Forms Data Controls :: Invalid Attempt To Read When No Data Is Present?

Dec 5, 2010

here, i want to read the data for sql table, but there has error occur. "Invalid attempt to read when no data is present."

protected void DropDownListSelectDateYYYY_SelectedIndexChanged(object sender, EventArgs e)
{
Session["selectDate"] = Session["month"].ToString() + '/' + Session["day"].ToString() + '/' + DropDownListSelectDateYYYY.SelectedValue.ToString();
System.Diagnostics.Debug.Print(Session["selectDate"].ToString());
}

string sqlstr = "select * from ATTENDANCE where staff_Name = '" + LabelEmpSelected.Text.Trim() + "'and attendance_Date = '" + Session["selectDate"] + "' ";

whic session["selectDate"] cann't match to the database column data which is mm/dd/yyyy

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