文件上传器 [英] FileUploader

问题描述

您好，我是将文件上传到名为"UploadedImages"的文件夹，并且一切都很好，但是我有一个图像控件，我希望它显示图像，但它没有做，知道在我上传图像时，图像上的取消"按钮变成另一个图标.这是我的代码.希望任何人都可以帮助我.

Hi,iam uploading files to a folder called "UploadedImages",and everything is going fine,but i have a an image control which i want it to show the image but it is not doing,knowing that when i upload the image,the cancel button on the image turns into another icon.This is my code.I hope that anyone help me.

protected void Button1_Click(object sender, EventArgs e)
    {
        if (IsPostBack)
        {
            Boolean fileOK = false;
            String path = Server.MapPath("UploadedImages");
            if (FileUpload1.HasFile)
            {
                String fileExtension =
                    System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
                String[] allowedExtensions = { ".gif", ".png", ".jpeg", ".jpg" };
                for (int i = 0; i < allowedExtensions.Length; i++)
                {
                    if (fileExtension == allowedExtensions[i])
                    {
                        fileOK = true;
                    }
                }
            }
            if (fileOK)
            {
                try
                {
                    FileUpload1.PostedFile.SaveAs(path
                        + FileUpload1.FileName);
                    Label1.Text = "File uploaded!";
                    Image1.ImageUrl = path + FileUpload1.FileName;

                }
                catch (Exception ex)
                {
                    
                    Label1.Text = ex.Message;
                }
            }
            else
            {
                Label1.Text = "Cannot accept files of this type.";
            }
        }


    }

推荐答案

Image1.ImageUrl将采用〜/MY_IMAGE.JPG"之类的相对Url，因此在将相对URl上传到图像控件后，就可以解决问题.

希望这会有所帮助.

Hi,
Image1.ImageUrl will take relative Url like "~/MY_IMAGE.JPG" so after uploading assign relative URl to your image control, that will do the trick.

Hope this will help.

尝试一下，

Try this,

Image1.ImageUrl = "~/UploadedImages/" + FileUpload1.FileName;

这里是一个示例工作代码段.您必须使用ImageURL提供相对路径.

Here is one sample working code snippet. You have to provide Relative paths with ImageURL.

protected void Button1_Click(object sender, EventArgs e)
   {
       if (FileUpload1.HasFile)
       {
           string filename = Guid.NewGuid().ToString() + ".jpg";
           FileUpload1.PostedFile.SaveAs(Server.MapPath("Images\\") +filename);
           aspimage.ImageUrl = "~/Images/" + filename;
       }
   }

这篇关于文件上传器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！