Add different values to one textbox

Question

I'm trying to add multiple values and total them in one textbox from different button clicks. For example I have textBox1 and 5 labels + 5 buttons. I want to be able to click button one and it adds the value from label1 to textBox1 then if I click button2 it will add the value from label2 to textBox1.

I can get it to work once but when I try to add more totals to textbox1 from different buttons it clears the total? what the best way of doing this function?

Vulpes · Answer

The code to do that would be something like this: // button1 click decimal d; if (!decimal.TryParse (textBox1.Text out d)) { MessageBox.Show(The number in textbox1 is invalid. Please amend.); textBox1.Focus(); return; } d += decimal.Parse(label1.Text); textBox1.Text = d.ToString(); // button2 click decimal d; if (!decimal.TryParse (textBox1.Text out d)) { MessageBox.Show(The number in textbox1 is invalid. Please amend.); textBox1.Focus(); return; } d += decimal.Parse(label2.Text); textBox1.Text = d.ToString(); and so on changing just the highlighted line for the other 3 buttons

Vulpes · Answer

Incidentally Mike it's also possible to do all this using a single button_Click handler rather than 5 different ones: Button b = (Button)sender; string number = b.Name.Substring(6); decimal d; if (!decimal.TryParse (textBox1.Text out d)) { MessageBox.Show(The number in textbox1 is invalid. Please amend.); textBox1.Focus(); return; } Label lbl = (Label)this.Controls[label + number]; // if labels are all on form d += decimal.Parse(lbl.Text); textBox1.Text = d.ToString()

mike Delvotti · Answer

Thank you Vulpes I got it working using the below in each button click but just changing the labels: double result = Double.Parse(textBox1.Text) + Double.Parse(label1.Text); textBox1.Text = result.ToString(F2); But your answer looks much better as my above version doesn't allow for input errors.