dynamically define key name for which the value needs to be identified
up vote
3
down vote
favorite
I have a keyvalue pair list some thing like this
List<Subscriptions> subs = new List<Subscriptions>();
subs.Add(new Subscriptions() { Id = 1, Name = "ABC" });
subs.Add(new Subscriptions() { Id = 1, Name = "DEF" });
I can search against one key (ID or Name) but what I want to achieve is that user define which key they want to search against ID or Name
right now i am using this approach to filter the list based on Name Value
var filtered = subs.Where(sub => sub.Name.IndexOf(SearchString.Text,StringComparison.OrdinalIgnoreCase) >=0);
sub.Name is defined statically here, I want the user to choose what they want their search to be based on
for example if we have abc:Name program search for abc under Name key and if we have 1:Id then it search for 1 in ID.
This is just an example , in real scenario i can have multiple fields in my list.
I hope I am able to make myself clear.
c# list keyvaluepair
asked Nov 12 at 9:07
FizzaTahir
274
add a comment |
up vote
3
down vote
favorite
I have a keyvalue pair list some thing like this
List<Subscriptions> subs = new List<Subscriptions>();
subs.Add(new Subscriptions() { Id = 1, Name = "ABC" });
subs.Add(new Subscriptions() { Id = 1, Name = "DEF" });
I can search against one key (ID or Name) but what I want to achieve is that user define which key they want to search against ID or Name
right now i am using this approach to filter the list based on Name Value
var filtered = subs.Where(sub => sub.Name.IndexOf(SearchString.Text,StringComparison.OrdinalIgnoreCase) >=0);
sub.Name is defined statically here, I want the user to choose what they want their search to be based on
for example if we have abc:Name program search for abc under Name key and if we have 1:Id then it search for 1 in ID.
This is just an example , in real scenario i can have multiple fields in my list.
I hope I am able to make myself clear.
c# list keyvaluepair
asked Nov 12 at 9:07
FizzaTahir
274
add a comment |
up vote
3
down vote
favorite
up vote
3
down vote
favorite
I have a keyvalue pair list some thing like this
List<Subscriptions> subs = new List<Subscriptions>();
subs.Add(new Subscriptions() { Id = 1, Name = "ABC" });
subs.Add(new Subscriptions() { Id = 1, Name = "DEF" });
I can search against one key (ID or Name) but what I want to achieve is that user define which key they want to search against ID or Name
right now i am using this approach to filter the list based on Name Value
var filtered = subs.Where(sub => sub.Name.IndexOf(SearchString.Text,StringComparison.OrdinalIgnoreCase) >=0);
sub.Name is defined statically here, I want the user to choose what they want their search to be based on
for example if we have abc:Name program search for abc under Name key and if we have 1:Id then it search for 1 in ID.
This is just an example , in real scenario i can have multiple fields in my list.
I hope I am able to make myself clear.
c# list keyvaluepair
asked Nov 12 at 9:07
FizzaTahir
274
I have a keyvalue pair list some thing like this
List<Subscriptions> subs = new List<Subscriptions>();
subs.Add(new Subscriptions() { Id = 1, Name = "ABC" });
subs.Add(new Subscriptions() { Id = 1, Name = "DEF" });
I can search against one key (ID or Name) but what I want to achieve is that user define which key they want to search against ID or Name
right now i am using this approach to filter the list based on Name Value
var filtered = subs.Where(sub => sub.Name.IndexOf(SearchString.Text,StringComparison.OrdinalIgnoreCase) >=0);
sub.Name is defined statically here, I want the user to choose what they want their search to be based on
for example if we have abc:Name program search for abc under Name key and if we have 1:Id then it search for 1 in ID.
This is just an example , in real scenario i can have multiple fields in my list.
