Question

我正在开发航空座位图应用程序。但我无法一次更改多个按钮值。

我搜索了我的解决方案，但找不到我想要的。

我的序列是

选择我想要封锁的座位
选中时突出显示按钮
我将添加＆＃34; Save＆＃34;按钮。此按钮将所有选定的按钮值保存到数据库。
那是

这是我的动态按钮代码：

     private void GenerateSeats()
    {
        const int seatSpacing = 6;
        const int middleRowWidth = 50;
        const int seatWidth = 40;
        const int seatHeight = 30;
        char[] Seatletter = { 'A', 'B', 'C', 'D', 'E', 'F' };
        //panel1.Width = 6 * (seatHeight + seatSpacing) + seatSpacing + middleRowWidth;
        //panel1.Width = 1200;

        var buttonSize = new Size(seatWidth, seatHeight);

        for (int i = 0; i <= 155; i++)
        {
            int SeatRow = i / 6;
            for (int j = 0; j <= 5; j++)
            {
                int thisRow = i / 6;
                int thisColumn = j % 6;

                int seatTop = thisRow * (seatHeight + seatSpacing);
                int seatLeft = thisColumn * (seatWidth + seatSpacing);

                string SeatCode = (SeatRow + 1).ToString() + Seatletter[j];

                if (thisColumn >= 3) seatLeft += middleRowWidth;

                con.Open();
                cmd = new SqlCommand("select * from Passengers where seat = @checkseat", con);
                cmd.Parameters.AddWithValue("@checkseat", SeatCode);
                SqlDataReader Reader = cmd.ExecuteReader();

                Button SButton = new Button();
                SButton.Click += new EventHandler(SButton_Click);
                SButton.Size = buttonSize;
                SButton.BackgroundImageLayout = ImageLayout.Stretch;
                SButton.TextAlign = ContentAlignment.MiddleRight;
                SButton.Text = SeatCode;
                SButton.Location = new Point(seatTop, seatLeft);
                SeatMapPanel.Controls.Add(SButton);

                if (Reader.Read()) //Check seats (available or not)
                    {
                        SButton.BackgroundImage = Properties.Resources.CXV_blk_j;      //already reserved seats                      
                    }
                else 
                    {
                        SButton.BackgroundImage = Properties.Resources.CXV_def_j;    //Available seats
                    }
                con.Close();
            }
        }
    }

结果：

Answer 1

This way you can arrange your code and logic

获取所有可用座位
获取所有指定席位
获取所有不可用座位
获取所有被阻挡的席位

上述4个功能将为您提供有关例如座位号的信息，可以是

例如

 List<int> GetAllTheAvailableSeats() //You can return anything which is suitable
   {
       //your logic of database
   }

同样，您可以编写其他方法。

现在，一旦每个座位状态的数据可用，您就可以生成座椅面板。在这里，您不应该在代码中添加修改按钮。省略除生成之外的所有代码，例如

 private void GenerateSeats()
{
    const int seatSpacing = 6;
    const int middleRowWidth = 50;
    const int seatWidth = 40;
    const int seatHeight = 30;
    char[] Seatletter = { 'A', 'B', 'C', 'D', 'E', 'F' };
    //panel1.Width = 6 * (seatHeight + seatSpacing) + seatSpacing + middleRowWidth;
    //panel1.Width = 1200;

    var buttonSize = new Size(seatWidth, seatHeight);

    for (int i = 0; i <= 155; i++)
    {
        int SeatRow = i / 6;
        for (int j = 0; j <= 5; j++)
        {
            int thisRow = i / 6;
            int thisColumn = j % 6;

            int seatTop = thisRow * (seatHeight + seatSpacing);
            int seatLeft = thisColumn * (seatWidth + seatSpacing);

            string SeatCode = (SeatRow + 1).ToString() + Seatletter[j];

            if (thisColumn >= 3) seatLeft += middleRowWidth;

            Button SButton = new Button();
            SButton.Click += new EventHandler(SButton_Click);
            SButton.Size = buttonSize;
            SButton.BackgroundImageLayout = ImageLayout.Stretch;
            SButton.TextAlign = ContentAlignment.MiddleRight;
            SButton.Text = SeatCode;
            SButton.Location = new Point(seatTop, seatLeft);
            SeatMapPanel.Controls.Add(SButton);

        }
    }
}

完成座位生成后，您可以设置其状态，例如

public void SetSeatStatuses() 
{
   foreach(var seatinfo in AvailableSeats) //available seat  can be int or anything
    {
      var button =  SeatMapPanel.Controls[seatInfo] as Button;
      //set background images here
    }
}

类似地，对于其他状态。

注意： - 根据您的需要进行优化

C＃ - 在运行时选择多个按钮，并立即将值保存到数据库

1 个答案: