这个想必是大家经常遇到的,嘿嘿,估计大家会想要吧。
当页面postback以后,浏览的位置就跑到页面的顶部了,如果是一个很长的页面,客户就要拖来拖去,很不方便,下面是一个方法,可以记录浏览页面的位置,postback以后用script调整回去,
#region 防止页面滚动
private void RetainScrollPosition()
{
StringBuilder saveScrollPosition = new StringBuilder();
StringBuilder setScrollPosition = new StringBuilder();
RegisterHiddenField("__SCROLLPOS", "0");
saveScrollPosition.Append("<script language='javascript'>");
saveScrollPosition.Append("function saveScrollPosition() {");
saveScrollPosition.Append(" document.forms[0].__SCROLLPOS.value = mybody.scrollTop;");
saveScrollPosition.Append("}");
saveScrollPosition.Append("mybody.onscroll=saveScrollPosition;");
saveScrollPosition.Append("</script>");
RegisterStartupScript("saveScroll", saveScrollPosition.ToString());
if (Page.IsPostBack)
{
setScrollPosition.Append("<script language='javascript'>");
setScrollPosition.Append("function setScrollPosition() {");
setScrollPosition.Append(" mybody.scrollTop = " + Request["__SCROLLPOS"]+ ";");
setScrollPosition.Append("}");
setScrollPosition.Append("mybody.onload=setScrollPosition;");
setScrollPosition.Append("</script>");
RegisterStartupScript("setScroll", setScrollPosition.ToString());
}
}
#endregion
private void RetainScrollPosition()
{
StringBuilder saveScrollPosition = new StringBuilder();
StringBuilder setScrollPosition = new StringBuilder();
RegisterHiddenField("__SCROLLPOS", "0");
saveScrollPosition.Append("<script language='javascript'>");
saveScrollPosition.Append("function saveScrollPosition() {");
saveScrollPosition.Append(" document.forms[0].__SCROLLPOS.value = mybody.scrollTop;");
saveScrollPosition.Append("}");
saveScrollPosition.Append("mybody.onscroll=saveScrollPosition;");
saveScrollPosition.Append("</script>");
RegisterStartupScript("saveScroll", saveScrollPosition.ToString());
if (Page.IsPostBack)
{
setScrollPosition.Append("<script language='javascript'>");
setScrollPosition.Append("function setScrollPosition() {");
setScrollPosition.Append(" mybody.scrollTop = " + Request["__SCROLLPOS"]+ ";");
setScrollPosition.Append("}");
setScrollPosition.Append("mybody.onload=setScrollPosition;");
setScrollPosition.Append("</script>");
RegisterStartupScript("setScroll", setScrollPosition.ToString());
}
}
#endregion
使用方法:
body的ID改成mybody,page_load里头加上 RetainScrollPosition();