In this tutorial, I’ll show you how you can get up and running with ElasticSearch, Kibana and ASP.NET Core 2.1

Before we get started, let’s look at what ElasticSearch, Kibana and Serilog are. 

@Directive({
  selector: "[isVisibleForAuthUser]"
})
export class IsVisibleForAuthUserDirective implements OnInit, OnDestroy {
  constructor(private elem: ElementRef, private authService: AuthService) { }

@Directive({
selector: "[hasAuthUserViewPermission]"
})
export class HasAuthUserViewPermissionDirective implements OnInit, OnDestroy {

  constructor(
  private templateRef: TemplateRef<any>,
  private viewContainer: ViewContainerRef,
  private authService: AuthService
) { }

<div *hasAuthUserViewPermission="['Admin','User']">
    *hasAuthUserViewPermission="['Admin','User']"
</div>

 this.viewContainer.createEmbeddedView(this.templateRef);

 this.viewContainer.clear();

import { Directive, Input, OnDestroy, OnInit, TemplateRef, ViewContainerRef } from "@angular/core";
import { Subscription } from "rxjs/Subscription";

import { AuthService } from "./../../core/services/auth.service";

@Directive({
  selector: "[hasAuthUserViewPermission]"
})
export class HasAuthUserViewPermissionDirective implements OnInit, OnDestroy {
  private isVisible = false;
  private requiredRoles: string[] | null = null;
  private subscription: Subscription | null = null;

  @Input()
  set hasAuthUserViewPermission(roles: string[] | null) {
    this.requiredRoles = roles;
  }

  // Note, if you don't place the * in front, you won't be able to inject the TemplateRef<any> or ViewContainerRef into your directive.
  constructor(
    private templateRef: TemplateRef<any>,
    private viewContainer: ViewContainerRef,
    private authService: AuthService
  ) { }

  ngOnInit() {
    this.subscription = this.authService.authStatus$.subscribe(status => this.changeVisibility(status));
    this.changeVisibility(this.authService.isAuthUserLoggedIn());
  }

  ngOnDestroy(): void {
    if (this.subscription) {
      this.subscription.unsubscribe();
    }
  }

  private changeVisibility(status: boolean) {
    const isInRoles = !this.requiredRoles ? true : this.authService.isAuthUserInRoles(this.requiredRoles);
    if (isInRoles && status) {
      if (!this.isVisible) {
        this.viewContainer.createEmbeddedView(this.templateRef);
        this.isVisible = true;
      }
    } else {
      this.isVisible = false;
      this.viewContainer.clear();
    }
  }
}

import { HasAuthUserViewPermissionDirective } from "./directives/has-auth-user-view-permission.directive";

@NgModule({
  declarations: [
    HasAuthUserViewPermissionDirective
  ],
  exports: [
    HasAuthUserViewPermissionDirective
  ]
})
export class SharedModule {}

import { SharedModule } from "../shared/shared.module";
@NgModule({
  imports: [
    SharedModule
  ]
})
export class DashboardModule { }

<div *hasAuthUserViewPermission="">
    *hasAuthUserViewPermission=""
</div>

<div *hasAuthUserViewPermission="['Admin','User']">
    *hasAuthUserViewPermission="['Admin','User']"
</div>

Blazor C# Tutorials
30 videos

In this playlist, I am going through all the fundamentals and sharing my journey to be a full stack Blazor developer. This is the future of web development in ASP.NET world. If you want to learn Blazor this is the best place to start.

1. Build Your First App - EP01
2. Getting Started - EP02
3. #Routing - EP03
4. Dependency #Injection - EP04
5. Forms & #Validations - EP05
6. JavaScript #Interop - EP06
7. #Razor #Components | Re-usability - EP07
8. Razor Components | #Lifecycle Methods - EP08
9. Razor Component #Libraries - EP09
10. Call #REST #API - #CRUD Methods - EP10
11. #Authentication | Out of the box- EP11
12. Custom AuthenticationStateProvider - EP12
13. Layouts | Login Pages - EP13
14.  HttpClient | Login User
15. IHttpClientFactory | Login User
16. Sending JWT token & Request Middleware
17. Handling Exceptions 

private static void repAll()
        {
            object Missing = System.Reflection.Missing.Value;

            Application app = null;
            Microsoft.Office.Interop.Word.Document doc = null;
            try
            {
                app = new Microsoft.Office.Interop.Word.Application();

                doc = app.Documents.Open(@"D:\temp\te1.docx", Missing, Missing, Missing, Missing, Missing, Missing, Missing, Missing, Missing);

                FindReplaceAnywhere(app, "@levelOrder", "محرمانه");

                doc.SaveAs(@"D:\temp\out.docx", Missing, Missing, Missing, Missing, Missing, Missing, Missing, Missing, Missing);
            }
            finally
            {
                try
                {
                    if (doc != null) ((Microsoft.Office.Interop.Word._Document)doc).Close(true, Missing, Missing);
                }
                finally { }
                if (app != null) ((Microsoft.Office.Interop.Word._Application)app).Quit(true, Missing, Missing);
            }
        }

        private static void searchAndReplaceInStory(Microsoft.Office.Interop.Word.Range rngStory, string strSearch, string strReplace)
        {
            rngStory.Find.ClearFormatting();
            rngStory.Find.Replacement.ClearFormatting();
            rngStory.Find.Text = strSearch;
            rngStory.Find.Replacement.Text = strReplace;
            rngStory.Find.Wrap = WdFindWrap.wdFindContinue;
            object Missing = System.Reflection.Missing.Value;

