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

September 25, 2015

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

Samples

C# Sample

static void Main(string[] args)
        {
            Console.OutputEncoding = System.Text.Encoding.Unicode;
            const string unicodeText = @" Ё Ђ Ѓ п р с т у ф х ц ч ";
            const string pattern = @"\u0444";
            const string patternMulti = @"\u0444|\u0401"; 
            string result = String.Empty;

            Console.WriteLine("### SINGLE REPLACE ####");
            result = Regex.Replace(unicodeText, pattern, "HELLO", RegexOptions.Compiled);
            Console.WriteLine(string.Format("Text before: {0}",unicodeText));
            Console.WriteLine(string.Format("Text after: {0}", result));
            Console.WriteLine("### MULTI REPLACE ####");
            result = Regex.Replace(unicodeText, patternMulti, "HELLO", RegexOptions.Compiled);
            Console.WriteLine(string.Format("Text before: {0}", unicodeText));
            Console.WriteLine(string.Format("Text after: {0}", result));
            
            Console.Read();
        }

static void Main(string[] args)

{

Console.OutputEncoding = System.Text.Encoding.Unicode;

const string unicodeText = @" Ё Ђ Ѓ п р с т у ф х ц ч ";

const string pattern = @"\u0444";

const string patternMulti = @"\u0444|\u0401";

string result = String.Empty;

Console.WriteLine("### SINGLE REPLACE ####");

result = Regex.Replace(unicodeText, pattern, "HELLO", RegexOptions.Compiled);

Console.WriteLine(string.Format("Text before: {0}",unicodeText));

Console.WriteLine(string.Format("Text after: {0}", result));

Console.WriteLine("### MULTI REPLACE ####");

result = Regex.Replace(unicodeText, patternMulti, "HELLO", RegexOptions.Compiled);

Console.WriteLine(string.Format("Text before: {0}", unicodeText));

Console.WriteLine(string.Format("Text after: {0}", result));

Console.Read();

}

VB.NET Sample

Sub Main(args As String())
             Console.OutputEncoding = System.Text.Encoding.Unicode
             Const  unicodeText As String = " Ё Ђ Ѓ п р с т у ф х ц ч "
             Const  pattern As String = "\u0444"
             Const  patternMulti As String = "\u0444|\u0401"
             Dim result As String = [String].Empty

             Console.WriteLine("### SINGLE REPLACE ####")
             result = Regex.Replace(unicodeText, pattern, "HELLO", RegexOptions.Compiled)
             Console.WriteLine(String.Format("Text before: {0}", unicodeText))
             Console.WriteLine(String.Format("Text after: {0}", result))
             Console.WriteLine("### MULTI REPLACE ####")
             result = Regex.Replace(unicodeText, patternMulti, "HELLO", RegexOptions.Compiled)
             Console.WriteLine(String.Format("Text before: {0}", unicodeText))
             Console.WriteLine(String.Format("Text after: {0}", result))

             Console.Read()
       End Sub

Sub Main(args As String())

Console.OutputEncoding = System.Text.Encoding.Unicode

Const unicodeText As String = " Ё Ђ Ѓ п р с т у ф х ц ч "

Const pattern As String = "\u0444"

Const patternMulti As String = "\u0444|\u0401"

Dim result As String = [String].Empty

Console.WriteLine("### SINGLE REPLACE ####")

result = Regex.Replace(unicodeText, pattern, "HELLO", RegexOptions.Compiled)

Console.WriteLine(String.Format("Text before: {0}", unicodeText))

Console.WriteLine(String.Format("Text after: {0}", result))

Console.WriteLine("### MULTI REPLACE ####")

result = Regex.Replace(unicodeText, patternMulti, "HELLO", RegexOptions.Compiled)

Console.WriteLine(String.Format("Text before: {0}", unicodeText))

Console.WriteLine(String.Format("Text after: {0}", result))

Console.Read()

End Sub

Result

If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via Email.

