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DBとの間でドキュメントをアップロードおよび取得しています。アップロードはうまく機能しますが、取得がエラーの原因です。取得のコードは次のとおりです

DataGridViewRow row = dataGridView1.CurrentRow;
            int SelectedplantId = Convert.ToInt32(row.Cells["PId"].Value);
            SQLiteConnection conn = new SQLiteConnection(connString);
            conn.Open();
            string qry = "select Otherdocuments from Plant where PId = @PId";
            SQLiteCommand cmd = new SQLiteCommand(qry, conn);
            cmd.Parameters.AddWithValue("@PId", SelectedpId);

            byte[] buffer = (byte[])cmd.ExecuteScalar();
            conn.Close();

            //string filename = Application.StartupPath + "\\" + sFileName;
           string SaveLocation = "C:" + "\\" + sFileName;
           FileStream fs = null;
           try
           {
               fs = new FileStream(SaveLocation,FileMode.Create);
               fs.Write(buffer, 0, buffer.Length);
           }
           finally
           {
               if (fs != null)
               {
                   ((IDisposable)fs).Dispose();
               }
           }

at fs = new FileStream(SaveLocation,FileMode.Create); この例外が発生する場所です。

Stack Trace
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)
   at System.IO.FileStream..ctor(String path, FileMode mode)
   at RVEST.frmPlant.btnRetrieveDocs_Click(Object sender, EventArgs e) in C:\D_Drive_Stuff\RVESTV2\RVEST\frmPlant.cs:line 169
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at RVEST.Program.Main() in C:\D_Drive_Stuff\RVESTV2\RVEST\Program.cs:line 26
   at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()
Thank you

太陽

4

1 に答える 1

2

エラーメッセージは明白なようです。アプリには書き込み権限がなくC:\、おそらくApplication.StartupPathどちらにも書き込み権限がありません。

 //string filename = Application.StartupPath + "\\" + sFileName;
 //string SaveLocation = "C:" + "\\" + sFileName;
 string SaveLocation = Path.Combine(
    Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), sFileName);

適用できる可能性のある他のいくつかがありSpecialFolderます。

于 2012-05-11T20:22:00.973 に答える