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/// <summary>
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/// 保存div与页面滚动条的位置
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/// </summary>
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/// <param name="divId">DIV的ID数组</param>
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public static void RetainScrollPosition(string[] divId)
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{
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System.Web.UI.Page page=(Page)HttpContext.Current.Handler;
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string saveScrollPosition = "";
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string setScrollPosition = "";
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string saveScrollPositionDiv = "";
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string setScrollPositionDiv = "";
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#region 保存页面滚动条的状态
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page.RegisterHiddenField("__SCROLLPOS_TOP","0");
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page.RegisterHiddenField("__SCROLLPOS_LEFT","0");
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saveScrollPosition = "document.forms[0].__SCROLLPOS_TOP.value = {0}.scrollTop;document.forms[0].__SCROLLPOS_LEFT.value = {0}.scrollLeft;";//}{0}.onscroll=saveScrollPosition;</script>";
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setScrollPosition = "{0}.scrollTop ='{1}';{0}.scrollLeft ='{2}';";//}{0}.onload=setScrollPosition;</script>";
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saveScrollPosition = string.Format(saveScrollPosition,"window.document.body");
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setScrollPosition = string.Format(setScrollPosition,"window.document.body", page.Request.Form["__SCROLLPOS_TOP"],page.Request.Form["__SCROLLPOS_LEFT"]);
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#endregion
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#region 保存divId的位置
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for (int i = 0; i < divId.Length; i++)
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{
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page.RegisterHiddenField(divId[i].ToString() + "_TOP","0");
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page.RegisterHiddenField(divId[i].ToString() + "_LEFT","0");
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saveScrollPositionDiv = "<script language='javascript'>function saveScrollPosition" + divId[i].ToString() + "() {{document.all('" + divId[i].ToString() + "_TOP').value = {0}.scrollTop;document.all('" + divId[i].ToString() + "_LEFT').value = {0}.scrollLeft;}}{0}.onscroll=saveScrollPosition" + divId[i].ToString() + ";</script>";
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setScrollPositionDiv += "{0}.scrollTop = {1};{0}.scrollLeft = {2};";
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saveScrollPositionDiv = string.Format(saveScrollPositionDiv,"window.document.all('" + divId[i].ToString() + "')");
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page.RegisterStartupScript("saveScroll" + divId[i].ToString(), saveScrollPositionDiv);
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setScrollPositionDiv = string.Format(setScrollPositionDiv,"window.document.all('" + divId[i].ToString() + "')", page.Request.Form[divId[i].ToString() + "_TOP"],page.Request.Form[divId[i].ToString() + "_LEFT"]);
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}
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#endregion
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#region 注册客户端脚本
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saveScrollPosition = "<script language='javascript'>function saveScrollPosition() {{" + saveScrollPosition + "}}{0}.onscroll=saveScrollPosition;</script>";
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page.RegisterStartupScript("saveScroll", string.Format(saveScrollPosition,"window.document.body"));
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if(page.IsPostBack)
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{
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setScrollPosition = "<script language='javascript'>function setScrollPosition() {{" + setScrollPosition + setScrollPositionDiv + "}}{0}.onload=setScrollPosition;</script>";
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page.RegisterStartupScript("setScroll", string.Format(setScrollPosition,"window.document.body"));
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//page.RegisterStartupScript("setScrollDocument", string.Format(setScrollPosition,"window.document.body", page.Request.Form["__SCROLLPOS_TOP"],page.Request.Form["__SCROLLPOS_LEFT"]));
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}
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#endregion
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}
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