Related links:

Regex.Replace Method

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

Administrator

June 29, 2015

0 Comments

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#

public static string ChangeEncoding(this string input, Encoding sourceEncoding, Encoding targetEncoding)
{
	byte[] utfBytes = sourceEncoding.GetBytes(input);
	byte[] isoBytes = Encoding.Convert(sourceEncoding, targetEncoding, utfBytes);
	return targetEncoding.GetString(isoBytes);
}

public static string ChangeEncoding(this string input, Encoding sourceEncoding, Encoding targetEncoding)

{

byte[] utfBytes = sourceEncoding.GetBytes(input);

byte[] isoBytes = Encoding.Convert(sourceEncoding, targetEncoding, utfBytes);

return targetEncoding.GetString(isoBytes);

}

VB.NET Sample

<System.Runtime.CompilerServices.Extension> _
Public Shared Function ChangeEncoding(input As String, sourceEncoding As Encoding, targetEncoding As Encoding) As String
	Dim utfBytes As Byte() = sourceEncoding.GetBytes(input)
	Dim isoBytes As Byte() = Encoding.Convert(sourceEncoding, targetEncoding, utfBytes)
	Return targetEncoding.GetString(isoBytes)
End Function

<System.Runtime.CompilerServices.Extension> _

Public Shared Function ChangeEncoding(input As String, sourceEncoding As Encoding, targetEncoding As Encoding) As String

Dim utfBytes As Byte() = sourceEncoding.GetBytes(input)

Dim isoBytes As Byte() = Encoding.Convert(sourceEncoding, targetEncoding, utfBytes)

Return targetEncoding.GetString(isoBytes)

End Function

If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via Email.

Related links:

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

Administrator

June 29, 2015

1 Comment

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

public static string ToUnsecureString(this SecureString source)
{
	var returnValue = IntPtr.Zero;
	try
	{
		returnValue = Marshal.SecureStringToGlobalAllocUnicode(source);
		return Marshal.PtrToStringUni(returnValue);
	}
	finally
	{
		Marshal.ZeroFreeGlobalAllocUnicode(returnValue);
	}
}

public static string ToUnsecureString(this SecureString source)

{

var returnValue = IntPtr.Zero;

try

{

returnValue = Marshal.SecureStringToGlobalAllocUnicode(source);

return Marshal.PtrToStringUni(returnValue);

}

finally

{

Marshal.ZeroFreeGlobalAllocUnicode(returnValue);

}

VB.NET Sample

<System.Runtime.CompilerServices.Extension> _
Public Shared Function ToUnsecureString(source As SecureString) As String
	Dim returnValue = IntPtr.Zero
	Try
		returnValue = Marshal.SecureStringToGlobalAllocUnicode(source)
		Return Marshal.PtrToStringUni(returnValue)
	Finally
		Marshal.ZeroFreeGlobalAllocUnicode(returnValue)
	End Try
End Function

<System.Runtime.CompilerServices.Extension> _

Public Shared Function ToUnsecureString(source As SecureString) As String

Dim returnValue = IntPtr.Zero

Try

returnValue = Marshal.SecureStringToGlobalAllocUnicode(source)

Return Marshal.PtrToStringUni(returnValue)

Finally

Marshal.ZeroFreeGlobalAllocUnicode(returnValue)

End Try

End Function

If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via Email.

Related links:

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

Administrator

June 29, 2015

0 Comments

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

public static SecureString ToSecureString(this string source)
{
	if (string.IsNullOrWhiteSpace(source))
	{
		return null;
	}
	var result = new SecureString();
	foreach (var c in source)
	{
		result.AppendChar(c);
	}
	return result;
}

public static SecureString ToSecureString(this string source)

{

if (string.IsNullOrWhiteSpace(source))

{

return null;

}

var result = new SecureString();

foreach (var c in source)

{

result.AppendChar(c);

}

return result;

}

VB.NET Sample

<System.Runtime.CompilerServices.Extension> _
Public Shared Function ToSecureString(source As String) As SecureString
	If String.IsNullOrWhiteSpace(source) Then
		Return Nothing
	End If
	Dim result = New SecureString()
	For Each c As char In source
		result.AppendChar(c)
	Next
	Return result
End Function

<System.Runtime.CompilerServices.Extension> _

Public Shared Function ToSecureString(source As String) As SecureString

If String.IsNullOrWhiteSpace(source) Then

Return Nothing

End If

Dim result = New SecureString()

For Each c As char In source

result.AppendChar(c)

Return result

End Function

If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via Email.

