vb.net图片上传 vb中加载图片
asp.net (vb) 中kindeditor无法上传本地图片,提示是:服务器故障!怎么修改!请大家帮帮忙!谢谢了!
设置没有完全 你再好好查查kindeditor的配置方法,最好是WEBCONFIG文件里要设置上传图片的路径
我们提供的服务有:成都网站设计、成都网站建设、微信公众号开发、网站优化、网站认证、麻章ssl等。为千余家企事业单位解决了网站和推广的问题。提供周到的售前咨询和贴心的售后服务,是有科学管理、有技术的麻章网站制作公司
vb.net中,如何点击按钮调出选择文件窗口选中图片并在picturebox中显示出来?
button , OpenFileDialog , PictureBox , textbox 控件,我把图片显示在 picturebox 中,而路
径存放在 textbox 中,不知道这样行不行。
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim filename As String
OpenFileDialog1.Filter = "jpg files (*.jpg)|*.jpg"
OpenFileDialog1.FilterIndex = 1
If OpenFileDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then
filename = OpenFileDialog1.FileName
Else
End
End If
If Not (PictureBox1.Image Is Nothing) Then
PictureBox1.Image.Dispose()
PictureBox1.Image = Nothing
End If
'PictureBox1.Image = System.Drawing.Image.FromFile(filename)
去掉注释后就显示图片
TextBox1.Text = filename
End Sub
picturebox中只记录文件存放的路径,我找了一个 ImageLocation 函数
PictureBox1.ImageLocation = filename 不过还是会显示图片
vb.net 中如何将图片保存到SQL数据库
#Region "二进制文件的存储函数" Public Function BinaryToFile(ByRef TableRowColItem As Object, ByVal FileName As String) As Boolean Dim data As Byte() = TableRowColItem
Dim myfilestream As New System.IO.FileStream(FileName, IO.FileMode.Create)
myfilestream.Write(data, 0, data.Length)
myfilestream.Close()
Return True
End Function Public Function BinaryToImage(ByRef TableRowColItem As Object, ByRef image As Image) As Boolean Dim data As Byte() = TableRowColItem Dim imgStream As New System.IO.MemoryStream '(data)
imgStream.Write(data, 0, data.Length)
image = System.Drawing.Image.FromStream(imgStream)
imgStream.Close()
imgStream.Dispose() Return True
End Function
Public Function BinaryFromFile(ByVal FileName As String, ByRef TableRowColItem As Object) As Boolean Using myfilestream As New FileStream(FileName, FileMode.Open, FileAccess.Read)
Dim data() As Byte
ReDim data(myfilestream.Length - 1)
myfilestream.Read(data, 0, myfilestream.Length)
myfilestream.Close()
TableRowColItem = data End Using
Return True
End Function Public Function BinaryFromImage(ByRef Image As Image, ByRef TableRowColItem As Object) As Boolean
Dim imgStream As New MemoryStream
Dim b As New Bitmap(Image) b.Save(imgStream, System.Drawing.Imaging.ImageFormat.Jpeg) Dim data As Byte() = imgStream.GetBuffer
TableRowColItem = data
data = TableRowColItem
imgStream.Close()
imgStream.Dispose() Return True
End Function Public Function BinaryFromImage(ByVal Image As Image, ByRef TableRowColItem As Object, ByVal imgFormat As System.Drawing.Imaging.ImageFormat) As Boolean
Dim imgStream As New MemoryStream
'Image.Save(imgStream, imgFormat)
'Dim b As New Bitmap(Image)
'b.Save("c:\a.bmp", imgFormat)
'b.Save("c:\a.bmp", imgFormat) Dim data As Byte() = imgStream.GetBuffer TableRowColItem = data
data = TableRowColItem
imgStream.Close()
Return True
End Function
#End Region
vb.net中,如何像下图一样,用很简单的办法,导入1000张图片。
很简单的方法,貌似没有。这个需要自己写很多代码:
用一个ListView控件。
判断滚动条当前所显示的图片集合,获取它们的物理路径。
用Bitmap.FromImage方法把这些图片读出来,
然后获取缩略图,
把缩略图用Graphics.DrawImage()绘制出来。
我可以提供Bitmap如何获取缩略图的方法:
''' summary必须创建一个委托并将对此委托的引用作为获取缩略图 callback 参数传递,但不使用此委托。/summary
Public Function ThumbnailCallback() As Boolean
Return False
End Function
''' summary返回Image,表示图像指定 宽 和 高 的缩略图。/summary
Public Function 获取缩略图(位图 As Bitmap, 宽 As Integer, 高 As Integer) As Image
Dim myCallback As New Image.GetThumbnailImageAbort(ThumbnailCallback)
Return 位图.GetThumbnailImage(宽, 高, myCallback, IntPtr.Zero)
End Function
本文题目:vb.net图片上传 vb中加载图片
网页链接:http://pwwzsj.com/article/doidocp.html