文件上传器

本文介绍了文件上传器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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; } }