问题描述
如题~
解决方案
解决方案二：
不明白你的二进制流是什么样子DimImgAsNewBitmap(IO.Stream)或者是byte数组
解决方案三：
谢谢流言~是这样的....PublicFunctionpostCaptcha(ByValstrApiKeyAsString,ByValstrCaptchaFileAsString)AsStringDimobjEncodingAsNewSystem.Text.UTF8EncodingDimobjStreamWriterAsSystem.IO.StreamWriterDimobjStreamAsSystem.IO.StreamDimobjHTTPRequestAsHttpWebRequestDimsbPostDataAsNewSystem.Text.StringBuilderDimintUploadBitAsIntegerDimintUploadSoFarAsIntegerDiminttoUploadAsIntegerDimiAsIntegerDimobjStreamReaderAsSystem.IO.StreamDimstrResultAsString'setrequestpropertiesobjHTTPRequest=System.Net.WebRequest.Create("http://localhost:1116/captcha4u/api.aspx")objHTTPRequest.AllowAutoRedirect=TrueobjHTTPRequest.Accept="*/*"objHTTPRequest.UserAgent="Mozilla/4.0(compatible;MSIE6.0;WindowsNT5.1;.NETCLR1.0.3705)"objHTTPRequest.KeepAlive=FalseobjHTTPRequest.Timeout=30000objHTTPRequest.Method="POST"objHTTPRequest.ContentType="multipart/form-data;boundary=7cf2a327f01ae"sbPostData.Append("--"+"7cf2a327f01ae"+vbCrLf)sbPostData.Append("Content-Disposition:form-data;name=""api_key"""+vbCrLf)sbPostData.Append(vbCrLf)sbPostData.Append(strApiKey+vbCrLf)sbPostData.Append("--"+"7cf2a327f01ae"+vbCrLf)sbPostData.Append("Content-Disposition:form-data;name=""expire"""+vbCrLf)sbPostData.Append(vbCrLf)sbPostData.Append("1000"+vbCrLf)'defaultedto1000butyoucanchangethissbPostData.Append("--"+"7cf2a327f01ae"+vbCrLf)sbPostData.Append("Content-Disposition:form-data;name=""method"""+vbCrLf)sbPostData.Append(vbCrLf)sbPostData.Append("upload_captcha"+vbCrLf)sbPostData.Append("--"+"7cf2a327f01ae"+vbCrLf)sbPostData.Append("Content-Disposition:form-data;name=""rights"""+vbCrLf)sbPostData.Append(vbCrLf)sbPostData.Append("false"+vbCrLf)'defaultedtofalsebutyoucanchangethis'thisistheheaderforourcaptchafileuploadsbPostData.Append("--"+"7cf2a327f01ae"+vbCrLf)sbPostData.Append("Content-Disposition:form-data;name=""file"";filename="""&strCaptchaFile&""+vbCrLf)sbPostData.Append("Content-Type:image/pjpeg"+vbCrLf)sbPostData.Append(vbCrLf)'readourcaptchintoabytearrayDimobjBinReaderAsNewBinaryReader(File.OpenRead(strCaptchaFile))DimbytPhotoContentsAsByte()=objBinReader.ReadBytes(objBinReader.BaseStream.Length)objBinReader.Close()'convertourotherpostdataintoabytearrayDimbytPostContentsAsByte()=objEncoding.GetBytes(sbPostData.ToString)'createafooterforinsertationafterthefilebytesareuploadedDimbytPostFooterAsByte()=objEncoding.GetBytes(vbCrLf+"--"+"7cf2a327f01ae"+vbCrLf)'createanewdatabuffertoholdallofourbytearraysDimbytDataBufferAsByte()=NewByte(bytPostContents.Length+bytPhotoContents.Length+bytPostFooter.Length){}'copythecontentsofourthreebytearraysintooursinglebytearraySystem.Buffer.BlockCopy(bytPostContents,0,bytDataBuffer,0,bytPostContents.Length)System.Buffer.BlockCopy(bytPhotoContents,0,bytDataBuffer,bytPostContents.Length,bytPhotoContents.Length)System.Buffer.BlockCopy(bytPostFooter,0,bytDataBuffer,bytPostContents.Length+bytPhotoContents.Length,bytPostFooter.Length)'setthecontentlengthbasedonournewbytearraylengthobjHTTPRequest.ContentLength=bytDataBuffer.Length'getourstreamandpostourdataobjStream=objHTTPRequest.GetRequestStream()'chunkupourdataanduploadittoourstream'willgenerallyonlyneedtosendinonechunkunlessfileislargeintUploadBit=Math.Max(bytDataBuffer.Length/100,50*1024)intUploadSoFar=0Whilei<bytDataBuffer.LengthinttoUpload=Math.Min(intUploadBit,bytDataBuffer.Length-i)intUploadSoFar+=inttoUploadobjStream.Write(bytDataBuffer,i,inttoUpload)i=i+intUploadBitEndWhile'closeourstreamobjStream.Close()'gettheresponsefromtheserverDimobjHTTPResponseAsHttpWebResponse=CType(objHTTPRequest.GetResponse(),HttpWebResponse)objStreamReader=objHTTPResponse.GetResponseStream()'finalresultfromserverisreturnedtostrResultDimobjStreamResultAsNewSystem.IO.StreamReader(objStreamReader)strResult=objStreamResult.ReadToEnd'closeourobjectsobjStreamReader.Close()objStreamResult.Close()ReturnstrResultEndFunctionapi.aspx这是POST过api.aspx.cs里可以用Request.Form["api_key"].ToString()取到值正确的值,但是:"file"图片文件流都不能这样取了这样取出来是乱码~请问谁知道这个图片流怎样取出来并生成图片~谢谢各位了....
解决方案四：
该回复于2008-06-16 08:36:16被版主删除