Error 2: Operator '==' cannot be applied to operands of type 'string' and 'int'

Question

denmarkstan 0 Junior Poster in Training

13 Years Ago

please i need help here. let someone help me to debug this i attach the project bon compressed folder:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{

    public partial class Form1 : Form
    {
        //static SqlConnection conn;
        //System.Data.SqlClient.SqlConnection conn;
        //string str = ConfigurationManager.ConnectionStrings["TimeDataConnectionString1"].ConnectionString;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("work");
        }

        private void timer1_Tick(object sender, EventArgs e)
        {           
            lblTime.Text = "Present Time :" + DateTime.Now.ToShortTimeString();
            lblTime.Visible = !lblTime.Visible;
            label4.Text = "Today Is :";
            label4.Visible = !label4.Visible;
            int hour = DateTime.Now.Hour;
            string day = Convert.ToString(DateTime.Today.DayOfWeek);
            string tim = Convert.ToString(DateTime.Now.Minute);
            string msgdta = "mon8"; string msgdta2 = "mon10"; string msgdta3 = "mon12"; string msgdta4 = "mon2"; 
            string msgdta5 = "tues8"; string msgdta6 = "tues10"; string msgdta7 = "tues12"; string msgdta8 = "tues2";
            string msgdta9 = "wed8"; string msgdta10 = "wed10"; string msgdta11 = "wed12"; string msgdta12 = "wed2";
            string msgdta13 = "thus8"; string msgdta14 = "thus10"; string msgdta15 = "thus12"; string msgdta16 = "thus2";
            string msgdta17 = "frd8"; string msgdta18 = "frd10"; string msgdta19 = "frd12"; string msgdta20 = "frd2"; 
            if (day == Monday && hour == 8 && tim == 12)
            {
                MondLectures(msgdta);
            }
            else if (day == Monday && hour == 10 && tim == 12)
            {
                MondLectures(msgdta2);
            }
            else if (day == Monday && hour == 12 && tim == 12)
            {
                MondLectures(msgdta3);
            }
            else if (day == Monday && hour == 2 && tim == 12)
            {
                MondLectures(msgdta4);
            }
            else if (day == Tuesday && hour == 8 && tim == 12)
            {
                TuesdayLectures(msgdta5);
            }
            else if (day == Tuesday && hour == 10 && tim == 12)
            {
                TuesdayLectures(msgdta6);
            }
            else if (day == Tuesday && hour == 12 && tim == 12)
            {
                TuesdayLectures(msgdta7);
            }
            else if (day == Tuesday && hour == 2 && tim == 12)
            {
                TuesdayLectures(msgdta8);
            }
            else if (day == Wednesday && hour == 8 && tim == 12)
            {
                WednesdayLectures(msgdta9);
            }
            else if (day == Wednesday && hour == 10 && tim == 12)
            {
                WednesdayLectures(msgdta10);
            }
            else if (day == Wednesday && hour == 12 && tim == 12)
            {
                WednesdayLectures(msgdta11);
            }
            else if (day == Wednesday && hour == 2 && tim == 12)
            {
                WednesdayLectures(msgdta12);
            }
            else if (day == Thursday && hour == 8 && tim == 12)
            {
                ThursdayLectures(msgdta13);
            }
            else if (day == Thursday && hour == 10 && tim == 12)
            {
                ThursdayLectures(msgdta14);
            }
            else if (day == Thursday && hour == 12 && tim == 12)
            {
                ThursdayLectures(msgdta15);
            }
            else if (day == Thursday && hour == 2 && tim == 12)
            {
                ThursdayLectures(msgdta16);
            }
            else if (day == Friday && hour == 8 && tim == 12)
            {
                FridayLectures(msgdta17);
            }
            else if (day == Friday && hour == 10 && tim == 12)
            {
                FridayLectures(msgdta18);
            }
            else if (day == Friday && hour == 12 && tim == 12)
            {
                FridayLectures(msgdta19);
            }
            else if (day == Friday && hour == 2 && tim == 12)
            {
                FridayLectures(msgdta20);
            }
            else
            {
                groupBox1.Controls.Clear();
                Label lblMsg = new Label();
                lblMsg.AutoSize = true;
                lblMsg.BackColor = System.Drawing.Color.Brown;
                lblMsg.Font = new System.Drawing.Font("Microsoft Sans Serif", 20F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
                lblMsg.ForeColor = System.Drawing.SystemColors.Control;
                lblMsg.Location = new System.Drawing.Point(144, 109);
                lblMsg.Name = "label1";
                lblMsg.Size = new System.Drawing.Size(234, 31);
                lblMsg.TabIndex = 16;
                lblMsg.Text = "Classes are over";
                groupBox1.Controls.Add(lblMsg);

            }
        }
   


        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
        {
            label5.Text = "Ongoing Courses at present time:";
            label5.Visible = !label5.Visible;

