exception catching

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Dear Friends,

i am modifying my question with simple description

I am creating a website, in my database i have a table in which one of the column is unique identifier. So from webpage when ever i am inserting duplicate values in that column its throwing an exception in Data access Layer. so i want to catch this exception in my web form as well as i want to display the error message as "can not insert duplicate values." in the webpage.

Regards,
srikar

Posted 9-Dec-09 9:48am

Saisrikar1982

Updated 10-Dec-09 6:00am

v3

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AspDotNetDev · Answer 1 · 2009-12-09T09:53:00

Solution 1

I'm sorry, what's your question? What you have described is a little unclear. Please update your question to make it more clear, making sure to describe exactly the problem you are having and what your actual question is.

Posted 9-Dec-09 9:53am

AspDotNetDev

AspDotNetDev · Answer 2 · 2009-12-09T10:23:00

Solution 2

Catch the exception in your code (VB? C#?) using a try/catch block. Then set the text of a label to "Cannot insert duplicate values".

Posted 9-Dec-09 10:23am

AspDotNetDev

r_o_b_a · Answer 3 · 2009-12-09T10:27:00

Solution 4

try <br />
{<br />
<br />
   /// do your insert here<br />
<br />
}<br />
catch (Exception ex)<br />
{<br />
   // set the friendly error here:<br />
   lbError.Text = " ... no duplicates";<br />
   return;<br />
<br />
}

Posted 9-Dec-09 10:27am

r_o_b_a

Updated 9-Dec-09 10:29am

v3

Saisrikar1982 · Answer 4 · 2009-12-09T11:46:00

can i use my code like this ?

Try
l_Database.gp_BeginTransaction()

ls_SqlStr = "insert into mst_country(cn_sid, cn_name) values("
ls_SqlStr = ls_SqlStr + "'" + po_Country.cn_sid + "', "
ls_SqlStr = ls_SqlStr + "'" + po_Country.cn_name + "') "

l_Database.gp_ExecuteQuery(ls_SqlStr)

l_Database.gp_CommitTransaction()

Catch SQLexc As SqlException
ls_ErrMsg = ls_ErrMsg + SQLexc.ToString()
Try
Catch exc As Exception
If InStr(1, SQLexc.ToString(), "UNIQUE KEY constraint") > 0 Then
o_General.lp_AddPipe(ls_ErrMsg)
ls_ErrMsg = ls_ErrMsg + "Can not insert duplicate values."
End If
End Try
l_Database.gp_RollbackTransaction()
Finally
l_Database.gp_CloseConnection()
l_Database = Nothing
End Try

AspDotNetDev · Answer 5 · 2009-12-09T11:53:00

Solution 6

I don't see why not. If it works for you, then use it.

Posted 9-Dec-09 11:53am

AspDotNetDev