Question

I m trying to count the rows where SomeColumn=SomeValue. My code is shown below. It shows nothing.

using (SqlConnection conn = new SqlConnection("ConnectionString"))
{
    conn.Open();
    string selectStatement = "Select count(*) from Jobs where 'JobCategory=cse'";

    SqlCommand cmd = new SqlCommand(selectStatement, conn);
    int count = (int)cmd.ExecuteScalar();
    Label1.Text = count.ToString();

    conn.Close();

What step should I take?

Answer 1

Your single quotes are in wrong place. Try like this;

string selectStatement = "Select count(*) from Jobs where JobCategory = 'cse'";

And please parameterize your sql query always. This could be reason on SQL Injection attack. Here how you can use it;

string realcse = "Write here which value you want to filter in where clause";
string selectStatement = "Select count(*) from Jobs where JobCategory = @cse";
SqlCommand cmd = new SqlCommand(selectStatement, conn);
cmd.Parameters.AddWithValue("@cse", realcse);

In your case, it should be like;

string realcse = "cse";
cmd.Parameters.AddWithValue("@cse", realcse);