multiply two values from textbox in asp.net

Question

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SQL-Server-2005

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HI..

How to multiply two values from textbox and put the result in another textbox in c#...

Here is my code but it getting error, Cannot implicitly convert type 'int' to 'strint'.......

C#

protected void txtqty_TextChanged(object sender, EventArgs e)
   {
       if (txtrate.Text != "")
       {
           txttamt.Text = ((Convert.ToInt32(txtrate.Text.Trim())) * (Convert.ToInt32(txtqty.Text.Trim())));
       }
   }

In SQL i stored the values datatype as integer.......

Posted 6-Jul-11 20:21pm

nithibs

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5 solutions

Solution 3

Hi,
Pls change as
txttamt.Text = ((Convert.ToInt32(txtrate.Text.Trim())) * (Convert.ToInt32(txtqty.Text.Trim()))).ToString();

Posted 6-Jul-11 20:30pm

srs84

Solution 2

use below code:-

protected void txtqty_TextChanged(object sender, EventArgs e)
   {
       if (txtrate.Text != "")
       {
           txttamt.Text =Convert.tostring( ((Convert.ToInt32(txtrate.Text.Trim())) * (Convert.ToInt32(txtqty.Text.Trim()))));
       }
   }

Posted 6-Jul-11 20:27pm

AishwaryS

Updated 6-Jul-11 20:29pm

v2

Comments

[no name] 14-Jul-11 6:31am

With your code, he'll get the same error.

Solution 5

Try this one :

C#

protected void txtqty_TextChanged(object sender, EventArgs e)
   {
       if (txtrate.Text != "")
       {
           txttamt.Text = (((Convert.ToInt32(txtrate.Text.Trim())) * (Convert.ToInt32(txtqty.Text.Trim())))).tostring();
       }
   }

What i did here is that i added a bracket at the beginning and another one at the end then converted the whole statement to string.So your error is that you are placing integers in txttamt which accepts strings.

Posted 6-Jul-11 20:30pm

mhamad zarif

Comments

[no name] 14-Jul-11 6:31am

I believe you are aware of the fact that C# is a case-sensitive language. It's not tostring(), it is ToString().

Solution 6

You could consider this,

C#

txttamt.Text = (ConvertIntoInt32(txtrate.Text) * ConvertIntoInt32(txtqty.Text)).ToString();

public Int32 ConvertIntoInt32(string dataToConvert)
{
    Int32 result = default(Int32);
    return Int32.TryParse(dataToConvert.Trim(), out result) ? result : result;
}

:)

Posted 15-Jul-11 18:46pm

Mohammad A Rahman

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Syed Salman Raza Zaidi · Accepted Answer · 2011-07-06T20:27:00

Solution 1

Hi,

Try this

int a= Convert.toInt32(txtrate.Text);
int b=Convert.toInt32(txtqty.Text);

int c=a*b;
txtamt.Text= c;//or Convert.toString(c);

Also you can try without Trim(),it will surely work

Posted 6-Jul-11 20:27pm

Syed Salman Raza Zaidi

Comments

rajeshpappachan 25-Jun-12 3:01am

Cannot implicitly convert type 'int' to 'string'