C# ImageUpload上载两次(使用AsyncFileUpload和AjaxControlToolkit)
我正在使用C# ImageUpload上载两次(使用AsyncFileUpload和AjaxControlToolkit),c#,asp.net,ajaxcontroltoolkit,image-uploading,asyncfileupload,C#,Asp.net,Ajaxcontroltoolkit,Image Uploading,Asyncfileupload,我正在使用AsyncFileUpload(AjaxControlToolkit)在控件中上载图像。问题是上载功能(AsyncFileUpload1\u UploadedComplete)同时在按钮单击和页面加载上运行,因此它会将同一图像上载两次 代码如下所示: 正面: <%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit" %> <script typ
AsyncFileUpload
(AjaxControlToolkit)在控件中上载图像。问题是上载功能(AsyncFileUpload1\u UploadedComplete
)同时在按钮单击和页面加载上运行,因此它会将同一图像上载两次
代码如下所示:
正面:
<%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit" %>
<script type="text/javascript">
function uploadComplete(sender, args) {
var pathForUploadedImage = $('#uploadedHiddenField').val();
$get("uploadImageImg").src = $('#uploadedHiddenField').val();
$(".uploadImage").fadeIn(100);
}
</script>
<asp:Image id="uploadImageImg" class="uploadImage" alt="" runat="server" ClientIDMode="Static" />
<div id="uploadedImageDiv"></div>
<asp:Image ID="loader" runat="server" ImageUrl="~/library/images/loading.gif" Style="display: None" />
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" />
<asp:AsyncFileUpload ID="AsyncFileUpload1" runat="server" ClientIDMode="Static" CssClass="asyncFileUpload" OnClientUploadComplete="uploadComplete" OnUploadedComplete="AsyncFileUpload1_UploadedComplete" CompleteBackColor="white" Width="65" />
<asp:HiddenField ID="uploadedHiddenField" ClientIDMode="Static" runat="server"/>
函数上载完成(发送方,参数){
var pathForUploadedImage=$('uploadedHiddenField').val();
$get(“uploadImageImg”).src=$(“#uploadedHiddenField”).val();
$(“.uploadImage”).fadeIn(100);
}
返回:
protected void AsyncFileUpload1_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e) {
try {
Styling.SetupStyles();
string virualFolder = "";
if (string.IsNullOrEmpty(UploadDirectory)) {
virualFolder = "/" + Styling.GetStyleValue("customNewsImagesFolder", "") + "/";
} else {
virualFolder = "/" + Styling.GetStyleValue(UploadDirectory, "") + "/";
}
string fileExtension = Path.GetExtension(e.FileName);
int fileSize = Convert.ToInt32(e.FileSize);
string physicalFolder = Server.MapPath(virualFolder);
string randomFileName = System.IO.Path.GetRandomFileName().Replace(".", "");
bool isUnique = true;
DirectoryInfo dir = new DirectoryInfo(MapPath(virualFolder));
FileInfo[] files = dir.GetFiles();
foreach (FileInfo myFile in files) {
if (myFile.Name == randomFileName) {
isUnique = false;
}
}
IsAllowedFileExtension(fileExtension);
bool error = false;
if (!isUnique) {
error = true;
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "tmp", "<script type='text/javascript'>alert('En fil med detta namn finns redan, var vänlig och döp om din fil');</script>", false);
} else if (!IsAllowedMaxFileSize(fileSize)) {
error = true;
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "tmp", "<script type='text/javascript'>alert('Filen är för stor, vänligen försök igen med en fil som är mindre än 2 MB');</script>", false);
} else if (!IsAllowedFileExtension(fileExtension)) {
error = true;
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "tmp", "<script type='text/javascript'>alert('Felaktigt filformat, vänligen försök igen med en fil av följande typ: .jpg .jpeg .png .gif');</script>", false);
}
if (!error) {
AsyncFileUpload1.SaveAs(physicalFolder + randomFileName + fileExtension);
string thePath = (virualFolder + randomFileName + fileExtension).Replace("\\", "/");
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), Guid.NewGuid().ToString(), "top.$get(\"" + uploadedHiddenField.ClientID + "\").value = '" + thePath + "';", true);
}
}
catch (Exception ex) {
erLog.LogException(ex, System.Reflection.MethodBase.GetCurrentMethod().Name);
}
}
private bool IsAllowedFileExtension(string fileExtension) {
bool valid = false;
if (fileExtension.ToLower() == ".jpg" || fileExtension.ToLower() == ".jpeg" || fileExtension.ToLower() == ".gif" || fileExtension.ToLower() == ".png")
valid = true;
return valid;
}
private bool IsAllowedMaxFileSize(int fileSize) {
bool valid = false;
if (fileSize < 2100000)
valid = true;
return valid;
}
protectedvoid AsyncFileUpload1\u UploadedComplete(对象发送方,AjaxControlToolkit.AsyncFileUploadEventArgs e){
试一试{
SetupStyles();
字符串virualFolder=“”;
if(string.IsNullOrEmpty(UploadDirectory)){
virualFolder=“/”+style.GetStyleValue(“customNewsImagesFolder”,”)+“/”;
}否则{
virualFolder=“/”+style.GetStyleValue(UploadDirectory)、“+”/”;
}
字符串fileExtension=Path.GetExtension(e.FileName);
int fileSize=Convert.ToInt32(e.fileSize);
字符串physicalFolder=Server.MapPath(virualFolder);
字符串randomFileName=System.IO.Path.GetRandomFileName().Replace(“.”,”);
bool isUnique=true;
DirectoryInfo dir=新的DirectoryInfo(映射路径(virualFolder));
FileInfo[]files=dir.GetFiles();
foreach(FileInfo myFile in files){
if(myFile.Name==randomFileName){
isUnique=false;
}
}
IsAllowedFileExtension(fileExtension);
布尔误差=假;
如果(!isUnique){
错误=真;
ScriptManager.RegisterClientScriptBlock(this.Page,this.GetType(),“tmp”,“警报('En fil med detta nam finns redan,var vänlig och döp om din fil');”,false);
}如果(!IsAllowedMaxFileSize(fileSize))则为else{
错误=真;
ScriptManager.RegisterClientScriptBlock(this.Page,this.GetType(),“tmp”,“alert('Filenär för stor,vänligen förök igen med en fil somär mindreän 2MB');,false);
}如果(!IsAllowedFileExtension(fileExtension)){
错误=真;
ScriptManager.RegisterClientScriptBlock(this.Page,this.GetType(),“tmp”,“alert('Felaktigt filformat,vänligen försök igen med en fil av följande typ:.jpg.jpeg.png.gif');,false);
}
如果(!错误){
AsyncFileUpload1.SaveAs(物理文件夹+随机文件名+文件扩展名);
字符串thePath=(virualFolder+randomFileName+文件扩展名)。替换(“\\”,“/”;
ScriptManager.RegisterClientScriptBlock(this,this.GetType(),Guid.NewGuid().ToString(),“top.$get(\”“+uploadedHiddenField.ClientID+“\”)。值=“+thePath+”;”,true);
}
}
捕获(例外情况除外){
LogException(例如,System.Reflection.MethodBase.GetCurrentMethod().Name);
}
}
私有bool是允许的文件扩展名(字符串文件扩展名){
bool valid=false;
如果(fileExtension.ToLower()=”.jpg“| | fileExtension.ToLower()=”.jpeg“| | fileExtension.ToLower()=”.gif“| | fileExtension.ToLower()=”.png”)
有效=真;
返回有效;
}
私有bool被允许最大文件大小(int fileSize){
bool valid=false;
如果(文件大小<2100000)
有效=真;
返回有效;
}