选择后,自动触发函数,根据所选值获取数据

1 protected void ddlMachineName_SelectedIndexChanged(object sender, EventArgs e) 2 { 3     DropDownList ddlMachineName = sender as DropDownList; 4     string text = ddlMachineName.SelectedValue; 5     MdMachineEntity entity = MdMachine.GetMdMachineByID(text); 6      //找到所在的行 7     int row=((GridViewRow)((DropDownList)sender).NamingContainer).RowIndex; 8     Label lblMachineID =  9             grdResult.Rows[row].FindControl("lblMachineID") as Label;10     lblMachineID.Text = entity.MachineID;11 }

 DropDownList添加change事件的时候,需要添加AutoPostBack=true,不然无法自动更新数据.