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How to implement guide with data binding in winforms: changes not reflecting in textbox

👀 Views: 0 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-14
winforms databinding inotifypropertychanged csharp

I'm trying to configure I'm confused about I'm stuck on something that should probably be simple..... I'm relatively new to this, so bear with me. I'm experiencing a frustrating scenario with data binding in my WinForms application. I have a `TextBox` that is supposed to display a property from my data model, but after making changes to the underlying data, the `TextBox` does not update automatically. I'm using .NET Framework 4.7.2 and the `INotifyPropertyChanged` interface for property change notifications. Here's a simplified version of my model class: ```csharp public class User : INotifyPropertyChanged { private string _name; public string Name { get => _name; set { if (_name != value) { _name = value; OnPropertyChanged(nameof(Name)); } } } public event PropertyChangedEventHandler PropertyChanged; protected virtual void OnPropertyChanged(string propertyName) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } } ``` In my form, I have a `TextBox` that is bound to the `Name` property of a `User` instance: ```csharp public partial class MainForm : Form { private User _currentUser; public MainForm() { InitializeComponent(); _currentUser = new User(); textBoxName.DataBindings.Add("Text", _currentUser, "Name", true, DataSourceUpdateMode.OnPropertyChanged); } private void UpdateUserName(string newName) { _currentUser.Name = newName; } } ``` I am calling `UpdateUserName` from a button click event handler, which modifies the `Name` property. However, when I change the name, the `TextBox` does not update to reflect the change until I manually trigger a UI refresh. I've verified that the `PropertyChanged` event is being fired, but the UI doesn't seem to be listening. The debugger shows that the property setter is called, and the event is triggered, yet the `TextBox` remains unchanged. I've tried re-adding the data binding after updating the name, but that leads to additional complications and doesn't solve the question. Is there something obvious that I'm missing in my setup? Any insights or similar experiences would be greatly appreciated. Thanks in advance! Has anyone else encountered this? This is my first time working with Csharp 3.9. What's the best practice here? I recently upgraded to Csharp 3.11. Thanks for any help you can provide!