WPF C# adding event handler programmatically

问题

In my code I create an array of TextBoxes :

namespace TCalc
{
    public partial class MainWindow : Window
    {
        public TextBox[] pubAltArray;

        public MainWindow()
        {
            InitializeComponent();

            pubAltArray = new TextBox[10];

Then I create the TextBoxes programmatically using the following code :

private void generatePublishedTxtBox()
{
    for (int i = 0; i < 10; i++)
    {
        TextBox pubAlt = new TextBox();
        grid_profile.Children.Add(pubAlt);
        pubAlt.SetValue(Grid.RowProperty, 1);
        ...
        pubAltArray[i] = pubAlt;
    }
}

Than I have some routine I want to run when the content of each TextBox changes :

private void doTheStuff(object sender, TextChangedEventArgs e)
{
...
}

So I tried to add event handler during the definition of new TextBox however without success :

pubAlt.TextChanged += new System.EventHandler(doTheStuff());

pubAlt.TextChanged += RoutedEventHandler(calculateCorAlts());

Any hint for me?

回答1:

Try:

pubAlt.TextChanged += new TextChangedEventHandler(doTheStuff);

or:

pubAlt.TextChanged += doTheStuff;

Both lines do the same thing. The second one is just shorthand for the first line since it makes code easier to read.

回答2:

You are invoking the method using (). Change your code to be like this:

pubAlt.TextChanged += new System.EventHandler((s,e) => doTheStuff());
pubAlt.TextChanged += RoutedEventHandler((s,e) =>calculateCorAlts());

Your method are not matching what it was asking for.

来源：https://stackoverflow.com/questions/33004333/wpf-c-sharp-adding-event-handler-programmatically

标签

wpf

events

textbox

handler