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asp.net c# read lines of text file and put each row in mutliple variables variables not updated

Posted on 2016-09-30
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Last Modified: 2016-09-30
About this code you helped me here:

List<string> contents = File.ReadAllLines(@"C:\Working Directory\test.txt").ToList();
Dictionary<string, string> vars = new Dictionary<string, string>();
foreach( string line in contents ) {
    string[] parts = line.Split(new char[] {'='}, StringSplitOptions.RemoveEmptyEntries);
    string key = parts[0].Substring(4).Trim();
    string value = parts[1].Replace("'", "").Trim();
    vars.Add ( key, value );
}

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To read each line and gives the var the value in a string variable of similar items like:

var p1='Question 1'
var a1a='Answer1 1'
var a1b='Answer1 2'
var a1c='Answer1 3'
var a1d='Answer1 4'
var e1a='Incorrect'
var e1b='Incorrect'
var e1c='Incorrect'
var e1d='Correct'

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I tested and after your "vars.Add(key, value);" I added for example one supposed created variable respe1.Text = e1d; and e11d does not have any value but if I check "key" and "value" both have values. Then how could you update the key and value to obtain the key the value like a variable? In other words like example make something like e1d="Correct" if entered manually.  Maybe after vars.Add requires an update or something?
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Question by:Alex E.
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3 Comments
 
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Accepted Solution

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Fernando Soto earned 500 total points
ID: 41823943
Hi Alex;

As stated in the last thread you can not add variables on the fly they need to be known at compile time. I said that a Dictionary can be use but it can not be used as an standard variable. A Dictionary needs to have a unique key just like a variable must be unique in the scope it is defined in. Therefore to modify a value you need to check to see if the key exist if it does then you can modify it if it does not exist then you would need to add the new key and value. The following code snippet will show how to do this.
// First check to see if the key exist or not
if( vars.ContainsKey( "e10d" ) ) {
    // The key exist and so we can change its value
    vars["e10d"] = "New Value";
} else {
    // The key does not exist so we need to add the key and value
    vars.Add ( "e10d", "The New Value" );
}

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Author Closing Comment

by:Alex E.
ID: 41824242
Worked. Thank you
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LVL 62

Expert Comment

by:Fernando Soto
ID: 41824256
Not a problem Alex, glad to help.
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