🔒 Closed c# quantity

[anonymous_d]

pano po kaya yung ganyang error patulong po sa nakakaalam

 

[Aldnoa]

View attachment 586841pano po kaya yung ganyang error patulong po sa nakakaalam

Di ma read qty mo. Nasa baba na yung result paps

 

[anonymous_d]

pano po solution ?

 

[Aldnoa]

pano po solution ?

Make sure na yung qty textbox ay yung nakalagay dun sa qty = int.parse(qty textbox);

 

[Funyarinpa]

lagay ka default value/text dun sa textbox...
ex. 0...
wala kasing string na icoconvert dun sa parse function since walang value dun sa textbox...

 

[anonymous_d]

lagay ka default value/text dun sa textbox...
ex. 0...
wala kasing string na icoconvert dun sa parse function since walang value dun sa textbox...

di bale po sa mga double maglalagay po ko ng value?

 

[Aldnoa]

di bale po sa mga double maglalagay po ko ng value?

Ganto pre , yung textbox gawin mong combobox, tapos insert mo kung hanggang ilan quantity mo need
For example : 1 to 250
Para hindi mawalan ng laman yung ipaparse mong object.

 

[pixkit]

It doesn't make sense that you declared double type variables and you are parsing the input strings as int.

Here take a look of the difference You do not have permission to view the full content of this post. Log in or register now. . I'm not a C# developer but the idea is similar with other languages like Java.

These will work:

double to double

using System;

class MainClass {
  public static void Main (string[] args) {
    Console.WriteLine ("Hello World");

    double amt;
    double ans;
    double qty;

    amt = double.Parse("100.00");
    qty = double.Parse("51.50");
    ans = amt * qty;

    Console.WriteLine(ans);
  }
}

int to int

using System;

class MainClass {
  public static void Main (string[] args) {
    Console.WriteLine ("Hello World");

    int amt;
    int ans;
    int qty;

    amt = int.Parse("100");
    qty = int.Parse("51");
    ans = amt * qty;

    Console.WriteLine(ans);
  }
}

But these will fail and will throw
Unhandled Exception:
System.FormatException: Input string was not in a correct format.

     int amt;
    int ans;
    int qty;

    amt = int.Parse("100");
    qty = int.Parse("51.50");
    ans = amt * qty;

    Console.WriteLine(ans);
    
    
    # Or
    
    double amt;
    double ans;
    double qty;

    amt = int.Parse("100.00");
    qty = int.Parse("51.50");
    ans = amt * qty;

    Console.WriteLine(ans);

The error matches on the screenshot you provided.

 

[pixkit]

If you wanna play around first before messing with your code, I suggest you use an online REPL for C# like this one You do not have permission to view the full content of this post. Log in or register now.