i am getting Data type mismatch in criteria expression in vb.net

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I am using visual studio 2008 nd ms access...i am getting the error in my insert command i have modified the database table also but still i am getting the same error.plz help me..
Private Sub btninsert_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btninsert.Click
con.Open()
cmd = New OleDbCommand("insert into b1 values( " & TextBox1.Text & " , ' " & TextBox2.Text & " ' , ' " & TextBox3.Text & " ' , ' " & TextBox4.Text & " ' , " & TextBox5.Text & " , ' " & TextBox6.Text & " ' , " & TextBox7.Text & " , " & TextBox8.Text & " , ' " & TextBox9.Text & " ' , " & TextBox10.Text & " , " & TextBox11.Text & " , ' " & TextBox12.Text & " ' , " & TextBox13.Text & " , " & TextBox14.Text & " , " & TextBox15.Text & " , " & TextBox16.Text & " , " & TextBox17.Text & " )", con)
cmd.ExecuteNonQuery()
MsgBox("INSERTED")
con.Close()

Posted 13-Mar-15 5:18am

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-03-13T05:58:00

Your approach is wrong from the very beginning. You should never create a query by concatenation of string taken from your UI. Instead, you need to use parametrized statements. Please see: http://msdn.microsoft.com/en-us/library/ff648339.aspx[^].

If you do it your way, you make your application totally vulnerable to a well-known exploit: SQL Injection. The user can write anything in the UI, including some SQL fragment. Are you getting the idea? This is how: http://xkcd.com/327[^].

Please see my past answers:
EROR IN UPATE in com.ExecuteNonQuery();[^],
hi name is not displaying in name?[^].

—SA