C#中如何生成含数组值而非序列化字符串的嵌套JSON

问题核心是你错误地对子数组做了两次序列化：先把paymentList序列化为字符串存入rowData，然后对整个rowData序列化时，这个字符串会被再次转义，导致payment_for变成带转义符的字符串而非数组。

修改步骤： #

1. 将rowData的类型从Dictionary<string, string>改为Dictionary<string, object>，使其能够存储数组等非字符串类型的数据。
2. 直接将paymentList赋值给rowData["payment_for"]，取消提前序列化的操作。

修改后的完整代码： #

private List<string[]> gridDataList = new List<string[]>();

private void BindGridView()
{
    string ss = cb_DOCUMENT_NO.SelectedValue;
    List<Dictionary<string, string>> MainList = new List<Dictionary<string, string>>();

    // 改为Dictionary<string, object>以支持存储数组类型
    Dictionary<string, object> rowData = new Dictionary<string, object>();
    rowData["User_id"] = user_id;
    rowData["Region_Id"] = txt_REGION_ID.Text;
    rowData["document_no"] = ss;
    rowData["industry_name"] = cb_INDUSTRY_NAME.SelectedValue;
    rowData["customer_number"] = cb_INDUSTRY_NAME.SelectedValue;
    rowData["posting_date"] = txt_POSTING_DATE.Text;

    List<Dictionary<string, string>> paymentList = new List<Dictionary<string, string>>();

    foreach (GridViewRow row in biGridView.Rows)
    {
        Dictionary<string, string> paymentData = new Dictionary<string, string>();
        for (int i = 0; i < row.Cells.Count; i++)
        {
            string headerText = biGridView.HeaderRow.Cells[i].Text.Trim();
            string cellText = row.Cells[i].Text.Trim();

            if (cellText == "&nbsp;")
            {
                cellText = string.Empty;
            }

            paymentData[headerText] = cellText.Trim();
        }

        paymentList.Add(paymentData);
    }

    // 直接赋值数组，不再提前序列化
    rowData["payment_for"] = paymentList;
    string jsonData = JsonConvert.SerializeObject(rowData, Formatting.Indented);

    Response.Write("<pre>" + jsonData + "</pre>");
    PostJsonDataInLaravelApp(jsonData);
}

修改后输出： #

{
  "User_id": "EAUSER02",
  "Region_Id": "ID-02",
  "document_no": "02-80/81-BIN-00259",
  "industry_name": "02-CNO-0001",
  "customer_number": "02-CNO-0001",
  "posting_date": "03-05-2080",
  "payment_for": [
    {
      "BillType": "गोदाम भवन बहाल",
      "Description": "गोदाम भवन बहाल",
      "Amount": "1000.00",
      " ": ""
    }
  ]
}

内容的提问来源于stack exchange，提问作者Salaj Subedi