calculate null value in sql query

Question

0.00/5 (No votes)

See more:

SQL-Server-2005

C#

cmd = new OleDbCommand("select sum(Net_Total) FROM Factory_Pay where Factory_Name='" + comboBox1.Text + "'", con);
                    dr = cmd.ExecuteReader();
                    while (dr.Read())
                    {
                        if (dr.HasRows)
                        {
                            double dd = Convert.ToDouble(dr[0].ToString());
                            label1.Text = "Grand Total  :  " + dd.ToString("0,0.00", CultureInfo.CreateSpecificCulture("Hi-In"));
                        }
                        else
                        {
                            MessageBox.Show("No Record found", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                        }
                    }
                    dr.Close();

i m using this code to calculate total amount but i got some error msg because factory name column available in table but Net_Total column contain null value....

error msg is : "Input string was not in correct formate ";

so any one help me..

Posted 22-Sep-12 1:38am

Shambhoo kumar

Add a Solution

Comments

Shambhoo kumar 24-Sep-12 0:50am

any one help me..?

2 solutions

Solution 1

select isnull(sum(isnull(Net_Total,0)),0) FROM Factory_Pay where Factory_Name='

Posted 22-Sep-12 1:42am

md_refay

Comments

Shambhoo kumar 22-Sep-12 7:46am

i got this msg "wrong number of arguments used with function in query expression 'isnull(sum(isnull(Net_Total,0)),0)'".

Shambhoo kumar 22-Sep-12 7:49am

r u there...?

[no name] 22-Sep-12 8:19am

send Me The Cmd.Text To CHeck The Error Exctaly

Shambhoo kumar 24-Sep-12 0:45am

cmd = new OleDbCommand("select isnull(sum(isnull(Net_Total,0)),0) FROM Factory_Pay where Factory_Name='" + comboBox1.Text + "'", con);

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

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

_Amy · Accepted Answer · 2012-09-23T20:27:00

Try this:

C#

cmd = new OleDbCommand("select sum(Net_Total) FROM Factory_Pay where Factory_Name='" + comboBox1.Text + "'", con);
dr = cmd.ExecuteReader();
while (dr.Read())
{
    if (dr.HasRows)
    {
        //Here from database some values are coming null. You need to check for null values also
        if(dr[0] != DBNull.Value){
            double dd = Convert.ToDouble(dr[0].ToString());
            label1.Text = "Grand Total  :  " + dd.ToString("0,0.00", CultureInfo.CreateSpecificCulture("Hi-In"));
        }
    }
    else
    {
        MessageBox.Show("No Record found", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
}
dr.Close();

--Amit