Visual Basic状态税计算器

Question

Im working on a visual basic project creating a tax calculator. Right now, i have two arrays, one for the states and one for the tax rates. States starting with AL have the same tax rate of 2%, MP 3.5%, and RW 4%. Right now this is what the two arrays look like:

 Dim states() As String = {"Alabama", "Alaska", "Arizona", "Arkansas", 
   "California", "Colorado", "Connecticut", "Delaware", "Florida", 
    "Georgia", "Hawaii", "Idaho", "Illinois", "Indiana", "Iowa", "Kansas", 
    "Kentucky", "Louisiana", "Maine", "Maryland", "Massachusetts", 
    "Michigan", "Minnesota", "Mississippi", "Missouri", "Montana", 
    "Nebraska", "Nevada", "New Hampshire", "New Jersey", "New Mexico", "New 
    York", "North Carolina", "North Dakota", "Ohio", "Oklahoma", "Oregon", 
    "Pennsylvania", "Rhode Island", "South Carolina", "South Dakota", 
    "Tennessee", "Texas", "Utah", "Vermont", "Virginia", "Washington", 
    "West Virginia", "Wisconsin", "Wyoming"} 

    Dim statetax() As Double = {0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 
    0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.02, 0.035, 
    0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 
    0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 0.035, 
    0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04, 0.04}

Then, to calculate the state tax I have a bunch of If selectstate starts with "a" "b" "c" or "d" then totalstatetax = statetax(0) * income

I was wondering if there was a simplified version, or a way or creating an index that would allow the states and state tax to coincide. any help is appreciated. thanks!

Answer 1

Dictionary could be right tool for the job

var stateTaxes = new Dictionary<string, decimal>
{
    { "Alabama", 0.02m },
    { "Maine", 0.035m },
    // other states
}

var alabamaTaxAmount = income * stateTaxes["Alabama"];