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Subject:
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textboxes and additions
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Posted By:
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toiletgraffiti
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Post Date:
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1/20/2006 9:56:33 AM
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Hi
Im having difficulty figuring out how to sum the values a user enters into 5 textboxes. I want a total to appear in a 'total' textbox. Its a windows application in c#.
My code so far is:
txtTotal.Text = (txtShare1.Text+txtShare2.Text+txtShare3.Text+txtShare4.Text+txtShare5.Text);
All this does is concatenate the vlaues rather than summing them...Im sure this is very simple I just cant figure out the syntax!
Any help greatly appreciated.
tg.
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Reply By:
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toiletgraffiti
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Reply Date:
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1/20/2006 10:13:48 AM
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ok..I did this:
int theSum = Int32.Parse(txtShare1.Text) + Int32.Parse(txtShare2.Text) + Int32.Parse(txtShare3.Text) + Int32.Parse(txtShare4.Text) + Int32.Parse(txtShare5.Text);
txtTotal.Text = theSum.ToString();
which *should* work okay? however Im now getting the following: Input string was not in a correct format.
any ideas?
tg.
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Reply By:
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arielote
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Reply Date:
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1/21/2006 5:09:07 PM
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I've got same problem comparing strings with <= .
In old "C" you've got "atoi" or "atof" functions, but I do not know waht happend in this new version.
However in VB normally string got property ste.Value wich returns numeric value.
Do somebody know an aeticle about types convertions, o related functions?
Regards
Arielote
---
Ariel Folonier
San Nicolas
Argentina
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Reply By:
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sarbjitmultani
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Reply Date:
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1/23/2006 1:45:15 AM
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Dear toiletgraffiti ,
Kindly check the following code for your problem.
textBox5.Text=Convert.ToString(Convert.ToInt32(textBox1.Text.ToString())+ Convert.ToInt32(textBox2.Text.ToString())+Convert.ToInt32(textBox3.Text.ToString())+Convert.ToInt32(textBox4.Text.ToString()));
Just change the textbox name whatever you have given in your application.
take care
Best regards,
sarbjit
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Reply By:
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planoie
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Reply Date:
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1/23/2006 10:50:32 AM
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Is it possible you are experiencing a problem because the code is encountering an empty textbox? "" is probably causing the "invalid format" exception because an empty string is not numeric. Try creating a helper function that accepts the textbox as an argument and checks for an empty .Text property, returns 0 for that or returns the property value converted to an integer. Then just call the function for all textboxes you are going to add together.
-Peter
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