在网速慢或者网站反应慢的情况下,如果提交表单需要超过5秒的时间还未提交成功,多数人会重新点击提交。这样不仅造成错误的数据,还会加剧服务器的压力。
<httpModules>
<!--防止重复提交 LOG记录MODULE -->
<add name="NonReduplicatePostModule" type="tests.NonReduplicatePostModule,test"/>
</httpModules>
Evlon = {};
Evlon.MaskDiv = function()
{
var div = window.document.createElement("DIV");
div.style.position = "absolute";
div.style.top = "0px";
div.style.left = "0px";
div.style.width = '100%';//document.body.scrollWidth + 'px';
div.style.height = '100%'; //document.body.scrollHeight + 'px';
div.style.backgroundColor = "white";
div.style.zIndex = 999;
div.style.filter = "Alpha(style=0,opacity=50)";
div.style.opacity="0.50";
this.divMask = div;
div = window.document.createElement("DIV");
div.style.position = "absolute";
div.style.top = "0px";
div.style.left = "0px";
div.style.width = '100%';//document.body.scrollWidth + 'px';
div.style.height = '100%'; //document.body.scrollHeight + 'px';
div.style.zIndex = 1000;
this.divTooltip = div;
{
//创建半透明DIV
window.__maskDiv__ = document.body.insertAdjacentElement('afterBegin',this.divMask);
//创建提示DIV
window.__maskDivText__ = document.body.insertAdjacentElement('afterBegin',this.divTooltip);
window.__maskDivText__.innerHTML = "<table style='border-collapse:collapse;border-width:0px;width:100%;height:100%;'0><tr height='38%'><td></td></tr><tr><td align='center' valign='top'>" +
"<table style='border-collapse:collapse;border:solid 1px yellow;'><tr><td align='right'><img width='20' height='20' src='image/loading.gif' usesrc='image/loading.gif' onerror='this.src= this.usesrc = \"../\" + this.usesrc'/></td>" +
"<td align='left'><span style = 'filter:alpha(opacity=100);background-color:#ccc;font-size:20px'>提交中.</span></td></tr></table>" +
"</td></tr></table>";
{
if(window.__maskDiv__ != null)
{
document.body.removeChild(window.__maskDiv__);
window.__maskDiv__ = null;
}
if(window.__maskDivText__ != null)
{
window.__maskDivText__.innerHTML = '';
document.body.removeChild(window.__maskDivText__);
window.__maskDivText__ = null;
}
}
}
{
var sign = window.showModalDialog(sURL , vArguments, sFeatures);
if(sign != "" && sign != null)
{
//创建半透明DIV
Evlon.MaskDiv.Instance.show();
}
return null;
//return sign;
}
通过使用HttpModule,我们可以在表单处理前,检测一些标志,从而防止用户重复提交数据,再通过一些接口,让用户自己来处理重复提交时,应该如何告诉用户。
通过使用HttpModule,我们也可以在客户端表单提交时,使用DIV覆盖住表单,从UI层防止用户再次单击提交(用户直接F5管不了)。
这种方法使用简单,直接把脚本和图片放在指定的目录中,然后在Web.config中添加Module
<httpModules>
<!--防止重复提交 LOG记录MODULE -->
<add name="NonReduplicatePostModule" type="tests.NonReduplicatePostModule,test"/>
</httpModules>
下面是实现代码:
Code
用到的JS文件:/js/MaskDIV.js
Evlon = {};
Evlon.MaskDiv = function()
{
var div = window.document.createElement("DIV");
div.style.position = "absolute";
div.style.top = "0px";
div.style.left = "0px";
div.style.width = '100%';//document.body.scrollWidth + 'px';
div.style.height = '100%'; //document.body.scrollHeight + 'px';
div.style.backgroundColor = "white";
div.style.zIndex = 999;
div.style.filter = "Alpha(style=0,opacity=50)";
div.style.opacity="0.50";
this.divMask = div;
div = window.document.createElement("DIV");
div.style.position = "absolute";
div.style.top = "0px";
div.style.left = "0px";
div.style.width = '100%';//document.body.scrollWidth + 'px';
div.style.height = '100%'; //document.body.scrollHeight + 'px';
div.style.zIndex = 1000;
this.divTooltip = div;
this.show = function()
{
//创建半透明DIV
window.__maskDiv__ = document.body.insertAdjacentElement('afterBegin',this.divMask);
//创建提示DIV
window.__maskDivText__ = document.body.insertAdjacentElement('afterBegin',this.divTooltip);
window.__maskDivText__.innerHTML = "<table style='border-collapse:collapse;border-width:0px;width:100%;height:100%;'0><tr height='38%'><td></td></tr><tr><td align='center' valign='top'>" +
"<table style='border-collapse:collapse;border:solid 1px yellow;'><tr><td align='right'><img width='20' height='20' src='image/loading.gif' usesrc='image/loading.gif' onerror='this.src= this.usesrc = \"../\" + this.usesrc'/></td>" +
"<td align='left'><span style = 'filter:alpha(opacity=100);background-color:#ccc;font-size:20px'>提交中.</span></td></tr></table>" +
"</td></tr></table>";
}
{
if(window.__maskDiv__ != null)
{
document.body.removeChild(window.__maskDiv__);
window.__maskDiv__ = null;
}
if(window.__maskDivText__ != null)
{
window.__maskDivText__.innerHTML = '';
document.body.removeChild(window.__maskDivText__);
window.__maskDivText__ = null;
}
}
}
Evlon.MaskDiv.Instance
= new Evlon.MaskDiv();window.showModalDialogMask
= function(sURL , vArguments, sFeatures){
var sign = window.showModalDialog(sURL , vArguments, sFeatures);
if(sign != "" && sign != null)
{
//创建半透明DIV
Evlon.MaskDiv.Instance.show();
}
return null;
//return sign;
}
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