WinForms: Unable to Persist ComboBox Selected Value After Rebinding Data Source Dynamically
I've searched everywhere and can't find a clear answer. I've tried everything I can think of but Hey everyone, I'm running into an issue that's driving me crazy... I tried several approaches but none seem to work... I'm experiencing an issue in my WinForms application where the selected value of a ComboBox is lost after I dynamically rebind its data source. I'm using .NET Framework 4.8 and populating the ComboBox with data from a SQL Server database using Entity Framework. After the ComboBox is initially populated and a user selects a value, I need to refresh the list based on a different selection from another control, but the selected value doesn't persist after the rebind. Here’s a simplified version of what my code looks like: ```csharp private void UpdateComboBoxData() { var selectedValue = comboBox1.SelectedValue; var newData = dbContext.Products.Where(p => p.CategoryId == selectedCategoryId).ToList(); comboBox1.DataSource = newData; comboBox1.DisplayMember = "ProductName"; comboBox1.ValueMember = "ProductId"; if (newData.Any()) { comboBox1.SelectedValue = selectedValue; } else { comboBox1.SelectedValue = null; // Clear the selection if no data } } ``` The ComboBox is populated initially when the form loads, but when I call `UpdateComboBoxData()` from another event handler, the selected value is not being set correctly and remains null or defaults to the first item in the list. I also tried saving the `SelectedValue` before the rebind and restoring it afterward, but it still doesn’t work. I've verified that `selectedValue` contains the correct ID before I set it back, yet nothing appears to take effect. I've confirmed that the bindings are indeed getting updated by inspecting the `comboBox1.DataSource`. Is there a recommended best practice for maintaining the selected item in a ComboBox after rebinding its data source? Or is there an alternative approach to achieve this? Any help would be appreciated! For context: I'm using C# on Ubuntu. How would you solve this? I'm working on a API that needs to handle this. For reference, this is a production service. What would be the recommended way to handle this?