动态添加、删除附件

动态添加、删除附件
js代码:
//attAchments是一个table的ID
<script language="javascript">
function AddAttachments()
{

document.getElementById('attach').innerText = "继续添加附件";
tb = document.getElementById('attAchments');
newRow = tb.insertRow();
newRow.insertCell().innerHTML = "<input name='File' size='50' type='file'>  <input type=button value='删除' onclick='delFile(this.parentElement.parentElement.rowIndex)'>";
}
function delFile(index)
{
document.getElementById('attAchments').deleteRow(index);
tb.rows.length > 0?document.getElementById('attach').innerText = "继续添加附件":document.getElementById('attach').innerText = "继续添加附件";
}
</script>
页面:
<form id="form1" runat="server" enctype="multipart/form-data">

C#方法
//
public void UploadFile(HttpRequest Request, System.Web.UI.Page ThisPage)
{
for (int i = 0; i < Request.Files.Count; i++)
{
if (Request.Files[i].FileName != "")//Add images to WorkGuideFile file
{
string RandomString = Convert.ToString(Guid.NewGuid());
string TrueName = Path.GetFileName(Request.Files[i].FileName);
int j = TrueName.LastIndexOf(".");
string ExtendName = TrueName.Substring(j);
string RandomName = RandomString + ExtendName;
string filepath = ThisPage.Server.MapPath("~/DownloadFiles/article/" + RandomName);
Request.Files[i].SaveAs(filepath);
ArticleDataAccess.Article_ArticleAccessoriesAdd(TrueName, RandomName);
}
}
}