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C# (Windows Forms Application) Using While loop

Mineten

Hey guys. I started to study C# (Windows Forms Application) in Visual Studio 2010.
This is the Task I need to do but I have no idea how to do it. I have spent hours on this task but I failed at it. I looked on internet for help but I haven't found anything that would help me with the task, so if any of you could help me with this task I would really appreciate it.
It really matters for me a lot because I did 2 star task easily but I want to submit every 3 star task.

2 Replies

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Vulpes12y ago
Accepted answer
Try this:

private void button1_Click(object sender, EventArgs e)
{
int number;
bool isValid = int.TryParse(textBox1.Text, out number);

if (!isValid || number < 0)
{
MessageBox.Show("Please enter a valid positive integer in the textbox");
textBox1.Focus();
return;
}

int sum = 0;
int i = 0;

while (i <= number)
{
sum += i;
i++;
}

MessageBox.Show("Sum is " + sum);
}
Mineten12y ago
It's working. Thank you very much :)