CODEWITHSUNDEEP
c#
James Jeffery
James Jeffery

Reputation: 557

Setting Key/Value Pairs

I've created a List as a property of the class, and want to set the Key/Value pairs when defining the List. I was originally using a structure but realized it's probably not the ideal solution so I changed it to a List. The problem is I'm getting an error with the syntax.

Any ideas?

private List<KeyValuePair<String,String>> formData = new List<KeyValuePair<String, String>>[]
    {
            new KeyValuePair<String, String>("lsd",""),
            new KeyValuePair<String, String>("charset", "")
    };

Upvotes: 5

Views: 37059

Answers (6)

Steve
Steve

Reputation: 216293

Probably I'm missing something, but I would have used a Dictionary instead of
So simple....

Dictionary<string, string>formData = new Dictionary<string, string>
{
    {"lsd", "first"},
    {"charset", "second"}
};

and then use it in these ways:

foreach(KeyValuePair<string, string>k in formData)
{
    Console.WriteLine(k.Key);
    Console.WriteLine(k.Value);
}
....
if(formData.ContainsKey("lsd"))
    Console.WriteLine("lsd is already in");
....    
string v = formData["lsd"];
Console.WriteLine(v);

Upvotes: 13

Moha Dehghan
Moha Dehghan

Reputation: 18443

Try this:

private List<KeyValuePair<String,String>> formData = new List<KeyValuePair<String, String>>
{
    new KeyValuePair<String, String>("lsd",""),
    new KeyValuePair<String, String>("charset", "")
};

You had an extra [] in your definition. You are not creating an array, so you don't need it. Also when initializing list with some values, the values should be separated by a comma (,).

In my opinion, a better approach would be to use Tuple class:

pirvate List<Tuple<string, string>> formData = new List<Tuple<string, string>>()
{
    new Tuple<string, string>("lsd",""),
    new Tuple<string, string>("charset", "")
};

Upvotes: 3

Bj&#246;rn M&#229;rtensson
Bj&#246;rn M&#229;rtensson

Reputation: 709

try

           private List<KeyValuePair<String, String>> formData = new List<KeyValuePair<String, String>>
    {
            new KeyValuePair<String, String>("lsd",""),
            new KeyValuePair<String, String>("charset", "")
    };

Upvotes: 0

MarcinJuraszek
MarcinJuraszek

Reputation: 125630

private List<KeyValuePair<String,String>> formData = new List<KeyValuePair<String, String>>()
    {
            new KeyValuePair<String, String>("lsd",""),
            new KeyValuePair<String, String>("charset", "")
    };
  1. Why [] after the constructor?
  2. Items within collection initializer has to be separated using comma: ,.

Upvotes: 0

CloudyMarble
CloudyMarble

Reputation: 37566

remove the [] from the declaration

Upvotes: 0

Colin Mackay
Colin Mackay

Reputation: 19175

Change the semi-colon to a comma on the third line and remove the square brackets from the first line.

private List<KeyValuePair<String,String>> formData = new List<KeyValuePair<String, String>>
{
        new KeyValuePair<String, String>("lsd",""),
        new KeyValuePair<String, String>("charset", "")
};

Incidentally, if you change it to a Dictionary you get the ability to look up the values by their key more easily.

Upvotes: 0

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