Question

我遇到了将JSON转换为强类型类的错误。

我的JSON：{"listBoxID":"ctl00_ctl00_MainContentRoot_MainContent_lstBxSettings","sourceItemText":"Horizontal Bar","sourceItemValue":"Horizontal"}

DroppedItem droppedItem = JsonConvert.DeserializeObject<DroppedItem>(json);

/// <summary>
/// Outlines an object which is useful in simplifying how a CormantRadDock is created.
/// Instead of passing in lots of parameters, would rather just pass in an object that the
/// CormantRadDock knows how to interpret.
/// </summary>
[DataContract]
public class DroppedItem
{
    private static readonly ILog Logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

    [DataMember(Name = "sourceItemText")]
    public string Text { get; set; }

    [DataMember(Name = "sourceItemValue")]
    public string Value { get; set; }

    [DataMember(Name = "listBoxID")]
    public Reports ReportType { get; set; }

    public DroppedItem() { }

    public DroppedItem(string text, string value, string listBoxID)
    {
        Logger.DebugFormat("Text: {0}, Value: {1}, slidingPaneTitle: {2}", text, value, listBoxID);
        Text = text;
        Value = value;
        ReportType = DetermineReportType(listBoxID);
    }

    private Reports DetermineReportType(string listBoxID)
    {
        if (listBoxID.Contains("lstBxHistorical"))
        {
            return Reports.HistoricalReport;
        }
        else if (listBoxID.Contains("lstBxCustom"))
        {
            return Reports.CustomReport;
        }
        else
        {
            return Reports.None;
        }
    }
}

问题在于将listBoxID转换为ReportType。

未捕获Sys.WebForms.PageRequestManagerServerErrorException：Sys.WebForms.PageRequestManagerServerErrorException：将值“ctl00_ctl00_MainContentRoot_MainContent_lstBxSettings”转换为类型'CableSolve.Web.Reports'时出错

无论if语句是找到命中还是默认为else块，都会发生这种情况。如果我不尝试传递listBoxID参数，则不会发生这种情况。

我在这里遗漏了一些东西。我的DataMember名称没有做任何事吗？我以为他们会将listBoxID映射到正确的属性。

Answer 1

改为这样：

public Reports ReportType { get; set; }


[DataMember(Name = "listBoxID")]
public string listBoxID 
{
    set
    {
         ReportType = DetermineReportType(value);
    }

}

因为基本上，您可以在没有辅助方法的情况下将string转换为Report。在反序列化

上没有调用构造函数

使用数据契约的JSON到C＃对象 - 我在这里缺少什么？

1 个答案: