我用什么代替e.Values.add(…用于ListViewEditEventArgs上传图片
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05-07-2019 - |
题
我可以在为ListViewInsertEventArgs重新设计e.Values方法时使用linq和listview控件将图像上传到数据库,但ListViewEditEventArgs中没有这样的方法,那么我可以使用什么来获得相同的结果?
这是我的插入代码:
protected void ProjectPhotosList_ItemInserting(object sender,ListViewInsertEventArgs e)
{
FileUpload uplImage =(FileUpload)ProjectPhotosList.InsertItem.FindControl(" uplImage");
标签fileuploadlbl =(标签)ProjectPhotosList.InsertItem.FindControl(" fileuploadlbl");
byte[] img = null;
if (uplImage.HasFile || !uplImage.FileName.ToLower().EndsWith(".jpg"))
{
try
{
img = new byte[uplImage.PostedFile.ContentLength];
uplImage.PostedFile.InputStream.Read(img, 0, img.Length);
}
catch
{
fileuploadlbl.Text = "unable to upload " + uplImage.FileName.ToString();
}
}
if (img == null)
{
e.Cancel = true;
fileuploadlbl.Text = "Please choose a file to upload";
}
try
{
e.Values.Add("ProjectPhoto", new System.Data.Linq.Binary(img));
fileuploadlbl.Text = "File Upload Successful";
}
catch
{
fileuploadlbl.Text = "File Upload Failed, please try again";
}
}
解决方案
这是重要的代码:
int mykey = int.Parse(ProjectPhotosList.DataKeys [e.ItemIndex] .Value.ToString());
它只是获取所选行的primarykey值的简单方法。 我发现了一篇关于将pdf上传到数据库的帖子,并决定将其余的代码基于此。所以这里是完整的代码:
protected void ProjectPhotosList_ItemUpdating(object sender,ListViewUpdateEventArgs e)
{
FileUpload myFile =(FileUpload)ProjectPhotosList.EditItem.FindControl(" uploadImage");
TextBox myCaption = (TextBox)ProjectPhotosList.EditItem.FindControl("ProjectPhotoCaptionTextBox");
int mykey = int.Parse(ProjectPhotosList.DataKeys[e.ItemIndex].Value.ToString());
if (myFile.HasFile)
{
//Get the posted file
Stream fileDataStream = myFile.PostedFile.InputStream;
//Get length of file
int fileLength = myFile.PostedFile.ContentLength;
//Create a byte array with file length
byte[] fileData = new byte[fileLength];
//Read the stream into the byte array
fileDataStream.Read(fileData, 0, fileLength);
//get the file type
string fileType = myFile.PostedFile.ContentType;
//Open Connection
PHJamesDataContext db = new PHJamesDataContext();
//Find the Right Row
PHJProjectPhoto Newphoto = (from p in db.PHJProjectPhotos
where p.ProjectPhotoId == mykey
select p).Single<PHJProjectPhoto>();
Newphoto.ProjectPhoto = fileData;
db.SubmitChanges();
}