如何存储Bitmap对象到DataSet里

[longbow74]

?

[hzg_yujia]

不能。
bitmap以BLOB形式存储。
在.Net中，必须先存储一条此字段为空的记录，然后再利用Parameter对象Update这条记录为BlOB字段赋值。

[longbow74]

定义DataSet的时候怎么把字段定义为BLOB类型的

[韩小明]

gz

[jcaomao]

把字段设成hexbinary应该就可以了。

[saucer]

make the DataColumn of byte array type, then you can do try something like (VB):

Dim ms As New IO.MemoryStream()
Dim p As New Bitmap("c:\fish.bmp")
p.Save(ms, p.RawFormat)
Dim arrImage() As Byte = ms.GetBuffer

'create a new row of data in the dataset
Dim r As DataSet1.Table2Row = DataSet11.Photos.NewTable2Row
r.name = "fish"
'set the picture field of the dataset row to the Byte array
r.picture = arrImage

'add the row to the dataset
DataSet11.Photos.Rows.Add(r)

'save the data in the dataset to the database
OleDbDataAdapter1.Update(DataSet11)


http://groups.google.com/groups?q=bitmap+save+dataset+picturebox+memorystream&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=Os1JpBupCHA.2796%40TK2MSFTNGP10&rnum=1

[NaZiChong]

http://expert.csdn.net/Expert/topic/1446/1446130.xml?temp=1.383609E-02

[longbow74]

我用的是一个Strongtype的dataSet(报表用),请问放image的字段用什么类型?