Question

The following code can only display the last number:

    for (i=0; i<3; i++)
       textbox.text({0},i);

But I want to output numbers in textbox like this;

    0
    1
    2

How can I do with it? thx.

Answer 1

Create a StringBuilder, like this more or less (pseudocode):

StringBuilder sb = new StringBuilder();
for (i=0; i<3; i++)
     sb.AppendLine(string.Format({0},i));

textbox.Text = sb.ToString();

Just note: if you are using WPF avoid direct access to the control properties and operate on ViewModel instead, if not, you loose notable part of the benefits brought to you with that technology.