How to calculate the sum of more than one entered into a single textbox

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Hi!

I have dropdownlist control that contain subjects in asp.net C# . The user selects the subject say maths, from the dropdownlist and then enter the mark for the subject in the textbox. Click on submit button to store the data in the database, i want to return the total of the entered marks say, i entered 3 different marks how do i get the total.

i tried

C#

double total = Convert.ToDouble(TextBox95.Text);
        
           total = Convert.ToInt32(TextBox93.Text) + Convert.ToInt32(TextBox93.Text)----

but the displayed total in db is the entered number multiplied by the number of (Convert.ToInt32(TextBox93.Text))in the formula. it makes sense mathematically but how do i make the entered values appear differently while stored in the same textbox?

thank you

Posted 25-Jun-13 11:33am

dihawa

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[no name] 25-Jun-13 17:57pm

Not that you are going to bother but "how do i make the entered values appear differently while stored in the same textbox", what does that even mean?

MuhammadUSman1 26-Jun-13 0:04am

Couldn't understand what exactly you want to do?

BulletVictim 26-Jun-13 1:31am

You are looking for something more like this?
total = double.Parse(textBox1.Text) + double.Parse(textBox2.Text);

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Sadique KT · Answer 1 · 2013-06-25T19:33:00

Solution 1

use the following line to get sum of all subjects...In your click event ..

total=total+Convert.ToInt32(TextBox93.Text);

Else store each subject and its mark to a collection so that you can reuse it in other methods also...
Dictionary<string,> dicSubject=new Dictionary< string,long>();
dicSubject.Add("Maths",40);

Then
Iterate through the collection to get sum of the marks.

Posted 25-Jun-13 19:33pm

Sadique KT

Updated 25-Jun-13 20:13pm

v3

Comments

BulletVictim 26-Jun-13 1:55am

Sadique that method works better when the total is calculated within a loop.
Now not saying its wrong. Depending on how he intends to write the total to the database