Related links:

How to read a embedded resource to String in C# and VB.NET

Administrator

June 19, 2015

0 Comments

To read a embedded resource to String in C# and VB.NET you can use the snippet below.
Keep in mind that this snippet is using Encoding.Default which might not always work in all situations correctly.

Sample C#

public string ReadEmbeddedRessourceToString(Assembly assembly, string searchPattern)
{
	var resourceName = assembly.GetManifestResourceNames().FirstOrDefault(x => x.Contains(searchPattern));
	using (var stream = assembly.GetManifestResourceStream(resourceName))
	{
		if (stream != null)
		{
			using (var reader = new StreamReader(stream,Encoding.Default))
			{
				return reader.ReadToEnd();
			}
		}
	}
	return string.Empty;
}

public string ReadEmbeddedRessourceToString(Assembly assembly, string searchPattern)

{

var resourceName = assembly.GetManifestResourceNames().FirstOrDefault(x => x.Contains(searchPattern));

using (var stream = assembly.GetManifestResourceStream(resourceName))

{

if (stream != null)

{

using (var reader = new StreamReader(stream,Encoding.Default))

{

return reader.ReadToEnd();

}

return string.Empty;

}

Sample VB.NET (autogenerated)

Public Function ReadEmbeddedRessourceToString(assembly As Assembly, searchPattern As String) As String
	Dim resourceName = assembly.GetManifestResourceNames().FirstOrDefault(Function(x) x.Contains(searchPattern))
	Using stream = assembly.GetManifestResourceStream(resourceName)
		If stream IsNot Nothing Then
			Using reader = New StreamReader(stream,Encoding.Default)
				Return reader.ReadToEnd()
			End Using
		End If
	End Using
	Return String.Empty
End Function

Public Function ReadEmbeddedRessourceToString(assembly As Assembly, searchPattern As String) As String

Dim resourceName = assembly.GetManifestResourceNames().FirstOrDefault(Function(x) x.Contains(searchPattern))

Using stream = assembly.GetManifestResourceStream(resourceName)

If stream IsNot Nothing Then

Using reader = New StreamReader(stream,Encoding.Default)

Return reader.ReadToEnd()

End Using

End If

End Using

Return String.Empty

End Function

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

Administrator

June 17, 2015

0 Comments

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

How to read a String to Textreader using C# and VB.NET

Administrator

April 29, 2015

0 Comments

To read a String to Textreader using C# and VB.NET you can use the snippet below.

Sample C#

using(TextReader textReader = new StringReader("string"))
{
    //...
}

Sample VB.NET

Using textReader As TextReader = New StringReader("string")
    '...
End Using

How to trim a string using XSL 1.0

Administrator

March 2, 2015

4 Comments

Since XSL 1.0 dows not have inbuild Trimming functions for Strings, you need to define your own templates.
You can use the Trim Templates shown in the codesnippet below.

Sample XSL

<xsl:variable name="whitespaceCharacters" select="'&#09;&#10;&#13; '" />
    
    <!-- Trim Right side of the String -->
    <xsl:template name="TrimRight">
        <xsl:param name="input" />
        <xsl:param name="trim" select="$whitespaceCharacters" />
        
        <xsl:variable name="length" select="string-length($input)" />
        <xsl:if test="string-length($input) &gt; 0">
            <xsl:choose>
                <xsl:when test="contains($trim, substring($input, $length, 1))">
                    <xsl:call-template name="TrimRight">
                        <xsl:with-param name="input" select="substring($input, 1, $length - 1)" />
                        <xsl:with-param name="trim" select="$trim" />
                    </xsl:call-template>
                </xsl:when>
                <xsl:otherwise>
                    <xsl:value-of select="$input" />
                </xsl:otherwise>
            </xsl:choose>
        </xsl:if>
    </xsl:template>
    
