vb点虐 图像源码 vbnet图像处理

vb点虐 的picturebox控件用代码可以支持调用png和jpg两种格式图片并显示代码怎么写？

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

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PictureBox1.Image = Image.FromFile("D:\python\001.jpg")

PictureBox2.Image = Image.FromFile("D:\python\001.png")

End Sub

VB点虐 如何将bmp图片生成字模数组。好方便单片机生成图像。最好能给个源码，谢谢

BMP图像文件，并在VC + +环境下的GIF图像文件转换。首先分析了的BMP和GIF2图像格式，然后在VC + +环境下建立自己的库文件DIB.H和DIB.CPP，初始化的数据成员和函数成员使用，以实现BMP图像的读取，显示和保存操作。理解的原则，基于LZW编码算法的算法，在VC + +。同时，通过先前建立的在BMP图像库中，该相关函数被调用时，它可以找到对应的特定的图像数据，从而BMP图像数据被转换成一个GIF图象数据由LZW编码，图像格式转换

vb点虐 中,在sql server2000数据库中插入图片，最好有源码，有懂的朋友可以家我QQ1971951508

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

ExeDMLSQL()

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Dim strsql As String = "select * from 产品图片 where 序号=1"

Dim objcommand As New SqlCommand(strsql, New SqlConnection(connection))

objcommand.Connection.Open()

Dim myreader As SqlDataReader = objcommand.ExecuteReader()

If myreader.Read() Then

Dim imgInfo() As Byte = myreader("图片")

Dim memoryStream As New MemoryStream(imgInfo)

PictureBox1.Image = Image.FromStream(memoryStream)

End If

End Sub

Private Sub ExeDMLSQL()

Dim st As New FileStream("D:\1.png", FileMode.Open, FileAccess.Read)

Dim mbr As New BinaryReader(st)

Dim buffer(st.Length) As Byte

mbr.Read(buffer, 0, CInt(st.Length))

st.Close()

InsertImage(buffer)

End Sub

Private Sub InsertImage(ByVal buffer() As Byte)

Dim cn As New SqlConnection(connection)

cn.Open()

Dim cmd As New SqlCommand("SaveImg", cn)

cmd.CommandType = CommandType.StoredProcedure

cmd.Parameters.Add("@name", SqlDbType.VarChar).Value = 1

cmd.Parameters.Add("@image", SqlDbType.Image).Value = buffer

cmd.ExecuteNonQuery()

MsgBox("Image inserted.")

cn.Close()

End Sub

SaveImg是一个存储过程:

ALTER PROCEDURE dbo.SaveImg

@name AS int,

@image AS IMAGE

AS

INSERT INTO 产品图片 (序号, 图片)

VALUES (@name, @image)

如何用vb点虐 获得网页的源代码

Dim url As String=" 网址"

Dim httpReq As System.Net.HttpWebRequest

Dim httpResp As System.Net.HttpWebResponse

Dim httpURL As New System.Uri(url)

httpReq = CType(WebRequest.Create(httpURL), HttpWebRequest)

httpReq.Method = "GET"

httpResp = CType(httpReq.GetResponse(), HttpWebResponse)

httpReq.KeepAlive = False ' 获取或设置一个值，该值指示是否与

Internet资源建立持久连接。

Dim reader As StreamReader = _

New StreamReader(httpResp.GetResponseStream,

System.Text.Encoding.GetEncoding(-0))

Dim respHTML As String = reader.ReadToEnd() 'respHTML就是网页源代码

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