No Record Found

To display "No Record Found" when there are no records in your DataTable (dt), you can check if dt.Rows.Count is zero before building the table. If there are no rows, you can add a message to the placeholder instead. Here's how you can modify your code to include this check:

StringBuilder htmlTable = new StringBuilder();
htmlTable.Append("");
htmlTable.Append("");
htmlTable.Append("");

if (dt.Rows.Count == 0)
{
    // No records found
    htmlTable.Append("");
}
else
{
    int Count = 1;
    foreach (DataRow row in dt.Rows)
    {
        String Status = "Blocked";
        if (Convert.ToBoolean(row["status"]))
        {
            Status = "Active";
        }

        htmlTable.Append("");
        htmlTable.Append("");
        htmlTable.Append("");
        htmlTable.Append("");
        htmlTable.Append("");
        htmlTable.Append("");
        Count++;
    }
}

htmlTable.Append("");
htmlTable.Append("
Sr.
Name
Status
Action
No Record Found
" + Count.ToString() + "
" + row["description"] + "
" + Status + "
" + row["status"] + "
");
PlaceHolderTable.Controls.Add(new Literal { Text = htmlTable.ToString() });