Display data in 3 text boxes at the same time?

Alan Conlon

Is it possible to enter a number into a textbox and have two more textboxes automatically complete with different calculations. Textbox 1 will be an entered number, textbox 2 will be a percentage value and textbox 3 will be a decimal value.

4 Replies

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Vulpes13y ago
Accepted answer
It sounds like your TextChanged handler needs to be coded on the following lines:

private void textBox1_TextChanged(object sender, EventArgs e)
{
int num1;
if (!int.TryParse(textBox1.Text, out num1)) return; // not an integer, don't do anything
int num2 = 0, num3 = 0;
if (num1 < 5)
{
// calculate num2 & num3
}
else if (num1 < 25)
{
// calculate num2 & num3
}
else
{
// calculate num2 & num3
}
textBox2.Text = num2.ToString();
textBox3.Text = num3.ToString();
}
Alan Conlon13y ago
Just brilliant thank you, worked out great. Would have been a bit stuck on the if statement actually in the end too.
Alan Conlon13y ago
Yeah the TextChanged event is what I had in mind. Just a bit stuck on the calculations, I am going to need an if statement which is ok but not sure how to relate it back to textBox2 and textBox3. What I need is three number calculations from textBox1 <5, <25, >25. Each of these options will calculate the number by a particular amount for textBox2 and the same for textBox3. Think I can figure out the if statement but not sure what to do with the results??
Vulpes13y ago
Yes, just handle textbox1's Leave event and put the calculations for textbox2 and textbox3 in the event handler for that.

You can also do it dynamically (as the user types the value into textbox1) by handling it's TextChanged event rather than its Leave event.