Question

I have 8 textboxes that only accept integers. How to calculate the total of value entered by users in each textbox and the result will be showed as a label. After user click on submit button, the the value of the label(result of numbers) will be stored in db. Anyone knows? Thank you. Looking forward to hear from u guys.
I got this error : Input string was not in a correct format.
At this line:

int total = 0;
total = int.Parse(TextBox2.Text) + int.Parse(TextBox4.Text) + int.Parse(TextBox6.Text) + int.Parse(TextBox8.Text) + int.Parse(TextBox10.Text) + int.Parse(TextBox12.Text) + int.Parse(TextBox14.Text) + int.Parse(TextBox16.Text);    
Label1.Text = total.ToString(); 

Answer 1

You can do this way:-

totalValue = int.Parse(txtBox1.Text) + int.Parse(txtBox2.Text) + int.Parse(txtBox3.Text) + int.Parse(txtBox4.Text) + int.Parse(txtBox5.Text) + int.Parse(txtBox6.Text) + int.Parse(txtBox7.Text) + int.Parse(txtBox8.Text);

Store the value in label

label.Text = totalValue;

OR

foreach (Control c in this.Controls)
{
if (c.GetType().Name.ToString()==”TextBox”)
{
totalValue += int.Parse(String.Format(“txtBox{0}.Text”, count));
}
}

foreach (Control c in this.Controls)
{               
        if (c.GetType().Name.ToString()=="TextBox")
       {
                int value = 0;
                if(int.TryParse(((TextBox)c).Text,out value))
                     totalValue += value;
       }
}

Store the value in label

label.Text = totalValue;