数据绑定-在ComboBox中(相对于其他组合框) [英] Data Binding- in ComboBox(relative to other combo box)

问题描述

大家好，

我有两个组合框，需要相对于前一个组合框设置后一个组合框的值.
例如，
组合框(I)-值A，B和C
ComboBox(II)-值0、1、2、3、4、5、6、7、8、9

用户选择(I)和类型A-(II)-值0,1,2
用户选择(I)和类型B-(II)-值1 ... 9
在用户选择(I)和类型C-(III)-仅值9时，需要选择.

如何实现上述更改.任何帮助都是可观的.谢谢，



问候，
Samanth_90

Hi All,

I have two combo box, and need to set the values of latter combobox relative to the former combo box.
for eg.,
Combobox(I) - values A, B & C
ComboBox(II) - values 0, 1, 2 ,3,4,5,6,7,8,9

On user Selection of (I) and Type A- (II) - values 0,1,2
On user Selection of (I) and Type B- (II) - values 1...9
On User selection of (I) and Type C- (III) - values 9 Only, needs selection.

How to effect the said changes. Any help is appreciable. Thanks.,



With Regards,
Samanth_90

推荐答案

您需要具有SelectionChanged 事件处理程序:
XAML代码:

You need to have a SelectionChanged event handler :
XAML code :

<combobox height="23" horizontalalignment="Left" margin="12,41,0,0" name="comboBox1" verticalalignment="Top" width="120" selectionchanged="comboBox1_SelectionChanged">
            <comboboxitem content="A" />
            <comboboxitem content="B" />
            <comboboxitem content="C" />
        </combobox>
        <combobox height="23" horizontalalignment="Left" margin="12,84,0,0" name="comboBox2" verticalalignment="Top" width="120" />

背后的代码:

在(窗口，页面或用户控件的)Loaded 事件处理程序中:

Code behind :

in Loaded event handler (of your Window or Page or User Control) :

comboBox1.SelectedIndex = 0;

和SelectionChanged 事件处理程序:

and the SelectionChanged event handler :

private void comboBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    if (comboBox2 == null)
        return;

    switch (comboBox1.SelectedIndex)
    {
        case 0:
            comboBox2.ItemsSource = new List<int> { 0, 1, 2 };
            break;
        case 1:
            comboBox2.ItemsSource = new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
            break;
        case 2:
            comboBox2.ItemsSource = new List<int> { 9 };
            break;
    }

    comboBox2.SelectedIndex = 0;
}

希望对您有所帮助.

Hope it helps.

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