Develop Reference

Verify empty field Selenium C#

I am trying to check if a text field is empty and I can't convert bool to string.
I am trying this:
var firstName = driver.FindElement(By.Id("name_3_firstname"));
if (firstName.Equals(" ")) {
Console.WriteLine("This field can not be empty");
}
Also, how can I check if certain number field is exactly 20 digits?
Can you help me do this?
Thank you in advance!

If it's string, then you can use string.Empty or "", because " " contains a space, therefore it's not empty.
For those 20 digits, you can use a bit of a workaround field.ToString().Length == 20 or you can repetitively divide it by 10 until the resulting value is 0, but I'd say the workaround might be easier to use.
This is more of a general C# answer. I'm not exactly sure how well it's gonna work in Selenium, but I've checked and string.Empty and ToString() appear to exist there.

For Empty / White space / Null, use following APIs of the string class
string.IsNullOrEmpty(value) or
string.IsNullOrWhiteSpace(value)
For exact 20 digits, best is to use the Regular expression as follows, this can also be converted to range and combination of digits and characters if required. Current regular expression ensures that beginning, end and all components are digits
string pattern = #"^\d{20}$";
var booleanResult = Regex.Match(value,pattern).Success

I'm not sure that this way will work in your case. Code:
var firstName = driver.FindElement(By.Id("name_3_firstname"));
will return to You IWebElement object. First you should try to get text of this element. Try something like firstName.Text or firstName.getAttribute("value");. When u will have this you will able to check
:
var text = firstName.getAttribute("value");
if(string.IsNullOrEmpty(text)){ // do something }
if(text.length == 20) {// do something}

Read input with different datatypes and space seperation

I'm trying to figure out how to write code to let the user input three values (string, int, int) in one line with space to separate the values.
I thought of doing it with String.Split Method but that only works if all the values have the same datatype.
How can I do it with different datatypes?
For example:
The user might want to input
Hello 23 54
I'm using console application C#

Well the first problem is that you need to decide whether the text the user enters itself can contain spaces. For example, is the following allowed?
Hello World, it's me 08 15
In that case, String.Split will not really be helpful.
What I'd try is using a regular expression. The following may serve as a starting point:
Match m = Regex.Match(input, #"^(?<text>.+) (?<num1>(\+|\-)?\d+) (?<num2>(\+|\-)?\d+)$");
if (m.Success)
{
string stringValue = m.Groups["text"].Value;
int num1 = Convert.ToInt32(m.Groups["num1"].Value);
int num2 = Convert.ToInt32(m.Groups["num2"].Value);
}
BTW: The following part of your question makes me frown:
I thought of doing it with String.Split Method but that only works if all the values have the same datatype.
A string is always just a string. Whether it contains a text, your email-address or your bank account balance. It is always just a series of characters. The notion that the string contains a number is just your interpretation!
So from a program's point of view, the string you gave is a series of characters. And for splitting that it doesn't matter at all what the real semantics of the content are.
That's why the splitting part is separate from the conversion part. You need to tell your application that that the first part is a string, the second and third parts however are supposed to be numbers. That's what you need type conversions for.

You are confusing things. A string is either null, empty or contains a sequence of characters. It never contains other data types. However, it might contain parts that could be interpreted as numbers, dates, colors etc... (but they are still strings). "123" is not an int! It is a string containing a number.
In order to extract these pieces you need to do two things:
Split the string into several string parts.
Convert string parts that are supposed to represent whole numbers into a the int type (=System.Int32).
string input = "Abc 123 456"
string[] parts = input.Split(); //Whitespaces are assumed as separators by default.
if (parts.Count == 3) {
Console.WriteLine("The text is \"{0}\"", parts[0]);
int n1;
if (Int32.TryParse(parts[1], out n1)) {
Console.WriteLine("The 1st number is {0}", n1);
} else {
Console.WriteLine("The second part is supposed to be a whole number.");
}
int n2;
if (Int32.TryParse(parts[2], out n2)) {
Console.WriteLine("The 2nd number is {0}", n2);
} else {
Console.WriteLine("The third part is supposed to be a whole number.");
}
} else {
Console.WriteLine("You must enter three parts separated by a space.");
}

What you have to do is get "Hello 23 54" in a string variable. Split by " " and treat them.
string value = "Hello 23 54";
var listValues = value.Split(' ').ToList();
After that you have to parse each item from listValues to your related types.
Hope it helps. ;)

Complex string compare logic

I need help with some complex (for me anyway as I not too experienced) string comparison logic. Basically, I want to validate a string to make sure it matches a format rule. I am using C#, targeting .NET 4.5.2.
I am trying to work with an API which gives me the expected format of the string this way:
1:420+4:9#### (must have “420” starting in position 1 AND have a “9” in position 4 AND have numeric digits in positions 5-8
2:Z+14:&&+20:10,11,12 (must have a “Z” in position 2 AND and alpha letters in positions 14, 15 AND have either “10”, “11”, or “12” starting in position 20
Legend:
":" = position/valuelist separator
"," = value separator
"+" = test separator
"#" = numeric digit-only wildcard
"&" = alpha letter-only wildcard
Given this, my first thought is to do a series of substrings and splits of the input string and then do compare on each section? Or, I could do a for loop and iterate through each character one by one until I hit the end of the length of the input string.
Let's assume in this case that the input string is something like "420987435744585". Using rule number one, I should get a pass on this since the first three are 420, position 4 is a 9 and the next 5-8 are numeric.
So far, I have created a method that returns a bool if I pass/fail validation. The input string is passed in. I then started to split on + or - to get all of the and or not sections and then split on comma to get the groups of rules. But this is where I am stuck. It seems like it should be easy and maybe it is but I just can't seem to wrap my head around it and I am thinking I am going to end up with a ton of arrays, foreach loops, if statements, etc... Just to validate and return true/false if the input string matches my format.
Can somebody please assist and give some guidance?
Thank you!!!!

