Question

when I want to retrieve date from access , I get an exception error “No Value given for one or more parameters” at cmd1.ExecuteReader. This is my code

void checking_fields()
    {

        OleDbCommand cmd = new OleDbCommand("select movie_id from event", oc);
        OleDbDataReader ol = cmd.ExecuteReader();
        OleDbCommand cmd1 = new OleDbCommand("select [open date],[close date] from event", oc);
        OleDbDataReader ol1 = cmd1.ExecuteReader();
        while (ol1.Read())
        {
            if (ol1.GetValue(0).ToString() == dateTimePicker1.Value.ToString("MM/dd/yyyy") || 
                ol1.GetValue(1).ToString() == dateTimePicker2.Value.ToString("MM/dd/yyyy"))
                goto abc;
        }
        ol.Read();

        if (textBox1.Text.Equals(ol.GetString(0)))
            label8.Text = "ID already exists";
        else
        {
            insert_database();
            clear();
            this.Close();
        }
        abc:  label8.Text = "Open date or Close date already assigned";
        }

These are the properties of open date and close date

required:no,
indexed:yes(no duplicates),
ime_mode:no_control,
text_align:center,
show_date_picker:for_dates

since I am new to c#, please help me

Answer 1

You don’t have any parameters in your query.
This means that one or more of your field names
Open Date or Close Date
didn’t exist in your table event