I have the following dictionary:
public static Dictionary<string, string> ObterCodigo()
{
return new Dictionary<string, string>
{
{"18", "Teste"},
{"19", "Teste"},
{"02", "AAA"},
{"03", "AAA"},
{"109", "BBB"},
{"157", "BBB"},
};
}
I would like my combobox to search only for "AAA" values. Can you do it?
If I understand you, you just want to return the Keys whose value is "AAA". I would do this with LINQ, available from .NET 3.5 (if you could specify which one you use would be better).
var valores = from item in ObterCodigo()
where item.Value == "AAA"
select item.Key;
This returns only the keys. If you want to return KeyValuePair<string, string> , just select item instead of item.Key .
Another way, also with LINQ, is:
var valores = ObterCodigo()
.Where(item => item.Value == "AAA")
.Select(item => item.Key);
Note that this returns an instance of IEnumerable<string> . Depending on which ComboBox implementation you are using, you will need to enumerate it first. To do this, simply use the ToList() function in the return.
Bonus: If you can not use LINQ (either because you are using an old version of the Framework or because your boss does not let me - it has happened to me - it follows a version without it - well similar to what it would look like in Java):
Dictionary<string, string> codigos = new Dictionary<string, string>();
foreach (KeyValuePair item in ObterCodigo())
if (item.Value == "AAA")
codigos.Add(item.Key, item.Value);
You can build a separate dictionary for just that.
You can populate it as follows:
Dictionary<string, string> newDic = new Dictionary<string, string>();
Dictionary<string, string> oldDic = ObterCodigo();
foreach (string key in oldDic.Keys)
{
if (oldDic[key] == "AAA") newDic.add(key, oldDic[key]);
}
At the end of the section above, the newDic dictionary will only contain the desired items.