How to remove specific (unicode) characters in a String using C# and VB.NET

Here is an example on how to remove specific (unicode) characters in a String using C# and VB.NET

Samples

C# Sample

VB.NET Sample

Result

RegexReplaceUnicodeChars

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How to change the encoding of a String using C# and VB.NET

To change the encoding of a String using .NET you can use this Extension Method which is part of the Fesslersoft.Extensions. This method needs a source and a target encoding. Some people might find the source encoding parameter needless, but as Joel stated in his excellent blogpost

“It does not make sense to have a string without knowing what encoding it uses” (Joel Spolsky)

Samples

Sample C#

VB.NET Sample

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How to convert a Securestring to String using C# and VB.NET

Here is an example on how to convert a Securestring to String using C# and VB.NET.
Please remember that storing the data in a plain string will be beat the whole point of using SecureString. This method should only be used for testing purposes.
This Extension Method is now part of the Fesslersoft.Extensions.

Samples

C# Sample

VB.NET Sample

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How to convert a String to Securestring using C# and VB.NET

Here is an example on how to convert a String to Securestring using C# and VB.NET.
Please remember that the plain string which will be converted to SecureString beats the whole point of using SecureString. This method should only be used for testing purposes.
This Extension Method is now part of the Fesslersoft.Extensions.

Samples

C# Sample

VB.NET Sample

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How to convert Color to Hex and Hex to Color using C# and VB.NET

To convert a Color to Hex and vice versa using C# and VB.NET you can use the snippets below.

Sample C#

private static String ColorToHex(Color inputColor)
{
	return ColorTranslator.ToHtml(inputColor);
}

private static Color HexToColor(string hexInput)
{
	return ColorTranslator.FromHtml(hexInput);
}

Sample VB.NET (autoconverted)

Private Shared Function ColorToHex(inputColor As Color) As [String]
	Return ColorTranslator.ToHtml(inputColor)
End Function

Private Shared Function HexToColor(hexInput As String) As Color
	Return ColorTranslator.FromHtml(hexInput)
End Function

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How to match strings using wildcards in C# and VB.NET

To match strings using wildcards in C# and VB.NET you can use the following snippet.
It will internally convert the wildcard string to a Regex.

The Console-Output of this sample will be:

C:\Test\myFile01.xml
C:\Test\myFile02.xml

Sample C#

#region

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

#endregion

namespace de.fesslersoft.RegexWildCard
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            var fileList = new List<String>();
            fileList.Add(@"C:\Test\myFile01.xml");
            fileList.Add(@"C:\Test\myFile02.xml");
            fileList.Add(@"C:\Test\myFolder01.xml");
            fileList.Add(@"C:\Test\myFolder02.xml");

            var wildCard = new Wildcard("*File*.xml", RegexOptions.IgnoreCase);
            foreach (var file in fileList.Where(file => wildCard.IsMatch(file)))
            {
                Console.WriteLine(file);
            }
            Console.Read();
        }
    }


    public class Wildcard : Regex
    {
        public Wildcard(string pattern) : base(ToRegex(pattern))
        {
        }

        public Wildcard(string pattern, RegexOptions options) : base(ToRegex(pattern), options)
        {
        }

        public static string ToRegex(string pattern)
        {
            return "^" + Escape(pattern).Replace("\\*", ".*").Replace("\\?", ".") + "$";
        }
    }
}

Sample VB.NET (autoconverted)

#Region ""

Imports System.Collections.Generic
Imports System.Linq
Imports System.Text.RegularExpressions

#End Region

Namespace de.fesslersoft.RegexWildCard
	Friend Class Program
		Private Shared Sub Main(args As String())
			Dim fileList = New List(Of [String])()
			fileList.Add("C:\Test\myFile01.xml")
			fileList.Add("C:\Test\myFile02.xml")
			fileList.Add("C:\Test\myFolder01.xml")
			fileList.Add("C:\Test\myFolder02.xml")

			Dim wildCard = New Wildcard("*File*.xml", RegexOptions.IgnoreCase)
			For Each file As var In fileList.Where(Function(file) wildCard.IsMatch(file))
				Console.WriteLine(file)
			Next
			Console.Read()
		End Sub
	End Class


	Public Class Wildcard
		Inherits Regex
		Public Sub New(pattern As String)
			MyBase.New(ToRegex(pattern))
		End Sub

		Public Sub New(pattern As String, options As RegexOptions)
			MyBase.New(ToRegex(pattern), options)
		End Sub

		Public Shared Function ToRegex(pattern As String) As String
			Return "^" + Escape(pattern).Replace("\*", ".*").Replace("\?", ".") + "$"
		End Function
	End Class
End Namespace

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Generic Type Conversion snippet for C# and VB.NET

Here you can find a generic Type conversion snippet for C# and VB.NET.

Sample C#

public static T GenericConvert<T, X>(X value) where X : IConvertible
{
	return (T)Convert.ChangeType(value, typeof(T));
}

Sample VB.NET

Public Shared Function GenericConvert(Of T, X As IConvertible)(value As X) As T
	Return DirectCast(Convert.ChangeType(value, GetType(T)), T)
End Function

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How to get return Value from method invocation using reflection in C# and VB.NET

To get return Value from method invocation using reflection in C# and VB.NET you can use the snippet below.

Sample C#

var returnValue = (Int32)methodInfo.Invoke(null,null); //just cast the returned object of Invoke to the needed Type. Theres no difference if it is a static method/class or not

Sample VB.NET

Dim returnValue = DirectCast(methodInfo.Invoke(Nothing, Nothing), Int32) 'just cast the returned object of Invoke to the needed Type. Theres no difference if it is a static method/class or not

For more informations on how to invoke methods from other assemblies using reflection see:

  • How to call a static method in different assembly using Reflection in C# and VB.NET
  • How to call a non-static method in different assembly using Reflection in C# and VB.NET
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    How to convert string to int using Objective-C

    To convert string to int using Objective-C you can use the snippet below.

    Sample Objective-C

    [myString intValue];
    

    or you can do it like this.

    myString.intValue;
    

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