How to deselarize a json string in C#?

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How to deselarize a json string in c#.
i am taking the values for the respective json elements and getting exception below:

Invalid object passed in, ':' or '}' expected json serialize c#

What I have tried:

Building Json Code as below:

 string json = @"  
   [
    {
       
        {                                         
        ""bankId"": """ + hsk.bankid + @""",
        ""password"": """ + hsk.password + @"""                                         
        } 

     
 }
]
";

Output

   [
    {
       
        {                                         
        "bankId": "011",
        "password": "test123"                                         
        } 

     
 }
]

Deserializing as below:
<pre>   HandShakeRequest resultT = new JavaScriptSerializer().Deserialize<HandShakeRequest>(json);

Posted 17-Jun-18 21:35pm

ranio

Updated 18-Jun-18 15:11pm

v3

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OriginalGriff · Answer 1 · 2018-06-17T22:11:00

Try removing one set of curly brackets:

[{"bankId":"011","password":"test123"}]

But ... plain text passwords? Not a good idea ... Code Crime 1[^]
Never store passwords in clear text - it is a major security risk. There is some information on how to do it here: Password Storage: How to do it.[^]

CPallini · Answer 2 · 2018-06-17T22:15:00

Quote:
[
{

{
"bankId": "011",
"password": "test123"
}

}
]

That is an invalid JSON string. You may check it using, for instance JSONLint[^]. See also JSON Objects at w3schools[^].

Vincent Maverick Durano · Answer 3 · 2018-06-18T15:12:00

As they already metioned, your JSON string is invalid that's why you are getting an error. To prevent invalid JSON string format, you could write an extension method or a static method to check of validity. For example:

C#

public static bool IsValidJson(string strInput)
        {
            strInput = strInput.Trim();
            if ((strInput.StartsWith("{") && strInput.EndsWith("}")) || //For object
                (strInput.StartsWith("[") && strInput.EndsWith("]"))) //For array
            {
                try
                {
                    var obj = JToken.Parse(strInput);
                    return true;
                }
                catch (JsonReaderException jex)
                {
                    //Exception in parsing json
                    //jex.Message;
                    return false;
                }
                catch (Exception ex) //some other exception
                {
                    //ex.ToString()
                    return false;
                }
            }
            else
            {
                return false;
            }
        }

You can then do:

C#

var isValid = IsValidJson(jsonString);

if(isValid){
   //deserialize here
}

Also keep note of the security risk as stated by OriginalGriff.

How to deselarize a json string in C#?

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