急求解答！怎样读取access中的
图片
大家好，我用vb.net连接access
数据库，读取
一个表的中的字段，这个字段是
图片，但是一般
图片应该是用路径表达，但是这个表里的
图片却是“包”，我应该怎么读取，谢谢大家的帮助！！！
__________________________________________________________________________
我的
代码是这样的,从pro表中取字段tupian
Dim str As String
str = Request.QueryString( id )
Dim cnn As OleDbConnection
cnn = New OleDbConnection( Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:/Inetpub/wwwroot/home/data/Jaqua_Product.mdb )
Dim cmd As OleDbCommand
cmd = New OleDbCommand( select cpleibie,tupian from PRO where cpleibie= & str & )
cmd.Connection = cnn
cnn.
open()
Dim dr As OleDbDataReader
dr = cmd.ExecuteReader()
Response.Write(
| ID |
PASSWORD |
) do while dr.Read() Response.Write(
| + dr.GetString(0) + | ) Response.Write(
+ dr.GetString(1) + |
)__________________________________________________________________________转换成二进制流来读,例如: private void ReadPicture(int ID) { string sql = SELECT Picture,FileSize,ContentType FROM table WHERE ID = ID;//FileSize为图片大小,ContentType为图片格式 // Create Connection object OleDbConnection dbConn = new OleDbConnection(Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:/Inetpub/wwwroot/home/data/Jaqua_Product.mdb ); // Create Command Object OleDbCommand dbComm = new OleDbCommand(sql,dbConn); // Open Connection dbConn.open(); // Execute command and receive DataReader OleDbDataReader dbRead = dbComm.ExecuteReader(); dbRead.Read(); // Clear Response buffer Response.Clear(); // Set ContentType to the ContentType of our file // Response.ContentType = (string)dbRead[ ContentType ]; // Write data out of database into Output Stream Response.OutputStream.Write((byte[])dbRead[ Picture ],(int)dbRead[ FileSize ]); // Close database connection dbConn.Close(); // End the page Response.End(); } 把图片转换成二进制流.__________________________________________________________________________谢谢taoyuming(知识就是财富) 真诚的回答!__________________________________________________________________________
