{"パラメータ化されたクエリ '（@Usr_Name nvarchar（4000）.... nv'は、提供されなかったパラメータ '@Usr_Name'を要求します）"}

Question

ここでは、 DBに詳しく、私は私の最後で解決しようとしているが、そう

public ActionResult Create(UserModel usr) 
{ 
    con.Open(); 
    string query = "Insert into Tbl_User Values(@Usr_Name,@FirstName,@LastName,@Gender,@Phone,@Address,@Email)"; 
    SqlCommand cmd = new SqlCommand(query, con); 
    SqlParameter usrname = cmd.Parameters.AddWithValue("@Usr_Name", usr.Usr_Name); 
    if (usr.Usr_Name == null) 
    { 
     usrname.Value = DBNull.Value; 
    } 
    SqlParameter fname = cmd.Parameters.AddWithValue("@FirstName", usr.First_Name); 
    if (usr.First_Name == null) 
    { 
     fname.Value = DBNull.Value; 
    } 
    cmd.Parameters.AddWithValue("@LastName", usr.Last_Name); 
    cmd.Parameters.AddWithValue("@Gender", usr.Gender); 
    cmd.Parameters.AddWithValue("@Phone", usr.Phone); 
    cmd.Parameters.AddWithValue("@Address", usr.Address); 
    cmd.Parameters.AddWithValue("@Email", usr.Email); 
    cmd.ExecuteNonQuery(); 

    return RedirectToAction("Index"); 
} 

Answer 1

Comment : // Problem in your query. Please write Actual DB Field Name of 
your SQL in below line. 

public ActionResult Create(UserModel usr) 
{ 
    con.Open(); 
    Comment : // Problem in your query. Please write Actual DB Field Name 
        of your SQL in below line. 

string query = "Insert into Tbl_User 
(Field1,Field2,Field3,Field4,Field5,Field6,Field7) 
Values(@Usr_Name,@FirstName,@LastName,@Gender,@Phone,@Address,@Email)"; 
    SqlCommand cmd = new SqlCommand(query, con); 
    SqlParameter usrname = cmd.Parameters.AddWithValue("@Usr_Name", 
    usr.Usr_Name); 
if (usr.Usr_Name == null) 
{ 
    usrname.Value = DBNull.Value; 
} 
SqlParameter fname = cmd.Parameters.AddWithValue("@FirstName", usr.First_Name); 
if (usr.First_Name == null) 
{ 
    fname.Value = DBNull.Value; 
} 
cmd.Parameters.AddWithValue("@LastName", usr.Last_Name); 
cmd.Parameters.AddWithValue("@Gender", usr.Gender); 
cmd.Parameters.AddWithValue("@Phone", usr.Phone); 
cmd.Parameters.AddWithValue("@Address", usr.Address); 
cmd.Parameters.AddWithValue("@Email", usr.Email); 
cmd.ExecuteNonQuery(); 

return RedirectToAction("Index"); 
}