我有一个脚本可以将文件上传到页面。另外,我有一个自定义控件对此负责。在此CC中,有以下代码:
<div style="height:0px;overflow:hidden">
<input type="file"
id="${javascript:compositeData.ID+'_files_input'}"
onchange="#{javascript:
var currentCustomID = compositeData.ID;
var filesInput = '\'' + currentCustomID + '_files_input' + '\'';
var filesUpload = '\'' + currentCustomID + '_files_upload' + '\'';
var filesButton = '\'' + currentCustomID + '_files_button' + '\'';
var filesProgress = '\'' + currentCustomID + '_files_progress' + '\'';
return 'files_onchange(' + filesInput + ',' + filesUpload + ',' + filesButton + ',' + filesProgress + ')';
}"
multiple="true" uploadOnSelect="true" name="uploadedfile" />
<xp:fileUpload
id="${javascript:compositeData.ID+'_files_upload'}"
useUploadname="true">
<xp:this.value><![CDATA[#{doc_source[compositeData.FieldName]}]]></xp:this.value>
</xp:fileUpload>
<xp:button value="Refresh"
id="${javascript:compositeData.ID+'_files_button'}">
<xp:eventHandler event="onclick" submit="true"
refreshMode="partial" refreshId="${javascript:compositeData.ID+'refresh'}" disableValidators="true"
>
<xp:this.action>
<xp:actionGroup>
<xp:saveDocument></xp:saveDocument>
<xp:executeScript>
<xp:this.script><![CDATA[#{javascript:
if (compositeData.postUpload!=null)
{
compositeData.postUpload.getScript().invoke(facesContext, null)
}}]]></xp:this.script>
</xp:executeScript>
</xp:actionGroup>
</xp:this.action>
</xp:eventHandler>
</xp:button>
</div>
代码非常简单。在输入块中,有一个onchange属性,该属性调用称为files_onchange(filesInputP, filesUploadP, filesButtonP, filesProgressP)
的客户端函数(该函数的参数只是应该更新的DOM元素。它使该函数具有多功能性,可以多次使用)。
该函数本身如下:
function files_onchange(filesInput, filesUpload, filesButton, filesProgress)
{
var urfiles = document.getElementById(filesInput).files;
files_upload(filesInput, filesUpload, urfiles, 0, filesButton, filesProgress);
}
function files_upload(filesInput, uploadID, files, counter, refreshID, filesProgress)
{
var url = window.location.href;
var formData = new FormData();
var file = null;
var form = XSP.findForm(filesInput);
//console.log(form);
if (!files) return;
var numberOfFiles = files.length;
file = files[counter];
var max = files.length;
if (counter >= max) return;
formData.append(document.querySelector('[id$=' + uploadID + ']').id, file);
formData.append("$$viewid", dojo.query("input[name='$$viewid']")[0].value);
formData.append("$$xspsubmitid", dojo.query("input[name='$$xspsubmitid']")[0].value);
formData.append("$$xspsubmitvalue", dojo.query("input[name='$$xspsubmitvalue']")[0].value);
formData.append("$$xspsubmitscroll", dojo.query("input[name='$$xspsubmitscroll']")[0].value);
formData.append(form.id, form.id);
console.log(form.id);
var xhr = new XMLHttpRequest();
/* event listners */
xhr.upload.addEventListener("progress", function(e)
{
if (e.lengthComputable)
{
var percentComplete = Math.round(e.loaded * 100 / e.total);
document.getElementById(filesProgress).innerHTML = percentComplete.toString()+'%, ( '+(counter+1).toString()+' / '+numberOfFiles.toString()+' )';
}
else
{
document.getElementById(filesProgress).innerHTML = '...';
}
}, false);
xhr.addEventListener("load", function()
{
counter++;
if (counter >= max)
{
document.getElementById(filesInput).value = "";
if (refreshID)
{
console.log(refreshID);
console.log(document.querySelector('[id$=' + refreshID + ']'));
document.querySelector('[id$=' + refreshID + ']').click(); // Here's the problem
}
}
else
{
files_upload(filesInput, uploadID, files, counter, refreshID, filesProgress)
}
}, false);
xhr.addEventListener("error", function(e)
{
document.getElementById(filesProgress).innerHTML = "Error: "+e;
}, false);
xhr.addEventListener("abort", function()
{
document.getElementById(filesProgress).innerHTML = "Upload cancelled.";
}, false);
xhr.open("POST", url, true);
xhr.send(formData);
// document.querySelector('[id$=' + refreshID + ']').click();
document.querySelector('[id$=' + uploadID + ']').value = '';
}
它工作得很好,但是如果将fileComponent放在 rendered 块中,则会非常棘手。确实会将文件上传到文档。但是,如果我尝试单击刚刚上传的文件,则服务器会显示404错误。
问题是document.querySelector('[id$=' + refreshID + ']').click();
侦听器中的代码load
无法在具有动态渲染属性的块中执行。单击后,将执行id="${javascript:compositeData.ID+'_files_button'}"
中的操作,因此,我必须手动执行相同的单击。
基本上,refreshID元素只是一个用于保存文档的按钮。
尽管页面上存在带有'_files_button'
的元素,但是除非我手动调用该函数,否则它不会起作用。完成后,一切正常。有什么问题?预先感谢