Windows 8.1或Windows Phone 8.1中的ComboBox所选项目

Question

i have xaml like this :

<ComboBox x:Name="cbProvince1" HorizontalAlignment="Left" Margin="674,481,0,0" VerticalAlignment="Top" Width="236" TabIndex="10">
            <ComboBoxItem Content="Alberta"/>
            <ComboBoxItem Content="British Columbia"/>
            <ComboBoxItem Content="Manitoba"/>
            <ComboBoxItem Content="New Brunswick"/>
            <ComboBoxItem Content="Newfoundland and Labrador"/>
            <ComboBoxItem Content="Nova Scotia"/>
            <ComboBoxItem Content="Ontario"/>
            <ComboBoxItem Content="Prince Edward Island"/>
            <ComboBoxItem Content="Quebec"/>
            <ComboBoxItem Content="Saskatchewan"/>
        </ComboBox>

when i do access the the selectedItem to C# i am not able to get the string value i wrote as content

var value = cbProvince1.SelectedItem;

i am not able to get value in c# .

Answer 1

You need to reference the Content property, not the control itself. However, as SelectedItem return an object, yo uneed to cast it to a ComboBoxItem :

string content = ((ComboBoxItem)cbProvince1.SelectedItem).Content.ToString();

Answer 2

Instead of making your items ComboBoxItem and then casting its content you can set it to array of string and then SelectedItem will be of string type. This will also work for Int32 , Double and other system types.

<ComboBox x:Name="cbProvince1" SelectedIndex="1" ...>
    <sys:String>Alberta</sys:String>
    <sys:String>British Columbia</sys:String>
    <sys:String>Manitoba</sys:String>
    <sys:String>New Brunswick</sys:String>
    <sys:String>Newfoundland and Labrador</sys:String>
    <sys:String>Nova Scotia</sys:String>
    <sys:String>Ontario</sys:String>
    <sys:String>Prince Edward Island</sys:String>
    <sys:String>Quebec</sys:String>
    <sys:String>Saskatchewan</sys:String>
</ComboBox>

you'll need to define sys namespace

xmlns:sys="clr-namespace:System;assembly=mscorlib"