WPF Iteration

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Hello,

Using .net 4 & VS C# Express 2010, new to both and I'm working through some basic programming tasks.

I'm trying to have a while loop count disaplyed in my WFP textbox which is easy enough to do in a wpf console.

Here's my code and xaml:

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfWhileLoop
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            int n = 1;

            while (n < 6)
            {
                textBox1.Text = "current value of n is " + n++;
            }
        }
    }
}

XML

<Window x:Class="WpfWhileLoop.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<TextBox Height="311" HorizontalAlignment="Left" Name="textBox1" VerticalAlignment="Top" Width="503" AcceptsReturn="True" />
</Grid>
</Window>

When I run this I get:

current value of n is 5

I 'm trying to have each increment displayed, e.g.:

current value of n is 1
current value of n is 2
current value of n is 3
current value of n is 4
current value of n is 5

Any ideas how i can make this work?

Thanks!

Posted 2-Jan-11 12:31pm

shawnbot

Updated 2-Jan-11 12:45pm

Tony Richards

v2

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Tony Richards 2-Jan-11 18:47pm

Edited to fix code snippets. In future, please wrap the code snippets in pre tags, but not the rest of the text (as I have done here). It makes it clearer, preserves indentation, and a clearer question is more likely to get a reply.

2 solutions

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Tony Richards · Answer 1 · 2011-01-02T12:54:00

The simplest way to do it is probably as follows:

C#

textBox1.Text += "current value of n is " + (n++) + Environment.NewLine;

This appends the string to new value to the current value of the Text property.

I'm assuming this is a simplified example. If you're actual requirement is more complex, you may want to look at binding the list of values to something like a ListBox and using data templates to format it appropriately. This would be a more normal 'WPF' way of doing things.

You may want to consider looking through a C# for beginners book. This is a fairly basic string manipulation task, and you may benefit from working through the basics.

Valery Possoz · Answer 2 · 2011-01-02T12:59:00

Solution 2

Hi,

You just need to add a new line in each iteration.

C#

while (n < 6)
{
    textBox1.Text = textBox1.Text + "current value of n is " + n++ + Environment.NewLine;
}

Valery.

Posted 2-Jan-11 12:59pm

Valery Possoz