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        void MondLectures(string daytime)
        {
            
            using (SqlConnection conn = new SqlConnection())
            {

                //System.Data.SqlClient.SqlConnection conn;
                //conn = new System.Data.SqlClient.SqlConnection();
                conn.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\TimeData.mdf;Integrated Security=True;User Instance=True";

                const string query = "select hour,400levcos,400levlec, 300levcos,300levlec, 200levcos,200levlec, 100levcos,100levlec from timetable where Daytime = @Daytime";
                DataTable timeresult = new DataTable();

                conn.Open();
                using (SqlCommand cmd = new SqlCommand(query, conn))
                {
                    cmd.Parameters.Add("@daytime", SqlDbType.VarChar).Value = daytime;
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        da.Fill(timeresult);
                    }
                }

                string strcos4 = Convert.ToString(timeresult.Rows[0]["400levcos"]);
                string strlec4 = Convert.ToString(timeresult.Rows[0]["400levlec"]);
                string strcos3 = Convert.ToString(timeresult.Rows[0]["300levcos"]);
                string strlec3 = Convert.ToString(timeresult.Rows[0]["300levlec"]);
                string strcos2 = Convert.ToString(timeresult.Rows[0]["200levcos"]);
                string strlec2 = Convert.ToString(timeresult.Rows[0]["200levlec"]);

                string strcos1 = Convert.ToString(timeresult.Rows[0]["100levcos"]);
                string strlec1 = Convert.ToString(timeresult.Rows[0]["100levlec"]);

                lblLet1.Text = strcos4.ToString();
                lblcor1.Text = strlec4.ToString();

                lblcor2.Text = strcos3.ToString();
                lblLet2.Text = strlec3.ToString();

                lblcor3.Text = strcos2.ToString();
                lblLet3.Text = strlec2.ToString();

                lblcor4.Text = strcos1.ToString();
                lblLet4.Text = strlec1.ToString();
            }
        }
        void TuesdayLectures(string daytime)
        {
            
            using (SqlConnection conn = new SqlConnection())
            {

                //System.Data.SqlClient.SqlConnection conn;
                //conn = new System.Data.SqlClient.SqlConnection();
                conn.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\TimeData.mdf;Integrated Security=True;User Instance=True";

                const string query = "select hour,400levcos,400levlec, 300levcos,300levlec, 200levcos,200levlec, 100levcos,100levlec from timetable where Daytime = @Daytime";
                DataTable timeresult = new DataTable();

                conn.Open();
                using (SqlCommand cmd = new SqlCommand(query, conn))
                {
                    cmd.Parameters.Add("@daytime", SqlDbType.VarChar).Value = daytime;
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        da.Fill(timeresult);
                    }
                }

                    string strcos4 = Convert.ToString(timeresult.Rows[0]["400levcos"]);
                    string strlec4 = Convert.ToString(timeresult.Rows[0]["400levlec"]);
                    string strcos3 = Convert.ToString(timeresult.Rows[0]["300levcos"]);
                    string strlec3 = Convert.ToString(timeresult.Rows[0]["300levlec"]);
                    string strcos2 = Convert.ToString(timeresult.Rows[0]["200levcos"]);
                    string strlec2 = Convert.ToString(timeresult.Rows[0]["200levlec"]);

                    string strcos1 = Convert.ToString(timeresult.Rows[0]["100levcos"]);
                    string strlec1 = Convert.ToString(timeresult.Rows[0]["100levlec"]);
                    
                        lblLet1.Text = strcos4.ToString();
                        lblcor1.Text = strlec4.ToString();

                        lblcor2.Text = strcos3.ToString();
                        lblLet2.Text = strlec3.ToString();

                        lblcor3.Text = strcos2.ToString();
                        lblLet3.Text = strlec2.ToString();

                        lblcor4.Text = strcos1.ToString();
                        lblLet4.Text = strlec1.ToString();
        }
        }
        void WednesdayLectures(string daytime)
        {
            
            using (SqlConnection conn = new SqlConnection())
            {

                //System.Data.SqlClient.SqlConnection conn;
                //conn = new System.Data.SqlClient.SqlConnection();
                conn.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\TimeData.mdf;Integrated Security=True;User Instance=True";

                const string query = "select hour,400levcos,400levlec, 300levcos,300levlec, 200levcos,200levlec, 100levcos,100levlec from timetable where Daytime = @Daytime";
                DataTable timeresult = new DataTable();

                conn.Open();
                using (SqlCommand cmd = new SqlCommand(query, conn))
                {
                    cmd.Parameters.Add("@daytime", SqlDbType.VarChar).Value = daytime;
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        da.Fill(timeresult);
                    }
                }

                    string strcos4 = Convert.ToString(timeresult.Rows[0]["400levcos"]);
                    string strlec4 = Convert.ToString(timeresult.Rows[0]["400levlec"]);
                    string strcos3 = Convert.ToString(timeresult.Rows[0]["300levcos"]);
                    string strlec3 = Convert.ToString(timeresult.Rows[0]["300levlec"]);
                    string strcos2 = Convert.ToString(timeresult.Rows[0]["200levcos"]);
                    string strlec2 = Convert.ToString(timeresult.Rows[0]["200levlec"]);

                    string strcos1 = Convert.ToString(timeresult.Rows[0]["100levcos"]);
                    string strlec1 = Convert.ToString(timeresult.Rows[0]["100levlec"]);
                    
