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Old November 10th, 2006, 05:01 AM
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Default (VB.net): Input string was not in a correct format

(vb.net 1.1 -- sql server) i'm using following insert code. It is working fine when all the fields are filled but it is gives error when fields which allows null values are not filled...... i'm getting following errorVB.net): Input string was not in a correct format. plz suggest something, i'll be really thkful.


            myConn = New SqlConnection(ConfigurationSettings.AppSettings("S qlConnection.ConnectionString"))
            myConn.Open()

            myComm = New SqlCommand("Add_BookDetails", myConn)
            myComm.CommandType = CommandType.StoredProcedure

            Dim ins As SqlParameterCollection
            ins = myComm.Parameters

            Dim status As String
            status = 1


            ins.Add("@BookID", SqlDbType.Int).Value = txtBookID.Text 'null allowed
            ins.Add("@Status", SqlDbType.Int).Value = status
            ins.Add("@Category", SqlDbType.VarChar).Value = txtBookCategory.Text
            ins.Add("@Title", SqlDbType.VarChar).Value = txtBookTitle.Text
            ins.Add("@Author", SqlDbType.VarChar).Value = txtAuthorName.Text 'null allowed
            ins.Add("@Description", SqlDbType.VarChar).Value = txtDescription.Text 'null allowed
            ins.Add("@ISBN_No", SqlDbType.VarChar).Value = txtISBN.Text 'null allowed
            ins.Add("@Price", SqlDbType.Float).Value = txtBookPrice.Text 'null allowed
            ins.Add("@PurchaseDate", SqlDbType.DateTime).Value = txtDate.Text 'null allowed
            ins.Add("@PublisherName", SqlDbType.VarChar).Value = txtPublisherName.Text 'null allowed

            myComm.ExecuteNonQuery()
            myConn.Close()



        Catch ex As Exception
            Response.Write(ex.Message)
        End Try

        Context.Items("Message1") = "Book added successfully."
        Server.Transfer("BookManagement.aspx")





Regards,
sandy


 
Old November 10th, 2006, 11:18 AM
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Default

If you intend to put null into fields when there is no valid value entered by the user, you will want to set that parameter to dbnull. The cleanest way to do this might be to write a function that checks that the string or date (or whatever) is entered, and returns the value when it does, and dbnull when it doesn't

Woody Z http://www.learntoprogramnow.com




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