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| 关键词： nbsp Function fichero HexAt HexToDec Else Then End fso decimal |
<!--#include virtual="/learn/test/lib_graphicdetect.asp"--><html><head><TITLE>dbtable.asp</TITLE></head><body bgcolor="#FFFFFF"><% graphic="images/learnaspiconmain.webp" HW = ReadImg(graphic) Response.Write graphic & " Dimensions: " & HW(0) & "x" & HW(1) & "<br>" response.write "<img src=""/" & graphic & """" response.write height=""" & HW(0) & """ response.write width=""" & HW(0) & "">"%></body></html> The library that is included is: <%Dim HW Function AscAt(s, n) AscAt = Asc(Mid(s, n, 1))End Function Function HexAt(s, n) HexAt = Hex(AscAt(s, n))End Function Function isJPG(fichero) If inStr(uCase(fichero), ".JPG") <> 0 Then isJPG = true Else isJPG = false End IfEnd Function Function isPNG(fichero) If inStr(uCase(fichero), ".PNG") <> 0 Then isPNG = true Else isPNG = false End IfEnd Function Function isGIF(fichero) If inStr(uCase(fichero), ".GIF") <> 0 Then isGIF = true Else isGIF = false End IfEnd Function Function isBMP(fichero) If inStr(uCase(fichero), ".BMP") <> 0 Then isBMP = true Else isBMP = false End IfEnd Function Function isWMF(fichero) If inStr(uCase(fichero), ".WMF") <> 0 Then isWMF = true Else isWMF = false End IfEnd Function Function isWebImg(f) If isGIF(f) Or isJPG(f) Or isPNG(f) Or isBMP(f) Or isWMF(f) Then isWebImg = true Else isWebImg = true End IfEnd Function Function ReadImg(fichero) If isGIF(fichero) Then ReadImg = ReadGIF(fichero) Else If isJPG(fichero) Then ReadImg = ReadJPG(fichero) Else If isPNG(fichero) Then ReadImg = ReadPNG(fichero) Else If isBMP(fichero) Then ReadImg = ReadPNG(fichero) Else If isWMF(fichero) Then ReadImg = ReadWMF(fichero) Else ReadImg = Array(0,0) End If End If End If End If End IfEnd Function Function ReadJPG(fichero) Dim fso, ts, s, HW, nbytes HW = Array("","") Set fso = CreateObject("Scripting.FileSystemObject") Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1) s = Right(ts.Read(167), 4) HW(0) = HexToDec(HexAt(s,3) & HexAt(s,4)) HW(1) = HexToDec(HexAt(s,1) & HexAt(s,2)) ts.Close ReadJPG = HWEnd Function Function ReadPNG(fichero) Dim fso, ts, s, HW, nbytes HW = Array("","") Set fso = CreateObject("Scripting.FileSystemObject") Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1) s = Right(ts.Read(24), 8) HW(0) = HexToDec(HexAt(s,3) & HexAt(s,4)) HW(1) = HexToDec(HexAt(s,7) & HexAt(s,8)) ts.Close ReadPNG = HWEnd Function Function ReadGIF(fichero) Dim fso, ts, s, HW, nbytes HW = Array("","") Set fso = CreateObject("Scripting.FileSystemObject") Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1) s = Right(ts.Read(10), 4) HW(0) = HexToDec(HexAt(s,2) & HexAt(s,1)) HW(1) = HexToDec(HexAt(s,4) & HexAt(s,3)) ts.Close ReadGIF = HWEnd Function Function ReadWMF(fichero) Dim fso, ts, s, HW, nbytes HW = Array("","") Set fso = CreateObject("Scripting.FileSystemObject") Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1) s = Right(ts.Read(14), 4) HW(0) = HexToDec(HexAt(s,2) & HexAt(s,1)) HW(1) = HexToDec(HexAt(s,4) & HexAt(s,3)) ts.Close ReadWMF = HWEnd Function Function ReadBMP(fichero) Dim fso, ts, s, HW, nbytes HW = Array("","") Set fso = CreateObject("Scripting.FileSystemObject") Set ts = fso.OpenTextFile(Server.MapPath("/" & fichero), 1) s = Right(ts.Read(24), 8) HW(0) = HexToDec(HexAt(s,4) & HexAt(s,3)) HW(1) = HexToDec(HexAt(s,8) & HexAt(s,7)) ts.Close ReadBMP = HWEnd Function Function isDigit(c) If inStr("0123456789", c) <> 0 Then isDigit = true Else isDigit = false End IfEnd Function Function isHex(c) If inStr("0123456789ABCDEFabcdef", c) <> 0 Then isHex = true Else ishex = false End IfEnd Function Function HexToDec(cadhex) Dim n, i, ch, decimal decimal = 0 n = Len(cadhex) For i=1 To n ch = Mid(cadhex, i, 1) If isHex(ch) Then decimal = decimal * 16 If isDigit(c) Then decimal = decimal + ch Else decimal = decimal + Asc(uCase(ch)) - Asc("A") End If Else HexToDec = -1 End If Next HexToDec = decimalEnd Function%> |
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