Question

I’m converting a project to use ObjectDataSources instead of SqlDataSources. I’m using text boxes for user input of dates. When these were left blank with a SqlDataSource, the value sent to the stored procedure was null, allowing me to get the right results from a query with no date specified.

With the ObjectDataSource, a blank input to the date text boxes gets converted to 01/01/0001 00:00:00, which is not acceptable for the query.

Anyone know how I can receive a null value for this parameter on my ObjectDataSource when the textbox is left empty?

thanksHi

Answer 1

I found a way to do this, by checking for mindate inline and replacing with null. Feels a bit hacky, but it works fine, and I can’t find any other suggestions. If you have a better idea, please let me know!

cmd.Parameters.AddWithValue("@ABCId", objectType == "AbcId" ? objectId.ToString() : null);
            cmd.Parameters.AddWithValue("@CounterpartyId", objectType == "CounterpartyId" ? objectId.ToString() : null);
            cmd.Parameters.AddWithValue("@FromDate", fromDate == DateTime.MinValue ? null : fromDate.ToLongDateString());
            cmd.Parameters.AddWithValue("@ToDate", toDate == DateTime.MinValue ? null : toDate.ToLongDateString());
            cmd.Parameters.AddWithValue("@RelationshipId", objectType == "RelId" ? objectId.ToString() : null);
            cmd.Parameters.AddWithValue("@ShowNonTradePayments", showNonTradePayments);
            cmd.Parameters.AddWithValue("@ShowTradePayments", showTradePayments);