Problem comparing database values with textbox values

[Sharma Neha]

SqlConnection cn = new SqlConnection();
cn.ConnectionString = "Data Source= ;Database= ;uid= ;pwd= ";
cn.Open();
string sqt = "Select status from tracking where no=@o";
SqlCommand cmr = new SqlCommand(sqt, cn);
cmr.Parameters.AddWithValue("@o", Convert.ToInt32(textBox1.Text));
status = Convert.ToString(cmr.ExecuteScalar());
if (status == "abcd")
    MessageBox.Show("Record updated");
else
     MessageBox.Show("Record not updated");
cn.Close();

I hav one table named tracking with no,status as its feild.the data type of status is varchar.
I want that when status is abcd then it should show the mess. record updated else the other one mess.
But when i m debugging it,even if i m giving the no for which status is abcd,it is showing the else mess.
The main problem is that if condition always evaluates to false even if status in database is abcd.
plzzzz reply soon.thanks for support.

[Curtis Rutland]

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Please read and follow the Posting Guidelines.

MODERATOR

Perhaps the value you are getting from the DB has spaces or something.

[vanc]

SqlConnection cn = new SqlConnection();
cn.ConnectionString = "Data Source= ;Database= ;uid= ;pwd= ";
cn.Open();
string sqt = "Select status from tracking where no=@o";
SqlCommand cmr = new SqlCommand(sqt, cn);
cmr.Parameters.AddWithValue("@o", Convert.ToInt32(textBox1.Text));
status = Convert.ToString(cmr.ExecuteScalar());

Couldn't see any problems but your queries. Try to make some straight queries to check status data to see if there is any problem and try different type of data execution. Like below, I'll use DataReader to get data.

cmd.CommandText = "Select status from tracking where no=" + int.Parse(textBox1.Text);
SqlDataReader reader = cmd.ExecuteQuery(); //recheck for this statement since I can't recall the right command
reader.Read();
status = reader["status"].ToString();
reader.Close();
 

Cheers.

[Sharma Neha]

Couldn't see any problems but your queries. Try to make some straight queries to check status data to see if there is any problem and try different type of data execution. Like below, I'll use DataReader to get data.

cmd.CommandText = "Select status from tracking where no=" + int.Parse(textBox1.Text);
SqlDataReader reader = cmd.ExecuteQuery(); //recheck for this statement since I can't recall the right command
reader.Read();
status = reader["status"].ToString();
reader.Close();
 

Cheers.

This code is not working.plz suggest something else.Error is coming in this code.

[Sharma Neha]

Code tags are a requirement.

Please read and follow the Posting Guidelines.

MODERATOR

Perhaps the value you are getting from the DB has spaces or something.

Thanks for help.
You r talking about spaces in DB,so can u plz tell me what should i do so that my code works.
plz reply soon....

[r035198x]

Thanks for help.
You r talking about spaces in DB,so can u plz tell me what should i do so that my code works.
plz reply soon....

If the DB values contain spaces then you can use the TRIM function to get rid of them.

[Sharma Neha]

If the DB values contain spaces then you can use the TRIM function to get rid of them.

In database there is no problem of space,but the code is not working.Its not the problem of space in database,even Datareader is giving same output as before (executing else part),plzzz help.

[Sharma Neha]

This code is not working.plz suggest something else.Error is coming in this code.

Datareader is same output as before.

[Curtis Rutland]

OK...try this. After you do your select, instead of doing a comparison, show a MessageBox like this:

MessageBox.Show("Status Value: -" + status + "-");

That way, you can see exactly what the value is that your program is getting (I added the "-" so you can see if there are any leading/trailing spaces). This should help you debug the problem further.

[Sharma Neha]

OK...try this. After you do your select, instead of doing a comparison, show a MessageBox like this:

MessageBox.Show("Status Value: -" + status + "-");

That way, you can see exactly what the value is that your program is getting (I added the "-" so you can see if there are any leading/trailing spaces). This should help you debug the problem further.

The only change i made now as compared to before is that i changed the data type of status as text.but it was not working then also.
Then I only added this line(u send me) in my code n kept the type as text.The mess.box is showing status: -abcd-.and then i added the if condition same as before and it started working.But still now i dont know the correct reason why it was not executing before.Thanks a lot for the support.
thank u all for the support n timely response.

[r035198x]

..But still now i dont know the correct reason why it was not executing before....

Perhaps it was just build issue then. (i.e your new code wasn't being automatically picked).
Good luck with the rest of it.