vb.net圖片二進(jìn)制的簡(jiǎn)單介紹

在VB.net中如何將圖片轉(zhuǎn)換成二進(jìn)制保存到Accees中

在access數(shù)據(jù)庫(kù)里將字段的類型設(shè)置為ole對(duì)象

十多年的彌勒網(wǎng)站建設(shè)經(jīng)驗(yàn)，針對(duì)設(shè)計(jì)、前端、開發(fā)、售后、文案、推廣等六對(duì)一服務(wù)，響應(yīng)快，48小時(shí)及時(shí)工作處理。網(wǎng)絡(luò)營(yíng)銷推廣的優(yōu)勢(shì)是能夠根據(jù)用戶設(shè)備顯示端的尺寸不同，自動(dòng)調(diào)整彌勒建站的顯示方式，使網(wǎng)站能夠適用不同顯示終端，在瀏覽器中調(diào)整網(wǎng)站的寬度，無(wú)論在任何一種瀏覽器上瀏覽網(wǎng)站，都能展現(xiàn)優(yōu)雅布局與設(shè)計(jì)，從而大程度地提升瀏覽體驗(yàn)。創(chuàng)新互聯(lián)公司從事“彌勒網(wǎng)站設(shè)計(jì)”,“彌勒網(wǎng)站推廣”以來(lái)，每個(gè)客戶項(xiàng)目都認(rèn)真落實(shí)執(zhí)行。

Public img As Byte() '圖片處理用的字節(jié)數(shù)組

img=My.Computer.FileSystem.ReadAllBytes(filePath)'filePath是你圖片文件的路徑

剩下的就是數(shù)據(jù)庫(kù)插入操作了

Dim?cn?As?New?OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data?Source=Data.mdb")

Dim?comm?As?OleDb.OleDbCommand

comm?=?New?OleDb.OleDbCommand(?_

"INSERT?INTO?Photo(BuFan_F,PhotoNo,Photo)?Values('"??Me.CobBuFan.Text.Trim??"','"??Me.txtNo.Text.Trim??"',@image)",?cn)

'向數(shù)據(jù)庫(kù)添加存儲(chǔ)了圖片數(shù)據(jù)的二進(jìn)制數(shù)組

comm.Parameters.Add("@image",?_

OleDb.OleDbType.Binary,?img.Length).Value?=?img

If?cn.State?=?ConnectionState.Closed?Then?cn.Open()?'打開數(shù)據(jù)庫(kù)連接

comm.ExecuteNonQuery()?'執(zhí)行數(shù)據(jù)庫(kù)命令

If?cn.State?=?ConnectionState.Open?Then?cn.Close()?'關(guān)閉數(shù)據(jù)庫(kù)連接

MessageBox.Show("圖片成功保存到數(shù)據(jù)庫(kù)",?"完成",?MessageBoxButtons.OK,?MessageBoxIcon.Information)

vb.net 圖片轉(zhuǎn)換二進(jìn)制代碼

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

Dim MyStream As New System.IO.MemoryStream

Me.PictureBox1.Image.Save(MyStream, System.Drawing.Imaging.ImageFormat.Jpeg)

Dim MyBytes(MyStream.Length) As Byte

MyStream.Read(MyBytes, 0, MyStream.Length)

MyStream.Close()

Dim strText As String

strText = BitConverter.ToString(MyBytes)

Me.TextBox1.Text = strText

End Sub

vb.net如何將圖片轉(zhuǎn)二進(jìn)制

'容易，用api，查一查SetBitmapBits

'新建工程，增加一個(gè) command button ， 一個(gè) picture box , 將圖片加載到 picture box.

'將代碼粘貼到 Form1

Private Type BITMAP

bmType As Long

bmWidth As Long

bmHeight As Long

bmWidthBytes As Long

bmPlanes As Integer

bmBitsPixel As Integer

bmBits As Long

End Type

Private Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long

Private Declare Function GetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long

Private Declare Function SetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long

Dim PicBits() As Byte, PicInfo As BITMAP, Cnt As Long

Private Sub Command1_Click()

'Get information (such as height and width) about the picturebox

GetObject Picture1.Image, Len(PicInfo), PicInfo

'reallocate storage space

ReDim PicBits(1 To PicInfo.bmWidth * PicInfo.bmHeight * 3) As Byte

'Copy the bitmapbits to the array

GetBitmapBits Picture1.Image, UBound(PicBits), PicBits(1)

'Invert the bits

For Cnt = 1 To UBound(PicBits)

PicBits(Cnt) = 255 - PicBits(Cnt)

Next Cnt

'Set the bits back to the picture

SetBitmapBits Picture1.Image, UBound(PicBits), PicBits(1)

'refresh

Picture1.Refresh

End Sub

vb.net二進(jìn)制怎么讀取文件？

一、二進(jìn)制文件讀寫

1、寫二進(jìn)制數(shù)據(jù)到指定目錄

==將barray字節(jié)數(shù)組中的數(shù)據(jù)創(chuàng)建在strFilename目錄文件下，存儲(chǔ)格式為二進(jìn)制，F(xiàn)alse表示不添加，直接覆蓋創(chuàng)建。

2、從指定路徑下讀取二進(jìn)制數(shù)據(jù)到數(shù)組

==將目錄中的文件讀取到barry字節(jié)數(shù)組中，即讀取二進(jìn)制文件。

二、字符文件的讀寫

1、 將txtFile控件中的字符寫到srtFileName指定目錄,以創(chuàng)建方式。

2、從srtFileName目錄中的文件讀取到txtFile控件

分享標(biāo)題：vb.net圖片二進(jìn)制的簡(jiǎn)單介紹
分享路徑：http://muchs.cn/article28/docohcp.html

成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián)，為您提供微信公眾號(hào)、手機(jī)網(wǎng)站建設(shè)、網(wǎng)站策劃、商城網(wǎng)站、外貿(mào)建站、虛擬主機(jī)

廣告

聲明：本網(wǎng)站發(fā)布的內(nèi)容（圖片、視頻和文字）以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主，如果涉及侵權(quán)請(qǐng)盡快告知，我們將會(huì)在第一時(shí)間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng)，如需處理請(qǐng)聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載，或轉(zhuǎn)載時(shí)需注明來(lái)源： 創(chuàng)新互聯(lián)