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POCan't retrieve data with dot symbol from sql database
 

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  1. POCan't retrieve data with dot symbol from sql database
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    <p>In my project (vb.net) I store the ip address of a website in a table with column of type <code>nvarchar</code>. But I can't retrieve it from the table. I wonder if its a problem with "dot" symbol. Please help.</p> <p>This is the command that I use</p> <pre><code> query = "select *from restricted_sites where site_address='" + webip + "'" </code></pre> <p><code>webip</code> is the ip address of web site.</p> <p><code></p> <pre><code>Imports System.Data.SqlClient Imports System.Net Public Class restrict Private Sub clear_button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles clear_button.Click site_TextBox1.Text = "" addr_TextBox1.Text = "" End Sub Private Sub submit_button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles submit_button.Click Dim connectionstr As String Dim query As String Dim conn As SqlConnection Dim cmd As SqlCommand Dim webip As String Dim hostname As IPHostEntry = Dns.GetHostByName(addr_TextBox1.Text) Dim ip As IPAddress() = hostname.AddressList Try webip = ip(0).ToString connectionstr = "Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\URLTrack.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True" conn = New SqlConnection(connectionstr) conn.Open() query = "insert into restricted_sites values('" + site_TextBox1.Text + "','" + webip + "')" cmd = New SqlCommand(query, conn) cmd.ExecuteNonQuery() MsgBox("Website added for restriction", MsgBoxStyle.Information) conn.Close() Catch ex As SqlException End Try End Sub End Class </code></pre> <p></code></p> <pre><code>Private Sub Combox1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Combox1.KeyPress If e.KeyChar = Convert.ToChar(Keys.Enter) Then Dim connectionstr As String Dim query As String Dim cmd As SqlCommand Dim reader As SqlDataReader Dim conn As SqlConnection Dim url As String = "" Dim webip As String Dim hostname As IPHostEntry = Dns.GetHostByName(Combox1.Text) Dim ip As IPAddress() = hostname.AddressList webip = ip(0).ToString connectionstr = "Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\URLTrack.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True" conn = New SqlConnection(connectionstr) conn.Open() query = "select * from restricted_sites where site_address='" + webip + "'" cmd = New SqlCommand(query, conn) reader = cmd.ExecuteReader While (reader.Read()) url = reader(2) End While reader.Close() MsgBox(url, MsgBoxStyle.Information) If webip &lt;&gt; url Then AxWebBrowser1.Navigate(Combox1.Text) Combox1.Text = AxWebBrowser1.LocationURL Else MsgBox("This Web Page is Restricted.Contact the ADMIN for Further Info", MsgBoxStyle.Critical) End If End If If e.KeyChar = Convert.ToChar(Keys.Escape) Then AxWebBrowser1.Stop() End If End Sub </code></pre> <p>The second code is the comparing part. query = "select * from restricted_sites where site_address='" + webip + "'" this code is the problem. This is my code for restricting web sites through matching with ip address stored in database,when the url is being navigated.</p>
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    1. USDeepak P C
    1. USDeepak P C
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      1. POCan't retrieve data with dot symbol from sql database
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      1. VTUpMod
    1. COYou have a SQL injection vulnerability.
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      1. POCan't retrieve data with dot symbol from sql database
      1. USSLaks
    2. COCan you please help me with how i can get rid SQL Injection Vulnerability?
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      1. USDeepak P C
    3. CORead Wikipedia.
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      1. USSLaks
 

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