Asp.net 使用asmx文件从iphone上传图像

我在这里挣扎了很久， 我正在尝试使用webservice asmx（VB.net）将图像从iphone上载到（iis）服务器文件夹

我搜索了很多，最后使用了以下代码

- (IBAction)btnPostImages_Clicked:(id)sender  {

NSMutableURLRequest *request;

request = [[[NSMutableURLRequest alloc] init] autorelease];

[request setHTTPMethod:@"POST"];

[request setURL:[NSURL URLWithString:@"http://192.168.0.2/digita/digitacampus.asmx/SaveImage"]];

NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];

NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];

[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

NSMutableData *body = [NSMutableData data];

[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n",@"recFile",@"image.jpg"]dataUsingEncoding:NSUTF8StringEncoding]];


[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[NSData dataWithData:dt]];

[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

[request setHTTPBody:body];

NSURLConnection *conn=[[NSURLConnection alloc] initWithRequest:request delegate:self];

}

dt是jpeg格式的图像数据

方法如下所示

<WebMethod()> _
Public Function SaveImage(ByVal recFile As String) As String
    Dim file As HttpPostedFile = HttpContext.Current.Request.Files("recFile")
    Dim targetFilePath As String = HttpContext.Current.Server.MapPath("") + file.FileName
    file.SaveAs(targetFilePath)
    Return file.FileName.ToString()
End Function

我不知道还能做什么

我犯了什么错误

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如何识别图像是否已成功上载

URL是否正确？我认为应该是这样的：digitacampus.asmx？op=SaveImage，也可能是digitalcampus.asmx

您必须将字符串转换为文件流，例如：

Dim fs As FileStream
fs.Write(System.Convert.FromBase64String(recFile), 0, pdfLength)

Dim fs As FileStream
fs.Write(System.Convert.FromBase64String(recFile), 0, pdfLength)