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VB 判断图片文件的类型格式

2013-07-18 08:36:55| 分类：编程-VB | 标签： |举报 |字号大中小订阅

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'VB 通过二进制方式来判断图片的格式，下面只对 JPG 、GIF、PNG、BMP、ICO 几个常用的图片格式做了判断。

Public Function GetImageType(ByteArray() As Byte) As String
    If ByteArray(0) = &HFF And ByteArray(1) = &HD8 Then
        GetImageType = "JPG"
    ElseIf ByteArray(0) = &H47 And ByteArray(1) = &H49 Then
        GetImageType = "GIF"
    ElseIf ByteArray(0) = &H42 And ByteArray(1) = &H4D Then
        GetImageType = "BMP"
    ElseIf ByteArray(0) = &H89 And ByteArray(1) = &H50 Then
        GetImageType = "PNG"
    ElseIf ByteArray(0) = &H0 And ByteArray(1) = &H0 And ByteArray(2) = &H1 And ByteArray(3) = &H0 And ByteArray(4) = &H1 Then
        GetImageType = "ICO"
    End If
End Function

摘自：网络整理

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