How to handle 'The source contains no DataRows. ' error - asp.net

Question

please find below code.It will through an error 'The source contains no DataRow' if ithe row is empty..How to handle this ??
if (dtTemSec.Rows.Count > 0)
{
grdStepDetails.DataSource = dtTemSec.AsEnumerable()
.Where(x => x.Field<string>("Status") != "D" && x.Field<string>("ID") == "ST" && x.Field<int>("Folder") == folder)
.CopyToDataTable();
grdStepDetails.DataBind();
ClientScript.RegisterStartupScript(GetType(), "Val", "ShowStepPopup();", true);
}
else
{
grdStepDetails.DataSource = null;
grdStepDetails.DataBind();
ClientScript.RegisterStartupScript(GetType(), "Val", "ShowStepPopup();", true);
}

Answer 1

Use like this :-
if (dtTemSec.Rows.Count > 0)
{
var table = dtTemSec;
var rows = table.AsEnumerable().Where(x => x.Field<string>("Status") != "D" && x.Field<string>("ID") == "ST" && x.Field<int>("Folder") == folder);
var dt = rows.Any() ? rows.CopyToDataTable() : table.Clone();
grdStepDetails.DataSource = dt;
grdStepDetails.DataBind();
ClientScript.RegisterStartupScript(GetType(), "Val", "ShowStepPopup();", true);
}
else
{
grdStepDetails.DataSource = null;
grdStepDetails.DataBind();
ClientScript.RegisterStartupScript(GetType(), "Val", "ShowStepPopup();", true);
}

Answer 2

Use a If condition as below.
if(dtTemSec != null)
{
if(dtTemSec.Rows.Count > 0)
{
}
}
EDIT:
If that is the case, then put the condition after the Filter
if(dtTemSec != null)
{
if(dtTemSec.Rows.Count > 0)
{
DataTable Temp = new DataTable();
Temp = dtTemSec.AsEnumerable()
.Where(x => x.Field<string>("Status") != "D" && x.Field<string>("ID") == "ST" && x.Field<int>("Folder") == folder)
.CopyToDataTable();
if(Temp != null)
{
if(Temp.Rows.Count > 0)
{
grdStepDetails.DataSource=Temp;
grdStepDetails.DataBind();
ClientScript.RegisterStartupScript(GetType(), "Val", "ShowStepPopup();", true);
}
}
}
}