Replace all occurrences of certain word with in pre tags in ASP.Net using Regular Expressions

Hi sun21170d,

Refer below sample.

HTML

<asp:Label ID="lblData" runat="server" />

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    string data = "<div>hello 123 xyz 567</div><pre>I am fine xyz 125 xyz 20</pre>";
    string result = System.Text.RegularExpressions.Regex.Replace(data, @"<pre>(.*?)</pre>", m =>
    {
        return m.Groups[1].Value.Replace("xyz", "63");
    });
    lblData.Text = result;
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
    Dim data As String = "<div>hello 123 xyz 567</div><pre>I am fine xyz 125 xyz 20</pre>"
    Dim result As String = System.Text.RegularExpressions.Regex.Replace(data, "<pre>(.*?)</pre>",
                                                                        Function(m) m.Groups(1).Value.Replace("xyz", "63"))
    lblData.Text = result
End Sub

Output

I am fine 63 125 63 20