Lodop6 以上打印控件使用，详参考自带说明文档，打印样式及文字大小要特殊设置一下

    <link href="../css/cssprint.css" rel="stylesheet" />
    <script src="../Lodop/LodopFuncs.js"></script>
    <style id="style1">
table {
    font-size: 9pt;
    font-weight: normal;
    color: #000000 ;
    text-decoration: none;
}
td {
    font-size: 9pt;
    font-weight: normal;
    color: #000000 ;
    text-decoration: none;
}
.printfont{
    
    font-size: 9pt;
    font-weight: normal;
    color: #000000 ;
    text-decoration: none;
    
}
</style>

<script  type="text/javascript">
        var LODOP; //声明为全局变量
       
        function PreviewMytable() {
            LODOP = getLodop();
            LODOP.PRINT_INIT("预览打印表格");
            LODOP.SET_PRINT_PAGESIZE(2, 0, 0, "A4");

            LODOP.ADD_PRINT_TEXT(10, 410, 300, 30, "国  电  吉  林  热  电  厂")
            LODOP.SET_PRINT_STYLEA(0, "ItemType", 1);
            LODOP.SET_PRINT_STYLEA(0, "FontSize", 14);
            LODOP.SET_PRINT_STYLEA(0, "Bold", 1);

            LODOP.ADD_PRINT_TEXT(60, 20, 550, 50, "单位：<%=DropDownList1.SelectedItem.Text.ToString()%> (<%=numPerson%>人)")
            LODOP.SET_PRINT_STYLEA(0, "ItemType", 1);
            LODOP.SET_PRINT_STYLEA(0, "FontSize", 12);
            LODOP.SET_PRINT_STYLEA(0, "Bold", 1);

            LODOP.ADD_PRINT_TEXT(55, 370, 550, 50, "<%=DropDownList3.SelectedItem.Text.ToString()%> 年 <%=DropDownList4.SelectedItem.Text.ToString()%> 月 份 考 勤 记 录 簿")
            LODOP.SET_PRINT_STYLEA(0, "ItemType", 1);
            LODOP.SET_PRINT_STYLEA(0, "FontSize", 16);
            LODOP.SET_PRINT_STYLEA(0, "Bold", 1);

            LODOP.ADD_PRINT_TEXT(60, 800, 150, 30, "<%=DropDownList3.SelectedItem.Text.ToString()%>年 <%=DropDownList4.SelectedItem.Text.ToString()%>月<%=monthLastDay%>日")
            LODOP.SET_PRINT_STYLEA(0, "ItemType", 1);
            LODOP.SET_PRINT_STYLEA(0, "FontSize", 12);
            LODOP.SET_PRINT_STYLEA(0, "Bold", 1);

            LODOP.ADD_PRINT_TEXT(740, 80, 250, 30, "注：出勤“/”，串休“φ”。")
            LODOP.SET_PRINT_STYLEA(0, "ItemType", 1);
            LODOP.SET_PRINT_STYLEA(0, "FontSize", 10);
            LODOP.SET_PRINT_STYLEA(0, "Bold", 0);


            LODOP.ADD_PRINT_TEXT(740, 510, 120, 30, "单位领导：")
            LODOP.SET_PRINT_STYLEA(0, "ItemType", 1);
            LODOP.SET_PRINT_STYLEA(0, "FontSize", 10);
            LODOP.SET_PRINT_STYLEA(0, "Bold", 0);

            LODOP.ADD_PRINT_TEXT(740, 850, 120, 30, "考勤员：")
            LODOP.SET_PRINT_STYLEA(0, "ItemType", 1);
            LODOP.SET_PRINT_STYLEA(0, "FontSize", 10);
            LODOP.SET_PRINT_STYLEA(0, "Bold", 0);

            var strBodyStyle = "<style>" + document.getElementById("style1").innerHTML + "</style>";
            var strFormHtml = strBodyStyle + "<body>" + document.getElementById("div1").innerHTML + "</body>";
            LODOP.ADD_PRINT_TABLE(80, 15, "28cm", "17cm", strFormHtml);
            LODOP.SET_PRINT_STYLEA(0, "TableHeightScope",1);
            LODOP.PREVIEW();
        };
       
</script>

关键这句

var strBodyStyle = "<style>" + document.getElementById("style1").innerHTML + "</style>";
var strFormHtml = strBodyStyle + "<body>" + document.getElementById("div1").innerHTML + "</body>";

把样式带进来

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原文地址：https://www.cnblogs.com/tiger8000/p/3700941.html