WPF- How to get Listbox item and selectedvalue from a data bound ListBox

Question

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Hi Friends,

Anyone please let me know how to get the selected value and item from a data bound ListBox

Please help me, Thanks in advance.

XAML code

XML

<ListBox x:Name="listbox1" Width="150" ItemsSource="{Binding Things}" DisplayMemberPath="department_name" SelectedValuePath="department_id" Margin="12,35,326,12"  />

C#
Data binding with Dataset

C#

listbox1.DisplayMemberPath = "department_name";
listbox1.SelectedValuePath = "department_id";
listbox1.ItemsSource = ds.Tables[0].DefaultView;

Output

F#

MessageBox.Show(listbox1.Items.CurrentItem.ToString());//Output -System.Data.DataRowView
MessageBox.Show(listbox1.SelectedItem.ToString());////Output -System.Data.DataRowView
MessageBox.Show(listbox1.SelectedValue.ToString());//Object reference not set to an instance of an object.

Posted 6-Jan-15 0:22am

Znaneswar K

Updated 6-Jan-15 0:25am

v2

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Comments

Arjsrya 6-Jan-15 6:38am

Did you try this?

listbox1.SelectedItem.Value

Znaneswar K 6-Jan-15 6:44am

Yeah i tried but its not working.

Christian Amado 6-Jan-15 6:50am

Have you got a Selected item in your listbox? Did you selected any item in your listbox?

Znaneswar K 6-Jan-15 6:53am

Yeah i have selected the item.
I have tried this one at listbox1_SelectionChanged event and also at onMouseClick.

Znaneswar K 6-Jan-15 6:55am

listbox1.SelectedIndex working fine. But i need selectedvalue and selecteditem.

1 solution

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Christian Amado · Accepted Answer · 2015-01-06T00:54:00

Hi kznaneswar, Have you got any selected item in your ListBox?

C#

MessageBox.Show(listbox1.SelectedValue != null ? listbox1.SelectedValue.ToString() : "I have 0 selected item!"); // If the selected value is null print a custom message.

Edit(based on your comment).-
Inside your Selection_Changed event write this:

C#

if (listbox1.SelectedItem!=null)
{
    MessageBox.Show(listbox1.Items.CurrentItem.ToString());//Output -System.Data.DataRowView
    MessageBox.Show(listbox1.SelectedItem.ToString());////Output -System.Data.DataRowView
    MessageBox.Show(listbox1.SelectedValue != null ? listbox1.SelectedValue.ToString() : "I have 0 selected item!");
}

Another approach. This going to work!

C#

if (listbox1.SelectedItem!=null)
{
    DataRowView d1=listbox1.SelectedItem as DataRowView;
    MessageBox.Show(d1["department_id"].tostring());
}

Hope it helps.