Question

I’m trying to use SQL Functions with SQLDataAdabter, but when i run my application i get this exception :

Object reference not set to an instance of an object

in that line :

adbtr.SelectCommand.CommandType = CommandType.Text;

And when i remove that line, i get the same exception but in the line after:

adbtr.SelectCommand.CommandText = "SELECT * FROM Select_gallery_names_FN()";

Here’s my code :

protected void Page_Load(object sender, EventArgs e)
{

    DataSet dst = new DataSet();
    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString))
    {
        SqlDataAdapter adbtr = new SqlDataAdapter();
        adbtr.SelectCommand.CommandType = CommandType.Text;
        adbtr.SelectCommand.CommandText = "SELECT * FROM Select_gallery_names_FN()";
        try
        {
            int result = adbtr.Fill(dst);
            if (result == 0)
            {
                return;
            }
            cat_repeater.DataSource = dst;
            cat_repeater.DataBind();
        }
        catch(Exception ex)
        {
            Response.Write(ex.Message);
        }

    }

Any help would be appreciated. Thanks.

Answer 1

You need to initialize the SelectCommand.. it is null at the time you’re setting properties on it:

SqlDataAdapter adbtr = new SqlDataAdapter();
adbtr.SelectCommand = new SqlCommand("SELECT * FROM Select_gallery_names_FN()");
adbtr.SelectCommand.CommandType = CommandType.Text;