How do i get the text value from a ComboBox in WPF?

Question

This may be something covered in C# 101 but I haven\'t been able to find an easy to understand answer to this question anywhere on google or stack overflow. Is there a bett

Answer 1

It looks like you have ComboBoxItems in your ComboBox, so that SelectedValue is returning a ComboBoxItem and ToString is therefore returning something like ComboBox SomeValue.

If that's the case, you can get the content using ComboBoxItem.Content:

ComboBoxItem selectedItem = (ComboBoxItem)(test_site.SelectedValue);
string value = (string)(selectedItem.Content);

However, a better approach is, instead of populating the ComboBox with a collection of ComboBoxItems, to set ComboBox.ItemsSource to the desired collection of strings:

test_site.ItemsSource = new string[] { "Alice", "Bob", "Carol" };

Then SelectedItem will get you the currently selected string directly.

string selectedItem = (string)(test_site.SelectedItem);

Answer 2

On load events put

DependencyPropertyDescriptor dpd = DependencyPropertyDescriptor.FromProperty(ComboBox.TextProperty, typeof(ComboBox));

dpd.AddValueChanged(cmbChungChi, OnTextChanged);

And get text via funtion

private void OnTextChanged(object sender, EventArgs args)
{
    txtName.Text = cmbChungChi.Text;
} 

Good luck.