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There are cases in our math calculations where we would need absolute values of negative numbers. System.Math class’s Abs method helps in such cases. It returns the absolute value of
SendKeys is very powerful. You can use SendKeys to send a different keycode from the one that was pressed. For example: private void TextBox1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode
Some of the most useful tools that work in association with the w3af web application security scanner, are listed below: Wapiti (http://wapiti.sourceforge.net/): a Python-based script that discovers attackable URLs and
Windows calculator can be used for many functions such as date calculation and unit conversion beyond its normal computation. Open the calculator then go to the view menu and choose
In the old versions of .NET, we needed to override the default context menu and override the ProcessCmdKeyfunction to return True to disable Copy-Paste of content into textboxes through keys
String.join is an easy-to-use utility method in String class. public class StringJoin{ public static void main(String args[]){ //The first argument (refered as joinString) is used to join the subsequent argument(s)
It is quite easy to get the “Everyone” account name, with the help of the DirectorySecurity and SecurityIdentifier classes. Here is a small example of getting the name and allowing
To call Java methods using Lambda expressions you can use: – Car::makeCar //Static method of a class- Car::drive // Method of an instance- Car::new //Constructor of a class- Car::drive //
Yes, you can set multiple projects to be startup projects in Visual Studio. Right click on a solution file in Visual Studio. Choose “Set startup projects.” In the dialog that
A lot of time is spent on navigating in the HTML View of ASP.NET Pages that have too much HTML to find some little details. Visual Studio 2005 IDE provides
A lot of time is spent on navigating in the HTML View of ASP.NET Pages that have too much HTML to find some little details. Visual Studio 2005 IDE provides
The Appendtext method will automatically position the cursor to the end of the text, so that it will always show the last added text. If you need to avoid that,
You can restrict the connection to a database by specifying Single User mode, as shown below: USE master;GOALTER DATABASE YourDatabaseNameSET SINGLE_USERWITH ROLLBACK IMMEDIATE;GOALTER DATABASE YourDatabaseNameSET READ_ONLY;GOALTER DATABASE YourDatabaseNameSET MULTI_USER;GO This
Ideally, this is a performance enhancement and needs lot of visibility before hand to implement at early stages. There are numerous cases when you are running on low memory and want to limit the data in your transactions.Especially, when you are sure that you dont need all the records matching your query, you can have criterias set. Stil, there could be plenty of them returned and you may want just a handfull of them or a little more. In MySQL, LIMIT is a feature that helps fetch a certain number of records matching the criteria provided Eg: SELECT * FROM `database_name`.`table_name` LIMIT 10; The value of LIMIT is defined by what your need is. Use it accordingly to allow only the specified records is returned so that you also benefit with performance and quicker processing.
Availability is measured in so-called nines notation, that corresponds to the percentage of time that a service is available. For example, if a service is available 99.9% of the time, we can say that has “three-nines availability”. This notation is used to gives us the specific amount of downtime that a service is allowed to have. Next are the availability and downtime calculations for 99% availability to 99.999% availability : 99% availability (two-nines): * 3.65 days/year (of allowed downtime) * 7.20 hours/month * 1.68 hours/week * 14.4 minutes/day 99.9% availability (three-nines): * 8.76 hours/year * 43.8 minutes/month * 10.1 minutes/week * 1.44 minutes/day 99.99% availability (four-nines): * 52.56 minutes/year * 4.38 minutes/month * 1.01 minutes/week * 8.66 seconds/day 99.999% availability (five-nines): * 5.26 minutes/year * 25.9 seconds/month * 6.05 seconds/week * 864.3 mimiseconds/day
C# provides you a way to escape the problematic characters in a string through the ???@??? symbol. Just place it before the string, and the compiler will escape those characters.For e.g. String filePath = @???c:windowssystem32???;Thus you do not have to escape the slashes in the string in the above example.
You can easily access a website’s certificate in Chrome via the developer tools. Go to developer tools (F12), Security tab. In the Security Overview section, choose “view certificate.”
Avoid?Scrolling?in?the?same?document?for?some?information. Using?the windows?”split”?feature?available?in?the?VS.NET IDE?and?you?can?split?the?document?window?into?two?and?have?two?windows?with?the?same?content?aligned?horizontally. You?can?thus?find?the?information?you?were?looking?for?and?avoid?long?scrolls.
Learn how to handle all of the exceptions from your WPF applications in one place. Avoid writing Try/Catch blocks everywhere in your code unless you really need them. Please note:
The sp_spaceused special SQL procedure displays the number of rows, disk space reserved, disk space used by a table, or indexed view in the current database. Here is a small
Spring MVC has implicit CORS support, so to use the controller method CORS configuration with @CrossOrigin annotation in your Spring Boot application does not require any specific configuration. The global
Fields with ‘Bit’ Data Types, when displayed on Web Pages show as True/False. They don’t show the actual ‘0’ / ‘1’. If you are using a DataReader to retrieve such
At times, you may need to edit the background of an image for some quick use. You do not need to learn sophisticated tools such as Photoshop for a quick
Background errors may not reach the main thread unless they are queried for. One needs to use the Error Property of the RunWorkerCompletedEventArgs argument to determine if any errors have
Did you know that you can create Folders with T-SQL? With the help of the built-in Extended Stored Procedure named xp_create_subdir you can. Here is a small example: DECLARE @DBName
The hashing function is used to generate random strings of six characters, that can be numbers or upper and lowercase letters. We need to make sure that a string is
The datatable1.Merge(datatable2) statement will merge datatable2 into datatable1. You cannot retrieve the old values in the datatable1 after the merge happens. A quick way to do that, is by creating
Often, there are multiple collections with the same kind of elements, that we would have to loop on. Instead of writing two for loops over the collections, we can use
When you create the datagridview associate an event handler for its ‘EditingControlShowing’ event. sampleDataGridView.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(DataGridViewEditingControlShowing); And in the event handler add the selectedIndexChanged eventhandler to the combobox. private
There are cases in which you would need the Enter key to operate as the Tab key. In order for the Enter key to be used as a Tab key,
