利用SOAP（Webservice）上传文件

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[WebMethod(Description="上传并保存图片文件")]
public bool SaveFile(byte[] binData,string fileName){
bool success=false;

string savePath=System.Configuration.ConfigurationSettings.AppSettings["UploadDirectory"];
if(savePath==null) savePath="Photo";
if(savePath.IndexOf("://")<0) savePath=Server.MapPath(savePath);//不是绝对路径
if(!savePath.EndsWith("//")) savePath += "//";

if(!Directory.Exists(savePath)){
throw new Exception("服务器端没有找到有效的保存路径！");
}

FileStream fileStream=null;
try{
fileStream=new FileStream(savePath + fileName,FileMode.Create,FileAccess.Write);
//write the file
fileStream.Write(binData,0,binData.Length);
fileStream.Flush();//clear the buffer,write the data to the hard disk
success=true;
}catch(Exception ex){
throw new Exception(ex.Message);
}finally{
fileStream.Close();
}
return success;

}

解决思路：编写WebService过程SaveFile(byte[] binData,string fileName0;
客户端直接用调用，把数据流作参数传上来就完了。