cant see gridview data that I want to see - sql

Question

In my Project I need that user will see the garages that in the same city of user .
I created users table that include - Id,UserName,Password,Email,CarModel,Year,City,
and another Table is GarageUsers that include -Id,UserName,Password,Email,Address,City,GarageName.
In Configure Data Source I insertes this code :
SELECT GargeUsers.GarageName, GargeUsers.Address,GargeUsers.City,GargeUsers.Email
FROM GargeUsers
INNER JOIN GarageuserCategory ON GargeUsers.Id = GarageuserCategory.UserId
I
WHERE (GarageuserCategory.CategoryId = 1) AND (GargeUsers.City LIKE Users.City)
(The GarageUserCategory is to show the data in the current category- its Ok ignore it).
In this code I see the all garages.
I add Session that save the user city when the user login.
But I cant see what I want in gridview. I need to know how to equal the session (USerCity) to garage city.
protected void LogIn_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["RegistrationConnectionString"].ConnectionString);
conn.Open();
string checkuser = "select count(*) from Users where UserName= '" + UserName.Text + "'";
SqlCommand com = new SqlCommand(checkuser, conn);
int temp = Convert.ToInt32(com.ExecuteScalar().ToString());
conn.Close();
if (temp == 1)
{
conn.Open();
string checkPasswordQuery = "select Password from Users where UserName= '" + UserName.Text + "'";
SqlCommand passComm = new SqlCommand(checkPasswordQuery, conn);
string password = passComm.ExecuteScalar().ToString().Replace(" ", "");
string UserCityQuery = "select City from Users where UserName= '" + UserName.Text + "'";
SqlCommand cityComm = new SqlCommand(UserCityQuery, conn);
string UserCity = cityComm.ExecuteScalar().ToString().Replace(" ", "");
if (password == Password.Text)
{
Session["UserCity"] = UserCity;
Session["New"] = UserName.Text;
Response.Write("Password is correct");
Response.Redirect("HomePage.aspx");
}
else
{
Response.Write("Password is not correct");
}
}
else
{
Response.Write("User Name is not correct");
}
}
}
}

Answer 1

You say
I need that user will see the garages that in the same city of user.
That seem like you need a filter to select USER
Also you say
(The GarageUserCategory is to show the data in the current category- its Ok ignore it).
So i remove it. Next time try make the query simple with only the problem you have
SELECT
GargeUsers.GarageName,
GargeUsers.Address,
GargeUsers.City,
GargeUsers.Email
FROM
GargeUsers INNER JOIN
Users ON GargeUsers.City = Users.City
WHERE
Users.UserID = #userID <-- ADD THIS ONE
To handle variable in SQL check SELECT #local_variable (Transact-SQL)
To select the cities garage after user Select a city in the page
SELECT
GargeUsers.GarageName,
GargeUsers.Address,
GargeUsers.City,
GargeUsers.Email
FROM
GargeUsers
WHERE
GargeUsers.City = #cityID