在VB Winsock中传输图片，土粉们可以将图像数据分割成较小的块，并使用Winsock控件发送这些块。下面土嘎嘎小编分享一个简单的示例代码，演示了如何通过VB Winsock传输图片：
发送端（客户端）：
〓〓vb代码如下：〓〓
Dim imgData As String '图片的二进制数据
Dim chunkSize As Integer ' 块大小
Dim totalChunks As Integer ' 总块数
' 读取图片并转换为Base64编码
imgData = ConvertImageToBase64("path_to_image.jpg")
chunkSize = 1024 ' 每个块的大小
totalChunks = Len(imgData) \ chunkSize + IIf(Len(imgData) Mod chunkSize > 0, 1, 0)
Winsock1.SendData totalChunks.ToString() ' 发送总块数
Dim i As Integer
For i = 0 To totalChunks - 1
Dim chunk As String
chunk = Mid(imgData, i * chunkSize + 1, chunkSize)
Winsock1.SendData chunk ' 发送每个块
DoEvents ' 允许消息处理，确保发送顺利进行
Next
Winsock1.SendData "EOF" ' 表示文件传输完成
' 图片转换为Base64编码的函数
Function ConvertImageToBase64(imagePath As String) As String
Dim stream As Object
Set stream = CreateObject("ADODB.Stream")
stream.Type = 1 ' Binary mode
stream.Open
stream.LoadFromFile imagePath
Dim binaryData() As Byte
binaryData = stream.Read
ConvertImageToBase64 = "data:image/jpeg;base64," & EncodeBase64(binaryData)
End Function
' 将二进制数据编码为Base64的函数
Function EncodeBase64(data() As Byte) As String
Dim objXML As Object
Set objXML = CreateObject("MSXml2.DOMDocument")
Dim objNode As Object
Set objNode = objXML.createElement("b64")
objNode.DataType = "bin.base64"
objNode.nodeTypedValue = data
EncodeBase64 = Replace(objNode.Text, vbLf, "")
Set objNode = Nothing
Set objXML = Nothing
End Function
接收端（服务器）：
〓〓vb代码如下：〓〓
Dim imgData As String '图片的二进制数据
Dim totalChunks As Integer ' 总块数
Dim receivedChunks As Integer ' 已接收的块数
Private Sub Winsock1_DataArrival(ByVal bytesTotal As Long)
Dim receivedData As String
Winsock1.GetData receivedData, vbString ' 接收数据
If receivedData Like "#*" Then ' 接收总块数信息
totalChunks = Val(Mid(receivedData, 2))
receivedChunks = 0
imgData = ""
Exit Sub
End If
If receivedData = "EOF" Then ' 文件传输完成
MsgBox "图片接收完成！"
Exit Sub
End If
imgData = imgData & receivedData ' 拼接接收到的块
receivedChunks = receivedChunks + 1
If receivedChunks = totalChunks Then ' 所有块接收完成，处理图片数据
ProcessImageData imgData
End If
End Sub
' 处理接收到的图片数据的函数
Sub ProcessImageData(imageData As String)' 在这里可以根据需要，将Base64编码的图片数据转换为图像对象并进行处理或保存操作' 例如：' Dim img As StdPicture' Set img = LoadPicture(Base64ToBinary(imageData))' img.Save "path_to_save_image.jpg"
End Sub
' 将Base64编码转换为二进制数据的函数
Function Base64ToBinary(base64String As String) As Byte()
Dim objXML As Object
Set objXML = CreateObject("MSXml2.DOMDocument")
Dim objNode As Object
Set objNode = objXML.createElement("b64")
objNode.DataType = "bin.base64"
objNode.Text = base64String
Base64ToBinary = objNode.nodeTypedValue
Set objNode = Nothing
Set objXML = Nothing
End Function
上面土嘎嘎给出的例子代码演示了通过VB Winsock在客户端和服务器之间传输图片数据