How to convert nested foreach loop into LINQ query in C# and i want to return list after querying the result. List will return vale and description. below code is working fine but i need to convert these 2 foreach loops into a single LINQ query.
List<ListItem> listCodes = new List<ListItem>();
foreach (var staticValueGroupMember in staticValueGroupMembers)
{
string description = string.Empty;
if (staticValueGroupMember != null)
{
foreach (var staticValue in staticValues)
{
if (staticValue.Value == staticValueGroupMember.MemberCode.ToString())
{
description = staticValue.Description;
break;
}
}
listCodes.Add(new ListItem() { Value = staticValueGroupMember.MemberCode.ToString(), Description = description });
}
}
return listCodes;
This is pretty much a direct translation.
List<ListItem> listCodes =
(
from staticValueGroupMember in staticValueGroupMembers
where staticValueGroupMember != null
join staticValue in staticValues
on staticValueGroupMember.MemberCode.ToString() equals staticValue.Value
select new ListItem()
{
Value = staticValueGroupMember.MemberCode.ToString(),
Description = staticValue.Description
}
).ToList();
Try the code below:
var result = staticValueGroupMembers
.Where(gm => gm != null)
.Join(staticValues,
outer => outer.MemberCode.ToString(),
inner => inner.Value,
(outer, inner) => new ListItem()
{
Value = outer.MemberCode.ToString(),
Description = inner.Description
})
.ToList();
Here is the detail of the Join method.
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