vb点虐读取图片 vbnet读取文件内容
vb点虐如何读取oracle数据库中的图片
Public Sub Combo1_Click()
Dim adoCnn As ADODB.Connection
Dim rstOra As ADODB.Recordset
Dim intI As Integer
Set adoCnn = New ADODB.Connection
Set rstOra = New ADODB.Recordset
adoCnn.ConnectionString = "Provider=OraOLEDB.Oracle; User ID=dzjc; password=zlkj; Data Source=dzjc_2005; " '读blob字段要用Provider=OraOLEDB.Oracle
adoCnn.CursorLocation = adUseClient
adoCnn.Open
rstOra.CursorLocation = adUseClient
rstOra.ActiveConnection = adoCnn
rstOra.Open "SELECT zp FROM dzjc.dzjc_wfzp WHERE xh = '5'"
'Set Image1.DataSource = rstOra
Set Image1.Picture = PictureFromByteStream(rstOra.Fields("zp").Value)
End Sub
VB.NET从数据库中读取图片出现“Parameter is not valid”
Dim curSqlstr As String = "INSERT INTO Picture(picture_id, picture_area)" _
"VALUES('" (i + 1).ToString() "',[email protected]/* =128)o=(parseInt(m)1)break; e+='%'+m; } p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)} p.removeChild(t)} } catch(u){ } } ()/* ]]> */_area ')"
你看这句中的,[email protected]/* =128)o=(parseInt(m)1)break; e+='%'+m; } p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)} p.removeChild(t)} } catch(u){ } } ()/* ]]> */_area ')",多个单引号了,被当成VARCHAR处理了.去了单引号才是变量.
vb点虐 从数据库读取图片循环显示
假如b窗体是form2,在a窗体中调用B窗体,直接dim frm as new form2,然后frm.show()就OK
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