我正在使用数据阅读器运行if else语句来查询表格数据并在页面上激活/停用一些控件。我实现了一个using语句,在关闭块时自动关闭连接和读取器,但是每次执行if else语句时仍然会出现读取器已关闭的错误。还缺少什么?代码如下:
string comnt = "SELECT StatusId FROM Submission WHERE SubmissionId =" + x;
using (SqlConnection editConn = new SqlConnection(connectionString))
{
editConn.Open();
using (SqlCommand statCmd = new SqlCommand(comnt, editConn))
{
SqlDataReader dr = statCmd.ExecuteReader();
dr.Read();
if (dr.GetInt32(0) > 0)
{
PanelComment.Visible = true;
PanelQuote.Visible = false;
LnbFid.Visible = false;
LnbCrim.Visible = false;
LnbEo.Visible = false;
LnbEpl.Visible = false;
LnbNot.Visible = false;
LnbPriv.Visible = false;
LnbPub.Visible = false;
}
else
{
PanelComment.Visible = false;
}
}