wrapper the CURLOPT_WRITEDATA

[chucklu]

http://stackoverflow.com/questions/1636333/download-file-using-libcurl-in-c-c
in this example
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
fp is a File* pointer

[chucklu]

CURLOPT_WRITEDATA
Object reference to pass to the Easy.WriteFunction delegate. Note that if you specify the CURLOPT_WRITEFUNCTION, this is the object you'll get as input.

if you can implement pass a file pointer，and the libcurl will write the data to the file automatically

[pjquirk]

Sorry, I don't understand what issue you're raising with this library. Can you clarify?

[chucklu]

CurlSharp\Samples\EasyGet\EasyGet.cs
Curl.GlobalInit(CurlInitFlag.All);

            using (var easy = new CurlEasy())
            {
                easy.Url = args.Count() > 1 ? args[0] : "http://www.amazon.com/";
                easy.WriteData = null;
                easy.WriteFunction = OnWriteData;
                //easy.ProgressFunction = OnProgressData;
                easy.Perform();
            }

            Curl.GlobalCleanup();

[chucklu]

easy.WriteData = null;
the WriteData property of easy,I want to set this as file pointer

I have tried this,
//string fileName = "test.txt";
//TextWriter textWriter = File.CreateText(fileName);
//curlEasy.WriteData = textWriter;

System.ArgumentException was unhandled
HResult=-2147024809
Message=Object contains non-primitive or non-blittable data.
Source=mscorlib
StackTrace:
at System.Runtime.InteropServices.GCHandle.InternalAlloc(Object value, GCHandleType type)
at System.Runtime.InteropServices.GCHandle.Alloc(Object value, GCHandleType type)
at CurlSharp.CurlEasy.getHandle(Object obj) in D:\SourceCode\GitHub\CurlSharp\CurlSharp\CurlEasy.cs:line 1541
at CurlSharp.CurlEasy.setWriteData(Object data) in D:\SourceCode\GitHub\CurlSharp\CurlSharp\CurlEasy.cs:line 234
at CurlSharp.CurlEasy.set_WriteData(Object value) in D:\SourceCode\GitHub\CurlSharp\CurlSharp\CurlEasy.cs:line 217
at LibCurlTest.Form1.button1_Click(Object sender, EventArgs e) in F:\CodeForGitBlit\LibCurl\LibCurlTest\Form1.cs:line 37
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 LibCurlTest.Program.Main() in F:\CodeForGitBlit\LibCurl\LibCurlTest\Program.cs:line 19
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.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: