Silverlight 应用程序中的图像上传

Question

当我尝试使用 Silverlight 应用程序将图像从我的本地驱动器上传到 ms sql 时，它抛出异常“不允许文件操作。访问路径 'userimage.png' 被拒绝 ”。如何解决这个问题？我不擅长 Silverlight。请帮助我。

我的代码是，

OpenFileDialog ofd = new OpenFileDialog();
ofd.ShowDialog();
string filename = ofd.File.Name;
FileInfo fInfo = new FileInfo(filename);
long numBytes = fInfo.Length;
FileStream fStream = new FileStream(filename, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fStream);
byte[] data = br.ReadBytes((int)numBytes);

我在这里遇到错误，“FileInfo fInfo = new FileInfo(filename);”

堆栈跟踪是，

at System.IO.FileSecurityState.EnsureState() at System.IO.FileInfo.Init(String fileName, Boolean checkHost) at System.IO.FileInfo..ctor(String fileName) at AttendanceManagementSystem.InsertPopup.btnimg_Click(Object sender, RoutedEventArgs e) at System.Windows.Controls.Primitives.ButtonBase.OnClick() at System.Windows.Controls.Button.OnClick() at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e) at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e) at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName, UInt32 flags)

Answer 1

终于，它现在工作正常了。工作代码如下。

            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "Image files (*.jpg, *.jpeg, *.jpe, *.jfif, *.png) | *.jpg; *.jpeg; *.jpe; *.jfif; *.png";
            bool? userClickedOK = ofd.ShowDialog();
            if (userClickedOK == true)
            {
                System.IO.Stream fileStream = ofd.File.OpenRead();
                FileStream fStream = ofd.File.OpenRead();
                BinaryReader br = new BinaryReader(fStream);
                byte[] imagedata = br.ReadBytes((int)fStream.Length);
            }

现在字节数组“imagedata”可以插入数据库了。

Silverlight 应用程序中的图像上传

Image Upload in Silverlight Application

c#

file-upload

filestream

silverlight-5.0

fileinfo