String replace first
string-replace-first.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 stringValue = "White gary red green white DarkBlue white";
Label1.Text = "string..................<br />";
Label1.Text += stringValue.ToString();
//ignore case string replace using Regex
Regex rex = new Regex("white", RegexOptions.IgnoreCase);
// this line only replace first occurence of 'white'
string returnString = rex.Replace(stringValue, "pink",1);
Label1.Text += "<br /><br />replaced string (first occurence of 'white')........";
Label1.Text += "<br />" + returnString.ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>c# example - string replace first</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:MidnightBlue; font-style:italic;">
c# example - string replace first
</h2>
<hr width="550" align="left" color="Gainsboro" />
<asp:Label
ID="Label1"
runat="server"
Font-Size="X-Large"
>
</asp:Label>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
Text="string replace first"
OnClick="Button1_Click"
Height="40"
Font-Bold="true"
/>
</div>
</form>
</body>
</html>
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