How to calculate Tex box Values

Question

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Hello All,

I want to calculate two text box values in 3rd text box like below...

MRP : 10000 (USER WILL ENTER THIS VALUE)
LESS: 10% (THIS WILL BE DROP DOWN MENU WHERE USER CAN SELECT THE %)
20%
30%
40%
45%
50%

PRICE: 9000 (IN THIS TEXT BOX PRICE AUTOMATIC CALCULATE ON ABOVE SELECTED % )
8000
7000
6000
5500
5000

for eg: IF I HAVE SELECTED 20% THAN IN PRICE TEXT BOX 8000 SHOULD BE DISPLAYED.
IF I HAVE SELECTED 30% THAN IN PRICE TEXT BOX 7000 SHOULD BE DISPLAYED.

Please ant one give me idea how to code this?????

Posted 19-Aug-12 22:26pm

ns_27

Add a Solution

3 solutions

Solution 1

On Drop down selected index changed event

C#

textBox1.Text = (int.Parse(textBox1.Text)-((int.Parse(textBox1.Text) * Convert.ToInt32(comboBox1.SelectedValue)) / 100)).ToString();

Posted 19-Aug-12 22:48pm

Renju Vinod

Comments

ns_27 20-Aug-12 5:02am

No calculation has done...
i want like below..
text box1 - 10% = text box2

ns_27 20-Aug-12 5:03am

Thanks for help but its not working??
plz help me.

Renju Vinod 20-Aug-12 5:07am

Please send the error which you got

ns_27 20-Aug-12 5:12am

Nothing is happing no calculation..
I have i text box in which i enter 10000
then i selected % from combo box1 10
i want ans 9000 in my text box2

Renju Vinod 20-Aug-12 6:07am

Its works fine for me.Please check it using one break point

Solution 2

On the dropdown changed event,

C#

TextBox2.Text=(int.Parse(textBox1.Text.ToString())-(int.Parse(textBox1.Text.ToString())*((int.Parse(comboBox1.SelectedValue.ToString()))/100)).ToString();

Posted 19-Aug-12 23:39pm

Santhosh Kumar Jayaraman

Updated 20-Aug-12 1:50am

v3

Comments

ns_27 20-Aug-12 7:35am

Showing below two errors:

Error 1: The best overloaded method match for 'int.Parse(string)' has some invalid arguments
Error 2: Argument '1': cannot convert from 'object' to 'string'

Santhosh Kumar Jayaraman 20-Aug-12 7:51am

Just add ToString() next to textbox.Text and combobox.SelectedValue.

Check the updated solution

ns_27 23-Aug-12 8:16am

I wrote this code...
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
txtmop.Text.ToString()=(int.Parse(txtdp.Text.ToString()))-(int.Parse(txtdp.Text.ToString())*((int.Parse(comboBox1.SelectedValue.ToString()))/100)).ToString();
}

Error 1 Operator '-' cannot be applied to operands of type 'int'

This error i am getting.. plz help me to resolve it. Thanks !!

Santhosh Kumar Jayaraman 23-Aug-12 9:43am

On the left hand side, dont use ToString().
txtmop.Text=

ns_27 24-Aug-12 2:15am

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
txtmop.Text=(int.Parse(txtdp.Text.ToString()))-(int.Parse(txtdp.Text.ToString())*((int.Parse(comboBox1.SelectedValue.ToString()))/100)).ToString();
}

Still getting same error !!!

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Ank_ush · Accepted Answer · 2012-08-20T06:38:00

Try This:-

Create variable in your form. I wrote double because price may in point for eg. 27.50

C#

double a, b,c;

then I dropped 1 combobox, and 2 textbox controls.
then write following code:-
1. First in Combo box selected Index event:-

C#

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    if (comboBox1.SelectedValue != "")
    {
        if (textBox1.Text != "")
        {
            a = Convert.ToDouble(textBox1.Text);
            b = Convert.ToDouble(comboBox1.SelectedItem.ToString());
            c = (a * b) / 100;
            textBox3.Text = (a - c).ToString();
        }
    }
}

2. Then in textbox changedvalue event of textbox 1:-

C#

private void textBox1_TextChanged(object sender, EventArgs e)
{
    if (textBox1.Text != "")
    {
        a = Convert.ToDouble(textBox1.Text);
        b = Convert.ToDouble(comboBox1.SelectedItem.ToString());
        c = (a * b) / 100;
        textBox3.Text = (a - c).ToString();
    }
}

I wrote the same code in Combobox selected index changed event because if the user changes the discount % then the price should be calculated again.

Any query plz reply or comment.
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How to calculate Tex box Values

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Solution 1

Solution 2

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How to calculate Tex box Values

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Solution 3

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