GridView展示出来
this .GridView1.DataSource = tblDatas.DefaultView;
this .GridView1.DataBind();