The best way to handle these conditions would be using Regular Expressions (Regex). At first, you may find it a bit complicated, but it's worth to put time on learning it to handle all types of string patterns in a simple non-verbose way.
You can start with these tutorials :
http://www.codeproject.com/Articles/9099/The-Minute-Regex-Tutorial
http://www.tutorialspoint.com/csharp/csharp_regular_expressions.htm
And use this one as a reference :
https://msdn.microsoft.com/en-us/library/az24scfc(v=vs.110).aspx

I think the best way is a custom function, it will be faster than RegEx, and it would be a lot of manual work to convert that format to RegEx.
I've made a start at the validation function, and it's testing ok for the samples you provided.
Here is the code:
static bool CheckFormat(string formatString, string value)
{
string[] tests = formatString.Split('+');
foreach(string test in tests)
{
string[] testElement = test.Split(':');
int startPos = int.Parse(testElement[0]);
string patterns = testElement[1];
string[] patternElements = patterns.Split(',');
foreach(string patternElement in patternElements)
{
//value string not long enough, so fail.
if(startPos + patternElement.Length > value.Length)
return false;
for (int i = 0; i < patternElement.Length; i++)
{
switch(patternElement[i])
{
case '#':
if (!Char.IsNumber(value[i]))
return false;
break;
case '&':
if (!Char.IsLetter(value[i]))
return false;
break;
default:
if(patternElement[i] != value[i])
return false;
break;
}
}
}
}
return true;
}
The dotnet fiddle is here if you want to play with it: https://dotnetfiddle.net/52olLQ.
Good luck.

formatting decimals using string format

public static string PadZero(this double number, int decimalPlaces)
{
var requiredFormat = "0." + "".PadRight(decimalPlaces, '0');
var something = $"{number:requiredFormat}";
return number.IsNotZero() ? something: string.Empty;
}
This is a helper function to pad zeros to a double number, user can pass the number of zeros that is required to be padded through decimalPlaces.
Above function fails my unit tests, output received is {requiredFormat} in all test cases.
I have just replaced: var something = $"{number:0.00}"; with a generic variable requiredFormat that can handle any number of zero padding.

There are two problems with your example. The first is that the value of something is not going to produce a string that can be used to format a number. The second is that you are not using something to perform a number format by using string.format.
So first off, the statement:
var something = $"{number:requiredFormat}";
is not going to give you the result that you want, which would be a string that looks something like:
{0:0.0000}
Try changing the code to read:
var something = $"{{0:{requiredFormat}}}";
If you do Console.WriteLine(something) after that statement executes you can inspect the value of something to make sure it is what you are looking for.
After that, change this line:
return number.IsNotZero() ? something: string.Empty;
to read:
return number.IsNotZero() ? string.Format(something, number) : string.Empty;
Even with Interpolated Strings, you have to build the variable format and apply it in two separate steps.
Hope that helps.

How do I trim the "0." after I do modulo 1 on a double variable

Hello everyone as the title say I want to trim the "0." after I do modulo 1 on a double variable
Example:
double Number;
Number = Convert.ToDouble(Console.ReadLine()); //12.777
test = Number % 1; //0.777
I want my output to be: 777
only using math with no
string trims and so...
Thank you all !!
and in c# please

That is just a formatting on the ToString. Take a look at all your options here
How about
.ToString(".###");

Without using any string functions!
while(Math.Round(Number-(int)Number,1)!=1)
{
Number=Number/0.1;
if(Number-(int)Number==0)break;//To cover edge case like 0.1 or 0.9
}
NOTE: Number should be of double type!

If I take your question literally, then you do not want the decimal point either, so .ToString(".###") will not get you what you want, unless you remove the first character (which is string manipulation, and you said you don't want that either).
If you want 777 in a numeric variable (not a string), then you can multiply your result by 1000, though I don't know if you'll always have exactly 3 digits after the decimal or not.
The easiest way really is just to use string manipulation. ToString the result without any formatting, then get the substring starting after the decimal. For example:
var x = (.777d).ToString();
var result = x.SubString(x.IndexOf('.') + 1);

You are certainly looking for this:-
.ToString(".###");
As correctly pointed by Marc in comments you should have everything to be in a string, because if you output that 0.777 as it really is stored internally, you'd get 8 random bytes.
Something like this:-
var num = (.777d).ToString();
var result = num.SubString(num.IndexOf('.') + 1);

The most generic way to do this would be:
using System.Globalization;
var provider = NumberFormatInfo.InvariantInfo;
var output = test.ToString(".###", provider)
.Replace(provider.NumberDecimalSeparator, String.Empty);
You can also set the NumberDecimalSeparator on a custom NumberFormatInfo, but if you set it to empty it will throw the exception "Decimal separator cannot be the empty string."