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How to convert a string to decimal with 2 decimal places?

I'm trying to convert a string to a decimal but have the last two values be the decimal point. Example: "001150" be converted into 11.50.
Everything I've found in my search will convert strings to a decimal but the string already has the decimal point. I might have to create a function that will make the decimal point out of the string but wanted to see if there are any other ideas first.

string input = "001150";
string convertedString = string.Format(
"{0:N2}",
double.Parse(input)/100.0
);

First check if string is a number, then divide by 100 and then format string:
public string ConvertTwoDecimals(string toConvert)
{
Double convertedValue;
var isNumber = Double.TryParse(toConvert, out convertedValue);
return isNumber ? $"{(convertedValue / 100):N2}" : $"{ 0:N2}";
}
if you need a decimal type without formatted:
public decimal ConvertToDecimal(string toConvert)
{
Decimal convertedValue;
var isNumber = Decimal.TryParse(toConvert, out convertedValue);
return isNumber ? convertedValue/100 : 0;
}

How remove decimal part from string?

how to trim decimal part in given string of a decimal value in C#. im getting 20472.060 desired o/p - 20472
decimal totalamountWithTaxes = pri + result1 + result2 ;
string totalAmountPlusTaxes = totalamountWithTaxes.ToString();

You can simply do it like this:
int number = (int) totalAmountPlusTaxes;
or
string totalAmountPlusTaxes = String.Format("{0:C0}",totalamountWithTaxes);

Int32 Amount = Convert.ToInt32(totalamountWithTaxes.ToString().Substring(0,totalamountWithTaxes.ToString().IndexOf(".")));

Yes the above example is right and also I recommend you to visit:
String.Format Method-MSDN

Convert from string to int in c# Using Convert.ToInt32

I have a simple code in c# that converts a string into int
int i = Convert.ToInt32(aTestRecord.aMecProp);
aTestRecord.aMecProp is of string. The test I am running, during that it has values of 1.15 in string.
but above line throws error saying that input string wasn't in a format!
I don't understand why?
I am using VS 2008 c#

An integer can only represent strings without a decimal part.
1.15 contains a decimal part of 0.15.
You have to convert it into a float to keep the decimal part and correctly parse it:
float f = Convert.ToSingle(aTestRecord.aMecProp);

That is because 1.xx is not a integer valid value. You could truncate before converting to Int32, for sample:
int result = (int)(Math.Truncate(double.Parse(aTestRecord.aMecProp)* value) / 100);

if you are trying to validate that a string is an integer, use TryParse()
int i;
if (int.TryParse(aTestRecord.aMecProp, out i))
{
}
i will get assigned if TryParse() is successful

Try this:
double i = Convert.ToDouble(aTestRecord.aMecProp);
Or if you want the integer part:
int i = (int) Convert.Double(aTestRecord.aMecProp);

You can convert to double and then typecast it
string str = "1.15";
int val = (int)Convert.ToDouble(str);

Just try this,
Int32 result =0;
Int32.TryParse(aTestRecord.aMecProp, out result);

Do you need a C# equivalent for the JavaScript parseInt function? I have used this one on occasion:
public int? ParseInt(string value)
{
// Match any digits at the beginning of the string with an optional
// character for the sign value.
var match = Regex.Match(value, #"^-?\d+");
if(match.Success)
return Convert.ToInt32(match.Value);
else
return null; // Because C# does not have NaN
}
...
var int1 = ParseInt("1.15"); // returns 1
var int2 = ParseInt("123abc456"); // returns 123
var int3 = ParseInt("abc"); // returns null
var int4 = ParseInt("123"); // returns 123
var int5 = ParseInt("-1.15"); // returns -1
var int6 = ParseInt("abc123"); // returns null

ok I think this is
float d = Convert.ToSingle(aTestRecord.aMecProp);

How to use Substring , to return an integer of all the values after the first char

I have an string AssetNumber that have the following format C100200.
so i need to do the folloiwng:-
Get all the characters after the first (e.g. 100200 using above example)
Convert the substring to integer
Return the integer + 1
but I do not know how to use the sub-string to get all the characters after the first char, and how to convert string into int? Any help on this will be appreciated.

var result = Int32.Parse("C100200".Substring(1)) + 1;
If you would like to have default value, if you can't parse current string:
int result;
if (!Int32.TryParse("sdfsdf".Substring(1), out result)) {
result = 42;
}
result+=1;

"value was not in a correct format" error when converting a string to an int32

this is my code;
string a="11.4";
int b,c;
b=2;
c= convert.toint32(a) * b
I get this error;
Input string was not in a correct format
how can i convert "a"?

Well a is just not an integer value - you could use Convert.ToDouble() instead. To guard against parsing errors in case that is a possibility use double.TryParse() instead:
string a = "11.4";
double d;
if (double.TryParse(a, out d))
{
//d now contains the double value
}
Edit:
Taking the comments into account, of course it is always best to specify the culture settings. Here an example using culture-indepenent settings with double.TryParse() which would result in 11.4 as result:
if (double.TryParse(a, NumberStyles.Number, CultureInfo.InvariantCulture, out d))
{
//d now contains the double value
}

A very first glance, the number literal "11.4" is not a actual "int". Try some other converting format, such as ToDouble()
I have tried following code in C# for your reference.
string a = "11.4";
double num_a = Convert.ToDouble(a);
int b = 2;
double ans = num_a * b;