Get selected value from combo box in C WPF

Question

I have just started using WPF forms instead of Windows Forms forms  In a Windows Forms form I could just do   ComboBox SelectedValue toString      And this would work fine   How do I do this in WPF  It doesn t seem to have the option

User · Answer

Solving this problem is simple  All I did was to add  SelectedValuePath  to my XAML code and bind it to my model property that I want to return with the combobox    lt ComboBox SelectedValuePath   Department            DisplayMemberPath   Department            Height  23            HorizontalAlignment  Left            ItemsSource   Binding             Margin  -58 1 0 5            Name   DepartmentComboBox            VerticalAlignment  Center            Width  268   gt

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Well   I found a simpler solution   String s   comboBox1 Text    This way I get the selected value as string

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How about these   string yourstringname    yourComboBox SelectedItem as ComboBoxItem  Content ToString

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Write it like this   String CmbTitle    cmb SelectedItem as ComboBoxItem  Content ToString

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I have figured it out a bit of a strange way of doing it compared to the old WF forms   ComboBoxItem typeItem    ComboBoxItem cboType SelectedItem  string value   typeItem Content ToString

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It works for me   System Data DataRowView typeItem    System Data DataRowView ComboBoxName SelectedItem  string value   typeItem DataView ToTable  a   Rows 0  0  ToString

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MsgBox cmbCut SelectedValue   ToString

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It depends what you bound to your ComboBox   If you have bound an object called MyObject  and have  let s say  a property called Name do the following   MyObject mo   myListBox SelectedItem as MyObject  return mo Name

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Create a ComboBox SelectionChanged Event and set ItemsSource   Binding   in the WPF design   Code   private void comboBox1 SelectionChanged object sender  SelectionChangedEventArgs e        string ob     DataRowView comboBox1 SelectedItem  Row ItemArray 0  ToString        MessageBox Show ob

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XAML    lt ComboBox Height  23  HorizontalAlignment  Left  Margin  19 123 0 0  Name  comboBox1  VerticalAlignment  Top  Width  33  ItemsSource   Binding   AllowDrop  True  AlternationCount  1  gt       lt ComboBoxItem Content  1  Name  ComboBoxItem1    gt       lt ComboBoxItem Content  2  Name  ComboBoxItem2    gt       lt ComboBoxItem Content  3  Name  ComboBoxItem3    gt   lt  ComboBox gt      C    if  ComboBoxItem1 IsSelected           Your code   else if  ComboBoxItem2 IsSelected           Your code   else if ComboBoxItem3 IsSelected           Your code

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My XAML is as below    lt ComboBox Grid Row  2  Grid Column  1  Height  25  Width  200  SelectedIndex  0  Name  cmbDeviceDefinitionId  gt       lt ComboBoxItem Content  United States  Name  US  gt  lt  ComboBoxItem gt       lt ComboBoxItem Content  European Union  Name  EU  gt  lt  ComboBoxItem gt       lt ComboBoxItem Content  Asia Pacific  Name  AP  gt  lt  ComboBoxItem gt   lt  ComboBox gt    The content is showing as text and the name of the WPF combobox  To get the name of the selected item  I have follow this line of code   ComboBoxItem ComboItem    ComboBoxItem cmbDeviceDefinitionId SelectedItem  string name   ComboItem Name    To get the selected text of a WPF combobox   string name   cmbDeviceDefinitionId SelectionBoxItem ToString

User · Answer

I use this code  and it works for me   DataRowView typeItem    DataRowView myComboBox SelectedItem   string value   typeItem Row 0  ToString

User · Answer

To get the value of the ComboBox s selected index in C  use   Combobox SelectedValue

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As a variant in the ComboBox SelectionChanged event handler   private void ComboBoxName SelectionChanged object send           string s   ComboBoxName Items GetItemAt ComboBoxName SelectedIndex  ToString

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This largely depends on how the box is being filled   If it is done by attaching a DataTable  or other collection  to the ItemsSource  you may find attaching a SelectionChanged event handler to your box in the XAML and then using this in the code-behind useful   private void ComboBoxName SelectionChanged object sender  SelectionChangedEventArgs e        ComboBox cbx    ComboBox sender      string s     DataRowView cbx Items GetItemAt cbx SelectedIndex   Row ItemArray 0  ToString        I saw 2 other answers on here that had different parts of that - one had ComboBoxName Items GetItemAt ComboBoxName SelectedIndex  ToString     which looks similar but doesn t cast the box to a DataRowView  something I found I needed to do  and another    DataRowView comboBox1 SelectedItem  Row ItemArray 0  ToString     used  SelectedItem instead of  Items GetItemAt comboBox1 SelectedIndex    That might ve worked  but what I settled on was actually the combination of the two I wrote above  and don t remember why I avoided  SelectedItem except that it must not have worked for me in this scenario     If you are filling the box dynamically  or with ComboBoxItem items in the dropdown directly in the XAML  this is the code I use   private void ComboBoxName SelectionChanged object sender  SelectionChangedEventArgs e        ComboBox cbx    ComboBox sender      string val   String Empty      if  cbx SelectedValue    null          val   cbx SelectionBoxItem ToString        else         val   cboParser cbx SelectedValue ToString         You ll see I have cboParser  there   This is because the output from SelectedValue looks like this   System Windows Controls Control  Some Value   At least it did in my project   So you have to parse your Some Value out of that   private static string cboParser string controlString        if  controlString Contains                     controlString   controlString Split      1  TrimStart                 return controlString      But this is why there are so many answers on this page   It largely depends on how you are filling the box  as to how you can get the value back out of it   An answer might be right in one circumstance  and wrong in the other

User · Answer

Ensure you have set the name for your ComboBox in your XAML file    lt ComboBox Height  23  Name  comboBox    gt    In your code you can access selected item using SelectedItem property   MessageBox Show comboBox SelectedItem ToString

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Actually you can do it the following way as well   Suppose your ComboBox name is comboBoxA  Then its value can be gotten as   string combo   comboBoxA SelectedValue ToString      I think it s now supported since your question is five years old

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if you want to get the value and validate it you can do something like this  string index   ComboBoxDB Text          if  index Equals                                            MessageBox Show  your message                      else                       openFileDialog1 ShowDialog                string file   openFileDialog1 FileName              reader   new StreamReader File OpenRead file

User · Answer

It s the same principle   You can either use SelectedIndex and use ComboBox Items SelectedIndex  ToString    Or just ComboBox SelectedItem and cast it to any type you need

User · Answer

I had a similar issue and tried a number of solutions suggested in this thread but found that the SelectionChanged Event was firing before the ComboBox item had actually updated to show the new selection  i e  so it always gave the contents of the combobox prior to the change occurring     In order to overcome this  I found that it was better to use the e parameter that is automatically passed to the event handler rather than trying to load the value directly from the combo box   XAML    lt Window Resources gt       lt x Array x Key  Combo  Type  sys String  gt           lt sys String gt Item 1 lt  sys String gt           lt sys String gt Item 2 lt  sys String gt       lt  x Array gt   lt  Window Resources gt   lt Grid gt       lt ComboBox Name  myCombo  ItemsSource   StaticResource Combo   SelectionChanged  ComboBox SelectionChanged    gt       lt TextBlock Name  MyTextBlock  gt  lt  TextBlock gt   lt  Grid gt    C    private void ComboBox SelectionChanged object sender  SelectionChangedEventArgs e        string chosenValue   e AddedItems 0  ToString

User · Answer

private void usuarioBox TextChanged object sender  EventArgs e        string textComboBox   usuarioBox Text

[c#] Get selected value from combo box in C# WPF

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