From Dictionary to List

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This is Dictionary.

C#

Dictionary<string, List<string>> Dic = new Dictionary<string, List<string>>();

I want to do so - i clicking button and the first Dic key with her values copied to List<string>. Click again - next Dic Key and her values and etc..

Posted 6-Sep-12 20:36pm

Radzhab

Updated 6-Sep-12 20:37pm

v2

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lukeer 7-Sep-12 3:18am

Problem with this is: There is no "first" element in a dictionary.

There are elements and you can distinguish them from one another by their Key. So you would first have to provide a method of sorting, I guess.

2 solutions

Solution 1

Do as per below

for framework 2.0

foreach ( var item in dicNumber)  {     
  listnumber.Add (item.Key);   
}

using LINQ

var Listname= dictionary.Keys.ToList();

check if tis solve your problem ,thanks

Posted 6-Sep-12 21:05pm

Rickin Kane

Comments

[no name] 7-Sep-12 3:09am

I want to copy only happened when you press the button. In your case, all the data will be copied.

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lukeer · Accepted Answer · 2012-09-06T21:11:00

I have an idea how to get them all at once:

C#

public static void Example()
{
    Dictionary<string, List<string>> dic = new Dictionary<string, List<string>>();
    dic.Add(
        "first",
        new List<string>(new string[] { "first first", "second first" })
    );
    dic.Add(
        "second",
        new List<string>(new string[] {
            "first second", "second second", "third second"
        })
    );

    List<string> output = new List<string>();

    foreach (string key in dic.Keys)
    {
        output.AddRange(dic[key]);
    }
}

For a one-by-one solution, you would need to specify for each button click, which key you meant. Try a System.Windows.Forms.ListBox for that.

However, the resulting list will contain keys and values alongside. Unless the keys are formatted in some special way, you won't be able to distinguish one from another anymore.