C# ImageUpload(AjaxControlToolKit和AsyncFileUpload)存在问题
我在使用AjaxControlToolKit时遇到问题。 我可以上传文件并显示它们,而无需回发,但如果用户改变主意并上传另一张图片,它仍然会显示第一张图片。如果您能提供帮助,我将不胜感激 这是我的代码: 正面:C# ImageUpload(AjaxControlToolKit和AsyncFileUpload)存在问题,c#,asp.net,ajaxcontroltoolkit,image-uploading,asyncfileupload,C#,Asp.net,Ajaxcontroltoolkit,Image Uploading,Asyncfileupload,我在使用AjaxControlToolKit时遇到问题。 我可以上传文件并显示它们,而无需回发,但如果用户改变主意并上传另一张图片,它仍然会显示第一张图片。如果您能提供帮助,我将不胜感激 这是我的代码: 正面: 函数上载完成(发送方,参数){ var pathForUploadedImage=$('uploadedHiddenField').val(); $get(“uploadImageImg”).src=$(“#uploadedHiddenField”).val(); $(“.upload
函数上载完成(发送方,参数){
var pathForUploadedImage=$('uploadedHiddenField').val();
$get(“uploadImageImg”).src=$(“#uploadedHiddenField”).val();
$(“.uploadImage”).fadeIn(100);
}
返回:
protected void AsyncFileUpload1_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
try
{
Styling.SetupStyles();
string virualFolder = "";
if (string.IsNullOrEmpty(UploadDirectory))
{
virualFolder = "/" + Styling.GetStyleValue("customNewsImagesFolder", "") + "/";
}
else
{
virualFolder = "/" + Styling.GetStyleValue(UploadDirectory, "") + "/";
}
string fileExtension = Path.GetExtension(e.FileName);
int fileSize = Convert.ToInt32(e.FileSize);
string physicalFolder = Server.MapPath(virualFolder);
string randomFileName = System.IO.Path.GetRandomFileName().Replace(".", "");
bool isUnique = true;
DirectoryInfo dir = new DirectoryInfo(MapPath(virualFolder));
FileInfo[] files = dir.GetFiles();
foreach (FileInfo myFile in files)
{
if (myFile.Name == randomFileName)
{
isUnique = false;
}
}
IsAllowedFileExtension(fileExtension);
bool error = false;
if (!isUnique)
{
error = true;
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "tmp", "<script type='text/javascript'>alert('En fil med detta namn finns redan, var vänlig och döp om din fil');</script>", false);
}
else if (!IsAllowedMaxFileSize(fileSize))
{
error = true;
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "tmp", "<script type='text/javascript'>alert('Filen är för stor, vänligen försök igen med en fil som är mindre än 2 MB');</script>", false);
}
else if (!IsAllowedFileExtension(fileExtension))
{
error = true;
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "tmp", "<script type='text/javascript'>alert('Felaktigt filformat, vänligen försök igen med en fil av följande typ: .jpg .jpeg .png .gif');</script>", false);
}
if (!error)
{
AsyncFileUpload1.SaveAs(physicalFolder + randomFileName + fileExtension);
string thePath = (virualFolder + randomFileName + fileExtension).Replace("\\", "/");
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "filePath", "top.$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)
{
尝试
{
SetupStyles();
字符串virualFolder=“”;
if(string.IsNullOrEmpty(UploadDirectory))
{
virualFolder=“/”+style.GetStyleValue(“customNewsImagesFolder”,”)+“/”;
}
其他的
{
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(),“filePath”,“top.$get(\“”+uploadedHiddenField.ClientID+“\”)。value='“+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;
}
我认为问题在于我正在用“ScriptManager.RegisterClient ScriptBlock”行显示图像,但如果脚本已经在DOM中,它似乎没有注册脚本。您没有指定AsyncFileUpload1\u UploadedComplete事件处理程序是否在控件或页面内。若无法解决您的问题,您可以尝试使用页面实例注册客户端脚本。另一个选项是在每次部分回发时生成唯一的脚本id 选项1(向页面实例注册客户端脚本): 选项2(每次部分回发生成唯一的脚本id):
你是最棒的!非常感谢,拯救了我的一天(是的,代码在控制中)
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(), "filePath", "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;
}
ScriptManager.RegisterClientScriptBlock(this, this.Page, "filePath", "top.$get(\"" + uploadedHiddenField.ClientID + "\").value = '" + thePath + "';", true);
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), Guid.NewGuid().ToString(), "top.$get(\"" + uploadedHiddenField.ClientID + "\").value = '" + thePath + "';", true);