            object arg1 = Missing; // Find Pattern
            object arg2 = Missing; //MatchCase
            object arg3 = Missing; //MatchWholeWord
            object arg4 = Missing; //MatchWildcards
            object arg5 = Missing; //MatchSoundsLike
            object arg6 = Missing; //MatchAllWordForms
            object arg7 = Missing; //Forward
            object arg8 = Missing; //Wrap
            object arg9 = Missing; //Format
            object arg10 = Missing; //ReplaceWith
            object arg11 = WdReplace.wdReplaceAll; //Replace
            object arg12 = Missing; //MatchKashida
            object arg13 = Missing; //MatchDiacritics
            object arg14 = Missing; //MatchAlefHamza
            object arg15 = Missing; //MatchControl

            rngStory.Find.Execute(ref arg1, ref arg2, ref arg3, ref arg4, ref arg5, ref arg6, ref arg7, ref arg8, ref arg9, ref arg10, ref arg11, ref arg12, ref arg13, ref arg14, ref arg15);
        }

        // Main routine to find text and replace it,
        //   var app = new Microsoft.Office.Interop.Word.Application();
        public static void FindReplaceAnywhere(Microsoft.Office.Interop.Word.Application app, string findText, string replaceText)
        {
            // http://forums.asp.net/p/1501791/3739871.aspx
            var doc = app.ActiveDocument;

            // Fix the skipped blank Header/Footer problem
            //    http://msdn.microsoft.com/en-us/library/aa211923(office.11).aspx
            Microsoft.Office.Interop.Word.WdStoryType lngJunk = doc.Sections[1].Headers[WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.StoryType;

            // Iterate through all story types in the current document
            foreach (Microsoft.Office.Interop.Word.Range rngStory in doc.StoryRanges)
            {

                // Iterate through all linked stories
                var internalRangeStory = rngStory;

                do
                {
                    searchAndReplaceInStory(internalRangeStory, findText, replaceText);

                    try
                    {
                        //   6 , 7 , 8 , 9 , 10 , 11 -- http://msdn.microsoft.com/en-us/library/aa211923(office.11).aspx
                        switch (internalRangeStory.StoryType)
                        {
                            case Microsoft.Office.Interop.Word.WdStoryType.wdEvenPagesHeaderStory: // 6
                            case Microsoft.Office.Interop.Word.WdStoryType.wdPrimaryHeaderStory:   // 7
                            case Microsoft.Office.Interop.Word.WdStoryType.wdEvenPagesFooterStory: // 8
                            case Microsoft.Office.Interop.Word.WdStoryType.wdPrimaryFooterStory:   // 9
                            case Microsoft.Office.Interop.Word.WdStoryType.wdFirstPageHeaderStory: // 10
                            case Microsoft.Office.Interop.Word.WdStoryType.wdFirstPageFooterStory: // 11

                                if (internalRangeStory.ShapeRange.Count > 0)
                                {
                                    foreach (Microsoft.Office.Interop.Word.Shape oShp in internalRangeStory.ShapeRange)
                                    {
                                        if (oShp.TextFrame.HasText != 0)
                                        {
                                            searchAndReplaceInStory(oShp.TextFrame.TextRange, findText, replaceText);
                                        }
                                    }
                                }
                                break;

                            default:
                                break;
                        }
                    }
                    catch
                    {
                        // On Error Resume Next
                    }

                    // ON ERROR GOTO 0 -- http://www.harding.edu/fmccown/vbnet_csharp_comparison.html

                    // Get next linked story (if any)
                    internalRangeStory = internalRangeStory.NextStoryRange;
                } while (internalRangeStory != null); // http://www.harding.edu/fmccown/vbnet_csharp_comparison.html
            }

        }

public static void getFileDocxInPdf()
        {
            // Create a new Microsoft Word application object
            Microsoft.Office.Interop.Word.Application word = new Microsoft.Office.Interop.Word.Application();

            // C# doesn't have optional arguments so we'll need a dummy value
            object oMissing = System.Reflection.Missing.Value;

            // Get list of Word files in specified directory
            DirectoryInfo dirInfo = new DirectoryInfo(@"D:\temp");
            FileInfo[] wordFiles = dirInfo.GetFiles("*.docx");

            word.Visible = false;
            word.ScreenUpdating = false;

            foreach (FileInfo wordFile in wordFiles)
            {
                // Cast as Object for word Open method
                Object filename = (Object)wordFile.FullName;

                // Use the dummy value as a placeholder for optional arguments
                Microsoft.Office.Interop.Word.Document doc = word.Documents.Open(ref filename, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing);
                doc.Activate();

                object outputFileName = wordFile.FullName.Replace(".docx", ".pdf");
                object fileFormat = WdSaveFormat.wdFormatPDF;

                // Save document into PDF Format
                doc.SaveAs(ref outputFileName,
                    ref fileFormat, ref oMissing, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                    ref oMissing, ref oMissing, ref oMissing, ref oMissing);

                // Close the Word document, but leave the Word application open.
                // doc has to be cast to type _Document so that it will find the
                // correct Close method.                
                object saveChanges = WdSaveOptions.wdDoNotSaveChanges;
                ((_Document)doc).Close(ref saveChanges, ref oMissing, ref oMissing);
                doc = null;
            }

            // word has to be cast to type _Application so that it will find
            // the correct Quit method.
            ((_Application)word).Quit(ref oMissing, ref oMissing, ref oMissing);
            word = null;
        }

But what do you know, turns out JavaScript isn’t quite done changing just yet! And so after over 21,717 respondents took this year's survey we had to dig up our components and charts, curse us-from-a-year-ago for writing such crappy code, and get to work digging through the data. 

If you are working with .NET, then there are some very easy to consume libraries to help you host a WebSocket server or connect as a WebSocket client.