how to read a value from database from datareader in asp.net c#

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Please someone tell that how to solve this error my code is:

C#

while (dr.Read())
{
      adcode = dr[0];
}
dr.Close();

it is throwing object to int error, please someone tell.

Posted 22-Apr-11 23:36pm

chander_rani

Updated 23-Apr-11 3:29am

Sandeep Mewara

v2

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Pratik Bhesaniya · Answer 1 · 2011-04-22T23:44:00

Solution 1

Refer below link,

[^]

I think your adcode field is int so try this,

XML

while (dr.Read())
                              {
                                    adcode = (int)dr[0];
                              }
                              dr.Close();

If it is String then,
adcode = (string)dr[0];

Posted 22-Apr-11 23:44pm

Pratik Bhesaniya

Updated 22-Apr-11 23:50pm

v3

r a m e s h · Answer 2 · 2011-04-22T23:48:00

Solution 2

Hi,

As dr[0] returns a value of object type, it throws error. You need to convert it into integer. Try the following code.

adcode  = Convert.ToInt32(dr[0]);

or

int ord = dr.GetOrdinal("FieldName");
adcode = dr.GetSqlInt32(ord).Value;

Posted 22-Apr-11 23:48pm

r a m e s h

Prasanta_Prince · Answer 3 · 2011-04-23T03:04:00

Solution 3

scmd=new SqlCommand("select * from AdminUser",scon);
            scon.Open();

        sdr = scmd.ExecuteReader(CommandBehavior.KeyInfo);
        sdr.Read();
        dt = sdr.GetSchemaTable();
        scon.Close();

Hope This can help you.

Posted 23-Apr-11 3:04am

Prasanta_Prince