DropDownList选择自动更新数据

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.