Difference between textbox text added by binding and added by code in windows form C#

Question

I have a TextBox with a data binding, which I later update the text on via the combobox_selectedindexchanged() event of ComboBox.

My problem is that the data gets changed on this combobox_selectedindexchanged() event but when i click on the TextBox data gets disappeared.

Answer 1

If I understand your question, you are updating the TextBox.Text property on a bound TextBox.

Don't do this !

If you need to update the text in that TextBox, update the underlying DataSource

Cheers

Answer 2

I created a project do whatever as you mentioned above. The TextBox's Text changed into "Foo" after comboBox_SelectedIndexChanged event, then when I click on the TextBox, it is still there. Here's my code.

private Foo _foo;
public Form1()
{
    InitializeComponent();
    _foo = new Foo();
    txtName.DataBindings.Add("Text", _foo, "Name");
}

private void comboBox_SelectedIndexChanged(object sender, EventArgs e)
{
    txtName.Text = "Foo";
}

Does you change the TextBox's Text elsewhere? Maybe you should post your code here, so we can see what the matter is.