DataTable添加列和行的三種方法

DataTable添加列和行的三種方法（點擊此行看原著）

           #region 方法一:  
          
DataTable tblDatas =new DataTable("Datas");  
          
DataColumn dc =null;  
          
dc = tblDatas.Columns.Add("ID", Type.GetType("System.Int32"));  
          
dc.AutoIncrement =true;//自動增加  
          
dc.AutoIncrementSeed =1;//起始為1  
          
dc.AutoIncrementStep =1;//步長為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"] ="這個地方是單元格的值";  
          
newRow["Version"] ="2.0";  
          
newRow["Description"] ="這個地方是單元格的值";  
          
tblDatas.Rows.Add(newRow);  
          
newRow = tblDatas.NewRow();  
          
newRow["Product"] ="這個地方是單元格的值";  
          
newRow["Version"] ="3.0";  
          
newRow["Description"] ="這個地方是單元格的值";  
          
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();  
          
//創建table的第一列  
          
DataColumn priceColumn =new DataColumn();  
          
priceColumn.DataType = System.Type.GetType("System.Decimal");//該列的數據類型  
          
priceColumn.ColumnName ="price";//該列得名稱  
          
priceColumn.DefaultValue =50;//該列得默認值  
          
// 創建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";//設置該列得表達式，用於計算列中的值或創建聚合列  
          
// 創建table的第三列  
          
DataColumn totalColumn =new DataColumn();  
          
totalColumn.DataType = System.Type.GetType("System.Decimal");  
          
totalColumn.ColumnName ="total";  
          
totalColumn.Expression ="price + tax";//該列的表達式，是第一列和第二列值得和  
          
// 將所有的列添加到table上  
          
table.Columns.Add(priceColumn);  
          
table.Columns.Add(taxColumn);  
          
table.Columns.Add(totalColumn);  
          
//創建一行  
          
DataRow row = table.NewRow();  
          
table.Rows.Add(row);//將此行添加到table中  
          
//將table放在視圖中  
          
DataView view =new DataView(table);  
          
//綁定到DataGrid  
          
dg.DataSource = view;  
          
dg.DataBind();  
          
#endregion