问题描述
您好，我如何验证上传的文件类型？我只想让人们只上传他们的图像文件类型。
以下是我用来允许用户上传文件的代码片段：
private void StartUpLoad（）
{
string companyID = this.Label1.Text;
string imgName = FileUpload1.FileName;
string imgPath =〜/ Uploads /+ imgName;
int imgSize = FileUpload1.PostedFile.ContentLength;
if（FileUpload1.PostedFile！= null && FileUpload1.PostedFile.FileName ！=）
{
if（FileUpload1.PostedFile.ContentLength> 1000000）
{
Page.ClientScript.RegisterClientScriptBlock（typeof（Page），Alert，alert（'File is too big。'），true）;
}
其他
{
FileUpload1.SaveAs（Server.MapPath（imgPath） ））;
Image1.ImageUrl = imgPath;
Page.ClientScript.RegisterClientScriptBlock（typeof（Page），Alert，alert（'Image saved！'） ，true）;
byte [] theImage = new byte [FileUpload1.PostedFile.ContentLength];
HttpPostedFile Image = FileUpload1.PostedFile;
Image.InputStream.Read（theImage，0（int）FileUpload1.PostedFile.ContentLength）;
int length = theImage.Length;
string fileName = FileUpload1.FileName.ToString（）;
string type = FileUpload1.PostedFile.ContentType;
int size = FileUpload1.PostedFile.ContentLe ngth;
if（FileUpload1.PostedFile！= null && FileUpload1.PostedFile.FileName！=）
{
WP_advBLL canwork = new WP_advBLL（）;
canwork.ExecuteInsert（theImage，type，size，fileName，length，companyID）;
Response.Write（文件已成功上传！）;
}
}
}
任何想法如何添加以检查所选文件的类型？
Hello, how do i validate the file types that are uploaded ? i only want to allow people to upload their image file types only.
Below is a snippet of code that i use to allow users to upload their file:
private void StartUpLoad()
{
string companyID = this.Label1.Text;
string imgName = FileUpload1.FileName;
string imgPath = "~/Uploads/" + imgName;
int imgSize = FileUpload1.PostedFile.ContentLength;
if (FileUpload1.PostedFile != null && FileUpload1.PostedFile.FileName != "")
{
if (FileUpload1.PostedFile.ContentLength > 1000000)
{
Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Alert", "alert('File is too big.')", true);
}
else
{
FileUpload1.SaveAs(Server.MapPath(imgPath));
Image1.ImageUrl = imgPath;
Page.ClientScript.RegisterClientScriptBlock(typeof(Page),"Alert","alert('Image saved!')", true);
byte[] theImage = new byte[FileUpload1.PostedFile.ContentLength];
HttpPostedFile Image = FileUpload1.PostedFile;
Image.InputStream.Read(theImage,0(int)FileUpload1.PostedFile.ContentLength);
int length = theImage.Length;
string fileName = FileUpload1.FileName.ToString();
string type = FileUpload1.PostedFile.ContentType;
int size = FileUpload1.PostedFile.ContentLength;
if (FileUpload1.PostedFile != null && FileUpload1.PostedFile.FileName != "")
{
WP_advBLL canwork = new WP_advBLL();
canwork.ExecuteInsert(theImage, type, size, fileName, length,companyID);
Response.Write("File has been uploaded successfully!");
}
}
}
Any idea how to add on to check for type of files selected?
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