I am creating/updating a record in sql db with a stored procedure. I am supplying around 30 parameters from my C# Data Access Layer. sql table has all the columns null able apart from its primary key column. here when i supply a null value to a null able column, it is throwing an exception of "Procedure or function 'spFullUpdate' expects parameter '@App1TAPAYears', which was not supplied.". In my c# code I can clearly see the column is supplied with a null value. Could please anyone tell me how I can rectify this issue. Following is my code snippet. Setting value to the data object is as follow
Dt.TimeAtPreviousAddressYears = int.TryParse(TimeatPreviousAddressYears.Text, out intOut) ? intOut : (int?)null;
following is the nullable property in my entity class
public int? TimeAtPreviousAddressYears { get; set; }
My data access layer adding parameter code is as follow
cmd.Parameters.Add("@App1TAPAYears", SqlDbType.Int).Value = dataObject.TimeAtPreviousAddressYears;
SqlDataAdapter da = new SqlDataAdapter(cmd);
conn.Open();
cmd.ExecuteNonQuery();
It can clearly be seen that the parameter is added and null value is supplied to a null able column but it still producing exception. Anyone's help will really be appreciated.
Kind Regardds
nullable != DBNull.Value
So you can't pass (int?)null
to the parameter value but instead pass DBNull.Value
Like:
if (dataObject.TimeAtPreviousAddressYears.HasValue)
{
cmd.Parameters.Add("@App1TAPAYears", SqlDbType.Int).Value =dataObject.TimeAtPreviousAddressYears;
}else
{
cmd.Parameters.Add("@App1TAPAYears", SqlDbType.Int).Value = DBNull.Value;
}
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