Detect URL from string and convert it to link in ASP.Net

Hi nauna,

Check this example. Now please take its reference and correct your code.

HTML

<asp:ListView ID="lvDetails" runat="server">
    <ItemTemplate>
        <div style="float: left; border: 1px solid #ccc;">
            <%# Eval("Id") %>
        </div>
        <div style="border: 1px solid #ccc;">
            <asp:Label ID="lblText" Text='<%# ConvertTextUrlToLink(Eval("Text").ToString()) %>'
                runat="server" />
        </div>
        <br />
    </ItemTemplate>
</asp:ListView>

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        System.Data.DataTable dt = new System.Data.DataTable();
        dt.Columns.AddRange(new System.Data.DataColumn[] { 
                    new System.Data.DataColumn("Id", typeof(int)),
                    new System.Data.DataColumn("Text", typeof(string)) });
        dt.Rows.Add(1, "this is some link https://i.imgur.com/8z1737Y.gif");
        dt.Rows.Add(2, "this is some link http://i.imgur.com/qR7DWZX.gif");
        lvDetails.DataSource = dt;
        lvDetails.DataBind();
    }
}

public string ConvertTextUrlToLink(string url)
{
    string str = @"((www\.|(http|https)+\:\/\/)[_.a-z0-9-]+\.[a-z0-9\/_:@=.+?,##%&~-]*[^.|\'|\# |!|\(|?|,| |>|<|;|\)])";
    Regex regex = new Regex(str, RegexOptions.IgnoreCase);
    return regex.Replace(url, "<a href=\"$1\" target=\"_blank\">$1</a>").Replace("href=\"www", "href=\"https://www");
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim dt As System.Data.DataTable = New System.Data.DataTable()
        dt.Columns.AddRange(New System.Data.DataColumn() {New System.Data.DataColumn("Id", GetType(Integer)), New System.Data.DataColumn("Text", GetType(String))})
        dt.Rows.Add(1, "this is some link https://i.imgur.com/8z1737Y.gif")
        dt.Rows.Add(2, "this is some link http://i.imgur.com/qR7DWZX.gif")
        lvDetails.DataSource = dt
        lvDetails.DataBind()
    End If
End Sub

Public Function ConvertTextUrlToLink(ByVal url As String) As String
    Dim str As String = "((www\.|(http|https)+\:\/\/)[_.a-z0-9-]+\.[a-z0-9\/_:@=.+?,##%&~-]*[^.|\'|\# |!|\(|?|,| |>|<|;|\)])"
    Dim regex As Regex = New Regex(str, RegexOptions.IgnoreCase)
    Return regex.Replace(url, "<a href=""$1"" target=""_blank"">$1</a>").Replace("href=""www", "href=""https://www")
End Function

Screenshot