    <!-- Trim Left side of the String -->
    <xsl:template name="TrimLeft">
        <xsl:param name="input" />
        <xsl:param name="trim" select="$whitespaceCharacters" />
        
        <xsl:if test="string-length($input) &gt; 0">
            <xsl:choose>
                <xsl:when test="contains($trim, substring($input, 1, 1))">
                    <xsl:call-template name="TrimLeft">
                        <xsl:with-param name="input" select="substring($input, 2)" />
                        <xsl:with-param name="trim" select="$trim" />
                    </xsl:call-template>
                </xsl:when>
                <xsl:otherwise>
                    <xsl:value-of select="$input" />
                </xsl:otherwise>
            </xsl:choose>
        </xsl:if>
    </xsl:template>
    
    <!-- Trim both sides of the String -->
    <xsl:template name="Trim">
        <xsl:param name="input" />
        <xsl:param name="trim" select="$whitespaceCharacters" />
        <xsl:call-template name="TrimRight">
            <xsl:with-param name="input">
                <xsl:call-template name="TrimLeft">
                    <xsl:with-param name="input" select="$input" />
                    <xsl:with-param name="trim" select="$trim" />
                </xsl:call-template>
            </xsl:with-param>
            <xsl:with-param name="trim" select="$trim" />
        </xsl:call-template>
    </xsl:template>

How to use substring in IOS using Objective-C

Administrator

February 27, 2015

3 Comments

To use substring in IOS using Objective-C you can use the snippet below.

Sample Objective-C

NSString *myString = @"http://codesnippets.fesslersoft.de";
NSString *myNewString = [myString substringFromIndex:7]; //myNewString will be "codesnippets.fesslersoft.de"

Case-Insensitive String.Replace in C# and VB.NET

Administrator

February 25, 2015

3 Comments

Here you can find a Case-Insensitive String.Replace method for C# and VB.NET.

Sample C#

public static string ReplaceWithStringComparison(string input, string search, string replace, StringComparison comparison)
{
	var stringBuilder = new StringBuilder();
	var lastIndex = 0;
	var currIndex = input.IndexOf(search, comparison);
	while (currIndex != -1)
	{
		stringBuilder.Append(input.Substring(lastIndex, currIndex - lastIndex));
		stringBuilder.Append(replace);
		currIndex += search.Length;
		lastIndex = currIndex;
		currIndex = input.IndexOf(search, currIndex, comparison);
	}
	stringBuilder.Append(input.Substring(lastIndex));
	return stringBuilder.ToString();
}

Sample VB.NET

Public Shared Function ReplaceWithStringComparison(input As String, search As String, replace As String, comparison As StringComparison) As String
	Dim stringBuilder = New StringBuilder()
	Dim lastIndex = 0
	Dim currIndex = input.IndexOf(search, comparison)
	While currIndex <> -1
		stringBuilder.Append(input.Substring(lastIndex, currIndex - lastIndex))
		stringBuilder.Append(replace)
		currIndex += search.Length
		lastIndex = currIndex
		currIndex = input.IndexOf(search, currIndex, comparison)
	End While
	stringBuilder.Append(input.Substring(lastIndex))
	Return stringBuilder.ToString()
End Function

CODE SNIPPETS

CODESNIPPETS FOR .NET, SQL, JAVASCRIPT, JQUERY and more

characters

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

Samples

C# Sample

VB.NET Sample

Result

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

Samples

Sample C#

VB.NET Sample

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

Samples

C# Sample

VB.NET Sample

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

Samples

C# Sample

VB.NET Sample

How to read a embedded resource to String in C# and VB.NET

Sample C#

Sample VB.NET (autogenerated)

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

Sample C#

Sample VB.NET (autoconverted)

How to read a String to Textreader using C# and VB.NET

Sample C#

Sample VB.NET

How to trim a string using XSL 1.0

Sample XSL

How to use substring in IOS using Objective-C

Sample Objective-C

Case-Insensitive String.Replace in C# and VB.NET

Sample C#

Sample VB.NET