C＃winform ComboBox

Question

我在C＃Winform上有一个组合框，我想用这个列表中的字符串名称变量填充，没有别的。这是列表代码。

class Animals
{
    public string averageMass { get; set; }
    public string lifeSpan { get; set; }
    public string whereToFind { get; set; }
    public string name { get; set; }
    public string animalImage { get; set; }
}
class Mammals:Animals
{
    public static List<Mammals> MammalList = new List<Mammals>();
    public string hairColour { get; set; }
}

Answer 1

您可以根据DataSource事件处理程序中ListBox2的选择设置ListBox1's SelectedIndexChanged，如下所示：

    private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if(listBox1.SelectedIndex==0)//Which is Mammals list
        {
            listBox2.DataSource = reptileList;
        }
        else//Which is Reptiles list
        {
            listBox2.DataSource = mammalList;
        }
    }

Answer 2

你可以在Combobox上执行此操作：

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (comboBox1.SelectedItem == "Mammals") //You can also do index e.g. comboBox1.SelectedIndex == 0
        {
            comboBox2.DataSource = mammalList;
        }
        else
        {
            comboBox2.DataSource = reptileList;
        }
    }

或者您也可以这样做：

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        comboBox2.DataSource = fncGetSpecies(comboBox1.SelectedIndex);
    }

    private string[] fncGetSpecies(int intIndex)
    {
        //This will return if selected item is 0 which is Mammals or 1 if the selected item is Reptiles.
        return intIndex == 0 ? mammalList : reptileList;
    }

Answer 3

您可以使用以下代码

将字符串项添加到组合框

combobox.Items.Add(stringItem);