如何创建JSON文件？C#生成eway bill上传JSON文件故障求助

Hey there! I totally get how frustrating this is—you’ve got a working sample JSON from the e-way bill portal, but your C#-generated version just won’t play nice when uploading. Let’s zero in on the key details needed to diagnose the issue:

What You’ll Need to Share #

• Your C# serialization code: Post the relevant parts—like your model classes (the ones you’re serializing to JSON) and the code that converts them to a JSON string. For example, if you’re using Newtonsoft.Json or System.Text.Json, include the settings you’re using too.
• Generated vs. working JSON: Share the JSON output your program creates (redact any sensitive data like GSTINs, invoice numbers, or personal info first!). Compare it line-by-line with the working sample from the portal—look for small discrepancies like:
  • Missing mandatory fields
  • Incorrect casing (e.g., PascalCase InvoiceNumber vs. camelCase invoiceNumber which the API expects)
  • Wrong data types (e.g., a numeric value stored as a string, or a date in MM/DD/YYYY instead of the required DD/MM/YYYY format)
  • Extra fields that the API doesn’t accept
• Error feedback from the portal: Any error messages, error codes, or even generic "invalid format" alerts you get when uploading. These can often point directly to the root issue (like a missing TransporterID or invalid date format).

Common Pitfalls to Check In the Meantime #

• Serialization settings: If using Newtonsoft.Json, ensure you’re using a camel case resolver if the sample uses camelCase:

  var settings = new JsonSerializerSettings
  {
      ContractResolver = new CamelCasePropertyNamesContractResolver(),
      Formatting = Formatting.Indented
  };
  string json = JsonConvert.SerializeObject(yourEwayBillModel, settings);
  

  For System.Text.Json, use similar settings:

  var options = new JsonSerializerOptions
  {
      PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
      WriteIndented = true
  };
  string json = JsonSerializer.Serialize(yourEwayBillModel, options);
  

• Mandatory field validation: Double-check that all fields marked as required in the portal’s documentation are present and have valid values. For example, InvoiceDate might need to be in a specific ISO format, or TotalValue must be a positive numeric value.
• Null values: Some APIs reject fields with null values—if the sample doesn’t include a field when it’s empty, make sure your serialization code omits nulls (use NullValueHandling.Ignore in Newtonsoft.Json or DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull in System.Text.Json).

Once you share those details, we can pinpoint exactly where the mismatch is happening!

内容的提问来源于stack exchange，提问作者Muhammed Ismail