private void button1_Click(object sender, EventArgs e)
        {

            string a = textBox1.Text;

            int b = int.Parse(textBox2.Text);
            bool bl = ceshi(a, b);
                   if (bl)
            {

                MessageBox.Show("成功");
            }
            else
            {

                MessageBox.Show("SHIBAI");
            }
        }
        public bool ceshi(string a, int b)
        {

            string sqlconnectionstring = "server=localhost;database=ceshi;integrated security=SSPI";
            SqlConnection con = new SqlConnection(sqlconnectionstring);
            con.Open();
            //string commandtext = "select * from Table_1 where name=@name and passward=@passward";

            string commandtext = "select * from Table_1 where name=" + a + "and passward=" + b;

            SqlCommand cmd = new SqlCommand(commandtext, con);
            //cmd.Parameters.Add("@name", SqlDbType.VarChar);
            //cmd.Parameters["@name"].Value = "a";
            //cmd.Parameters.Add("@passward", SqlDbType.Int);
            //cmd.Parameters["@passward"].Value = b;

            //SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            //DataSet ds = new DataSet();
            //adapter.Fill(ds);
            //return ds.Tables.Count;
            SqlDataReader reader = cmd.ExecuteReader();
           
            //return reader.HasRows;
            if (reader.Read())
            {
                return true;
            }
            else
            {
                return false;
            }
            con.Close();
           
        }我在数据库建的字段name 为varchar,passward为int，提示说passward附近有错误