I hope I am able to make myself clear.
c# list keyvaluepair
c# list keyvaluepair
asked Nov 12 at 9:07
FizzaTahir
274
asked Nov 12 at 9:07
FizzaTahir
274
edited Nov 12 at 9:25
asked Nov 12 at 9:07
FizzaTahir
274
asked Nov 12 at 9:07
FizzaTahir
274
asked Nov 12 at 9:07
FizzaTahir
274
274
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
up vote
2
down vote
Why you don't apply the Where by an simple if else or switch
// keyword : abc:Name or 1:Id
var value = keyword.Split(':')[0];
var key = keyword.Split(':')[1];
if(key == "Name")
{
var filterred = subs.Where(sub => sub.Name == value);
}
else if(key == "Id")
var filterred = subs.Where(sub => sub.id == int.Parse(value));
}
answered Nov 12 at 9:12
Antoine V
4,9912424
this is a good approach if I only have two fields , but what if I have more than 2 field to search against ? it will be too many code lines then. I want it to be dynamic
– FizzaTahir
Nov 12 at 9:24
With a switch, you can add many fields that you want. I think you don't have other solution simpler
– Antoine V
Nov 12 at 9:27
add a comment |
up vote
2
down vote
Fast answer:
string name = "";
int? id = null;
List<Subscriptions> subs = new List<Subscriptions>();
var query = subs.AsQueryable();
if (!string.IsNullOrEmpty(name))
query = query.Where(p => p.Name == name);
if(id.HasValue)
query = query.Where(p => p.id == id.Value);
var result = query.ToArray();
Detailed answer: you can read about expression tree and IQueriable interface
basicly you can avoid to cast your list to IQueriable if you not use something like Entity Frmework od OData. But if you need to convert you LINQ expression to something more complexivity - you should use IQueriable, or build your own Expression Tree.
answered Nov 12 at 9:13
Sergey Shulik
678824
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
Why you don't apply the Where by an simple if else or switch
// keyword : abc:Name or 1:Id
var value = keyword.Split(':')[0];
var key = keyword.Split(':')[1];
if(key == "Name")
{
var filterred = subs.Where(sub => sub.Name == value);
}
else if(key == "Id")
var filterred = subs.Where(sub => sub.id == int.Parse(value));
}
answered Nov 12 at 9:12
Antoine V
4,9912424
this is a good approach if I only have two fields , but what if I have more than 2 field to search against ? it will be too many code lines then. I want it to be dynamic
– FizzaTahir
Nov 12 at 9:24
With a switch, you can add many fields that you want. I think you don't have other solution simpler
– Antoine V
Nov 12 at 9:27
add a comment |
up vote
2
down vote
Why you don't apply the Where by an simple if else or switch
// keyword : abc:Name or 1:Id
var value = keyword.Split(':')[0];
var key = keyword.Split(':')[1];
if(key == "Name")
{
var filterred = subs.Where(sub => sub.Name == value);
}
else if(key == "Id")
var filterred = subs.Where(sub => sub.id == int.Parse(value));
}
answered Nov 12 at 9:12
Antoine V
4,9912424
this is a good approach if I only have two fields , but what if I have more than 2 field to search against ? it will be too many code lines then. I want it to be dynamic
– FizzaTahir
Nov 12 at 9:24
With a switch, you can add many fields that you want. I think you don't have other solution simpler
– Antoine V
Nov 12 at 9:27
add a comment |
up vote
2
down vote
up vote
2
down vote
Why you don't apply the Where by an simple if else or switch
// keyword : abc:Name or 1:Id
var value = keyword.Split(':')[0];
var key = keyword.Split(':')[1];
if(key == "Name")
{
var filterred = subs.Where(sub => sub.Name == value);
}
else if(key == "Id")
var filterred = subs.Where(sub => sub.id == int.Parse(value));
}
answered Nov 12 at 9:12
Antoine V
4,9912424
Why you don't apply the Where by an simple if else or switch
// keyword : abc:Name or 1:Id
var value = keyword.Split(':')[0];
var key = keyword.Split(':')[1];
if(key == "Name")
{
var filterred = subs.Where(sub => sub.Name == value);
}
else if(key == "Id")
var filterred = subs.Where(sub => sub.id == int.Parse(value));
}
answered Nov 12 at 9:12
Antoine V
4,9912424
answered Nov 12 at 9:12
Antoine V
4,9912424
answered Nov 12 at 9:12
Antoine V
4,9912424
answered Nov 12 at 9:12
Antoine V
4,9912424
4,9912424
this is a good approach if I only have two fields , but what if I have more than 2 field to search against ? it will be too many code lines then. I want it to be dynamic
