DateTime myDate; if(DateTime.TryParse(txtBirthDate.Text, out myDate)) { //Valid Date } else { //Invalid Date }
Category: C#
Convert comma separated string into a List in C#
string myList = “9,3,12,43,2”; List<int> intList = myList.Split(‘,’).Select(int.Parse).ToList();
Converting a List to a comma separated string in C#
List<int> list = new List<int>() {1,2,3}; string.Join<int>(“,”, list) Join has generic overloads. It is so much easier to use it in that way to convert your list to the different types.
How to add placeholder to Multiple Selection DropDownList in Asp.Net MVC
@Html.ListBox( “Countries”, ViewBag.AllCountries as MultiSelectList, new { @class = “form-control”, data_placeholder = “Choose a Country…” } )
Convert List to List in one line in C#
string sNumbers = “1,2,3,4,5”; var numbers = sNumbers.Split(‘,’).Select(Int32.Parse).ToList();
Checking multiple contains on one string
new[] {“,”, “/”}.Any(input.Contains) or you can use Regex Regex.IsMatch(input, @”[,/]”);
Default Values for Data Types in C#
Table below shows the default value for the different predefined data types. Type Default sbyte, byte, short, ushort, int, uint, long, ulong 0 char ‘\x0000’ float 0.0f double 0.0d decimal 0.0m bool false object null string null As you can see, for the integral value types, the default value is zero. The default value for […]
Creating Multiline textbox using Html.Helper function in Asp.Net MVC
How to split string and get first (or n-th) value only
string myValueToSplit = “Istanbul, Tokyo, Seoul, Bangkok, Bali, Minsk, Belgrade, Kiev”; var theFirstValue = myValueToSplit.Split(‘,’)[0]; //OUTPUT: theFirstValue = “Istanbul” //You can change [0] as you wish. //For example, if you want to get Kiev, make it [7]
Passing parameters to JavaScript files
You can assign an id to the <script> element and passing the arguments as data-* attributes. The resulting <script> tag would look something like this:
How to solve ‘Size property has an invalid size of 0’ in C#
You need to define a length when specifying the varchar parameter: SqlParameter TheFirstJob = cmd.Parameters.Add(“@spParam”, SqlDbType.VarChar, 50); Note: You should use the same length as defined in your SQL Server stored procedure.
Formatting a Nullable DateTime with ToString() in ASP.Net MVC
Let’s say we have a Nullable DateTime named StartTime [DisplayFormat(DataFormatString = “{0:dd.MM.yyyy}”)] public Nullable<System.DateTime> StartTime { get; set; }
Define a Default Value when insert New Record From ASPxGridView
To initialize DataRow’s default values handle InitNewRow event of the required ASPxGridView control and initialize the default values by using e.NewValues dictionary in the following manner:
Constructors and Its Types in C#
Constructor is a special method of the class that is automatically invoked when an instance of the class is created is called a constructor. The main use of constructors is to initialize the private fields of the class while creating an instance for the class. When you have not created a constructor in the class, the compiler […]
What does the word ‘new’ mean exactly in C#?
In C# (and many other languages) you will find that you use new often as it is fundamental to using types and classes. The new keyword does pretty much what it says: it will create a new instance of a class or type, assigning it a location in memory. Let me try and illustrate this. Company company; Here […]