C# DataTable常见用法汇总

DataTable dt=new DataTable();如果带个String参数，此参数表示表名。

//数据库的Nvarchar等类型，在此可用String兼容。可不指明数据类型
DataColumn dc = new DataColumn("商品编号", typeof(system.string));

dt.Columns.Add(dc);

dt.Rows[i].SetField<int>(dc, int.Parse(hc.Values[i]);

dt.Rows.Add(dr.ItemArray);

DataTable ds=car.getGoods(v);	//从数据库里读出的表
dt.Merge(ds);	//将 ds 表合并到表 dt

dt = ds.Clone();

protected void Page_Load(object sender, EventArgs e)
{
    HttpCookie hc=Request.Cookies["goods"];
    DataTable dt = new DataTable();
    DataColumn dc1 = new DataColumn("商品编号");
    DataColumn dc2 = new DataColumn("商品名称");
    DataColumn dc3 = new DataColumn("商品重量");
    DataColumn dc4 = new DataColumn("商品价格");
    DataColumn dc5 = new DataColumn("购买数量");
    dt.Columns.Add(dc1);
    dt.Columns.Add(dc2);
    dt.Columns.Add(dc3);
    dt.Columns.Add(dc4);
    dt.Columns.Add(dc5);
    TemplateField fd = new TemplateField();
    fd.HeaderText = "数量";
    if (hc != null)
    {
      for (int i = 0; i < hc.Values.Count; i++)
      {
        string c = hc.Values.Keys[i];
        string v = c.Replace("goodName", "");
        DataTable ds=car.getGoods(v);
        DataRow dr=ds.Rows[0];
        // fd.ItemTemplate = new gr

        //dt = ds.Clone();
        //dt.Merge(ds);
        dt.Rows.Add(dr.ItemArray);
        dt.Rows[i].SetField<int>(dc5,int.Parse( hc.Values[i]));
        
        
      }
    
      GridView1.DataSource = dt;
      GridView1.DataKeyNames = new string[] {"商品编号"};
			GridView1.DataBind();
			dt.Dispose();
    }
  }