How can I cast dictionary<string, object> in keyvaluepair<string, object>

Question

0.00/5 (No votes)

See more:

I have the method to Deserialize my json to Dictionary<string,object> but I am having trouble when my json is an object to turn that into Dictionary<string,object>.

I am getting an error on my second foreach loop
Error: cannot implicitly convert type 'system.collections.generic.dictionary<string, object=""> to 'system.collections.generic.keyvaluepair<string, object="">

//Here is the method

C#

public static Dictionary<string, object> DeserializeToDictionary(string jsonString, bool isArray = false)
       {
           if (!isArray)
               isArray = jsonString.Substring(0, 1) == "[";

           if (!isArray)
           {
               var responseJson = JsonConvert.DeserializeObject<Dictionary<string, object>>(jsonString);
               var copyOfResponseJson = new Dictionary<string, object>();
               foreach (KeyValuePair<string, object> myDictionary in responseJson)
               {
                   if (myDictionary.Value is JObject)
                       copyOfResponseJson.Add(myDictionary.Key, DeserializeToDictionary(myDictionary.Value.ToString()));
                   else if (myDictionary.Value is JArray)
                       copyOfResponseJson.Add(myDictionary.Key, DeserializeToDictionary(myDictionary.Value.ToString(), true));
                   else
                       copyOfResponseJson.Add(myDictionary.Key, myDictionary.Value);
               }
               return copyOfResponseJson;
           }
           else
           {
              var resposneJson1 = JsonConvert.DeserializeObject<List<Dictionary<string, object>>>(jsonString);
               var copyOfResponseJson2 = new Dictionary<string, object>();
               foreach(KeyValuePair<string, object> myDictionary in resposneJson1)
               {
                   if (myDictionary.Value is JObject)
                       copyOfResponseJson2.Add(myDictionary.Key, DeserializeToDictionary(myDictionary.Value.ToString()));
                   else if (myDictionary.Value is JArray)
                       copyOfResponseJson2.Add(myDictionary.Key, DeserializeToDictionary(myDictionary.Value.ToString(), true));
                   else
                       copyOfResponseJson2.Add(myDictionary.Key, myDictionary.Value);
               }
               return copyOfResponseJson2;

           }

//Updating the Question with one of the Json I am trying the Deserialize

{
	"groups": null,
	"data": [{
			"type": 123,
			"name": "Name123"
		},
		{
			"type": 567,
			"name": "SecondName"

		}
	],
	"total": 2

}

What I have tried:

I am not sure how to fix this error... Any help would be really great.

Posted 4-Aug-20 22:31pm

Member 14779968

Updated 5-Aug-20 8:55am

Patrice T

v3

Add a Solution

Comments

Garth J Lancaster 5-Aug-20 5:24am

No sure exactly where you mean the error is coming from - can you perhaps use Improve question and add a comment in bold to show where the error occurs .. maybe also you could show us some of the Json or a mocked up version just so people can see what you're deserialising

Member 14779968 5-Aug-20 13:57pm

Hello Garth thank you for your response.. I had updated the question and added the json I was working with..

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Answer 1 · 2020-08-04T23:58:00

Quote:

C#

var resposneJson1 = JsonConvert.DeserializeObject<List<Dictionary<string, object>>>(jsonString);
foreach (KeyValuePair<string, object> myDictionary in resposneJson1)

Your responseJson1 variable is a List<Dictionary<string, object>>.

Each item within the list is a Dictionary<string, object>.

You are trying to cast each item from the list to a KeyValuePair<string, object>, which cannot possibly work. There is no way to represent the entire dictionary as a single KeyValuePair.

How you fix it will depend on the source JSON you're trying to deserialize, which you haven't shown.

Gerry Schmitz · Answer 2 · 2020-08-05T08:12:00

Deserialize to a .NET class (e.g. Rootobject), and go from there. These are your classes:

C#

public class Rootobject {
   public object groups { get; set; }
   public Datum[] data { get; set; }
   public int total { get; set; }
}

public class Datum {
   public int type { get; set; }
   public string name { get; set; }
}

OriginalGriff · Answer 3 · 2020-08-04T23:56:00

The problem is your foreach:

C#

var resposneJson1 = JsonConvert.DeserializeObject<List<Dictionary<string, object>>>(jsonString);
            var copyOfResponseJson2 = new Dictionary<string, object>();
            foreach (KeyValuePair<string, object> myDictionary in resposneJson1)

You are specifically saying that myDictionary is a KeyValuePair<string, object> but resposneJson1 is a List<Dictionary<string, object>> which means that each item the iterator returns is a Dictionary<string, object> rather than a KeyValuePair
Probably, you want to change it to

C#

foreach (Dictionary<string, object> myDictionary in resposneJson1)

But then you'll need to sort out the loop body to match.

How can I cast dictionary<string, object> in keyvaluepair<string, object>

3 solutions

Solution 2

Solution 3

Solution 1

Add your solution here

Preview 0