CODEWITHSUNDEEP
wpfdatagridcombobox
Travis Banger
Travis Banger

Reputation: 717

WPF DataGrid: How to determine the index of the row in which a ComboBox selection changed?

I have been using this code, in order to determine the current row being edited interactively:

private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    MyModel myModel = (MyModel) dataGrid.CurrentItem;
    int rowIndex = dataGrid.Items.IndexOf(myModel);
    [...]
}

The limitation of this approach is that the event handler is also executed when the ComboBox selection changes programmatically. In that case, CurrentItem is null and thus I don't know the row index.

TIA

Note: I do not really need the row index per se, I could use the Model (CurrentItem) as well.

Edited after I solved the problem: Notice how the code above ignores the arguments (which tend to contain really important stuff!!)

Upvotes: 0

Views: 1602

Answers (2)

Travis Banger
Travis Banger

Reputation: 717

This is what I was looking for...

private void ComboBoxRight_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    ComboBox comboBox    = (ComboBox) sender;
    DataGridRow row      = (DataGridRow) dataGrid.ContainerFromElement(comboBox);
    int rowIndex         = row.GetIndex();
    MyModel gridModel    = (MyModel) dataGrid.Items[rowIndex];
}

-Travis

Upvotes: 4

Kumareshan
Kumareshan

Reputation: 1341

You can use dateGrid.Selected index to find whether value is set from UI or code behind 

private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
   if(dataGrid.Selected>=0)
   {
     MyModel myModel = (MyModel) dataGrid.CurrentItem;
     int rowIndex = dataGrid.Items.IndexOf(myModel);
      [...]
     dataGrid.Selected=-1;
   }

}

In the above case even thought comobox selection changed called when the value is changed from code behind, dataGrid selected index will be -1. But when the user changes it from the Ui you'll get the selected index of particular row and again it'll set to -1.

Upvotes: 0

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