Get number of characters from String right side
The String represents text as a sequence of UTF-16 code units. The String is a sequential collection of characters that is used to represent text. The String is a sequential collection of System.Char objects.
The following .net c# tutorial code demonstrates how we can get a number of characters from the right side of a String instance. So, in this .net c# tutorial code we will take only a specified number of characters from a String object’s right side.
To achieve this, here we create a custom function whose name is ‘right’. This custom function gets a substring from the source String. We get the substring from the source String at the very end position with a specified length.
The String SubString(int startIndex) method overload retrieves a substring from this instance where the substring starts at a specified character position and continues to the end of the String.
So using SubString(int startIndex) method we can get a specified number of characters from the right side of a String instance. We have to pass the source String length minus the specified number of characters length as the startIndex parameter value to the Substring(int startIndex) method.
The following .net c# tutorial code demonstrates how we can get a number of characters from the right side of a String instance. So, in this .net c# tutorial code we will take only a specified number of characters from a String object’s right side.
To achieve this, here we create a custom function whose name is ‘right’. This custom function gets a substring from the source String. We get the substring from the source String at the very end position with a specified length.
The String SubString(int startIndex) method overload retrieves a substring from this instance where the substring starts at a specified character position and continues to the end of the String.
So using SubString(int startIndex) method we can get a specified number of characters from the right side of a String instance. We have to pass the source String length minus the specified number of characters length as the startIndex parameter value to the Substring(int startIndex) method.
string-right-function.aspx
<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html>
<script runat="server">
//custom function for extract right most characters from string
public static string right(string originalString, int length)
{
string rightString = originalString.Substring(originalString.Length - length);
return rightString;
}
protected void Button1_Click(object sender, System.EventArgs e)
{
//this section create a string variable.
string plants = "Red Birch. Spice Birch. Water Birch. Yellow Birch.";
Label1.Text = "string of plants..................<br />";
Label1.Text += plants + "<br />";
//this line get right most 6 letters from string
string rightSubString = right(plants,6);
Label1.Text += "<br />right most 6 characters from plants string........<br />";
Label1.Text += rightSubString;
Label1.Text += "<br /><br />right most 13 characters from plants string........<br />";
Label1.Text += right(plants,13);
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>c# example - string right function</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:MidnightBlue; font-style:italic;">
c# example - string right function
</h2>
<hr width="550" align="left" color="Gainsboro" />
<asp:Label
ID="Label1"
runat="server"
Font-Size="Large"
>
</asp:Label>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
Text="string right function"
OnClick="Button1_Click"
Height="40"
Font-Bold="true"
/>
</div>
</form>
</body>
</html>

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