Check the given Url is Valid

Check the given Url is Valid

In some situation we want to check the particular url (eg:google.com) is valid or not through programatically.

Here is the code for checking the url.
urlcheck.aspx

<div>
<asp:TextBox ID = "txtUrl" runat = "server" Text = "http:\\">
</asp:TextBox>
<asp:Button ID = "btnCheck" runat = "server" OnClick = "ButtonClick" Text = "Check" />
<asp:Label ID = "lblMsg" runat = "server"></asp:Label>
</div>

urlcheck.aspx.cs

protected void ButtonClick(object sender, EventArgs e)
{
try
{
System.Net.HttpWebRequest objReq = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(txtUrl.Text);
System.Net.HttpWebResponse objRes = (System.Net.HttpWebResponse)objReq.GetResponse();
if (objRes.StatusCode == System.Net.HttpStatusCode.OK)
{
lblMsg.Text = "Url is Valid";
lblMsg.ForeColor = System.Drawing.Color.SeaGreen;
}
else
{
lblMsg.Text = "Url is not Valid";
lblMsg.ForeColor = System.Drawing.Color.Red;
}
objRes.Close();
}
catch (Exception ex)
{
lblMsg.Text = ex.Message.ToString();
lblMsg.ForeColor = System.Drawing.Color.Red;
}
}