Retrieving Record using 3-tier architecture in asp.net using its Id how to do it?

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SQL-Server-2008R2

code in Data Access Layer

C#

public void FindRecord(int RollNumber)
       {
           using (SqlConnection con = new SqlConnection(cs))
           {
               using(SqlCommand cmd = new SqlCommand("spfindtblstudent",con))
               {
                   cmd.Parameters.Add("@RollNumber", RollNumber);
                   cmd.CommandType = CommandType.StoredProcedure;
                   con.Open();
                   cmd.ExecuteNonQuery();
               }
           }
       }

Code in Business Logic

C#

public void find(int RollNumber)
      {
          Dal objdal = new Dal();
          objdal.FindRecord(RollNumber);
      }

Code in code behind

protected void btnfind_Click(object sender, EventArgs e)
{

Bo objbo = new Bo();
objbo.Name = txtname.Text;
objbo.Address = txtaddress.Text;
objbo.Phone = txtphone.Text;
Bll objbll = new Bll();
objbll.find(RollNumber);

}

Not Working At all

Iam new to 3-Tier but trying to find the record what is thec code have to write and does my code make any sense
Please
Help me out
thanks in advance

Posted 31-Oct-14 20:27pm

raxhemanth

Updated 31-Oct-14 20:32pm

v2

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Comments

Robert Welliever 1-Nov-14 2:35am

If you are trying to find a record then you should execute a query instead of executing a non-query. What is your proc "spfindtblstudent" doing instead of selecting the record?

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DamithSL · Accepted Answer · 2014-10-31T20:34:00

ExecuteNonQuery is not return the results of sql statement which executed, you can use DataReader[^] or DataAdapter[^] to get DataSet or DataTable result. Read the documentation and check the samples in the MSDN for more information.
after you get DataTable or DataSet you can return that object from FindRecord method by changing the signature as below

C#

public DataTable FindRecord(int RollNumber)
{

      // retrieve data from database
      //finally return datatable; 
}

Then you can get the data table as below

C#

Dal objdal = new Dal();
DataTable dt= objdal.FindRecord(RollNumber);

sample code:

C#

public DataTable FindRecord(int RollNumber)
{
    using(SqlConnection sqlConn = new SqlConnection(cs))
    using(SqlCommand cmd = new SqlCommand("spfindtblstudent", sqlConn))
    {
        cmd.Parameters.Add("@RollNumber", RollNumber);
        cmd.CommandType = CommandType.StoredProcedure;
        sqlConn.Open();
        DataTable dt = new DataTable();
        dt.Load(cmd.ExecuteReader());
        return dt;
    }
}

I assume that your stored procedure having select statement which return matching data.