Need to remove already selected value in wpf datagrid combo box

Question

Hi,

From the MVVM WPF application, We have WPF datagrid and one of the column is combo box. If user selected value in the combobox on first row should not be visible on the combobox in the next row. Please help.

Thanks

Answer 1

Hi @K, Arivalagan ,

You could use a separate data source for it.

A simpler example:

List<string> list1 = new List<string>();  
List<string> list2 = new List<string>();  
  
public void ListView()  
{  
	InitializeComponent();  
  
	list1.Add("a");  
	list1.Add("b");  
	list1.Add("c");  
  
	this.ComboBox1.ItemsSource = list1;  
	this.ComboBox2.ItemsSource = list1;  
}  

Handle it like this：

private void ComboBox1_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)  
		{  
			ComboBox2.SelectedIndex = -1;  
			string tmp = ComboBox1.SelectedValue as string;//Save the selection of combobox1  
			list2.Clear();  
			list2.AddRange(list1);  
			list2.Remove(tmp);  
			ComboBox2.ItemsSource = null;  
			ComboBox2.ItemsSource = list2;  
		}  

Output：

Best Regards,
Jiale

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