string conversion problem , string is either decimal or integer or null or balnk.

Question

0.00/5 (No votes)

See more:

if write convert.ToInt32() then it doesnot convert "" to 0 and also it does not convert 1.00 to 1. it only converts only integer format strings to int32.
if i use int.tryparse
it checkes if string is "" then assigns to 0 to varable but
i miss 1.00 as its not converted to 1

any help is appriciated thank you.

Posted 2-Feb-15 2:03am

varun150

Add a Solution

Comments

CHill60 2-Feb-15 8:14am

What are you actually trying to do? You might need to manipulate or validate the strings before you get to this point.

varun150 3-Feb-15 1:29am

i wanted to pass a integer variable to database.

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2015-02-02T02:14:00

Solution 1

Well yes - it's an integer converter, so a floating point value is not valid: it only parses valid integer strings!

I would use int.TryParse first, and if that failed, try again with double.TryParse. If that succeeds, then cast the value to an int (assuming it fits) and continue.
If that fails, then report an error or use your default.

Posted 2-Feb-15 2:14am

OriginalGriff

Comments

varun150 3-Feb-15 0:05am

thanks for your response! griff i thought there would be something like val() in vb.net thats why asked this question.
in vb.net all i did is use val() function it returns integer from string.

Peter Leow · Accepted Answer · 2015-02-02T02:29:00

Try TryParse[^] for different types, like this:

C#

using System;

public class Program
{
    public static void Main()
    {
        string[] numberString = {"", "1", "1.00"}

        ;
        int intNumber;
        decimal decimalNumber;
        for (int i = 0; i < numberString.Length; i++)
        {
            if (Int32.TryParse(numberString[i], out intNumber))
            {
                Console.WriteLine(intNumber);
            }
            else if (Decimal.TryParse(numberString[i], out decimalNumber))
            {
                Console.WriteLine(decimalNumber);
            }
            else
            {
                Console.WriteLine("Conversion failed!");
            }
        }
    }
}