Log exception to file in c# .net core application explained

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In production environment when any bug gets reported at that time as developer wants to get the exception details of bug to resolve the issue on high priority.
In some case there might be situation where exception is not logged in table but developer wants to check the bug immediately. for that purpose we need to write the
exception details including stack trace of bug in file. To implement this easily i am going to demonstrate the implementation of custom logging in file as below.

First we need to construct the exception and logger method in custom logger class as shown below.


public class CustomLogger { public static List<string> ConstructExceptionDetails(Exception ex,string FunctionName) { return new List<string>() { $"{DateTime.Now} - {FunctionName}", $"Exception: {ex.Message}", $"StackTrace: {ex.StackTrace}", $"InnerException: {ex.InnerException?.…
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Email validation using regular expression in jQuery

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To validate user input for email-id it's very easy using regular expressions. Using regular expressions you do not need to write lengthy logical code in jQuery. Following are the steps to do the same.

  • Pass a string to RegExp or create a regex using the //syntax
  • Call regex.test(string)
So code would be...
jQuery(function () {
    $(".mail").keyup(function () {
        var VAL = this.value;

        var email = new RegExp('^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$');

        if (email.test(VAL)) {
            alert('Great, you entered an valid E-Mail-address');
        }
    });
});

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Restore the lost focus of Auto post back controls in asp.net update Panel control

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Problem:
We put  autopostback controls like textbox, DropDownList controls inside in update panel to reducing the flickering of the Page.but when user uses tab for entering the details  the focus of the control losts. Web site users who prefer to use keyboard need to use mouse to activate appropriate input box or press TAB multiple times.

Solution:

Step 1:

 Save following in js file give any name to it (like MyUpdatePanelFocus.js)

var lastFocusedControlId = ""; function focusHandler(e) { document.activeElement = e.originalTarget; } function appInit() { if (typeof (window.addEventListener) !== "undefined") { window.addEventListener("focus", focusHandler, true); } Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(pageLoadingHandler); Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(pageLoadedHandler); } function pageLoadingHandler(sender, args) { lastFocusedControlId = typeof (document.activeElement) ==…
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Add Comma automatically while entering amounts in textbox using Javascript

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Use following javascript function to add comma in numerics input in textbox


function Comma(Num) { Num += ''; Num = Num.replace(/,/g, ''); x = Num.split('.'); x1 = x[0]; x2 = x.length > 1 ? '.' + x[1] : ''; var rgx = /(\d)((\d)(\d{2}?)+)$/; while (rgx.test(x1)) x1 = x1.replace(rgx, '$1' + ',' + '$2'); return x1 + x2; }
Use following event of input textbox to call above function

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Devexpress Datebox date formatting in angular 6 with example

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The Devexpress DateBox in Angular is a widget that displays the date and time in one of DevExtreme predefined formats or a format defined in an
external localization library, or a type in the required date/time value. In this article,
the i will provide you different date-format which we can set on DateBox to show date and time to user.

Following is the code snippet to add Datebox in your Angular form if the you want to capture only date


<dx-date-box [value]="now" displayFormat="EEEE, MMM dd" type="date" > </dx-date-box>

Following is the custom formats we can set and depending upon its converted values will be shown.

"dd-MM-yyyy" => 28-10-2018 "EEEE, MMM dd" => Sunday, Oct 28 "dd MMM yyyy EEEE" => 28 Oct 2018 Sunday "dd-MM-yyyy EEEE" => 28-10-2018 Sunday
alternatively you can change the format as way you want


Following is the code snippet to…
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