Check whether a String contains a specific character
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 check whether a String instance contains a specific character. In this .net c# tutorial code we will determine whether a String instance contains a specific character or not. Here we will check the specific character’s existence within a String instance by using the String Contains() method.
The String Contains(Char) method overload returns a value indicating whether a specified character occurs within this string. The String Contains(char value) method has a required parameter named value. The value parameter is the character to seek.
The String Contains() method returns a Boolean value. This method returns true if the value parameter occurs within this string otherwise it returns false. So using this String Contains(Char) method overload the .net c# developers can determine whether a String instance contains a specific character or not.
The following .net c# tutorial code demonstrates how we can check whether a String instance contains a specific character. In this .net c# tutorial code we will determine whether a String instance contains a specific character or not. Here we will check the specific character’s existence within a String instance by using the String Contains() method.
The String Contains(Char) method overload returns a value indicating whether a specified character occurs within this string. The String Contains(char value) method has a required parameter named value. The value parameter is the character to seek.
The String Contains() method returns a Boolean value. This method returns true if the value parameter occurs within this string otherwise it returns false. So using this String Contains(Char) method overload the .net c# developers can determine whether a String instance contains a specific character or not.
string-contains-character.aspx
<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html>
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
//this section create a string variable.
string stringVal = "abcd efgh ijkl mnop";
Label1.Text = "string..................<br />";
Label1.Text += stringVal;
//this line check string contains character 'b' or not.
Boolean resultb = stringVal.Contains('b');
//this line check string exists character 'z' or not.
Boolean resultz = stringVal.Contains('z');
Label1.Text += "<br /><br />string contains character ('b')?.........";
Label1.Text += resultb.ToString();
Label1.Text += "<br /><br />string contains character ('z')?...........";
Label1.Text += resultz.ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>c# example - string contains character</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:MidnightBlue; font-style:italic;">
c# example - string contains character
</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 contains character"
OnClick="Button1_Click"
Height="40"
Font-Bold="true"
/>
</div>
</form>
</body>
</html>
