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 &nbsp; &nbsp; &nbsp; &nbsp;Dim constraint_error As Boolean = True<br />
&nbsp; &nbsp; &nbsp; &nbsp; Try<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; If constraint_error Then Throw New Exception(constraint_error<wbr />.ToString)<wbr /><br />
&nbsp; &nbsp; &nbsp; &nbsp; Catch ex As Exception<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Response.Write(&quot;#&quot; &amp;&nbsp;ex.ToString &amp;&nbsp;&quot;#&quot;)<br />
&nbsp; &nbsp; &nbsp; &nbsp; End Try
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       Dim constraint_error As Boolean = True
        Try
            If constraint_error Then Throw New Exception(constraint_error.ToString)
        Catch ex As Exception
            Response.Write("#" & ex.ToString & "#")
        End Try

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<div class="content wysiwyg-content">
How do I catch a unique error constraint error on a try and catch block..... <br />
<br />
say i want to trap a specific error like <br />
<br />
if constraint_error then<br />
<br />
' DO THIS<br />
<br />
end if
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How do I catch a unique error constraint error on a try and catch block..... 

say i want to trap a specific error like 

if constraint_error then

' DO THIS

end if

unique constraint

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.