how to fetch data from nested Dictionary in c#
I need to fetch data from nested Dictionary IN C#. My Dictionary is like this:
static Dictionary<string, Dictionary<ulong, string>> allOffset =
new Dictionary<string, Dictionary<ulong, string>>();
I need to fetch all keys/values开发者_Python百科 of the full dictionary, represented like so:
string->>ulong, string
Thanks in advance.
A LINQ answer (that reads all the triples):
var qry = from outer in allOffset
from inner in outer.Value
select new {OuterKey = outer.Key,InnerKey = inner.Key,inner.Value};
or (to get the string directly):
var qry = from outer in allOffset
from inner in outer.Value
select outer.Key + "->>" + inner.Key + ", " + inner.Value;
foreach(string s in qry) { // show them
Console.WriteLine(s);
}
Or One line solution
allOffset.SelectMany(n => n.Value.Select(o => n.Key+"->>"+o.Key+","+ o.Value))
.ToList()
.ForEach(Console.WriteLine);
Iterate over the outer dictionary, each time iterating members of the nested dictionary, i.e.
(Untested code)
foreach(var key1 in dc.Keys)
{
Console.WriteLine(key1);
var value1 = dc[key1];
foreach(var key2 in value1.Keys)
{
Console.WriteLine(" {0}, {1}", key2, value1[key2]);
}
}
What about this, the method will enumerate through all dictionary items...
public static IEnumerable<KeyValuePair<ulong, string>> GetValues()
{
foreach (var pair in allOffset.Values)
{
foreach (var value in pair)
{
yield return value;
}
}
}
try:
string s = dict["key"][_float_];
For getting whole lists you can use nested foreach loops:
StringBuilder sb=new StringBuilder();
foreach (var v in dict)
{
sb.Append(v.Key+"=>>");
foreach (var i in v.Value)
{
sb.Append(i.Key + ", " + i.Value);
}
sb.Append(Environment.NewLine);
}
Console.WriteLine(sb);
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