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How Can I Efficiently Verify JSON String Validity Using JSON.NET or System.Json?
How Can I Efficiently Verify JSON String Validity Using JSON.NET or System.Json?
Jan 10, 2025 pm 09:57 PM
Efficient way to ensure the validity of JSON strings: JSON.NET and System.Json
In data processing, it is crucial to verify that the original string is valid JSON. Both JSON.NET and System.Json provide reliable solutions.
Code implementation:
The most reliable way is to use JSON.NET's JToken.Parse method and nest it within a try-catch block. This allows parsing the string and catching any exceptions indicating the JSON is invalid.
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
private static bool IsValidJson(string strInput)
{
if (string.IsNullOrWhiteSpace(strInput)) { return false; }
strInput = strInput.Trim();
if ((strInput.StartsWith("{") && strInput.EndsWith("}")) || // 對象
(strInput.StartsWith("[") && strInput.EndsWith("]"))) // 數(shù)組
{
try
{
var obj = JToken.Parse(strInput);
return true;
}
catch (JsonReaderException jex)
{
// 解析異常
Console.WriteLine(jex.Message);
return false;
}
catch (Exception ex)
{
// 其他異常
Console.WriteLine(ex.ToString());
return false;
}
}
else
{
return false;
}
}
The namespace of System.Json.NET Framework 4.5 also provides the JsonValue.Parse method:
using System.Runtime.Serialization.Json;
string jsonString = "someString";
try
{
var tmpObj = JsonValue.Parse(jsonString);
}
catch (FormatException fex)
{
// 無效的JSON格式
Console.WriteLine(fex);
}
catch (Exception ex)
{
// 其他異常
Console.WriteLine(ex.ToString());
}
No code required:
For smaller JSON strings, you can use online tools such as JSONLint and JSON2CSharp to verify their validity and generate template classes for deserialization.
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