将复选框连接到组合框C#GUI [英] Connecting checkbox to combobox C# GUI

问题描述

你好，
我正在尝试将复选框与选定的组合框连接起来，但是我不确定如何将其连接到阵列.
有人可以帮忙吗?

这是代码.

Hello,
I''m trying to connect the checkbox with the selected combobox but I''m just not sure how to connect it to the arrays.
Can someone please help?

Here''s the code.

string[] regionType = { "Europe", "Asia", "Australia" };
double[] rate = { 1950.00, 2250.00, 2550.00 };

        double regionRate,
               airfareCost = 0.0;

        public Form1()
        {
            InitializeComponent();
        }
        
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) 
        {
            int index;
            index = cboReg.SelectedIndex;
            regionRate = rate[index];
            displayRate();
        }
        private void displayRate()
        {
            txtPriceLand.Text = regionRate.ToString("C");
        }
        
        private void Form1_Load(object sender, EventArgs e)
        {
            cboReg.Items.AddRange(regionType);
        }
        private void chkYes_CheckedChanged(object sender, EventArgs e)
        {
          
        }

[Edited]代码包装在"pre"标签中[/Edited]

code is wrapped in "pre" tags[/Edited]

推荐答案

您也可以执行以下操作:

you can also do this:

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    if (chkYes.Checked)
    {
        regionRate = rate[cboReg.SelectedIndex];
        displayRate();
    }
}

如果您希望在复选框的检查更改事件中发生这种情况，请从comboBox1_SelectedIndexChanged事件中删除所有代码，然后将其粘贴到chkYes_checkedChanged方法中.像这样:

if you want that to happen on checkbox''s check change event remove all code from comboBox1_SelectedIndexChanged event and paste it to chkYes_checkedChanged method. like this:

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    //nothing here
}
private void chkYes_CheckedChanged(object sender, EventArgs e)
{
    //Make sure cboReg.SelectedIndex is >= 0 because if nothing is selected
    //it will be -1 and that will cause an exception
    if (chkYes.Checked && cboReg.SelectedIndex >= 0)
    {
        regionRate = rate[cboReg.SelectedIndex];
        displayRate();
    }
}

谢谢，
提示

Thanks,
Hemant

这里是解决方案:设置属性Autopostback = True

Here is the solution: Set your properties Autopostback = True

private void chkYes_CheckedChanged(object sender, EventArgs e)
            {
if (chkYes.checked == true && comboBox1.SelectedValue ="Europe" )
{
 txtPriceLand.Text = "1950.00"
}
else if (chkYes.checked == true && comboBox1.SelectedValue ="Asia" )
{
 txtPriceLand.Text = "2250.00"
}

}.


这对您来说要容易得多.

} .


this is much easier for you.

这篇关于将复选框连接到组合框C#GUI的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！