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This tutorial will show you how to Repeater pagesetting using ASP.NET 2.0 and VB.NET
This tutorial will show you how to Repeater pagesetting using ASP.NET 2.0 and VB.NET .First, you need to import the System.Text.RegularExpressions namespace..
| Imports System.Text.RegularExpressions; |
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We use the Button1_Click to do work.
The Regex class contains several static methods that allow you to use a regular expression without explicitly creating a Regex object. Using a static method is equivalent to constructing a Regex object, using it once and then destroying it. The Regex class is immutable (read-only) and is inherently thread safe. Regex objects can be created on any thread and shared between threads. The Methods of the Replace is Overloaded. Within a specified input string, replaces strings that match a regular expression pattern with a specified replacement string.
Partial Class RegexVB
Inherits System.Web.UI.Page Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Label2.Text = InputText(TextBox1.Text, TextBox1.Text.Length) End Sub Private Function InputText(ByVal text As String, ByVal maxLength As Integer) As String
text = text.Trim() If (String.IsNullOrEmpty(text)) Then
Return String.Empty End If If (text.Length > maxLength) Then
text = text.Substring(0, maxLength) End If text = Regex.Replace(text, "[\\s]{2,}", " ") text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "") text = Regex.Replace(text, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", " ") text = Regex.Replace(text, "<(.|\\n)*?>", "") text = text.Replace("'", "''") Return text End Function Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load End Sub |
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The front end Default.aspx page looks something like this:
<asp:Label ID="Label1" runat="server" Text="Please Input:" Width="91px"></asp:Label>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Submit" Width="61px" />
<br />
<br />
<asp:Label ID="Label2" runat="server" Width="254px"></asp:Label></fieldset>
<br />
<br /> |
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The flow for the code behind page is as follows.
Imports System.Text.RegularExpressions
Partial Class RegexVB
Inherits System.Web.UI.Page Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Label2.Text = InputText(TextBox1.Text, TextBox1.Text.Length) End Sub Private Function InputText(ByVal text As String, ByVal maxLength As Integer) As String
text = text.Trim() If (String.IsNullOrEmpty(text)) Then
Return String.Empty End If If (text.Length > maxLength) Then
text = text.Substring(0, maxLength) End If text = Regex.Replace(text, "[\\s]{2,}", " ") text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "") text = Regex.Replace(text, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", " ") text = Regex.Replace(text, "<(.|\\n)*?>", "") text = text.Replace("'", "''") Return text End Function Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load End Sub |
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