如何在ASP.NET C#中上传带附件的数据 [英] How to upload data with attachments in ASP.NET C#
问题描述
亲爱的所有人,
我有一个网络应用程序。要求是使用带有附件的excel表上传数据。
我尝试过:
我已经从excel表中完成了上传数据,但是我无法上传附件文件。
示例数据:
- -------------------------------------------------- ------------------------------
| CandidateID | CandidateName |年龄|图片| IsActive |
---------------------------------------------- -----------------------------------
| 01 |约翰| 22 | C:\ User \Abc \ MyFiles; \\ J123.jpg |是的|
---------------------------------------------- ----------------------------------
*候选图片路径来自客户端的机器。
我如何允许客户端上传带有附件的数据(Excel表格)?
任何人都可以帮助我,我怎样才能上传带有asp.net C#数据的图片文件。
提前致谢
您可以将图像转换为base64并将其保存为字符串。在数据表中保存nvarchar(max)字段。 />
1.将图像转换为base64:
string path =D:\\ \\\SampleImage.jpg;
using(System.Drawing.Image image = System.Drawing.Image.FromFile(path))
{
using(MemoryStream m = new MemoryStream())
{
image.Save(m,image.RawFormat);
byte [] imageBytes = m.ToArray();
base64String = Convert.ToBase64String(imageBytes);
返回base64String;
}
}
2.将base64字符串转换为图片:
< br $>
public System.Drawing.Image Base64ToImage(string base64String)
{
byte [] imageBytes = Convert.FromBase64String( base64String);
MemoryStream ms = new MemoryStream(imageBytes,0,imageBytes.Length);
ms.Write(imageBytes,0,imageBytes.Length);
System.Drawing.Image image = System.Drawing.Image.FromStream(ms,true);
返回图片;
}
1。您将需要一个HTML表单,其属性设置为附加文件:
< form action =upload.aspxmethod =postenctype =multipart / form-data>
2.所述表格需要有一个 input 元素用于文件:
< input type =filename =fileToUploadid =fileToUpload>
3.您需要有一个服务器端脚本来处理表单并保存文件。
我没有做所有的工作,试试谷歌;我做了
ASP.NET - 文件上传 [ ^ ]
Dear All,
I have a web application. The requirement is to upload the data using excel sheet with attachments.
What I have tried:
I have already completed upload data from excel sheet but I'm not able to upload the attachments files.
Example data: --------------------------------------------------------------------------------- |CandidateID | CandidateName| Age | Picture | IsActive | --------------------------------------------------------------------------------- | 01 | John | 22 | C:\User\Abc\MyFiles\J123.jpg | Yes | --------------------------------------------------------------------------------
*The candidate picture path is from the client's machine.
How can I allow the client to upload data(Excel sheet) with attachment?
Can anyone please help me, how can I upload the picture file with data in asp.net C#.
Thanks in advance
You can convert the image to base64 and save it as a string.Keep the field of nvarchar(max) in datatable.
1. Convert image to base64:
string path = "D:\\SampleImage.jpg"; using(System.Drawing.Image image = System.Drawing.Image.FromFile(path)) { using(MemoryStream m = new MemoryStream()) { image.Save(m, image.RawFormat); byte[] imageBytes = m.ToArray(); base64String = Convert.ToBase64String(imageBytes); return base64String; } }
2. Convert base64 string to image:
public System.Drawing.Image Base64ToImage(string base64String) { byte[] imageBytes = Convert.FromBase64String(base64String); MemoryStream ms = new MemoryStream(imageBytes, 0, imageBytes.Length); ms.Write(imageBytes, 0, imageBytes.Length); System.Drawing.Image image = System.Drawing.Image.FromStream(ms, true); return image; }
1. You will need an HTML form with its attributes set to have a file attached:
<form action="upload.aspx" method="post" enctype="multipart/form-data">
2. Said form will need to have an input element for a file:
<input type="file" name="fileToUpload" id="fileToUpload">
3. You will need to have a server side script to process the form and save the file.
I'm not doing all the work, try Google; I did
ASP.NET - File Uploading[^]
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