.Net下二进制形式的文件(图片)的存储与读取(转载)

.Net下图片的常见存储与读取凡是有以下几种:
存储图片:以二进制的形式存储图片时，要把数据库中的字段设置为Image数据类型(SQL Server),存储的数据是Byte[].
1.参数是图片路径:返回Byte[]类型:
public byte[] GetPictureData(string imagepath)
public byte[] PhotoImageInsert(System.Drawing.Image imgPhoto)
public System.Drawing.Image ReturnPhoto(byte[] streamByte)
public void WritePhoto(byte[] streamByte)
Response.ContentType = "application/msword";
Response.ContentType = "application/x-shockwave-flash";
Response.ContentType = "application/vnd.ms-excel";另外可以针对不同的格式，用不同的输出类型以适合不同的类型:
switch (dataread("document_type"))
{
case "doc":
Response.ContentType = "application/msword";
case "swf":
Response.ContentType = "application/x-shockwave-flash";
case "xls":
Response.ContentType = "application/vnd.ms-excel";
case "gif":
Response.ContentType = "image/gif";
case "Jpg":
Response.ContentType = "image/jpeg";
}