letter grading system in web form c#

Nawaraj Bardewa

I need to calculate all the grade of all subject with theory and practical. by this code successfully calculated practical grade part, but in theory it only calculate upto 2.8 gp and grade C, How can I solve this problem? What's wrong here? Could someone please help me??

Code:

double th1, pr1, th2, pr2, th3, pr3, th4, pr4, th5, pr5, th6, pr6;
th1 = Convert.ToDouble(txtth1.Text);
th2 = Convert.ToDouble(txtth2.Text);
th3 = Convert.ToDouble(txtth3.Text);
th4 = Convert.ToDouble(txtth4.Text);
th5 = Convert.ToDouble(txtth5.Text);
th6 = Convert.ToDouble(txtth6.Text);
pr1 = Convert.ToDouble(txtpr1.Text);
pr2 = Convert.ToDouble(txtpr2.Text);
pr3 = Convert.ToDouble(txtpr3.Text);
pr4 = Convert.ToDouble(txtpr4.Text);
pr5 = Convert.ToDouble(txtpr5.Text);
pr6 = Convert.ToDouble(txtpr6.Text);

//Calculate grade point for theory//
if (th1 <= 14.85 || th2 <= 14.85 || th3 <= 14.85 || th4 <= 14.85 || th5 <= 14.85 || th6 <= 14.85)
{
gp1.Text = "0.8";
grade1.Text = "E";
}
else if (th1 <= 22.35 || th2 <= 22.35 || th3 <= 22.35 || th4 <= 22.35 || th5 <= 22.35 || th6 <= 22.35)
{
gp1.Text = "1.2";
grade1.Text = "D";
}
else if (th1 <= 29.85 || th2 <= 29.85 || th3 <= 29.85 || th4 <= 29.85 || th5 <= 29.85 || th6 <= 29.85)
{
gp1.Text = "1.6";
grade1.Text = "D+";
}
else if (th1 <= 37.35 || th2 <= 37.35 || th3 <= 37.35 || th4 <= 37.35 || th5 <= 37.35 || th6 <= 37.35)
{
gp1.Text = "2.0";
grade1.Text = "B";
}
else if (th1 <= 44.85 || th2 <= 44.85 || th3 <= 44.85 || th4 <= 44.85 || th5 <= 44.85 || th6 <= 44.85)
{
gp1.Text = "2.4";
grade1.Text = "B+";
}
else if (th1 <= 52.35 || th2 <= 52.35 || th3 <= 52.35 || th4 <= 52.35 || th5 <= 52.35 || th6 <= 52.35)
{
gp1.Text = "2.8";
grade1.Text = "C";
}
else if (th1 >= 59.85 || th2 <= 59.85 || th3 <= 59.85 || th4 <= 59.85 || th5 <= 59.85 || th6 <= 59.85)
{
gp1.Text = "3.2";
grade1.Text = "C+";
}
else if (th1 <= 67.35 || th2 <= 67.35 || th3 <= 67.35 || th4 <= 67.35 || th5 <= 67.35 || th6 <= 67.35)
{
gp1.Text = "3.6";
grade1.Text = "A";
}
else if (th1 <= 75 || th2 <= 75 || th3 <= 75 || th4 <= 75 || th5 <= 75 || th6 <= 75)
{
gp1.Text = "4.0";
grade1.Text = "A+";
}
//Calculate grade point for practical//
if (pr1 <= 4.95 || pr2 <= 4.95 || pr3 <= 4.95 || pr4 <= 4.95 || pr5 <= 4.95 || pr6 <= 4.95)
{
p_gp1.Text = "0.8";
p_grade1.Text = "E";
}
else if (pr1 <= 7.45 || pr2 <= 7.45 || pr3 <= 7.45 || pr4 <= 7.45 || pr5 <= 7.45 || pr6 <= 7.45)
{
p_gp1.Text = "1.2";
p_grade1.Text = "D";
}
else if (pr1 <= 9.95 || pr2 <= 9.95 || pr3 <= 9.95 || pr4 <= 9.95 || pr5 <= 9.95 || pr6 <= 9.95)
{
p_gp1.Text = "1.6";
p_grade1.Text = "D+";
}
else if (pr1 <= 12.45 || pr2 <= 12.45 || pr3 <= 12.45 || pr4 <= 12.45 || pr5 <= 12.45 || pr6 <= 12.45)
{
p_gp1.Text = "2.0";
p_grade1.Text = "B";
}
else if (pr1 <= 14.95 || pr2 <= 14.95 || pr3 <= 14.95 || pr4 <= 14.95 || pr5 <= 14.95 || pr6 <= 14.95)
{
p_gp1.Text = "2.4";
p_grade1.Text = "B+";
}
else if (pr1 <= 17.45 || pr2 <= 17.45 || pr3 <= 17.45 || pr4 <= 17.45 || pr5 <= 17.45 || pr6 <= 17.45)
{
p_gp1.Text = "2.8";
p_grade1.Text = "C";
}
else if (pr1 <= 19.95 || pr2 <= 19.95 || pr3 <= 19.95 || pr4 <= 19.95 || pr5 <= 19.95 || pr6 <= 19.95)
{
p_gp1.Text = "3.2";
p_grade1.Text = "C+";
}
else if (pr1 <= 22.45 || pr2 <= 22.45 || pr3 <= 22.45 || pr4 <= 22.45 || pr5 <= 22.45 || pr6 <= 22.45)
{
p_gp1.Text = "3.6";
p_grade1.Text = "A";
}
else if (pr1 <= 25 || pr2 <= 25 || pr3 <= 25 || pr4 <= 25 || pr5 <= 25 || pr6 <= 25)
{
p_gp1.Text = "4.0";
p_grade1.Text = "A+";
}

9 Replies

Know the answer? Post it — somebody with the same question will find it here.

