public class CreateBytes
{
Encoding encoding = Encoding.UTF8; /**/
/// <summary>
/// 拼接所有的二进制数组为一个数组
/// </summary>
/// <param name="byteArrays">数组</param>
/// <returns></returns>
/// <remarks>加上结束边界</remarks>
public byte[] JoinBytes(ArrayList byteArrays)
{
int length = ;
int readLength = ; // 加上结束边界
string endBoundary = Boundary + "--\r\n"; //结束边界
byte[] endBoundaryBytes = encoding.GetBytes(endBoundary);
byteArrays.Add(endBoundaryBytes); foreach (byte[] b in byteArrays)
{
length += b.Length;
}
byte[] bytes = new byte[length]; // 遍历复制
//
foreach (byte[] b in byteArrays)
{
b.CopyTo(bytes, readLength);
readLength += b.Length;
} return bytes;
} public bool UploadData(string uploadUrl, byte[] bytes, out byte[] responseBytes)
{
WebClient webClient = new WebClient();
webClient.Headers.Add("Content-Type", ContentType); try
{
responseBytes = webClient.UploadData(uploadUrl, bytes);
return true;
}
catch (WebException ex)
{
Stream resp = ex.Response.GetResponseStream();
responseBytes = new byte[ex.Response.ContentLength];
resp.Read(responseBytes, , responseBytes.Length);
}
return false;
} /**/
/// <summary>
/// 获取普通表单区域二进制数组
/// </summary>
/// <param name="fieldName">表单名</param>
/// <param name="fieldValue">表单值</param>
/// <returns></returns>
/// <remarks>
/// -----------------------------7d52ee27210a3c\r\nContent-Disposition: form-data; name=\"表单名\"\r\n\r\n表单值\r\n
/// </remarks>
public byte[] CreateFieldData(string fieldName, string fieldValue)
{
string textTemplate = Boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}\r\n";
string text = String.Format(textTemplate, fieldName, fieldValue);
byte[] bytes = encoding.GetBytes(text);
return bytes;
} /**/
/// <summary>
/// 获取文件上传表单区域二进制数组
/// </summary>
/// <param name="fieldName">表单名</param>
/// <param name="filename">文件名</param>
/// <param name="contentType">文件类型</param>
/// <param name="contentLength">文件长度</param>
/// <param name="stream">文件流</param>
/// <returns>二进制数组</returns>
public byte[] CreateFieldData(string fieldName, string filename, string contentType, byte[] fileBytes)
{
string end = "\r\n";
string textTemplate = Boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n"; // 头数据
string data = String.Format(textTemplate, fieldName, filename, contentType);
byte[] bytes = encoding.GetBytes(data); // 尾数据
byte[] endBytes = encoding.GetBytes(end); // 合成后的数组
byte[] fieldData = new byte[bytes.Length + fileBytes.Length + endBytes.Length]; bytes.CopyTo(fieldData, ); // 头数据
fileBytes.CopyTo(fieldData, bytes.Length); // 文件的二进制数据
endBytes.CopyTo(fieldData, bytes.Length + fileBytes.Length); // \r\n return fieldData;
} #region 属性
public string Boundary
{
get
{
string[] bArray, ctArray;
string contentType = ContentType;
ctArray = contentType.Split(';');
if (ctArray[].Trim().ToLower() == "multipart/form-data")
{
bArray = ctArray[].Split('=');
return "--" + bArray[];
}
return null;
}
} public string ContentType
{
get
{
if (HttpContext.Current == null)
{
return "multipart/form-data; boundary=---------------------------7d5b915500cee";
}
return HttpContext.Current.Request.ContentType;
}
}
#endregion
}
调用方式如下:
CreateBytes cb = new CreateBytes();
// 所有表单数据
ArrayList bytesArray = new ArrayList();
// 普通表单
bytesArray.Add(cb.CreateFieldData("jsonDataStr", "")); // 读文件流
FileStream fs = new FileStream("wolfy.JPG", FileMode.Open,
FileAccess.Read, FileShare.Read); string ContentType = "application/octet-stream";
byte[] fileBytes = new byte[fs.Length];
fs.Read(fileBytes, , Convert.ToInt32(fs.Length)); // 文件表单
bytesArray.Add(cb.CreateFieldData("file1", "wolfy.JPG", ContentType, fileBytes)); bytesArray.Add(cb.CreateFieldData("file2", "wolfy1.JPG", ContentType, fileBytes));
// 合成所有表单并生成二进制数组
byte[] bytes = cb.JoinBytes(bytesArray); // 返回的内容
byte[] responseBytes; bool uploaded = cb.UploadData("http://localhost:8700/api/System/ImgUpload", bytes, out responseBytes);