Question

I have a SQL Server with a roster/information. I would like to update the table with situps, pushups, and Id. I know how to insert information into a table, but having trouble with the Update part of it.

Here is my code:

SqlConnection conns = new SqlConnection(ConfigurationManager.ConnectionStrings["TestDBConnectionString1"].ConnectionString);
SqlCommand cmd = new SqlCommand("UPDATE test SET SitUps = @SitUps, pushUps = @pushUps WHERE (Id = @Id)", conns);
cmd.CommandType = CommandType.Text;

Label sitL = ((Label)FormView2.FindControl("SitUpsLabel"));
Label pushL = ((Label)FormView2.FindControl("pushUpsLabel"));
Label IdL = ((Label)FormView2.FindControl("IdLabel"));

cmd.Parameters.AddWithValue("@SitUps", sitL.Text);
cmd.Parameters.AddWithValue("@pushUps", pushL.Text);
cmd.Parameters.AddWithValue("@Id", IdL.Text);

I’m getting this error

System.NullReferenceException: Object reference not set to an
instance of an object.

I’m pretty sure it’s the way I’m treating the Id value. Thanks in advance!!

Answer 1

1. Ensure that the 3 id that you stated there, “SitUpsLabel”, “pushUpsLabel” and “IdLabel” is the same as what you have on the form view.

2. I noticed that “IdL” color is odd, try using other variable name instead. You could be using “IdL” for some other purposes.