Gridview header footer 고정하기

header style css 추가

.HeaderFreezing
{
background-color:White;
position:relative ;
top: expression(this.offsetParent.scrollTop);
z-index: 10;
}

.FooterFreezing
{
background-color:White;
position:relative;
bottom: expression(this.offsetParent.scrollHeight - (this.offsetParent.scrollTop + this.offsetParent.offsetHeight));
z-index: 10;
}

.FreezingFooter {
position:relative;
bottom: expression((this.offsetParent.offsetWidth != this.offsetParent.clientWidth) ? (this.offsetParent.scrollHeight - (this.offsetParent.scrollTop + this.offsetParent.offsetHeight)) : 0);
background-color:White;
z-index: 200;
}

[출처] 그리드 헤더/풋터 고정하기 Gridview header footer 고정하기|작성자 바르