CODEWITHSUNDEEP
c#vb.netvisual-studio
John
John

Reputation: 21

How to show the result of condition in Visual Studio debugging?

How can I let me show the result of a condition in visual studio while debugging through? Let's say my code looks like:

If a > b andalso c > b andalso d < y then

If i step through I cannot see which of the three conditions are false. Is there a way to be able to?

Upvotes: 2

Views: 1229

Answers (6)

Mahmoud Nashaat
Mahmoud Nashaat

Reputation: 1

Try This :

if(a>b)
{
   if(c>b)
   {
      if(d<y)
      {
          /* Your code here */
      }
   }
}

Upvotes: 0

user6169399
user6169399

Reputation:

you may use System.Diagnostics
and use Debugger.Break() to stop debugger at this line and see the Debugger Output,
Like this sample code:

in C#: 

using System;
using System.Diagnostics;

class Test
{
    static volatile int a = a, b = 2, c = 3, d = 4, y = 5;
    static void Main(string[] args)
    {
        Debugger.Break();
        Debug.WriteLine("a > b:{0}", a > b);
        Debug.WriteLine("c > b:{0}", c > b);
        Debug.WriteLine("d < y:{0}", d < y);
        Debug.WriteLine("a > b && c > b && d < y:{0}", a > b && c > b && d < y);
        if (a > b && c > b && d < y)
        {
            Console.WriteLine("...");
        }
    }
}

or in VB:

Imports System
Imports System.Diagnostics

Module Module1

    Sub Main()

        Dim a As Integer = 1, b As Integer = 2, c As Integer = 3, d As Integer = 4, y As Integer = 5

        Debugger.Break()
        Debug.WriteLine("a > b:{0}", a > b)
        Debug.WriteLine("c > b:{0}", c > b)
        Debug.WriteLine("d < y:{0}", d < y)
        Debug.WriteLine("a > b && c > b && d < y:{0}", a > b AndAlso c > b AndAlso d < y)
        If a > b AndAlso c > b AndAlso d < y Then
            Console.WriteLine("...")
        End If
    End Sub

End Module

i hope this helps.

Upvotes: 0

dbasnett
dbasnett

Reputation: 11773

If I were having an issue with the code I would rewrite it like this so that it was clear and easy to debug.

    Dim aGTb As Boolean = a > b
    Dim cGTb As Boolean = c > b
    Dim dLTy As Boolean = d < y

    If aGTb AndAlso cGTb AndAlso dLTy Then

    End If

Upvotes: 0

jasdefer
jasdefer

Reputation: 785

You can use the immediate window and copy paste single conditions or anything else you like. This way you don't need to change your code.

Upvotes: 1

Fruchtzwerg
Fruchtzwerg

Reputation: 11389

You could use the debugconsole to write the results like this:

bool ab = a > b;
bool cb = c > b;
bool dy = d < y;

System.Diagnostics.Debug.WriteLine("a > b = " + ab + ", "c > b = " cb + ", d < y = " + dy");
if (ab && cd && dy)
{
  //Your code here
}

The 3 results are shown on the debugconsole like

a > b = true, c > b = false, d < y = true

Optional you could add a fourth boolean like

bool result = ab && cd && dy;

and print it also on the console.

Upvotes: 1

Sufyan Jabr
Sufyan Jabr

Reputation: 809

If you want to write a code in away which is the best for debugging it will horrible way of coding, e.g. the best way to rewrite the above for debugging as follows:

bool isValid = false;

isValid = isValid && a > b
isValid = isValid && c > b
isValid = isValid && d < y

Unless there is a certain logic in your program to find which part is failing... this way is nonsense, it just better if you add each part to the watch and validate it, overall debugging is not the purpose of code writing.

Upvotes: 0

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