WPF combobox SelectedValue binding to string

I've bound my ComboBox SelectedValue to a string in my codebehind, but when the value is set, the s开发者_如何学Ctring becomes a ComboBoxItem. How do I just bind the selected value as a string?

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This is probably because you have ComboBoxItem objects as items in your ComboBox and string is a content of each ComobBoxItem. So try setting SelectedValuePath to "Content" on your ComboBox:

<ComboBox SelectedValuePath="Content" .../>