小编Jag*_*SWE的帖子

我有以下型号:

public class ViewDataItem
{
    public string viewName { get; set; }
    public UpdateIndicator updateIndicator { get; set; }
}

使用以下枚举:

public enum UpdateIndicator
{
    Original,
    Update,
    Delete
}

以下验证者:

public class ViewValidator : AbstractValidator<ViewDataItem>
{
    public ViewValidator()
    {
        RuleFor(x => x.viewName).NotEmpty().WithMessage("View name must be specified");
        RuleFor(x => x.updateIndicator).SetValidator(new UpdateIndicatorEnumValidator<UpdateIndicator>());
    }
}

public class UpdateIndicatorEnumValidator<T> : PropertyValidator
{
    public UpdateIndicatorEnumValidator() : base("Invalid update indicator") {}

    protected override bool IsValid(PropertyValidatorContext context)
    {
        UpdateIndicator enumVal = (UpdateIndicator)Enum.Parse(typeof(UpdateIndicator), context.PropertyValue.ToString());

        if (!Enum.IsDefined(typeof(UpdateIndicator), enumVal))
          return …

我正在尝试设置一个 SignalR 集线器，以便能够通过网络将通知推送到一堆 WPF 客户端。我尝试遵循基本指南和教程，并创建了一个 WPF SignalR 服务器（仅用于测试目的）。它已放在我局域网中的服务器上，它的外观如下：

启动文件

class Startup
{
    public void Configuration(IAppBuilder app)
    {
        HubConfiguration hc = new HubConfiguration();
        hc.EnableDetailedErrors = true;

        app.UseCors(CorsOptions.AllowAll);
        app.MapSignalR(hc);
    }
}

主窗口.xaml.cs

public IDisposable SignalR { get; set; }
const string ServerURI = "http://localhost:8554";

private void StartServer()
{
    try
    {
        SignalR = WebApp.Start(ServerURI);
    }
    catch (TargetInvocationException)
    {
        WriteToConsole("A server is already running at " + ServerURI);
        return;
    }
    this.Dispatcher.Invoke(() => btnStopHub.IsEnabled = true);
}

临时集线器

public class AdHocHub : Hub
{
    public …

我正在尝试运行一个执行hive脚本的简单工作流程.这个hive脚本只调用join(表非常大); 一旦hive脚本执行结束,我就希望看到工作流状态从RUNNING变为成功,但这不会发生.

这是工作流日志的内容:

2016-05-31 15:52:34,590 WARN 

org.apache.oozie.action.hadoop.HiveActionExecutor: 
SERVER[hadoop02] U
SER[scapp] 
GROUP[-] 
TOKEN[] 
APP[wf-sqoop-hive-agreement] 
JOB[0000001-160531143657136-oozie-oozi-W] 
ACTION[0000001-160531143657136-oozie-oozi-W@hive-query-agreement] Launcher 
ERROR, reason: Main class [org.apache.oozie.action.hadoop.HiveMain], exception invoking main(), Output data exceeds its limit [2048] 2016-05-31 15:52:34,591 

WARN org.apache.oozie.action.hadoop.HiveActionExecutor: 
SERVER[hadoop02] 
USER[scapp] 
GROUP[-] 
TOKEN[] 
APP[wf-sqoop-hive-agreement] 
JOB[0000001-160531143657136-oozie-oozi-W] 
ACTION[0000001-160531143657136-oozie-oozi-W@hive-query-agreement] 
Launcher exception: Output data exceeds its limit [2048] 
org.apache.oozie.action.hadoop.LauncherException: Output data exceeds its limit [2048]  
at org.apache.oozie.action.hadoop.LauncherMapper.getLocalFileContentStr(LauncherMapper.java:415)    
at org.apache.oozie.action.hadoop.LauncherMapper.handleActionData(LauncherMapper.java:391)  
at org.apache.oozie.action.hadoop.LauncherMapper.map(LauncherMapper.java:275) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)  
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:453)  
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)   
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)     
at java.security.AccessController.doPrivileged(Native Method)   
at javax.security.auth.Subject.doAs(Subject.java:415)   
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671)     
at …

我有一个SQL Server表,其中我有一个列,我想选择当前值并递增1,有没有办法在单个查询中执行此操作？这是为了减少其他人得到相同数字的机会,无论多么小.

这段伪代码的内容:

SELECT NumSeriesCurrent 
FROM NumSeries 
(UPDATE NumSeries SET NumSeriesCurrent = NumSeriesCurrent+1) 
WHERE NumSeriesKey='X'

我正在使用iTextSharp中的PdfStamper创建一个PDF文件,并将PDF作为内存流对象返回到调用函数,然后用于在WinForms的Teleriks PDF Viewer Component中显示PDF.

这是目标.

现在,创建PDF可以正常工作,并将数据返回给Calling函数,在Calling函数中,我应该将memorystream内容写入文件流,然后在Adobe Reader中打开它看起来很好.

但是,如果我选择在PDF查看器控件中显示PDF,我只会收到"不支持的流类型"错误.

现在,我认为PDF数据有问题所以我决定创建PDF文件,将其保存到磁盘,然后在Calling函数中将其读取到内存流,并在PDF Viewer中显示该内存流,对于我来说不明原因,作品....

我真的无法理解这一点并需要一些帮助.

所以,这将无法正常工作:

//The Calling function
private void dlgViewPDF_Load(object sender, EventArgs e)
{
    MemoryStream ms = PDFcreator.GeneratePDFdata(id);

   rPdfView.LoadDocument(ms);
}

//The PDF generator
public static MemoryStream GeneratePDFdata(string id)
{
    MemoryStream ms = new MemoryStream();

    string sTemplate = string.Concat(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "\\template.pdf");

    PdfReader pdfReader = new PdfReader(sTemplate);
    PdfStamper pdfStamper = new PdfStamper(pdfReader, ms);

    PdfContentByte cb = pdfStamper.GetOverContent(1);

    BaseFont baseFont = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1250, BaseFont.EMBEDDED);
    BaseFont baseFontBold = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.CP1250, BaseFont.EMBEDDED);
    cb.SetColorFill(iTextSharp.text.Color.BLACK);
    cb.SetFontAndSize(baseFontBold, 14);

    cb.BeginText(); …

我有一个看起来像这样的属性类

ZipStart | ZipEnd | Acode

10000    | 13999  | BEK

14000    | 14999  | ATE

现在,我有一个值,例如11332,我想查找该号码所属的Acode,为此我有以下代码:

           var res = from o in ListOfDataClass
                  where iCode >= o.ZipStart && o.ZipEnd <= iCode
                  select o;

            var c = res.FirstOrDefault();
            return c.Acode;

然而,这不时会导致null,但我还是找不到一个模式,但是由于问题出现在这个方法中,我已经能够从调试器中扣除iCode IS实际上是11332但是LINQ查询不会产生任何结果.

有任何想法吗？