Nitin Sontakke4y ago
My code should work with .Net 2.0 as well and even classic ASP.NET

Just paste the classes in aspx.cs and it should work.

For AnyDesk you will need to share the date + time.
Nawaraj Bardewa4y ago
Thank you Sir, the code you provide me may for MVC Project, But I am using ASP.NET C# webform like Default.aspx, Could you please help me using AnyDesk?
Nitin Sontakke4y ago
Please see below line from your code in Theory portion:

else if (th1 >= 59.85 || th2 <= 59.85 || th3 <= 59.85 || th4 <= 59.85 || th5 <= 59.85 || th6 <= 59.85)

EVERYWHERE you have used <= but in above line notice >=.

Is this a typing mistake? Can you please modify that and try again?
Nitin Sontakke4y ago
You can even try something like this:
public class Grade
{
  public Double GradePercent { get; set; }

  public String GradeText { get; set; }
}

public class GradeRange
{
  public Double[] MarkTo { get; set; }

  public Grade[] Grade { get; set; }
}

public class Theory
{
  public static GradeRange GradeRange { get; set; } = new GradeRange() { MarkTo = new Double[] { 14.85, 22.35, 29.85, 37.35, 44.85, 52.35, 59.85, 67.35, 75 }, Grade = new Grade[] { new Grade { GradePercent = 0.8, GradeText = "E" }, new Grade { GradePercent = 1.2, GradeText = "D" }, new Grade { GradePercent = 1.6, GradeText = "D+" }, new Grade { GradePercent = 2.0, GradeText = "B" }, new Grade { GradePercent = 2.4, GradeText = "B+" }, new Grade { GradePercent = 2.8, GradeText = "C" }, new Grade { GradePercent = 3.2, GradeText = "C+" }, new Grade { GradePercent = 3.6, GradeText = "A" }, new Grade { GradePercent = 4.0, GradeText = "A+" } } };

  public static Grade GetGrade(List Marks)
  {
    Marks.Sort();
    foreach (Double mark in Marks)
    {
      if (mark < 0 || mark > 75)
        throw new ArgumentOutOfRangeException("Marks", "Marks should be between 0.01 and 75.00");

      for (Int16 index = 0; index < GradeRange.MarkTo.Length; index++)
      {
        if (mark < GradeRange.MarkTo[index])
          return GradeRange.Grade[index];
      }
    }
    return null;
  }

}

public class Practical
{
  public static GradeRange GradeRange { get; set; } = new GradeRange() { MarkTo = new Double[] { 4.95, 7.45, 9.95, 12.45, 14.95, 17.45, 19.95, 22.45, 25 }, Grade = new Grade[] { new Grade { GradePercent = 0.8, GradeText = "E" }, new Grade { GradePercent = 1.2, GradeText = "D" }, new Grade { GradePercent = 1.6, GradeText = "D+" }, new Grade { GradePercent = 2.0, GradeText = "B" }, new Grade { GradePercent = 2.4, GradeText = "B+" }, new Grade { GradePercent = 2.8, GradeText = "C" }, new Grade { GradePercent = 3.2, GradeText = "C+" }, new Grade { GradePercent = 3.6, GradeText = "A" }, new Grade { GradePercent = 4.0, GradeText = "A+" } } };

  public static Grade GetGrade(List Marks)
  {
    Marks.Sort();
    foreach (Double mark in Marks)
    {
      if (mark < 0 || mark > 25)
        throw new ArgumentOutOfRangeException("Marks", "Marks should be between 0.01 and 25.00");

      for (Int16 index = 0; index < GradeRange.MarkTo.Length; index++)
      {
        if (mark < GradeRange.MarkTo[index])
          return GradeRange.Grade[index];
      }
    }
    return null;
  }

}
And then:
Grade grade = Theory.GetGrade(new List() { th1, th2, th3, th4, th5, th6 });
gp1.Text = grade.GradePercent.ToString();
grade1.Text = grade.GradeText;

grade = Practical.GetGrade(new List() { pr1, pr2, pr3, pr4, pr5, pr6 });
p_gp1.Text = grade.GradePercent.ToString(); ;
p_grade1.Text = grade.GradeText;
Hope it helps!
Nitin Sontakke4y ago
Unfortunately, it is still not clear to me?

Is it possible to connect over Google Meet?

Please send me an invite to - nitin dot n dot sontakke at gmail dot com

Or send me the time window which suits best to you.
Nawaraj Bardewa4y ago
In my above code th1, th2, th3, th4, th5, th6 are textbox value for theory marks.
Nawaraj Bardewa4y ago
Dear Sir,

I am new in Asp.Net c#, The posted code I am using is for this grading system.

Now I am explaining my problem with this picture, Could you please help me? thanks in advance.
Nitin Sontakke4y ago
Please be EXTREMELY precise in your resonses. Because there is no way for me know unless you explicitly mention things.

For whatever input you provided, you didn't mention what is EXPECTED output and what is CURRENT output.

Your screenshot is not showing output text boxes.

Please SHARE all the information and DO NOT assume anything.
Nitin Sontakke4y ago
Can you please provide a sample input data, when entered, you think it is all going wrong?