Error reading JSON data source

[afr751116]

Hello, I have a reference
https://www.fast-report.com/en/blog/show/connecting-JSON-database/
《How to create the connection to JSON database from the application code》
However, there is an error in the actual operation and the data source cannot be registered. Is there a more detailed example?
Code:

` WebReport entity = new WebReport();
Report report = new Report();

        report.Load("wwwroot/FastReport/" + reportName + ".frx"); 
        RegisteredObjects.AddConnection(typeof(JsonDataConnection));
        JsonDataConnection conn = new JsonDataConnection();
        conn.ConnectionString = $"Json={itemPath}.json";
        conn.CreateAllTables();
        report.RegisterData(conn.DataSet);
        report.Dictionary.Connections.Add(conn);
      
        report.Prepare();
        entity.Report = report;

        entity.Mode = WebReportMode.Designer; 
        entity.DesignerLocale = "zh"; 
        entity.DesignerPath = "index.html"; 
        entity.DesignerSaveCallBack = "SaveDesignedReport"; 
        entity.Debug = true;
        entity.Width = "100%";
        entity.Height = "100%";`

Json:
{"Id":"1101","Department":"13.10","Name":"张三","MobileOne":"11111111111","MobileTwo":"11111111111","Phone":"11111111111","Email":"11111111111@qq.com","PositionType":"1101","Birthday":"2021-08-01T10:18:25.557","SexType":0,"Address":null,"IdentityCard":null,"EntryTime":"2021-08-02T10:18:30.417","IDCard":"67564333","IsJobType":1}

In the end < dictionary / > there is no data. What went wrong?

[Detrav]

I made an example, a little rough. https://github.com/Detrav/fros-json-demo