How can do That to TextBox3

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1.00/5 (1 vote)

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I Create 3 Text Boxs

1:Textbox 1 =15.0;

2:Textbox 2 = .10;

3:Textbox 3 = 15.0 * .10 like (Textbox 1 * Textbox 2)

How can do That to TextBox3

Posted 9-Apr-15 1:21am

Member 11280947

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Comments

Magesh M N 9-Apr-15 7:29am

what you have tried? What's the difficulty in this?.

krish2013 9-Apr-15 7:33am

int i=Textbox.text;
int j=Textbox.text;
when textbox3 click event write a method for multipy the values

Magesh M N 9-Apr-15 7:38am

Text property of TextBox is string you cannot directly convert it to int

krish2013 9-Apr-15 7:43am

use convert.Toint32(Textbox1.Text) like that u can store text box values into variables

CHill60 9-Apr-15 7:49am

Parse is better than Convert, TryParse is better again.

2 solutions

Solution 2

Try this:

C#

decimal x, y;

bool isXValid = decimal.TryParse(Textbox1.Text, out x);

bool isYValid = decimal.TryParse(Textbox2.Text, out y);

if (isXValid && isYValid)
    Textbox3.Text = (x * y).ToString();
else
    Textbox3.Text = "Invalid input";

Learn more:
1. http://csharp.net-informations.com/gui/cs-textbox.htm[^]
2. https://msdn.microsoft.com/en-us/library/9zbda557%28v=vs.110%29.aspx[^]

Posted 9-Apr-15 1:49am

Peter Leow

Updated 9-Apr-15 1:53am

v2

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CHill60 · Accepted Answer · 2015-04-09T01:47:00

Quote:
when textbox3 click event write a method for multipy the values

1. Double-click on TextBox3 to get to the Click event handler code.
2. In that event capture the information in the other two textboxes - your code in your comment is close but you need to use something like double.TryParse[^] (NB the link is for int.TryParse but the principles are the same for all datatypes that support the TryParse method)
3. Do your calculation
4. Put the results into TextBox3 - hint you will need the ToString() method, and you might want to format the string[^]

Other hints:
- do you really want to use int? (as per your comment). Your sample data does not use integers. You might need to limit the size of the numbers entered. Or choose another data type.