how to retrive particular data from table and store in String variable?

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//table is Question and colums are question_id,teacher_id,teacher_question,teacher_answer
//table is Answer and colums are Answer_id,Question_id,student_id,student_answer
//here is code

C#

int qu_i = Convert.ToInt32(TextBox1.Text);
            cmd1 = new SqlCommand("select ans from Que1 where que_id=@qu_i",con);
          string s1 = Convert.ToString(cmd1);
          Label4.Text = Convert.ToString(cmd1);

            //Decimal sa = Convert.ToDecimal(cmd1);
         // Response.Write(s1);
           int qu_id = Convert.ToInt32(TextBox1.Text);
           cmd2 = new SqlCommand("select ans123 from Ans1 where que_id=@qu_i", con);
           Label5.Text = Convert.ToString(cmd2);
           string s2 = Convert.ToString(cmd2);

           Response.Write(s2);
          // Decimal sb = Convert.ToDecimal(cmd2);
          // int j = cmd2.ExecuteNonQuery();
          // s1 = Convert.ToString(i);
            //s2 = Convert.ToString(j);
               MatchsMaker match = new MatchsMaker(s1,s2);// this line is for comparing two strings
               b = match.Score;
               Response.Write(b);
           // Response.Write(match.Score);
            Label3.Text = Convert.ToString(match.Score);

Posted 19-Mar-14 5:55am

swati gapat

Updated 19-Mar-14 19:24pm

VICK

v2

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OriginalGriff · Accepted Answer · 2014-03-19T06:11:00

Creating an SqlCommand object does not fetch anything from a database - you have to specifically instruct it to execute the command - which your code doesn't do. In addition, converting an SqlCommand object to a string will just return "System.Data.SqlClient.SqlCommand" rather than any data it might be associated with. And it would help if you passed your parameterized value over as well...

Try this:

C#

using (SqlConnection con = new SqlConnection(strConnect))
    {
    con.Open();
    using (SqlCommand cmd = new SqlCommand("SELECT ans FROM Que1 WHERE que_id=@qu_i", con))
        {
        cmd.Parameters.AddWithValue("@qu_i", qu_i);
        using (SqlDataReader reader = cmd.ExecuteReader())
            {
            while (reader.Read())
                {
                string ans = (string) reader["ans"];
                Console.WriteLine("Answer is: {0}", ans);
                }
            }
        }
    }