int and String Calculation

Question

1.00/5 (2 votes)

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I have 3 TextBox and 1 Button

First TextBox Value=2
Second TextBox Value=2
Then Click Button i want Answer
Third TextBox Value = 4

AND

First TextBox Value=ab
Second TextBox Value=cd
Then Click Button i want Answer
Third TextBox Value = abcd

How to Solve its, Please Help Me

Posted 29-Oct-13 23:04pm

rkganapathy

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Comments

thatraja 30-Oct-13 5:11am

What have you tried?

BillWoodruff 30-Oct-13 5:21am

Having TextBoxes serve both as sources of numeric values and strings is generally a poor design choice. Consider using NumericUpDown Counters for your numeric inputs, or a MaskedTextBox.

2 solutions

Solution 2

Try parsing the content into integers, if that works add otherwise concatenate.

C#

private void button_Click(object sender, EventArgs e)
{
    int a;
    int b;

    if (Int32.TryParse(textBox1.Text, out a) && Int32.TryParse(textBox2.Text, out b))
        textBox3.Text = Convert.ToString(a + b);
    else
        textBox3.Text = textBox1.Text + textBox2.Text;
}

Hope this helps,
Fredrik

Posted 29-Oct-13 23:20pm

Fredrik Bornander

Comments

Thanks7872 30-Oct-13 5:38am

+5

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seyed mahmud shahrokni · Accepted Answer · 2013-10-29T23:14:00

C#

string val1 = "", val2 = "", val3 = "";
try
{
    // as a digits
    val1 = text1.Value;
    val2 = text2.Value;
    val3 = (Convert.ToInt32(val1) + Convert.ToInt32(val2)).ToString();
    txt3.Value = val3;
}
catch (Exception ex)
{
    // as a string
    val1 = text1.Value;
    val2 = text2.Value;
    val3 = val1 + val2;
    txt3.Value = val3;

}