– FizzaTahir
Nov 12 at 9:24
With a switch, you can add many fields that you want. I think you don't have other solution simpler
– Antoine V
Nov 12 at 9:27
add a comment |
this is a good approach if I only have two fields , but what if I have more than 2 field to search against ? it will be too many code lines then. I want it to be dynamic
– FizzaTahir
Nov 12 at 9:24
With a switch, you can add many fields that you want. I think you don't have other solution simpler
– Antoine V
Nov 12 at 9:27
this is a good approach if I only have two fields , but what if I have more than 2 field to search against ? it will be too many code lines then. I want it to be dynamic
– FizzaTahir
Nov 12 at 9:24
this is a good approach if I only have two fields , but what if I have more than 2 field to search against ? it will be too many code lines then. I want it to be dynamic
– FizzaTahir
Nov 12 at 9:24
With a switch, you can add many fields that you want. I think you don't have other solution simpler
– Antoine V
Nov 12 at 9:27
With a switch, you can add many fields that you want. I think you don't have other solution simpler
– Antoine V
Nov 12 at 9:27
add a comment |
up vote
2
down vote
Fast answer:
string name = "";
int? id = null;
List<Subscriptions> subs = new List<Subscriptions>();
var query = subs.AsQueryable();
if (!string.IsNullOrEmpty(name))
query = query.Where(p => p.Name == name);
if(id.HasValue)
query = query.Where(p => p.id == id.Value);
var result = query.ToArray();
Detailed answer: you can read about expression tree and IQueriable interface
basicly you can avoid to cast your list to IQueriable if you not use something like Entity Frmework od OData. But if you need to convert you LINQ expression to something more complexivity - you should use IQueriable, or build your own Expression Tree.
answered Nov 12 at 9:13
Sergey Shulik
678824
add a comment |
up vote
2
down vote
Fast answer:
string name = "";
int? id = null;
List<Subscriptions> subs = new List<Subscriptions>();
var query = subs.AsQueryable();
if (!string.IsNullOrEmpty(name))
query = query.Where(p => p.Name == name);
if(id.HasValue)
query = query.Where(p => p.id == id.Value);
var result = query.ToArray();
Detailed answer: you can read about expression tree and IQueriable interface
basicly you can avoid to cast your list to IQueriable if you not use something like Entity Frmework od OData. But if you need to convert you LINQ expression to something more complexivity - you should use IQueriable, or build your own Expression Tree.
answered Nov 12 at 9:13
Sergey Shulik
678824
add a comment |
up vote
2
down vote
up vote
2
down vote
Fast answer:
string name = "";
int? id = null;
List<Subscriptions> subs = new List<Subscriptions>();
var query = subs.AsQueryable();
if (!string.IsNullOrEmpty(name))
query = query.Where(p => p.Name == name);
if(id.HasValue)
query = query.Where(p => p.id == id.Value);
var result = query.ToArray();
Detailed answer: you can read about expression tree and IQueriable interface
basicly you can avoid to cast your list to IQueriable if you not use something like Entity Frmework od OData. But if you need to convert you LINQ expression to something more complexivity - you should use IQueriable, or build your own Expression Tree.
answered Nov 12 at 9:13
Sergey Shulik
678824
Fast answer:
string name = "";
int? id = null;
List<Subscriptions> subs = new List<Subscriptions>();
var query = subs.AsQueryable();
if (!string.IsNullOrEmpty(name))
query = query.Where(p => p.Name == name);
if(id.HasValue)
query = query.Where(p => p.id == id.Value);
var result = query.ToArray();
Detailed answer: you can read about expression tree and IQueriable interface
basicly you can avoid to cast your list to IQueriable if you not use something like Entity Frmework od OData. But if you need to convert you LINQ expression to something more complexivity - you should use IQueriable, or build your own Expression Tree.
answered Nov 12 at 9:13
Sergey Shulik
678824
answered Nov 12 at 9:13
Sergey Shulik
678824
answered Nov 12 at 9:13
Sergey Shulik
678824
answered Nov 12 at 9:13
Sergey Shulik
678824
678824
add a comment |
add a comment |
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