ASP.NET C# ODBC Select query is returning truncated result string

Hello all,

I am trying to populate a drop down list with a database query in an ASP.NET project. My problem is that the result values from the query are being truncated at 15 characters, and I don't know why this would be.

I am using System.Data.ODBC.

I am creating my database connection using OdbcConnection("SYSTEM_DSN");
OdbcConnection cxconn = new OdbcConnection("DSN=SYSTEMDSN");

My query is in a string:
//build the select statement to get items to populate session drop-down
string ProgramQuery = "SELECT major_table.txt_adm from major_table where major_table.dept = 'EXCL' ";
ProgramQuery += "and major_table.web_display = 'Y' and major_table.inactive_date is NULL;";

And this is how I execute the query and populate my drop-down:
 OdbcCommand cxcommand = cxconn.CreateCommand();
            cxcommand.CommandText = ProgramQuery;

                OdbcDataReader dbreader = cxcommand.ExecuteReader();
                // rest of the code to process the result set
                int fCount = dbreader.FieldCount;
                while (dbreader.Read())
                    for (int i = 0; i < fCount; i++)
                        Response.Write(" " + dbreader.GetValue(i));



                //close the dbreader

                //bind the data on ddlSess and set the selected value by default to be the first one.
                ddlProg.SelectedIndex = 0;


The resulting values in the drop down list are truncated at 15 characters. So, "Business Administration" becomes "Business Admini". I am unable to figure out why this is the case. My database is an INFORMIX database and I have the system DSN created using the INFORMIX 3.80 32 BIT driver.

Any help would be really appreciated. Thanks for looking into this.

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Todd GerbertIT ConsultantCommented:
I would guess simply that the drop down list isn't wide enough; the values are not being truncated, but all the characters cannot be shown. Is the width of the drop-down list explicity specified in the <asp:DropDownList> tag?
gcampbell1Author Commented:
Thanks for your reply.

No, the width is  not the issue. I tried to expand the dropdownlist width, and the values were still truncated. I don't think this is a problem with the drop down list because the "Response.Write" line in the for loop prints out the truncated value as well.

I am not sure if it is an OdbcDataReader issue or an informix driver issue, but those two would be my guesses as problem areas. I just don't know where to even start looking.
Todd GerbertIT ConsultantCommented:
I don't think I see anything in your code that would cause that behavior - is the column in the Informix database defined as 15 characters wide (the MS SQL equivelant of char(15))?
gcampbell1Author Commented:
Thanks, again, for the reply. The database was not the problem either (since the value is stored properly on the database end).

I realized the problem was the INFORMIX 3.80 driver for the System DSN. I tried using the 3.34 driver and the string is no longer getting truncated.


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