How to display and fetch particular value from JSON to C#?

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"dateOfBirth": "1974-06-10",
            "ethnicGroup": "",
            "historicalIDs": [],
            "homeDeployment": null,
            "iDs": [
                {
                    "id": "E6051954",
                    "type": "EPI"
                },
                {
                    "id": "51005383",
                    "type": "IDX"
                },
                {
                    "id": "51005383",
                    "type": "IDXUNPAD"
                },
                {
                    "id": "500102779",
                    "type": "CHS"
                },
                {
                    "id": "18706344",
                    "type": "STAR"
                },
                {
                    "id": "0005700581",
                    "type": "N"
                },
                {
                    "id": "0005700581",
                    "type": "D"
                },
                {
                    "id": "0050750170",
                    "type": "E"
                },
                {
                    "id": "0050501702",
                    "type": "U"
                },
                {
                    "id": "0050501702",
                    "type": "C"
                },
                {
                    "id": "0050501702",
                    "type": "K"
                },
                {
                    "id": "0050501702",
                    "type": "M"
                },
                {
                    "id": "0050501702",
                    "type": "S"
                },
                {
                    "id": "0050501702",
                    "type": "R"
                },
                {
                    "id": "     Z6287",
                    "type": "INTERNAL"
                },
                {
                    "id": "Z6287",
                    "type": "EXTERNAL"
                }
            ],
            "maritalStatus": "Single",
            "name": "Interra,Craig"

this is JSON code and I want to display id of TYPE=CHS. Always it changes the sequence so Can anyone give me the code for display id particular only for CHS.

What I have tried:

dynamic dJson3 = dJson["iDs"];
                   Log.Write("Value in djson3 " + dJson3.ToString());
                   //for(int i= 0; i < 20; i++)
                   //{
                   //    if(dJson3["type"].ToString()=="CHS")
                   //    {
                   //        if (!string.IsNullOrWhiteSpace(dJson3["id"].ToString()))
                   //        {
                   //            kv.Add("Medical Record Number", dJson3["id"].ToString());

                   //        }
                   //    }
                   //}
                   var itemsA = dJson3["iDs"];
                   foreach (var item in itemsA)
                   {
                       if (dJson3["type"].ToString() == "CHS")
                       {
                           if (!string.IsNullOrWhiteSpace(dJson3["id"].ToString()))
                           {
                               kv.Add("Medical Record Number", dJson3["id"].ToString());

                           }
                       }
                   }

I tried this two method but not getting proper answer, getting exception of like

The best overloaded method match for 'System.Collections.Generic.Dictionary<string,object>.this[string]' has some invalid arguments

or cannont convert string to int

Posted 20-Jun-22 3:18am

Suraj Ingle

Updated 20-Jun-22 3:33am

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2 solutions

Solution 1

Check out the article that I wrote: Working with JSON in C# & VB[^] ... it should have answers for you.

Posted 20-Jun-22 3:29am

Graeme_Grant

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Richard Deeming · Accepted Answer · 2022-06-20T03:33:00

Your code is very confused.

You start with an object containing a property called iDs, stored in your dJson variable.

You retrieve the iDs property value, and store it in your dJson3 variable.

C#

dynamic dJson3 = dJson["iDs"];

You then try to retrieve the value of the non-existent iDs property from the value of the iDs property, and store that in your itemsA variable.

C#

var itemsA = dJson3["iDs"]; // There is no iDs.iDs property on your object!

You then loop over the list, checking the type property on the value of the first iDs property rather than the individual list item.

C#

foreach (var item in itemsA)
{
    if (dJson3["type"].ToString() == "CHS") // dJson3 does NOT point to the item in the list!
    {
        kv.Add("Medical Record Number", dJson3["id"].ToString()); // Same problem here!

Change your code to use the correct JSON paths:

C#

dynamic dJson3 = dJson["iDs"];
foreach (var item in dJson3)
{
    if (item["type"] == "CHS")
    {
        kv.Add("Medical Record Number", item["id"].ToString());
    }
}