                        lblLet1.Text = strcos4.ToString();
                        lblcor1.Text = strlec4.ToString();

                        lblcor2.Text = strcos3.ToString();
                        lblLet2.Text = strlec3.ToString();

                        lblcor3.Text = strcos2.ToString();
                        lblLet3.Text = strlec2.ToString();

                        lblcor4.Text = strcos1.ToString();
                        lblLet4.Text = strlec1.ToString();
        }
        }
        void ThursdayLectures(string daytime)
        {
            
            using (SqlConnection conn = new SqlConnection())
            {

                //System.Data.SqlClient.SqlConnection conn;
                //conn = new System.Data.SqlClient.SqlConnection();
                conn.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\TimeData.mdf;Integrated Security=True;User Instance=True";

                const string query = "select hour,400levcos,400levlec, 300levcos,300levlec, 200levcos,200levlec, 100levcos,100levlec from timetable where Daytime = @daytime";
                DataTable timeresult = new DataTable();

                conn.Open();
                using (SqlCommand cmd = new SqlCommand(query, conn))
                {
                    cmd.Parameters.Add("@daytime", SqlDbType.VarChar).Value = daytime;
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        da.Fill(timeresult);
                    }
                }

                    string strcos4 = Convert.ToString(timeresult.Rows[0]["400levcos"]);
                    string strlec4 = Convert.ToString(timeresult.Rows[0]["400levlec"]);
                    string strcos3 = Convert.ToString(timeresult.Rows[0]["300levcos"]);
                    string strlec3 = Convert.ToString(timeresult.Rows[0]["300levlec"]);
                    string strcos2 = Convert.ToString(timeresult.Rows[0]["200levcos"]);
                    string strlec2 = Convert.ToString(timeresult.Rows[0]["200levlec"]);

                    string strcos1 = Convert.ToString(timeresult.Rows[0]["100levcos"]);
                    string strlec1 = Convert.ToString(timeresult.Rows[0]["100levlec"]);
                    
                        lblLet1.Text = strcos4.ToString();
                        lblcor1.Text = strlec4.ToString();

                        lblcor2.Text = strcos3.ToString();
                        lblLet2.Text = strlec3.ToString();

                        lblcor3.Text = strcos2.ToString();
                        lblLet3.Text = strlec2.ToString();

                        lblcor4.Text = strcos1.ToString();
                        lblLet4.Text = strlec1.ToString();
        }
        }
        void FridayLectures(string daytime)
        {
            
            using (SqlConnection conn = new SqlConnection())
            {

                //System.Data.SqlClient.SqlConnection conn;
                //conn = new System.Data.SqlClient.SqlConnection();
                conn.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\TimeData.mdf;Integrated Security=True;User Instance=True";

                const string query = "select hour,400levcos,400levlec, 300levcos,300levlec, 200levcos,200levlec, 100levcos,100levlec from timetable where Daytime = @Daytime";
                DataTable timeresult = new DataTable();

                conn.Open();
                using (SqlCommand cmd = new SqlCommand(query, conn))
                {
                    cmd.Parameters.Add("@daytime", SqlDbType.VarChar).Value = daytime;
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        da.Fill(timeresult);
                    }
                }

                string strcos4 = Convert.ToString(timeresult.Rows[0]["400levcos"]);
                string strlec4 = Convert.ToString(timeresult.Rows[0]["400levlec"]);
                string strcos3 = Convert.ToString(timeresult.Rows[0]["300levcos"]);
                string strlec3 = Convert.ToString(timeresult.Rows[0]["300levlec"]);
                string strcos2 = Convert.ToString(timeresult.Rows[0]["200levcos"]);
                string strlec2 = Convert.ToString(timeresult.Rows[0]["200levlec"]);

                string strcos1 = Convert.ToString(timeresult.Rows[0]["100levcos"]);
                string strlec1 = Convert.ToString(timeresult.Rows[0]["100levlec"]);

                lblLet1.Text = strcos4.ToString();
                lblcor1.Text = strlec4.ToString();

                lblcor2.Text = strcos3.ToString();
                lblLet2.Text = strlec3.ToString();

                lblcor3.Text = strcos2.ToString();
                lblLet3.Text = strlec2.ToString();

                lblcor4.Text = strcos1.ToString();
                lblLet4.Text = strlec1.ToString();
            }
        }


        private void groupBox1_Enter(object sender, EventArgs e)
        {

        }

        private void dateTimePicker1_ValueChanged_1(object sender, EventArgs e)
        {


        }
    }

        }

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Latest Post 13 Years Ago Latest Post by Medalgod

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Medalgod 7 Light Poster · Answer 1 · 2010-11-24T02:49:49+00:00

The error in the thread title is caused when you try and compare a string with an int.
The standard way to resolve this is to put .ToString() on the end of the int.

e.g.

int num = 1;
string text = "1";

if(num == text)

Here, the "num == text" is not possible, as they are not the same data type.
The correct code is:

int num = 1;
string text = "1";

if(num.ToString() == text)