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i have 3 textboxes on windows form:

1 st textbox have static value :100

and in 2nd textbox user type int value

when user enter value in 2nd textbox on change event

i need runtime total of this 2 textbox value in textbox3

iam new in c#.

thanks in advance
Posted 10-Jan-13 23:20pm
Updated 10-Jan-13 23:28pm
v2
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Solution 2

This is how it can be done

private void textBox2_TextChanged(object sender, EventArgs e)
       {
           double val1;
           double val2;
 
           bool validOne = Double.TryParse(textBox1.Text, out val1);
           bool validTwo = Double.TryParse(textBox2.Text, out val2);
 
           if (validOne && validTwo)
           {
               double result = val1 + val2;
               textBox3.Text = result.ToString();
           }
       }

I strongly suggest you get acquainted your self with technology and programming methodology. This is a very basic task and you should have done it yourself.
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Comments
vinayak chavan 11-Jan-13 5:52am
   
no dear its not working total not comes on textbox 3
vinayak chavan 11-Jan-13 5:52am
   
private void textBox5_TextChanged(object sender, EventArgs e)
{
double val1;
double val2;

bool validOne = Double.TryParse(txtTvalidqty.Text, out val1);
bool validTwo = Double.TryParse(textBox5.Text, out val2);

if (validOne && validTwo)
{
double result = val1 + val2;
txtAutoNo.Text = result.ToString();
}
}
Rahul Rajat Singh 11-Jan-13 5:54am
   
are you sure you are entering valid double types as input. Why don't you debug the code to see what is wrong.
vinayak chavan 11-Jan-13 5:53am
   
above i have made the code but not working
vinayak chavan 11-Jan-13 6:03am
   
i need runtime total change in textbox 3 when user chnage value in textbox2
Rahul Rajat Singh 11-Jan-13 6:11am
   
Its working for me, so either you are using wrong textbox ids or some other code is acting up. I really suggest you debug the code and problem will instantly come in front of you.
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Solution 3

Hi friend

double i,j,k; //define these variable on class level.
then take the static textbox value on form load event.

i=convert.todouble(textbox1.text);

then on textbox2 text changed event...

j=convert.todouble(textbox2.text);
k= i+j;
textbox3.text=k.tostring();

but friend for proper output you have to run textbox2 text changed event properly and as per development professional i think you have proper knowledge of text changed event mechanism.

i think its help you.
thanks
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