cannot implicitly convert type 'int' to 'string' in C#

Question

I want to make a programs to sum 2 number in 2 text box but it's just not working. I don't know exactly why. (And sorry for my bad english skill XD).

Here's the code :

textBox3.Text = Convert.ToInt32(textBox1.Text) + Convert.ToInt32(textBox2.Text);

What is the value of textBox1.Text and textBox2.Text? What do you mean by not working? Any exception or error message? — Soner Gönül
– Soner Gönül, Commented Mar 24, 2014 at 13:08
The error should be obvious: the sum is not a String, but an Int32. — crashmstr
– crashmstr, Commented Mar 24, 2014 at 13:10
@helb but you can't assign the resulting sum of those two int to a String. — crashmstr
– crashmstr, Commented Mar 24, 2014 at 13:12

Stephan · Accepted Answer · 2014-03-24 13:15:15Z

2

Since the result of the operation is not a string but an int you have to call ToString() to assign the string value to textBox3.Text

textBox3.Text = (Convert.ToInt32(textBox1.Text) + Convert.ToInt32(textBox2.Text)).ToString();

Working code:

string y = "";
y = (Convert.ToInt32("3") + Convert.ToInt32("4")).ToString();

answered Mar 24, 2014 at 13:08

Stephan

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Comments

Vlad · Accepted Answer · 2014-03-24 13:12:55Z

0

Convert Int32 value to string for display.

textBox3.Text = Convert.ToString(Convert.ToInt32(textBox1.Text) + Convert.ToInt32(textBox2.Text));

answered Mar 24, 2014 at 13:12

Vlad

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