How Do I Parameterise This Sql Statement?

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hi, i have the following SQL statement to search for records in a table. how should i convert it into a parameterised statement to prevent sql injection attacks? thanks

VB

    con.Open()
        Dim da As New SqlDataAdapter("Select * from Students " & _
           "where student_id like '%" & Me.srcTxt.Text.Trim & "%' " & _
           "or " & _
         "student_firstname like '%" & Me.srcTxt.Text.Trim & "%' " & _
         "or " & _
       "student_lastname like '%" & Me.srcTxt.Text.Trim & "%'", con)

       da.Fill(ds)
       con.Close()

For i As Integer = 0 To ds.Tables(0).Rows.Count - 1
      Dim lvi As New ListViewItem
      lvi.Text = ds.Tables(0).Rows(i)(0).ToString()
           For j As Integer = 1 To ds.Tables(0).Rows(i).ItemArray.Length - 1
               lvi.SubItems.Add(ds.Tables(0).Rows(i)(j).ToString())
           Next
       lvw.Items.Add(lvi)
 Next

Posted 20-Feb-14 20:18pm

hlsc1983

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Peter Leow · Answer 1 · 2014-02-20T21:03:00

Solution 2

Read this: MSDN[^]

Posted 20-Feb-14 21:03pm

Peter Leow

The14thNoah · Answer 2 · 2014-02-20T20:25:00

C#

public sub Page_Load()

Me.DoFunction(Me.srcTxt.Text);//call the parametarized method
end sub


public sub DoFunction(ByVal text as String)
con.Open()
                    Dim da As New SqlDataAdapter("Select * from Students " & _
    		 "where student_id like '%" & text & "%' " & _
                       "or " & _
                     "student_firstname like '%" & text & "%' " & _
                     "or " & _
                   "student_lastname like '%" & text & "%'", con)
           
                   da.Fill(ds)
                   con.Close()
end sub