DotNet OnPreRender(EventArgs e) 事件常用的方法

protected override void onprerender(eventargs e)
1) 加入脚本

protected override void onprerender(eventargs e)
{
base.onprerender(e);
this.page.registerclientscriptblock("inserttext", this.renderscript());
this.page.registeronsubmitstatement("storepostbody", "storepostbody();");
}

2) 设定标题

protected override void onprerender(eventargs e)
{
if(_maintitle != null)
_maintitle.text = resourcemanager.getstring(title);
if(_subtitle != null)
_subtitle.text = resourcemanager.getstring(subtitle);
base.onprerender (e);
}

3) 设定按钮客户端事件

protected override void onprerender(eventargs e)
{
submit.attributes.add("onclick", "return submitsendtofriend('" + from.clientid + "', '" + to.clientid + "');");
}

4) 设定控件的状态

protected override void onprerender(system.eventargs e)
{
if(replybutton.visible == false)
((literal)findcontrol("sep1")).visible = false;
if(threadsubbutton.visible == false)
((literal)findcontrol("sep3")).visible = false;
if(ratebutton.visible == false)
((literal)findcontrol("sep2")).visible = false;
base.onprerender (e);
}

5) 加入脚本块

protected override void onprerender(eventargs e)
{
base.onprerender (e);
stringbuilder sb = new stringbuilder();
sb.append(" ");
sb.append(" function toggleratemenu() {");
sb.append(" ratemenu = document.getelementbyid('ratemenu');");
sb.append(" ratebutton = document.getelementbyid('ratebutton');");
sb.append("");
sb.append(" ratemenu.style.left = getposoffset(ratebutton, \"left\");");
sb.append(" ratemenu.style.top = getposoffset(ratebutton, \"top\") + ratebutton.offsetheight;");
sb.append("");
sb.append(" if (ratemenu.style.visibility == \"hidden\") {");
sb.append(" ratemenu.style.visibility = \"visible\";");
sb.append(" ratemenu.style.display = 'block';");
sb.append(" } else {");
sb.append(" ratemenu.style.visibility = \"hidden\";");
sb.append(" ratemenu.style.display = 'none';");
sb.append(" }");
sb.append(" }");
sb.append(" ");
sb.append(" function getposoffset(what, offsettype){");
sb.append(" var totaloffset=(offsettype==\"left\")? what.offsetleft : what.offsettop;");
sb.append(" var parentel=what.offsetparent;");
sb.append(" while (parentel!=null){");
sb.append(" totaloffset=(offsettype==\"left\")? totaloffset+parentel.offsetleft : totaloffset+parentel.offsettop;");
sb.append(" parentel=parentel.offsetparent;");
sb.append(" }");
sb.append(" return totaloffset;");
sb.append("}");
sb.append(" ");
page.registerclientscriptblock("ratepost",sb.tostring());